/******/ (function(modules) { // webpackBootstrap
/******/ 	// The module cache
/******/ 	var installedModules = {};

/******/ 	// The require function
/******/ 	function __webpack_require__(moduleId) {

/******/ 		// Check if module is in cache
/******/ 		if(installedModules[moduleId])
/******/ 			return installedModules[moduleId].exports;

/******/ 		// Create a new module (and put it into the cache)
/******/ 		var module = installedModules[moduleId] = {
/******/ 			exports: {},
/******/ 			id: moduleId,
/******/ 			loaded: false
/******/ 		};

/******/ 		// Execute the module function
/******/ 		modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);

/******/ 		// Flag the module as loaded
/******/ 		module.loaded = true;

/******/ 		// Return the exports of the module
/******/ 		return module.exports;
/******/ 	}


/******/ 	// expose the modules object (__webpack_modules__)
/******/ 	__webpack_require__.m = modules;

/******/ 	// expose the module cache
/******/ 	__webpack_require__.c = installedModules;

/******/ 	// __webpack_public_path__
/******/ 	__webpack_require__.p = "";

/******/ 	// Load entry module and return exports
/******/ 	return __webpack_require__(0);
/******/ })
/************************************************************************/
/******/ ([
/* 0 */
/***/ (function(module, exports, __webpack_require__) {

	module.exports = __webpack_require__(1);


/***/ }),
/* 1 */
/***/ (function(module, exports, __webpack_require__) {

	'use strict';var _three = __webpack_require__(2);var THREE = _interopRequireWildcard(_three);function _interopRequireWildcard(obj) {if (obj && obj.__esModule) {return obj;} else {var newObj = {};if (obj != null) {for (var key in obj) {if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key];}}newObj.default = obj;return newObj;}}

	var renderer = new THREE.WebGLRenderer();
	renderer.setSize(window.innerWidth, window.innerHeight);
	renderer.setClearColor(0xb9d3ff, 1); //设置背景颜色
	document.body.appendChild(renderer.domElement);

	var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1, 1000);
	camera.position.set(0, 0, 100);
	camera.lookAt(0, 0, 0);

	var scene = new THREE.Scene();



	renderer.render(scene, camera);

/***/ }),
/* 2 */
/***/ (function(module, exports, __webpack_require__) {

	(function (global, factory) {
		 true ? factory(exports) :
		typeof define === 'function' && define.amd ? define(['exports'], factory) :
		(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.THREE = {}));
	}(this, (function (exports) { 'use strict';

		// Polyfills

		if ( Number.EPSILON === undefined ) {

			Number.EPSILON = Math.pow( 2, - 52 );

		}

		if ( Number.isInteger === undefined ) {

			// Missing in IE
			// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isInteger

			Number.isInteger = function ( value ) {

				return typeof value === 'number' && isFinite( value ) && Math.floor( value ) === value;

			};

		}

		//

		if ( Math.sign === undefined ) {

			// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign

			Math.sign = function ( x ) {

				return ( x < 0 ) ? - 1 : ( x > 0 ) ? 1 : + x;

			};

		}

		if ( 'name' in Function.prototype === false ) {

			// Missing in IE
			// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name

			Object.defineProperty( Function.prototype, 'name', {

				get: function () {

					return this.toString().match( /^\s*function\s*([^\(\s]*)/ )[ 1 ];

				}

			} );

		}

		if ( Object.assign === undefined ) {

			// Missing in IE
			// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign

			Object.assign = function ( target ) {

				if ( target === undefined || target === null ) {

					throw new TypeError( 'Cannot convert undefined or null to object' );

				}

				var output = Object( target );

				for ( var index = 1; index < arguments.length; index ++ ) {

					var source = arguments[ index ];

					if ( source !== undefined && source !== null ) {

						for ( var nextKey in source ) {

							if ( Object.prototype.hasOwnProperty.call( source, nextKey ) ) {

								output[ nextKey ] = source[ nextKey ];

							}

						}

					}

				}

				return output;

			};

		}

		var REVISION = '120';
		var MOUSE = { LEFT: 0, MIDDLE: 1, RIGHT: 2, ROTATE: 0, DOLLY: 1, PAN: 2 };
		var TOUCH = { ROTATE: 0, PAN: 1, DOLLY_PAN: 2, DOLLY_ROTATE: 3 };
		var CullFaceNone = 0;
		var CullFaceBack = 1;
		var CullFaceFront = 2;
		var CullFaceFrontBack = 3;
		var BasicShadowMap = 0;
		var PCFShadowMap = 1;
		var PCFSoftShadowMap = 2;
		var VSMShadowMap = 3;
		var FrontSide = 0;
		var BackSide = 1;
		var DoubleSide = 2;
		var FlatShading = 1;
		var SmoothShading = 2;
		var NoBlending = 0;
		var NormalBlending = 1;
		var AdditiveBlending = 2;
		var SubtractiveBlending = 3;
		var MultiplyBlending = 4;
		var CustomBlending = 5;
		var AddEquation = 100;
		var SubtractEquation = 101;
		var ReverseSubtractEquation = 102;
		var MinEquation = 103;
		var MaxEquation = 104;
		var ZeroFactor = 200;
		var OneFactor = 201;
		var SrcColorFactor = 202;
		var OneMinusSrcColorFactor = 203;
		var SrcAlphaFactor = 204;
		var OneMinusSrcAlphaFactor = 205;
		var DstAlphaFactor = 206;
		var OneMinusDstAlphaFactor = 207;
		var DstColorFactor = 208;
		var OneMinusDstColorFactor = 209;
		var SrcAlphaSaturateFactor = 210;
		var NeverDepth = 0;
		var AlwaysDepth = 1;
		var LessDepth = 2;
		var LessEqualDepth = 3;
		var EqualDepth = 4;
		var GreaterEqualDepth = 5;
		var GreaterDepth = 6;
		var NotEqualDepth = 7;
		var MultiplyOperation = 0;
		var MixOperation = 1;
		var AddOperation = 2;
		var NoToneMapping = 0;
		var LinearToneMapping = 1;
		var ReinhardToneMapping = 2;
		var CineonToneMapping = 3;
		var ACESFilmicToneMapping = 4;
		var CustomToneMapping = 5;

		var UVMapping = 300;
		var CubeReflectionMapping = 301;
		var CubeRefractionMapping = 302;
		var EquirectangularReflectionMapping = 303;
		var EquirectangularRefractionMapping = 304;
		var CubeUVReflectionMapping = 306;
		var CubeUVRefractionMapping = 307;
		var RepeatWrapping = 1000;
		var ClampToEdgeWrapping = 1001;
		var MirroredRepeatWrapping = 1002;
		var NearestFilter = 1003;
		var NearestMipmapNearestFilter = 1004;
		var NearestMipMapNearestFilter = 1004;
		var NearestMipmapLinearFilter = 1005;
		var NearestMipMapLinearFilter = 1005;
		var LinearFilter = 1006;
		var LinearMipmapNearestFilter = 1007;
		var LinearMipMapNearestFilter = 1007;
		var LinearMipmapLinearFilter = 1008;
		var LinearMipMapLinearFilter = 1008;
		var UnsignedByteType = 1009;
		var ByteType = 1010;
		var ShortType = 1011;
		var UnsignedShortType = 1012;
		var IntType = 1013;
		var UnsignedIntType = 1014;
		var FloatType = 1015;
		var HalfFloatType = 1016;
		var UnsignedShort4444Type = 1017;
		var UnsignedShort5551Type = 1018;
		var UnsignedShort565Type = 1019;
		var UnsignedInt248Type = 1020;
		var AlphaFormat = 1021;
		var RGBFormat = 1022;
		var RGBAFormat = 1023;
		var LuminanceFormat = 1024;
		var LuminanceAlphaFormat = 1025;
		var RGBEFormat = RGBAFormat;
		var DepthFormat = 1026;
		var DepthStencilFormat = 1027;
		var RedFormat = 1028;
		var RedIntegerFormat = 1029;
		var RGFormat = 1030;
		var RGIntegerFormat = 1031;
		var RGBIntegerFormat = 1032;
		var RGBAIntegerFormat = 1033;

		var RGB_S3TC_DXT1_Format = 33776;
		var RGBA_S3TC_DXT1_Format = 33777;
		var RGBA_S3TC_DXT3_Format = 33778;
		var RGBA_S3TC_DXT5_Format = 33779;
		var RGB_PVRTC_4BPPV1_Format = 35840;
		var RGB_PVRTC_2BPPV1_Format = 35841;
		var RGBA_PVRTC_4BPPV1_Format = 35842;
		var RGBA_PVRTC_2BPPV1_Format = 35843;
		var RGB_ETC1_Format = 36196;
		var RGB_ETC2_Format = 37492;
		var RGBA_ETC2_EAC_Format = 37496;
		var RGBA_ASTC_4x4_Format = 37808;
		var RGBA_ASTC_5x4_Format = 37809;
		var RGBA_ASTC_5x5_Format = 37810;
		var RGBA_ASTC_6x5_Format = 37811;
		var RGBA_ASTC_6x6_Format = 37812;
		var RGBA_ASTC_8x5_Format = 37813;
		var RGBA_ASTC_8x6_Format = 37814;
		var RGBA_ASTC_8x8_Format = 37815;
		var RGBA_ASTC_10x5_Format = 37816;
		var RGBA_ASTC_10x6_Format = 37817;
		var RGBA_ASTC_10x8_Format = 37818;
		var RGBA_ASTC_10x10_Format = 37819;
		var RGBA_ASTC_12x10_Format = 37820;
		var RGBA_ASTC_12x12_Format = 37821;
		var RGBA_BPTC_Format = 36492;
		var SRGB8_ALPHA8_ASTC_4x4_Format = 37840;
		var SRGB8_ALPHA8_ASTC_5x4_Format = 37841;
		var SRGB8_ALPHA8_ASTC_5x5_Format = 37842;
		var SRGB8_ALPHA8_ASTC_6x5_Format = 37843;
		var SRGB8_ALPHA8_ASTC_6x6_Format = 37844;
		var SRGB8_ALPHA8_ASTC_8x5_Format = 37845;
		var SRGB8_ALPHA8_ASTC_8x6_Format = 37846;
		var SRGB8_ALPHA8_ASTC_8x8_Format = 37847;
		var SRGB8_ALPHA8_ASTC_10x5_Format = 37848;
		var SRGB8_ALPHA8_ASTC_10x6_Format = 37849;
		var SRGB8_ALPHA8_ASTC_10x8_Format = 37850;
		var SRGB8_ALPHA8_ASTC_10x10_Format = 37851;
		var SRGB8_ALPHA8_ASTC_12x10_Format = 37852;
		var SRGB8_ALPHA8_ASTC_12x12_Format = 37853;
		var LoopOnce = 2200;
		var LoopRepeat = 2201;
		var LoopPingPong = 2202;
		var InterpolateDiscrete = 2300;
		var InterpolateLinear = 2301;
		var InterpolateSmooth = 2302;
		var ZeroCurvatureEnding = 2400;
		var ZeroSlopeEnding = 2401;
		var WrapAroundEnding = 2402;
		var NormalAnimationBlendMode = 2500;
		var AdditiveAnimationBlendMode = 2501;
		var TrianglesDrawMode = 0;
		var TriangleStripDrawMode = 1;
		var TriangleFanDrawMode = 2;
		var LinearEncoding = 3000;
		var sRGBEncoding = 3001;
		var GammaEncoding = 3007;
		var RGBEEncoding = 3002;
		var LogLuvEncoding = 3003;
		var RGBM7Encoding = 3004;
		var RGBM16Encoding = 3005;
		var RGBDEncoding = 3006;
		var BasicDepthPacking = 3200;
		var RGBADepthPacking = 3201;
		var TangentSpaceNormalMap = 0;
		var ObjectSpaceNormalMap = 1;

		var ZeroStencilOp = 0;
		var KeepStencilOp = 7680;
		var ReplaceStencilOp = 7681;
		var IncrementStencilOp = 7682;
		var DecrementStencilOp = 7683;
		var IncrementWrapStencilOp = 34055;
		var DecrementWrapStencilOp = 34056;
		var InvertStencilOp = 5386;

		var NeverStencilFunc = 512;
		var LessStencilFunc = 513;
		var EqualStencilFunc = 514;
		var LessEqualStencilFunc = 515;
		var GreaterStencilFunc = 516;
		var NotEqualStencilFunc = 517;
		var GreaterEqualStencilFunc = 518;
		var AlwaysStencilFunc = 519;

		var StaticDrawUsage = 35044;
		var DynamicDrawUsage = 35048;
		var StreamDrawUsage = 35040;
		var StaticReadUsage = 35045;
		var DynamicReadUsage = 35049;
		var StreamReadUsage = 35041;
		var StaticCopyUsage = 35046;
		var DynamicCopyUsage = 35050;
		var StreamCopyUsage = 35042;

		var GLSL1 = "100";
		var GLSL3 = "300 es";

		/**
		 * https://github.com/mrdoob/eventdispatcher.js/
		 */

		function EventDispatcher() {}

		Object.assign( EventDispatcher.prototype, {

			addEventListener: function ( type, listener ) {

				if ( this._listeners === undefined ) { this._listeners = {}; }

				var listeners = this._listeners;

				if ( listeners[ type ] === undefined ) {

					listeners[ type ] = [];

				}

				if ( listeners[ type ].indexOf( listener ) === - 1 ) {

					listeners[ type ].push( listener );

				}

			},

			hasEventListener: function ( type, listener ) {

				if ( this._listeners === undefined ) { return false; }

				var listeners = this._listeners;

				return listeners[ type ] !== undefined && listeners[ type ].indexOf( listener ) !== - 1;

			},

			removeEventListener: function ( type, listener ) {

				if ( this._listeners === undefined ) { return; }

				var listeners = this._listeners;
				var listenerArray = listeners[ type ];

				if ( listenerArray !== undefined ) {

					var index = listenerArray.indexOf( listener );

					if ( index !== - 1 ) {

						listenerArray.splice( index, 1 );

					}

				}

			},

			dispatchEvent: function ( event ) {

				if ( this._listeners === undefined ) { return; }

				var listeners = this._listeners;
				var listenerArray = listeners[ event.type ];

				if ( listenerArray !== undefined ) {

					event.target = this;

					// Make a copy, in case listeners are removed while iterating.
					var array = listenerArray.slice( 0 );

					for ( var i = 0, l = array.length; i < l; i ++ ) {

						array[ i ].call( this, event );

					}

				}

			}

		} );

		var _lut = [];

		for ( var i = 0; i < 256; i ++ ) {

			_lut[ i ] = ( i < 16 ? '0' : '' ) + ( i ).toString( 16 );

		}

		var _seed = 1234567;

		var MathUtils = {

			DEG2RAD: Math.PI / 180,
			RAD2DEG: 180 / Math.PI,

			generateUUID: function () {

				// http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript/21963136#21963136

				var d0 = Math.random() * 0xffffffff | 0;
				var d1 = Math.random() * 0xffffffff | 0;
				var d2 = Math.random() * 0xffffffff | 0;
				var d3 = Math.random() * 0xffffffff | 0;
				var uuid = _lut[ d0 & 0xff ] + _lut[ d0 >> 8 & 0xff ] + _lut[ d0 >> 16 & 0xff ] + _lut[ d0 >> 24 & 0xff ] + '-' +
					_lut[ d1 & 0xff ] + _lut[ d1 >> 8 & 0xff ] + '-' + _lut[ d1 >> 16 & 0x0f | 0x40 ] + _lut[ d1 >> 24 & 0xff ] + '-' +
					_lut[ d2 & 0x3f | 0x80 ] + _lut[ d2 >> 8 & 0xff ] + '-' + _lut[ d2 >> 16 & 0xff ] + _lut[ d2 >> 24 & 0xff ] +
					_lut[ d3 & 0xff ] + _lut[ d3 >> 8 & 0xff ] + _lut[ d3 >> 16 & 0xff ] + _lut[ d3 >> 24 & 0xff ];

				// .toUpperCase() here flattens concatenated strings to save heap memory space.
				return uuid.toUpperCase();

			},

			clamp: function ( value, min, max ) {

				return Math.max( min, Math.min( max, value ) );

			},

			// compute euclidian modulo of m % n
			// https://en.wikipedia.org/wiki/Modulo_operation

			euclideanModulo: function ( n, m ) {

				return ( ( n % m ) + m ) % m;

			},

			// Linear mapping from range <a1, a2> to range <b1, b2>

			mapLinear: function ( x, a1, a2, b1, b2 ) {

				return b1 + ( x - a1 ) * ( b2 - b1 ) / ( a2 - a1 );

			},

			// https://en.wikipedia.org/wiki/Linear_interpolation

			lerp: function ( x, y, t ) {

				return ( 1 - t ) * x + t * y;

			},

			// http://en.wikipedia.org/wiki/Smoothstep

			smoothstep: function ( x, min, max ) {

				if ( x <= min ) { return 0; }
				if ( x >= max ) { return 1; }

				x = ( x - min ) / ( max - min );

				return x * x * ( 3 - 2 * x );

			},

			smootherstep: function ( x, min, max ) {

				if ( x <= min ) { return 0; }
				if ( x >= max ) { return 1; }

				x = ( x - min ) / ( max - min );

				return x * x * x * ( x * ( x * 6 - 15 ) + 10 );

			},

			// Random integer from <low, high> interval

			randInt: function ( low, high ) {

				return low + Math.floor( Math.random() * ( high - low + 1 ) );

			},

			// Random float from <low, high> interval

			randFloat: function ( low, high ) {

				return low + Math.random() * ( high - low );

			},

			// Random float from <-range/2, range/2> interval

			randFloatSpread: function ( range ) {

				return range * ( 0.5 - Math.random() );

			},

			// Deterministic pseudo-random float in the interval [ 0, 1 ]

			seededRandom: function ( s ) {

				if ( s !== undefined ) { _seed = s % 2147483647; }

				// Park-Miller algorithm

				_seed = _seed * 16807 % 2147483647;

				return ( _seed - 1 ) / 2147483646;

			},

			degToRad: function ( degrees ) {

				return degrees * MathUtils.DEG2RAD;

			},

			radToDeg: function ( radians ) {

				return radians * MathUtils.RAD2DEG;

			},

			isPowerOfTwo: function ( value ) {

				return ( value & ( value - 1 ) ) === 0 && value !== 0;

			},

			ceilPowerOfTwo: function ( value ) {

				return Math.pow( 2, Math.ceil( Math.log( value ) / Math.LN2 ) );

			},

			floorPowerOfTwo: function ( value ) {

				return Math.pow( 2, Math.floor( Math.log( value ) / Math.LN2 ) );

			},

			setQuaternionFromProperEuler: function ( q, a, b, c, order ) {

				// Intrinsic Proper Euler Angles - see https://en.wikipedia.org/wiki/Euler_angles

				// rotations are applied to the axes in the order specified by 'order'
				// rotation by angle 'a' is applied first, then by angle 'b', then by angle 'c'
				// angles are in radians

				var cos = Math.cos;
				var sin = Math.sin;

				var c2 = cos( b / 2 );
				var s2 = sin( b / 2 );

				var c13 = cos( ( a + c ) / 2 );
				var s13 = sin( ( a + c ) / 2 );

				var c1_3 = cos( ( a - c ) / 2 );
				var s1_3 = sin( ( a - c ) / 2 );

				var c3_1 = cos( ( c - a ) / 2 );
				var s3_1 = sin( ( c - a ) / 2 );

				switch ( order ) {

					case 'XYX':
						q.set( c2 * s13, s2 * c1_3, s2 * s1_3, c2 * c13 );
						break;

					case 'YZY':
						q.set( s2 * s1_3, c2 * s13, s2 * c1_3, c2 * c13 );
						break;

					case 'ZXZ':
						q.set( s2 * c1_3, s2 * s1_3, c2 * s13, c2 * c13 );
						break;

					case 'XZX':
						q.set( c2 * s13, s2 * s3_1, s2 * c3_1, c2 * c13 );
						break;

					case 'YXY':
						q.set( s2 * c3_1, c2 * s13, s2 * s3_1, c2 * c13 );
						break;

					case 'ZYZ':
						q.set( s2 * s3_1, s2 * c3_1, c2 * s13, c2 * c13 );
						break;

					default:
						console.warn( 'THREE.MathUtils: .setQuaternionFromProperEuler() encountered an unknown order: ' + order );

				}

			}

		};

		var Vector2 = function Vector2( x, y ) {
			if ( x === void 0 ) x = 0;
			if ( y === void 0 ) y = 0;


			Object.defineProperty( this, 'isVector2', { value: true } );

			this.x = x;
			this.y = y;

		};

		var prototypeAccessors = { width: { configurable: true },height: { configurable: true } };

		prototypeAccessors.width.get = function () {

			return this.x;

		};

		prototypeAccessors.width.set = function ( value ) {

			this.x = value;

		};

		prototypeAccessors.height.get = function () {

			return this.y;

		};

		prototypeAccessors.height.set = function ( value ) {

			this.y = value;

		};

		Vector2.prototype.set = function set ( x, y ) {

			this.x = x;
			this.y = y;

			return this;

		};

		Vector2.prototype.setScalar = function setScalar ( scalar ) {

			this.x = scalar;
			this.y = scalar;

			return this;

		};

		Vector2.prototype.setX = function setX ( x ) {

			this.x = x;

			return this;

		};

		Vector2.prototype.setY = function setY ( y ) {

			this.y = y;

			return this;

		};

		Vector2.prototype.setComponent = function setComponent ( index, value ) {

			switch ( index ) {

				case 0: this.x = value; break;
				case 1: this.y = value; break;
				default: throw new Error( 'index is out of range: ' + index );

			}

			return this;

		};

		Vector2.prototype.getComponent = function getComponent ( index ) {

			switch ( index ) {

				case 0: return this.x;
				case 1: return this.y;
				default: throw new Error( 'index is out of range: ' + index );

			}

		};

		Vector2.prototype.clone = function clone () {

			return new this.constructor( this.x, this.y );

		};

		Vector2.prototype.copy = function copy ( v ) {

			this.x = v.x;
			this.y = v.y;

			return this;

		};

		Vector2.prototype.add = function add ( v, w ) {

			if ( w !== undefined ) {

				console.warn( 'THREE.Vector2: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );
				return this.addVectors( v, w );

			}

			this.x += v.x;
			this.y += v.y;

			return this;

		};

		Vector2.prototype.addScalar = function addScalar ( s ) {

			this.x += s;
			this.y += s;

			return this;

		};

		Vector2.prototype.addVectors = function addVectors ( a, b ) {

			this.x = a.x + b.x;
			this.y = a.y + b.y;

			return this;

		};

		Vector2.prototype.addScaledVector = function addScaledVector ( v, s ) {

			this.x += v.x * s;
			this.y += v.y * s;

			return this;

		};

		Vector2.prototype.sub = function sub ( v, w ) {

			if ( w !== undefined ) {

				console.warn( 'THREE.Vector2: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );
				return this.subVectors( v, w );

			}

			this.x -= v.x;
			this.y -= v.y;

			return this;

		};

		Vector2.prototype.subScalar = function subScalar ( s ) {

			this.x -= s;
			this.y -= s;

			return this;

		};

		Vector2.prototype.subVectors = function subVectors ( a, b ) {

			this.x = a.x - b.x;
			this.y = a.y - b.y;

			return this;

		};

		Vector2.prototype.multiply = function multiply ( v ) {

			this.x *= v.x;
			this.y *= v.y;

			return this;

		};

		Vector2.prototype.multiplyScalar = function multiplyScalar ( scalar ) {

			this.x *= scalar;
			this.y *= scalar;

			return this;

		};

		Vector2.prototype.divide = function divide ( v ) {

			this.x /= v.x;
			this.y /= v.y;

			return this;

		};

		Vector2.prototype.divideScalar = function divideScalar ( scalar ) {

			return this.multiplyScalar( 1 / scalar );

		};

		Vector2.prototype.applyMatrix3 = function applyMatrix3 ( m ) {

			var x = this.x, y = this.y;
			var e = m.elements;

			this.x = e[ 0 ] * x + e[ 3 ] * y + e[ 6 ];
			this.y = e[ 1 ] * x + e[ 4 ] * y + e[ 7 ];

			return this;

		};

		Vector2.prototype.min = function min ( v ) {

			this.x = Math.min( this.x, v.x );
			this.y = Math.min( this.y, v.y );

			return this;

		};

		Vector2.prototype.max = function max ( v ) {

			this.x = Math.max( this.x, v.x );
			this.y = Math.max( this.y, v.y );

			return this;

		};

		Vector2.prototype.clamp = function clamp ( min, max ) {

			// assumes min < max, componentwise

			this.x = Math.max( min.x, Math.min( max.x, this.x ) );
			this.y = Math.max( min.y, Math.min( max.y, this.y ) );

			return this;

		};

		Vector2.prototype.clampScalar = function clampScalar ( minVal, maxVal ) {

			this.x = Math.max( minVal, Math.min( maxVal, this.x ) );
			this.y = Math.max( minVal, Math.min( maxVal, this.y ) );

			return this;

		};

		Vector2.prototype.clampLength = function clampLength ( min, max ) {

			var length = this.length();

			return this.divideScalar( length || 1 ).multiplyScalar( Math.max( min, Math.min( max, length ) ) );

		};

		Vector2.prototype.floor = function floor () {

			this.x = Math.floor( this.x );
			this.y = Math.floor( this.y );

			return this;

		};

		Vector2.prototype.ceil = function ceil () {

			this.x = Math.ceil( this.x );
			this.y = Math.ceil( this.y );

			return this;

		};

		Vector2.prototype.round = function round () {

			this.x = Math.round( this.x );
			this.y = Math.round( this.y );

			return this;

		};

		Vector2.prototype.roundToZero = function roundToZero () {

			this.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );
			this.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );

			return this;

		};

		Vector2.prototype.negate = function negate () {

			this.x = - this.x;
			this.y = - this.y;

			return this;

		};

		Vector2.prototype.dot = function dot ( v ) {

			return this.x * v.x + this.y * v.y;

		};

		Vector2.prototype.cross = function cross ( v ) {

			return this.x * v.y - this.y * v.x;

		};

		Vector2.prototype.lengthSq = function lengthSq () {

			return this.x * this.x + this.y * this.y;

		};

		Vector2.prototype.length = function length () {

			return Math.sqrt( this.x * this.x + this.y * this.y );

		};

		Vector2.prototype.manhattanLength = function manhattanLength () {

			return Math.abs( this.x ) + Math.abs( this.y );

		};

		Vector2.prototype.normalize = function normalize () {

			return this.divideScalar( this.length() || 1 );

		};

		Vector2.prototype.angle = function angle () {

			// computes the angle in radians with respect to the positive x-axis

			var angle = Math.atan2( - this.y, - this.x ) + Math.PI;

			return angle;

		};

		Vector2.prototype.distanceTo = function distanceTo ( v ) {

			return Math.sqrt( this.distanceToSquared( v ) );

		};

		Vector2.prototype.distanceToSquared = function distanceToSquared ( v ) {

			var dx = this.x - v.x, dy = this.y - v.y;
			return dx * dx + dy * dy;

		};

		Vector2.prototype.manhattanDistanceTo = function manhattanDistanceTo ( v ) {

			return Math.abs( this.x - v.x ) + Math.abs( this.y - v.y );

		};

		Vector2.prototype.setLength = function setLength ( length ) {

			return this.normalize().multiplyScalar( length );

		};

		Vector2.prototype.lerp = function lerp ( v, alpha ) {

			this.x += ( v.x - this.x ) * alpha;
			this.y += ( v.y - this.y ) * alpha;

			return this;

		};

		Vector2.prototype.lerpVectors = function lerpVectors ( v1, v2, alpha ) {

			this.x = v1.x + ( v2.x - v1.x ) * alpha;
			this.y = v1.y + ( v2.y - v1.y ) * alpha;

			return this;

		};

		Vector2.prototype.equals = function equals ( v ) {

			return ( ( v.x === this.x ) && ( v.y === this.y ) );

		};

		Vector2.prototype.fromArray = function fromArray ( array, offset ) {

			if ( offset === undefined ) { offset = 0; }

			this.x = array[ offset ];
			this.y = array[ offset + 1 ];

			return this;

		};

		Vector2.prototype.toArray = function toArray ( array, offset ) {

			if ( array === undefined ) { array = []; }
			if ( offset === undefined ) { offset = 0; }

			array[ offset ] = this.x;
			array[ offset + 1 ] = this.y;

			return array;

		};

		Vector2.prototype.fromBufferAttribute = function fromBufferAttribute ( attribute, index, offset ) {

			if ( offset !== undefined ) {

				console.warn( 'THREE.Vector2: offset has been removed from .fromBufferAttribute().' );

			}

			this.x = attribute.getX( index );
			this.y = attribute.getY( index );

			return this;

		};

		Vector2.prototype.rotateAround = function rotateAround ( center, angle ) {

			var c = Math.cos( angle ), s = Math.sin( angle );

			var x = this.x - center.x;
			var y = this.y - center.y;

			this.x = x * c - y * s + center.x;
			this.y = x * s + y * c + center.y;

			return this;

		};

		Vector2.prototype.random = function random () {

			this.x = Math.random();
			this.y = Math.random();

			return this;

		};

		Object.defineProperties( Vector2.prototype, prototypeAccessors );

		var Matrix3 = function Matrix3() {

			Object.defineProperty( this, 'isMatrix3', { value: true } );

			this.elements = [

				1, 0, 0,
				0, 1, 0,
				0, 0, 1

			];

			if ( arguments.length > 0 ) {

				console.error( 'THREE.Matrix3: the constructor no longer reads arguments. use .set() instead.' );

			}

		};

		Matrix3.prototype.set = function set ( n11, n12, n13, n21, n22, n23, n31, n32, n33 ) {

			var te = this.elements;

			te[ 0 ] = n11; te[ 1 ] = n21; te[ 2 ] = n31;
			te[ 3 ] = n12; te[ 4 ] = n22; te[ 5 ] = n32;
			te[ 6 ] = n13; te[ 7 ] = n23; te[ 8 ] = n33;

			return this;

		};

		Matrix3.prototype.identity = function identity () {

			this.set(

				1, 0, 0,
				0, 1, 0,
				0, 0, 1

			);

			return this;

		};

		Matrix3.prototype.clone = function clone () {

			return new this.constructor().fromArray( this.elements );

		};

		Matrix3.prototype.copy = function copy ( m ) {

			var te = this.elements;
			var me = m.elements;

			te[ 0 ] = me[ 0 ]; te[ 1 ] = me[ 1 ]; te[ 2 ] = me[ 2 ];
			te[ 3 ] = me[ 3 ]; te[ 4 ] = me[ 4 ]; te[ 5 ] = me[ 5 ];
			te[ 6 ] = me[ 6 ]; te[ 7 ] = me[ 7 ]; te[ 8 ] = me[ 8 ];

			return this;

		};

		Matrix3.prototype.extractBasis = function extractBasis ( xAxis, yAxis, zAxis ) {

			xAxis.setFromMatrix3Column( this, 0 );
			yAxis.setFromMatrix3Column( this, 1 );
			zAxis.setFromMatrix3Column( this, 2 );

			return this;

		};

		Matrix3.prototype.setFromMatrix4 = function setFromMatrix4 ( m ) {

			var me = m.elements;

			this.set(

				me[ 0 ], me[ 4 ], me[ 8 ],
				me[ 1 ], me[ 5 ], me[ 9 ],
				me[ 2 ], me[ 6 ], me[ 10 ]

			);

			return this;

		};

		Matrix3.prototype.multiply = function multiply ( m ) {

			return this.multiplyMatrices( this, m );

		};

		Matrix3.prototype.premultiply = function premultiply ( m ) {

			return this.multiplyMatrices( m, this );

		};

		Matrix3.prototype.multiplyMatrices = function multiplyMatrices ( a, b ) {

			var ae = a.elements;
			var be = b.elements;
			var te = this.elements;

			var a11 = ae[ 0 ], a12 = ae[ 3 ], a13 = ae[ 6 ];
			var a21 = ae[ 1 ], a22 = ae[ 4 ], a23 = ae[ 7 ];
			var a31 = ae[ 2 ], a32 = ae[ 5 ], a33 = ae[ 8 ];

			var b11 = be[ 0 ], b12 = be[ 3 ], b13 = be[ 6 ];
			var b21 = be[ 1 ], b22 = be[ 4 ], b23 = be[ 7 ];
			var b31 = be[ 2 ], b32 = be[ 5 ], b33 = be[ 8 ];

			te[ 0 ] = a11 * b11 + a12 * b21 + a13 * b31;
			te[ 3 ] = a11 * b12 + a12 * b22 + a13 * b32;
			te[ 6 ] = a11 * b13 + a12 * b23 + a13 * b33;

			te[ 1 ] = a21 * b11 + a22 * b21 + a23 * b31;
			te[ 4 ] = a21 * b12 + a22 * b22 + a23 * b32;
			te[ 7 ] = a21 * b13 + a22 * b23 + a23 * b33;

			te[ 2 ] = a31 * b11 + a32 * b21 + a33 * b31;
			te[ 5 ] = a31 * b12 + a32 * b22 + a33 * b32;
			te[ 8 ] = a31 * b13 + a32 * b23 + a33 * b33;

			return this;

		};

		Matrix3.prototype.multiplyScalar = function multiplyScalar ( s ) {

			var te = this.elements;

			te[ 0 ] *= s; te[ 3 ] *= s; te[ 6 ] *= s;
			te[ 1 ] *= s; te[ 4 ] *= s; te[ 7 ] *= s;
			te[ 2 ] *= s; te[ 5 ] *= s; te[ 8 ] *= s;

			return this;

		};

		Matrix3.prototype.determinant = function determinant () {

			var te = this.elements;

			var a = te[ 0 ], b = te[ 1 ], c = te[ 2 ],
				d = te[ 3 ], e = te[ 4 ], f = te[ 5 ],
				g = te[ 6 ], h = te[ 7 ], i = te[ 8 ];

			return a * e * i - a * f * h - b * d * i + b * f * g + c * d * h - c * e * g;

		};

		Matrix3.prototype.getInverse = function getInverse ( matrix, throwOnDegenerate ) {

			if ( throwOnDegenerate !== undefined ) {

				console.warn( "THREE.Matrix3: .getInverse() can no longer be configured to throw on degenerate." );

			}

			var me = matrix.elements,
				te = this.elements,

				n11 = me[ 0 ], n21 = me[ 1 ], n31 = me[ 2 ],
				n12 = me[ 3 ], n22 = me[ 4 ], n32 = me[ 5 ],
				n13 = me[ 6 ], n23 = me[ 7 ], n33 = me[ 8 ],

				t11 = n33 * n22 - n32 * n23,
				t12 = n32 * n13 - n33 * n12,
				t13 = n23 * n12 - n22 * n13,

				det = n11 * t11 + n21 * t12 + n31 * t13;

			if ( det === 0 ) { return this.set( 0, 0, 0, 0, 0, 0, 0, 0, 0 ); }

			var detInv = 1 / det;

			te[ 0 ] = t11 * detInv;
			te[ 1 ] = ( n31 * n23 - n33 * n21 ) * detInv;
			te[ 2 ] = ( n32 * n21 - n31 * n22 ) * detInv;

			te[ 3 ] = t12 * detInv;
			te[ 4 ] = ( n33 * n11 - n31 * n13 ) * detInv;
			te[ 5 ] = ( n31 * n12 - n32 * n11 ) * detInv;

			te[ 6 ] = t13 * detInv;
			te[ 7 ] = ( n21 * n13 - n23 * n11 ) * detInv;
			te[ 8 ] = ( n22 * n11 - n21 * n12 ) * detInv;

			return this;

		};

		Matrix3.prototype.transpose = function transpose () {

			var tmp;
			var m = this.elements;

			tmp = m[ 1 ]; m[ 1 ] = m[ 3 ]; m[ 3 ] = tmp;
			tmp = m[ 2 ]; m[ 2 ] = m[ 6 ]; m[ 6 ] = tmp;
			tmp = m[ 5 ]; m[ 5 ] = m[ 7 ]; m[ 7 ] = tmp;

			return this;

		};

		Matrix3.prototype.getNormalMatrix = function getNormalMatrix ( matrix4 ) {

			return this.setFromMatrix4( matrix4 ).getInverse( this ).transpose();

		};

		Matrix3.prototype.transposeIntoArray = function transposeIntoArray ( r ) {

			var m = this.elements;

			r[ 0 ] = m[ 0 ];
			r[ 1 ] = m[ 3 ];
			r[ 2 ] = m[ 6 ];
			r[ 3 ] = m[ 1 ];
			r[ 4 ] = m[ 4 ];
			r[ 5 ] = m[ 7 ];
			r[ 6 ] = m[ 2 ];
			r[ 7 ] = m[ 5 ];
			r[ 8 ] = m[ 8 ];

			return this;

		};

		Matrix3.prototype.setUvTransform = function setUvTransform ( tx, ty, sx, sy, rotation, cx, cy ) {

			var c = Math.cos( rotation );
			var s = Math.sin( rotation );

			this.set(
				sx * c, sx * s, - sx * ( c * cx + s * cy ) + cx + tx,
				- sy * s, sy * c, - sy * ( - s * cx + c * cy ) + cy + ty,
				0, 0, 1
			);

		};

		Matrix3.prototype.scale = function scale ( sx, sy ) {

			var te = this.elements;

			te[ 0 ] *= sx; te[ 3 ] *= sx; te[ 6 ] *= sx;
			te[ 1 ] *= sy; te[ 4 ] *= sy; te[ 7 ] *= sy;

			return this;

		};

		Matrix3.prototype.rotate = function rotate ( theta ) {

			var c = Math.cos( theta );
			var s = Math.sin( theta );

			var te = this.elements;

			var a11 = te[ 0 ], a12 = te[ 3 ], a13 = te[ 6 ];
			var a21 = te[ 1 ], a22 = te[ 4 ], a23 = te[ 7 ];

			te[ 0 ] = c * a11 + s * a21;
			te[ 3 ] = c * a12 + s * a22;
			te[ 6 ] = c * a13 + s * a23;

			te[ 1 ] = - s * a11 + c * a21;
			te[ 4 ] = - s * a12 + c * a22;
			te[ 7 ] = - s * a13 + c * a23;

			return this;

		};

		Matrix3.prototype.translate = function translate ( tx, ty ) {

			var te = this.elements;

			te[ 0 ] += tx * te[ 2 ]; te[ 3 ] += tx * te[ 5 ]; te[ 6 ] += tx * te[ 8 ];
			te[ 1 ] += ty * te[ 2 ]; te[ 4 ] += ty * te[ 5 ]; te[ 7 ] += ty * te[ 8 ];

			return this;

		};

		Matrix3.prototype.equals = function equals ( matrix ) {

			var te = this.elements;
			var me = matrix.elements;

			for ( var i = 0; i < 9; i ++ ) {

				if ( te[ i ] !== me[ i ] ) { return false; }

			}

			return true;

		};

		Matrix3.prototype.fromArray = function fromArray ( array, offset ) {

			if ( offset === undefined ) { offset = 0; }

			for ( var i = 0; i < 9; i ++ ) {

				this.elements[ i ] = array[ i + offset ];

			}

			return this;

		};

		Matrix3.prototype.toArray = function toArray ( array, offset ) {

			if ( array === undefined ) { array = []; }
			if ( offset === undefined ) { offset = 0; }

			var te = this.elements;

			array[ offset ] = te[ 0 ];
			array[ offset + 1 ] = te[ 1 ];
			array[ offset + 2 ] = te[ 2 ];

			array[ offset + 3 ] = te[ 3 ];
			array[ offset + 4 ] = te[ 4 ];
			array[ offset + 5 ] = te[ 5 ];

			array[ offset + 6 ] = te[ 6 ];
			array[ offset + 7 ] = te[ 7 ];
			array[ offset + 8 ] = te[ 8 ];

			return array;

		};

		var _canvas;

		var ImageUtils = {

			getDataURL: function ( image ) {

				if ( /^data:/i.test( image.src ) ) {

					return image.src;

				}

				if ( typeof HTMLCanvasElement == 'undefined' ) {

					return image.src;

				}

				var canvas;

				if ( image instanceof HTMLCanvasElement ) {

					canvas = image;

				} else {

					if ( _canvas === undefined ) { _canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' ); }

					_canvas.width = image.width;
					_canvas.height = image.height;

					var context = _canvas.getContext( '2d' );

					if ( image instanceof ImageData ) {

						context.putImageData( image, 0, 0 );

					} else {

						context.drawImage( image, 0, 0, image.width, image.height );

					}

					canvas = _canvas;

				}

				if ( canvas.width > 2048 || canvas.height > 2048 ) {

					return canvas.toDataURL( 'image/jpeg', 0.6 );

				} else {

					return canvas.toDataURL( 'image/png' );

				}

			}

		};

		var textureId = 0;

		function Texture( image, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding ) {

			Object.defineProperty( this, 'id', { value: textureId ++ } );

			this.uuid = MathUtils.generateUUID();

			this.name = '';

			this.image = image !== undefined ? image : Texture.DEFAULT_IMAGE;
			this.mipmaps = [];

			this.mapping = mapping !== undefined ? mapping : Texture.DEFAULT_MAPPING;

			this.wrapS = wrapS !== undefined ? wrapS : ClampToEdgeWrapping;
			this.wrapT = wrapT !== undefined ? wrapT : ClampToEdgeWrapping;

			this.magFilter = magFilter !== undefined ? magFilter : LinearFilter;
			this.minFilter = minFilter !== undefined ? minFilter : LinearMipmapLinearFilter;

			this.anisotropy = anisotropy !== undefined ? anisotropy : 1;

			this.format = format !== undefined ? format : RGBAFormat;
			this.internalFormat = null;
			this.type = type !== undefined ? type : UnsignedByteType;

			this.offset = new Vector2( 0, 0 );
			this.repeat = new Vector2( 1, 1 );
			this.center = new Vector2( 0, 0 );
			this.rotation = 0;

			this.matrixAutoUpdate = true;
			this.matrix = new Matrix3();

			this.generateMipmaps = true;
			this.premultiplyAlpha = false;
			this.flipY = true;
			this.unpackAlignment = 4;	// valid values: 1, 2, 4, 8 (see http://www.khronos.org/opengles/sdk/docs/man/xhtml/glPixelStorei.xml)

			// Values of encoding !== THREE.LinearEncoding only supported on map, envMap and emissiveMap.
			//
			// Also changing the encoding after already used by a Material will not automatically make the Material
			// update. You need to explicitly call Material.needsUpdate to trigger it to recompile.
			this.encoding = encoding !== undefined ? encoding : LinearEncoding;

			this.version = 0;
			this.onUpdate = null;

		}

		Texture.DEFAULT_IMAGE = undefined;
		Texture.DEFAULT_MAPPING = UVMapping;

		Texture.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {

			constructor: Texture,

			isTexture: true,

			updateMatrix: function () {

				this.matrix.setUvTransform( this.offset.x, this.offset.y, this.repeat.x, this.repeat.y, this.rotation, this.center.x, this.center.y );

			},

			clone: function () {

				return new this.constructor().copy( this );

			},

			copy: function ( source ) {

				this.name = source.name;

				this.image = source.image;
				this.mipmaps = source.mipmaps.slice( 0 );

				this.mapping = source.mapping;

				this.wrapS = source.wrapS;
				this.wrapT = source.wrapT;

				this.magFilter = source.magFilter;
				this.minFilter = source.minFilter;

				this.anisotropy = source.anisotropy;

				this.format = source.format;
				this.internalFormat = source.internalFormat;
				this.type = source.type;

				this.offset.copy( source.offset );
				this.repeat.copy( source.repeat );
				this.center.copy( source.center );
				this.rotation = source.rotation;

				this.matrixAutoUpdate = source.matrixAutoUpdate;
				this.matrix.copy( source.matrix );

				this.generateMipmaps = source.generateMipmaps;
				this.premultiplyAlpha = source.premultiplyAlpha;
				this.flipY = source.flipY;
				this.unpackAlignment = source.unpackAlignment;
				this.encoding = source.encoding;

				return this;

			},

			toJSON: function ( meta ) {

				var isRootObject = ( meta === undefined || typeof meta === 'string' );

				if ( ! isRootObject && meta.textures[ this.uuid ] !== undefined ) {

					return meta.textures[ this.uuid ];

				}

				var output = {

					metadata: {
						version: 4.5,
						type: 'Texture',
						generator: 'Texture.toJSON'
					},

					uuid: this.uuid,
					name: this.name,

					mapping: this.mapping,

					repeat: [ this.repeat.x, this.repeat.y ],
					offset: [ this.offset.x, this.offset.y ],
					center: [ this.center.x, this.center.y ],
					rotation: this.rotation,

					wrap: [ this.wrapS, this.wrapT ],

					format: this.format,
					type: this.type,
					encoding: this.encoding,

					minFilter: this.minFilter,
					magFilter: this.magFilter,
					anisotropy: this.anisotropy,

					flipY: this.flipY,

					premultiplyAlpha: this.premultiplyAlpha,
					unpackAlignment: this.unpackAlignment

				};

				if ( this.image !== undefined ) {

					// TODO: Move to THREE.Image

					var image = this.image;

					if ( image.uuid === undefined ) {

						image.uuid = MathUtils.generateUUID(); // UGH

					}

					if ( ! isRootObject && meta.images[ image.uuid ] === undefined ) {

						var url;

						if ( Array.isArray( image ) ) {

							// process array of images e.g. CubeTexture

							url = [];

							for ( var i = 0, l = image.length; i < l; i ++ ) {

								url.push( ImageUtils.getDataURL( image[ i ] ) );

							}

						} else {

							// process single image

							url = ImageUtils.getDataURL( image );

						}

						meta.images[ image.uuid ] = {
							uuid: image.uuid,
							url: url
						};

					}

					output.image = image.uuid;

				}

				if ( ! isRootObject ) {

					meta.textures[ this.uuid ] = output;

				}

				return output;

			},

			dispose: function () {

				this.dispatchEvent( { type: 'dispose' } );

			},

			transformUv: function ( uv ) {

				if ( this.mapping !== UVMapping ) { return uv; }

				uv.applyMatrix3( this.matrix );

				if ( uv.x < 0 || uv.x > 1 ) {

					switch ( this.wrapS ) {

						case RepeatWrapping:

							uv.x = uv.x - Math.floor( uv.x );
							break;

						case ClampToEdgeWrapping:

							uv.x = uv.x < 0 ? 0 : 1;
							break;

						case MirroredRepeatWrapping:

							if ( Math.abs( Math.floor( uv.x ) % 2 ) === 1 ) {

								uv.x = Math.ceil( uv.x ) - uv.x;

							} else {

								uv.x = uv.x - Math.floor( uv.x );

							}

							break;

					}

				}

				if ( uv.y < 0 || uv.y > 1 ) {

					switch ( this.wrapT ) {

						case RepeatWrapping:

							uv.y = uv.y - Math.floor( uv.y );
							break;

						case ClampToEdgeWrapping:

							uv.y = uv.y < 0 ? 0 : 1;
							break;

						case MirroredRepeatWrapping:

							if ( Math.abs( Math.floor( uv.y ) % 2 ) === 1 ) {

								uv.y = Math.ceil( uv.y ) - uv.y;

							} else {

								uv.y = uv.y - Math.floor( uv.y );

							}

							break;

					}

				}

				if ( this.flipY ) {

					uv.y = 1 - uv.y;

				}

				return uv;

			}

		} );

		Object.defineProperty( Texture.prototype, "needsUpdate", {

			set: function ( value ) {

				if ( value === true ) { this.version ++; }

			}

		} );

		var Vector4 = function Vector4( x, y, z, w ) {
			if ( x === void 0 ) x = 0;
			if ( y === void 0 ) y = 0;
			if ( z === void 0 ) z = 0;
			if ( w === void 0 ) w = 1;


			Object.defineProperty( this, 'isVector4', { value: true } );

			this.x = x;
			this.y = y;
			this.z = z;
			this.w = w;

		};

		var prototypeAccessors$1 = { width: { configurable: true },height: { configurable: true } };

		prototypeAccessors$1.width.get = function () {

			return this.z;

		};

		prototypeAccessors$1.width.set = function ( value ) {

			this.z = value;

		};

		prototypeAccessors$1.height.get = function () {

			return this.w;

		};

		prototypeAccessors$1.height.set = function ( value ) {

			this.w = value;

		};

		Vector4.prototype.set = function set ( x, y, z, w ) {

			this.x = x;
			this.y = y;
			this.z = z;
			this.w = w;

			return this;

		};

		Vector4.prototype.setScalar = function setScalar ( scalar ) {

			this.x = scalar;
			this.y = scalar;
			this.z = scalar;
			this.w = scalar;

			return this;

		};

		Vector4.prototype.setX = function setX ( x ) {

			this.x = x;

			return this;

		};

		Vector4.prototype.setY = function setY ( y ) {

			this.y = y;

			return this;

		};

		Vector4.prototype.setZ = function setZ ( z ) {

			this.z = z;

			return this;

		};

		Vector4.prototype.setW = function setW ( w ) {

			this.w = w;

			return this;

		};

		Vector4.prototype.setComponent = function setComponent ( index, value ) {

			switch ( index ) {

				case 0: this.x = value; break;
				case 1: this.y = value; break;
				case 2: this.z = value; break;
				case 3: this.w = value; break;
				default: throw new Error( 'index is out of range: ' + index );

			}

			return this;

		};

		Vector4.prototype.getComponent = function getComponent ( index ) {

			switch ( index ) {

				case 0: return this.x;
				case 1: return this.y;
				case 2: return this.z;
				case 3: return this.w;
				default: throw new Error( 'index is out of range: ' + index );

			}

		};

		Vector4.prototype.clone = function clone () {

			return new this.constructor( this.x, this.y, this.z, this.w );

		};

		Vector4.prototype.copy = function copy ( v ) {

			this.x = v.x;
			this.y = v.y;
			this.z = v.z;
			this.w = ( v.w !== undefined ) ? v.w : 1;

			return this;

		};

		Vector4.prototype.add = function add ( v, w ) {

			if ( w !== undefined ) {

				console.warn( 'THREE.Vector4: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );
				return this.addVectors( v, w );

			}

			this.x += v.x;
			this.y += v.y;
			this.z += v.z;
			this.w += v.w;

			return this;

		};

		Vector4.prototype.addScalar = function addScalar ( s ) {

			this.x += s;
			this.y += s;
			this.z += s;
			this.w += s;

			return this;

		};

		Vector4.prototype.addVectors = function addVectors ( a, b ) {

			this.x = a.x + b.x;
			this.y = a.y + b.y;
			this.z = a.z + b.z;
			this.w = a.w + b.w;

			return this;

		};

		Vector4.prototype.addScaledVector = function addScaledVector ( v, s ) {

			this.x += v.x * s;
			this.y += v.y * s;
			this.z += v.z * s;
			this.w += v.w * s;

			return this;

		};

		Vector4.prototype.sub = function sub ( v, w ) {

			if ( w !== undefined ) {

				console.warn( 'THREE.Vector4: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );
				return this.subVectors( v, w );

			}

			this.x -= v.x;
			this.y -= v.y;
			this.z -= v.z;
			this.w -= v.w;

			return this;

		};

		Vector4.prototype.subScalar = function subScalar ( s ) {

			this.x -= s;
			this.y -= s;
			this.z -= s;
			this.w -= s;

			return this;

		};

		Vector4.prototype.subVectors = function subVectors ( a, b ) {

			this.x = a.x - b.x;
			this.y = a.y - b.y;
			this.z = a.z - b.z;
			this.w = a.w - b.w;

			return this;

		};

		Vector4.prototype.multiplyScalar = function multiplyScalar ( scalar ) {

			this.x *= scalar;
			this.y *= scalar;
			this.z *= scalar;
			this.w *= scalar;

			return this;

		};

		Vector4.prototype.applyMatrix4 = function applyMatrix4 ( m ) {

			var x = this.x, y = this.y, z = this.z, w = this.w;
			var e = m.elements;

			this.x = e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z + e[ 12 ] * w;
			this.y = e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z + e[ 13 ] * w;
			this.z = e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] * w;
			this.w = e[ 3 ] * x + e[ 7 ] * y + e[ 11 ] * z + e[ 15 ] * w;

			return this;

		};

		Vector4.prototype.divideScalar = function divideScalar ( scalar ) {

			return this.multiplyScalar( 1 / scalar );

		};

		Vector4.prototype.setAxisAngleFromQuaternion = function setAxisAngleFromQuaternion ( q ) {

			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/quaternionToAngle/index.htm

			// q is assumed to be normalized

			this.w = 2 * Math.acos( q.w );

			var s = Math.sqrt( 1 - q.w * q.w );

			if ( s < 0.0001 ) {

				this.x = 1;
				this.y = 0;
				this.z = 0;

			} else {

				this.x = q.x / s;
				this.y = q.y / s;
				this.z = q.z / s;

			}

			return this;

		};

		Vector4.prototype.setAxisAngleFromRotationMatrix = function setAxisAngleFromRotationMatrix ( m ) {

			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToAngle/index.htm

			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)

			var angle, x, y, z; // variables for result
			var epsilon = 0.01,	// margin to allow for rounding errors
				epsilon2 = 0.1,	// margin to distinguish between 0 and 180 degrees

				te = m.elements,

				m11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ],
				m21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ],
				m31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ];

			if ( ( Math.abs( m12 - m21 ) < epsilon ) &&
				     ( Math.abs( m13 - m31 ) < epsilon ) &&
				     ( Math.abs( m23 - m32 ) < epsilon ) ) {

				// singularity found
				// first check for identity matrix which must have +1 for all terms
				// in leading diagonal and zero in other terms

				if ( ( Math.abs( m12 + m21 ) < epsilon2 ) &&
					     ( Math.abs( m13 + m31 ) < epsilon2 ) &&
					     ( Math.abs( m23 + m32 ) < epsilon2 ) &&
					     ( Math.abs( m11 + m22 + m33 - 3 ) < epsilon2 ) ) {

					// this singularity is identity matrix so angle = 0

					this.set( 1, 0, 0, 0 );

					return this; // zero angle, arbitrary axis

				}

				// otherwise this singularity is angle = 180

				angle = Math.PI;

				var xx = ( m11 + 1 ) / 2;
				var yy = ( m22 + 1 ) / 2;
				var zz = ( m33 + 1 ) / 2;
				var xy = ( m12 + m21 ) / 4;
				var xz = ( m13 + m31 ) / 4;
				var yz = ( m23 + m32 ) / 4;

				if ( ( xx > yy ) && ( xx > zz ) ) {

					// m11 is the largest diagonal term

					if ( xx < epsilon ) {

						x = 0;
						y = 0.707106781;
						z = 0.707106781;

					} else {

						x = Math.sqrt( xx );
						y = xy / x;
						z = xz / x;

					}

				} else if ( yy > zz ) {

					// m22 is the largest diagonal term

					if ( yy < epsilon ) {

						x = 0.707106781;
						y = 0;
						z = 0.707106781;

					} else {

						y = Math.sqrt( yy );
						x = xy / y;
						z = yz / y;

					}

				} else {

					// m33 is the largest diagonal term so base result on this

					if ( zz < epsilon ) {

						x = 0.707106781;
						y = 0.707106781;
						z = 0;

					} else {

						z = Math.sqrt( zz );
						x = xz / z;
						y = yz / z;

					}

				}

				this.set( x, y, z, angle );

				return this; // return 180 deg rotation

			}

			// as we have reached here there are no singularities so we can handle normally

			var s = Math.sqrt( ( m32 - m23 ) * ( m32 - m23 ) +
				( m13 - m31 ) * ( m13 - m31 ) +
				( m21 - m12 ) * ( m21 - m12 ) ); // used to normalize

			if ( Math.abs( s ) < 0.001 ) { s = 1; }

			// prevent divide by zero, should not happen if matrix is orthogonal and should be
			// caught by singularity test above, but I've left it in just in case

			this.x = ( m32 - m23 ) / s;
			this.y = ( m13 - m31 ) / s;
			this.z = ( m21 - m12 ) / s;
			this.w = Math.acos( ( m11 + m22 + m33 - 1 ) / 2 );

			return this;

		};

		Vector4.prototype.min = function min ( v ) {

			this.x = Math.min( this.x, v.x );
			this.y = Math.min( this.y, v.y );
			this.z = Math.min( this.z, v.z );
			this.w = Math.min( this.w, v.w );

			return this;

		};

		Vector4.prototype.max = function max ( v ) {

			this.x = Math.max( this.x, v.x );
			this.y = Math.max( this.y, v.y );
			this.z = Math.max( this.z, v.z );
			this.w = Math.max( this.w, v.w );

			return this;

		};

		Vector4.prototype.clamp = function clamp ( min, max ) {

			// assumes min < max, componentwise

			this.x = Math.max( min.x, Math.min( max.x, this.x ) );
			this.y = Math.max( min.y, Math.min( max.y, this.y ) );
			this.z = Math.max( min.z, Math.min( max.z, this.z ) );
			this.w = Math.max( min.w, Math.min( max.w, this.w ) );

			return this;

		};

		Vector4.prototype.clampScalar = function clampScalar ( minVal, maxVal ) {

			this.x = Math.max( minVal, Math.min( maxVal, this.x ) );
			this.y = Math.max( minVal, Math.min( maxVal, this.y ) );
			this.z = Math.max( minVal, Math.min( maxVal, this.z ) );
			this.w = Math.max( minVal, Math.min( maxVal, this.w ) );

			return this;

		};

		Vector4.prototype.clampLength = function clampLength ( min, max ) {

			var length = this.length();

			return this.divideScalar( length || 1 ).multiplyScalar( Math.max( min, Math.min( max, length ) ) );

		};

		Vector4.prototype.floor = function floor () {

			this.x = Math.floor( this.x );
			this.y = Math.floor( this.y );
			this.z = Math.floor( this.z );
			this.w = Math.floor( this.w );

			return this;

		};

		Vector4.prototype.ceil = function ceil () {

			this.x = Math.ceil( this.x );
			this.y = Math.ceil( this.y );
			this.z = Math.ceil( this.z );
			this.w = Math.ceil( this.w );

			return this;

		};

		Vector4.prototype.round = function round () {

			this.x = Math.round( this.x );
			this.y = Math.round( this.y );
			this.z = Math.round( this.z );
			this.w = Math.round( this.w );

			return this;

		};

		Vector4.prototype.roundToZero = function roundToZero () {

			this.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );
			this.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );
			this.z = ( this.z < 0 ) ? Math.ceil( this.z ) : Math.floor( this.z );
			this.w = ( this.w < 0 ) ? Math.ceil( this.w ) : Math.floor( this.w );

			return this;

		};

		Vector4.prototype.negate = function negate () {

			this.x = - this.x;
			this.y = - this.y;
			this.z = - this.z;
			this.w = - this.w;

			return this;

		};

		Vector4.prototype.dot = function dot ( v ) {

			return this.x * v.x + this.y * v.y + this.z * v.z + this.w * v.w;

		};

		Vector4.prototype.lengthSq = function lengthSq () {

			return this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w;

		};

		Vector4.prototype.length = function length () {

			return Math.sqrt( this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w );

		};

		Vector4.prototype.manhattanLength = function manhattanLength () {

			return Math.abs( this.x ) + Math.abs( this.y ) + Math.abs( this.z ) + Math.abs( this.w );

		};

		Vector4.prototype.normalize = function normalize () {

			return this.divideScalar( this.length() || 1 );

		};

		Vector4.prototype.setLength = function setLength ( length ) {

			return this.normalize().multiplyScalar( length );

		};

		Vector4.prototype.lerp = function lerp ( v, alpha ) {

			this.x += ( v.x - this.x ) * alpha;
			this.y += ( v.y - this.y ) * alpha;
			this.z += ( v.z - this.z ) * alpha;
			this.w += ( v.w - this.w ) * alpha;

			return this;

		};

		Vector4.prototype.lerpVectors = function lerpVectors ( v1, v2, alpha ) {

			this.x = v1.x + ( v2.x - v1.x ) * alpha;
			this.y = v1.y + ( v2.y - v1.y ) * alpha;
			this.z = v1.z + ( v2.z - v1.z ) * alpha;
			this.w = v1.w + ( v2.w - v1.w ) * alpha;

			return this;

		};

		Vector4.prototype.equals = function equals ( v ) {

			return ( ( v.x === this.x ) && ( v.y === this.y ) && ( v.z === this.z ) && ( v.w === this.w ) );

		};

		Vector4.prototype.fromArray = function fromArray ( array, offset ) {

			if ( offset === undefined ) { offset = 0; }

			this.x = array[ offset ];
			this.y = array[ offset + 1 ];
			this.z = array[ offset + 2 ];
			this.w = array[ offset + 3 ];

			return this;

		};

		Vector4.prototype.toArray = function toArray ( array, offset ) {

			if ( array === undefined ) { array = []; }
			if ( offset === undefined ) { offset = 0; }

			array[ offset ] = this.x;
			array[ offset + 1 ] = this.y;
			array[ offset + 2 ] = this.z;
			array[ offset + 3 ] = this.w;

			return array;

		};

		Vector4.prototype.fromBufferAttribute = function fromBufferAttribute ( attribute, index, offset ) {

			if ( offset !== undefined ) {

				console.warn( 'THREE.Vector4: offset has been removed from .fromBufferAttribute().' );

			}

			this.x = attribute.getX( index );
			this.y = attribute.getY( index );
			this.z = attribute.getZ( index );
			this.w = attribute.getW( index );

			return this;

		};

		Vector4.prototype.random = function random () {

			this.x = Math.random();
			this.y = Math.random();
			this.z = Math.random();
			this.w = Math.random();

			return this;

		};

		Object.defineProperties( Vector4.prototype, prototypeAccessors$1 );

		/*
		 In options, we can specify:
		 * Texture parameters for an auto-generated target texture
		 * depthBuffer/stencilBuffer: Booleans to indicate if we should generate these buffers
		*/
		function WebGLRenderTarget( width, height, options ) {

			this.width = width;
			this.height = height;

			this.scissor = new Vector4( 0, 0, width, height );
			this.scissorTest = false;

			this.viewport = new Vector4( 0, 0, width, height );

			options = options || {};

			this.texture = new Texture( undefined, options.mapping, options.wrapS, options.wrapT, options.magFilter, options.minFilter, options.format, options.type, options.anisotropy, options.encoding );

			this.texture.image = {};
			this.texture.image.width = width;
			this.texture.image.height = height;

			this.texture.generateMipmaps = options.generateMipmaps !== undefined ? options.generateMipmaps : false;
			this.texture.minFilter = options.minFilter !== undefined ? options.minFilter : LinearFilter;

			this.depthBuffer = options.depthBuffer !== undefined ? options.depthBuffer : true;
			this.stencilBuffer = options.stencilBuffer !== undefined ? options.stencilBuffer : false;
			this.depthTexture = options.depthTexture !== undefined ? options.depthTexture : null;

		}

		WebGLRenderTarget.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {

			constructor: WebGLRenderTarget,

			isWebGLRenderTarget: true,

			setSize: function ( width, height ) {

				if ( this.width !== width || this.height !== height ) {

					this.width = width;
					this.height = height;

					this.texture.image.width = width;
					this.texture.image.height = height;

					this.dispose();

				}

				this.viewport.set( 0, 0, width, height );
				this.scissor.set( 0, 0, width, height );

			},

			clone: function () {

				return new this.constructor().copy( this );

			},

			copy: function ( source ) {

				this.width = source.width;
				this.height = source.height;

				this.viewport.copy( source.viewport );

				this.texture = source.texture.clone();

				this.depthBuffer = source.depthBuffer;
				this.stencilBuffer = source.stencilBuffer;
				this.depthTexture = source.depthTexture;

				return this;

			},

			dispose: function () {

				this.dispatchEvent( { type: 'dispose' } );

			}

		} );

		function WebGLMultisampleRenderTarget( width, height, options ) {

			WebGLRenderTarget.call( this, width, height, options );

			this.samples = 4;

		}

		WebGLMultisampleRenderTarget.prototype = Object.assign( Object.create( WebGLRenderTarget.prototype ), {

			constructor: WebGLMultisampleRenderTarget,

			isWebGLMultisampleRenderTarget: true,

			copy: function ( source ) {

				WebGLRenderTarget.prototype.copy.call( this, source );

				this.samples = source.samples;

				return this;

			}

		} );

		var Quaternion = function Quaternion( x, y, z, w ) {
			if ( x === void 0 ) x = 0;
			if ( y === void 0 ) y = 0;
			if ( z === void 0 ) z = 0;
			if ( w === void 0 ) w = 1;


			Object.defineProperty( this, 'isQuaternion', { value: true } );

			this._x = x;
			this._y = y;
			this._z = z;
			this._w = w;

		};

		var prototypeAccessors$2 = { x: { configurable: true },y: { configurable: true },z: { configurable: true },w: { configurable: true } };

		Quaternion.slerp = function slerp ( qa, qb, qm, t ) {

			return qm.copy( qa ).slerp( qb, t );

		};

		Quaternion.slerpFlat = function slerpFlat ( dst, dstOffset, src0, srcOffset0, src1, srcOffset1, t ) {

			// fuzz-free, array-based Quaternion SLERP operation

			var x0 = src0[ srcOffset0 + 0 ],
				y0 = src0[ srcOffset0 + 1 ],
				z0 = src0[ srcOffset0 + 2 ],
				w0 = src0[ srcOffset0 + 3 ];

			var x1 = src1[ srcOffset1 + 0 ],
				y1 = src1[ srcOffset1 + 1 ],
				z1 = src1[ srcOffset1 + 2 ],
				w1 = src1[ srcOffset1 + 3 ];

			if ( w0 !== w1 || x0 !== x1 || y0 !== y1 || z0 !== z1 ) {

				var s = 1 - t;
				var cos = x0 * x1 + y0 * y1 + z0 * z1 + w0 * w1,
					dir = ( cos >= 0 ? 1 : - 1 ),
					sqrSin = 1 - cos * cos;

				// Skip the Slerp for tiny steps to avoid numeric problems:
				if ( sqrSin > Number.EPSILON ) {

					var sin = Math.sqrt( sqrSin ),
						len = Math.atan2( sin, cos * dir );

					s = Math.sin( s * len ) / sin;
					t = Math.sin( t * len ) / sin;

				}

				var tDir = t * dir;

				x0 = x0 * s + x1 * tDir;
				y0 = y0 * s + y1 * tDir;
				z0 = z0 * s + z1 * tDir;
				w0 = w0 * s + w1 * tDir;

				// Normalize in case we just did a lerp:
				if ( s === 1 - t ) {

					var f = 1 / Math.sqrt( x0 * x0 + y0 * y0 + z0 * z0 + w0 * w0 );

					x0 *= f;
					y0 *= f;
					z0 *= f;
					w0 *= f;

				}

			}

			dst[ dstOffset ] = x0;
			dst[ dstOffset + 1 ] = y0;
			dst[ dstOffset + 2 ] = z0;
			dst[ dstOffset + 3 ] = w0;

		};

		Quaternion.multiplyQuaternionsFlat = function multiplyQuaternionsFlat ( dst, dstOffset, src0, srcOffset0, src1, srcOffset1 ) {

			var x0 = src0[ srcOffset0 ];
			var y0 = src0[ srcOffset0 + 1 ];
			var z0 = src0[ srcOffset0 + 2 ];
			var w0 = src0[ srcOffset0 + 3 ];

			var x1 = src1[ srcOffset1 ];
			var y1 = src1[ srcOffset1 + 1 ];
			var z1 = src1[ srcOffset1 + 2 ];
			var w1 = src1[ srcOffset1 + 3 ];

			dst[ dstOffset ] = x0 * w1 + w0 * x1 + y0 * z1 - z0 * y1;
			dst[ dstOffset + 1 ] = y0 * w1 + w0 * y1 + z0 * x1 - x0 * z1;
			dst[ dstOffset + 2 ] = z0 * w1 + w0 * z1 + x0 * y1 - y0 * x1;
			dst[ dstOffset + 3 ] = w0 * w1 - x0 * x1 - y0 * y1 - z0 * z1;

			return dst;

		};

		prototypeAccessors$2.x.get = function () {

			return this._x;

		};

		prototypeAccessors$2.x.set = function ( value ) {

			this._x = value;
			this._onChangeCallback();

		};

		prototypeAccessors$2.y.get = function () {

			return this._y;

		};

		prototypeAccessors$2.y.set = function ( value ) {

			this._y = value;
			this._onChangeCallback();

		};

		prototypeAccessors$2.z.get = function () {

			return this._z;

		};

		prototypeAccessors$2.z.set = function ( value ) {

			this._z = value;
			this._onChangeCallback();

		};

		prototypeAccessors$2.w.get = function () {

			return this._w;

		};

		prototypeAccessors$2.w.set = function ( value ) {

			this._w = value;
			this._onChangeCallback();

		};

		Quaternion.prototype.set = function set ( x, y, z, w ) {

			this._x = x;
			this._y = y;
			this._z = z;
			this._w = w;

			this._onChangeCallback();

			return this;

		};

		Quaternion.prototype.clone = function clone () {

			return new this.constructor( this._x, this._y, this._z, this._w );

		};

		Quaternion.prototype.copy = function copy ( quaternion ) {

			this._x = quaternion.x;
			this._y = quaternion.y;
			this._z = quaternion.z;
			this._w = quaternion.w;

			this._onChangeCallback();

			return this;

		};

		Quaternion.prototype.setFromEuler = function setFromEuler ( euler, update ) {

			if ( ! ( euler && euler.isEuler ) ) {

				throw new Error( 'THREE.Quaternion: .setFromEuler() now expects an Euler rotation rather than a Vector3 and order.' );

			}

			var x = euler._x, y = euler._y, z = euler._z, order = euler._order;

			// http://www.mathworks.com/matlabcentral/fileexchange/
			// 20696-function-to-convert-between-dcm-euler-angles-quaternions-and-euler-vectors/
			//content/SpinCalc.m

			var cos = Math.cos;
			var sin = Math.sin;

			var c1 = cos( x / 2 );
			var c2 = cos( y / 2 );
			var c3 = cos( z / 2 );

			var s1 = sin( x / 2 );
			var s2 = sin( y / 2 );
			var s3 = sin( z / 2 );

			switch ( order ) {

				case 'XYZ':
					this._x = s1 * c2 * c3 + c1 * s2 * s3;
					this._y = c1 * s2 * c3 - s1 * c2 * s3;
					this._z = c1 * c2 * s3 + s1 * s2 * c3;
					this._w = c1 * c2 * c3 - s1 * s2 * s3;
					break;

				case 'YXZ':
					this._x = s1 * c2 * c3 + c1 * s2 * s3;
					this._y = c1 * s2 * c3 - s1 * c2 * s3;
					this._z = c1 * c2 * s3 - s1 * s2 * c3;
					this._w = c1 * c2 * c3 + s1 * s2 * s3;
					break;

				case 'ZXY':
					this._x = s1 * c2 * c3 - c1 * s2 * s3;
					this._y = c1 * s2 * c3 + s1 * c2 * s3;
					this._z = c1 * c2 * s3 + s1 * s2 * c3;
					this._w = c1 * c2 * c3 - s1 * s2 * s3;
					break;

				case 'ZYX':
					this._x = s1 * c2 * c3 - c1 * s2 * s3;
					this._y = c1 * s2 * c3 + s1 * c2 * s3;
					this._z = c1 * c2 * s3 - s1 * s2 * c3;
					this._w = c1 * c2 * c3 + s1 * s2 * s3;
					break;

				case 'YZX':
					this._x = s1 * c2 * c3 + c1 * s2 * s3;
					this._y = c1 * s2 * c3 + s1 * c2 * s3;
					this._z = c1 * c2 * s3 - s1 * s2 * c3;
					this._w = c1 * c2 * c3 - s1 * s2 * s3;
					break;

				case 'XZY':
					this._x = s1 * c2 * c3 - c1 * s2 * s3;
					this._y = c1 * s2 * c3 - s1 * c2 * s3;
					this._z = c1 * c2 * s3 + s1 * s2 * c3;
					this._w = c1 * c2 * c3 + s1 * s2 * s3;
					break;

				default:
					console.warn( 'THREE.Quaternion: .setFromEuler() encountered an unknown order: ' + order );

			}

			if ( update !== false ) { this._onChangeCallback(); }

			return this;

		};

		Quaternion.prototype.setFromAxisAngle = function setFromAxisAngle ( axis, angle ) {

			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/angleToQuaternion/index.htm

			// assumes axis is normalized

			var halfAngle = angle / 2, s = Math.sin( halfAngle );

			this._x = axis.x * s;
			this._y = axis.y * s;
			this._z = axis.z * s;
			this._w = Math.cos( halfAngle );

			this._onChangeCallback();

			return this;

		};

		Quaternion.prototype.setFromRotationMatrix = function setFromRotationMatrix ( m ) {

			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToQuaternion/index.htm

			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)

			var te = m.elements,

				m11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ],
				m21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ],
				m31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ],

				trace = m11 + m22 + m33;

			if ( trace > 0 ) {

				var s = 0.5 / Math.sqrt( trace + 1.0 );

				this._w = 0.25 / s;
				this._x = ( m32 - m23 ) * s;
				this._y = ( m13 - m31 ) * s;
				this._z = ( m21 - m12 ) * s;

			} else if ( m11 > m22 && m11 > m33 ) {

				var s$1 = 2.0 * Math.sqrt( 1.0 + m11 - m22 - m33 );

				this._w = ( m32 - m23 ) / s$1;
				this._x = 0.25 * s$1;
				this._y = ( m12 + m21 ) / s$1;
				this._z = ( m13 + m31 ) / s$1;

			} else if ( m22 > m33 ) {

				var s$2 = 2.0 * Math.sqrt( 1.0 + m22 - m11 - m33 );

				this._w = ( m13 - m31 ) / s$2;
				this._x = ( m12 + m21 ) / s$2;
				this._y = 0.25 * s$2;
				this._z = ( m23 + m32 ) / s$2;

			} else {

				var s$3 = 2.0 * Math.sqrt( 1.0 + m33 - m11 - m22 );

				this._w = ( m21 - m12 ) / s$3;
				this._x = ( m13 + m31 ) / s$3;
				this._y = ( m23 + m32 ) / s$3;
				this._z = 0.25 * s$3;

			}

			this._onChangeCallback();

			return this;

		};

		Quaternion.prototype.setFromUnitVectors = function setFromUnitVectors ( vFrom, vTo ) {

			// assumes direction vectors vFrom and vTo are normalized

			var EPS = 0.000001;

			var r = vFrom.dot( vTo ) + 1;

			if ( r < EPS ) {

				r = 0;

				if ( Math.abs( vFrom.x ) > Math.abs( vFrom.z ) ) {

					this._x = - vFrom.y;
					this._y = vFrom.x;
					this._z = 0;
					this._w = r;

				} else {

					this._x = 0;
					this._y = - vFrom.z;
					this._z = vFrom.y;
					this._w = r;

				}

			} else {

				// crossVectors( vFrom, vTo ); // inlined to avoid cyclic dependency on Vector3

				this._x = vFrom.y * vTo.z - vFrom.z * vTo.y;
				this._y = vFrom.z * vTo.x - vFrom.x * vTo.z;
				this._z = vFrom.x * vTo.y - vFrom.y * vTo.x;
				this._w = r;

			}

			return this.normalize();

		};

		Quaternion.prototype.angleTo = function angleTo ( q ) {

			return 2 * Math.acos( Math.abs( MathUtils.clamp( this.dot( q ), - 1, 1 ) ) );

		};

		Quaternion.prototype.rotateTowards = function rotateTowards ( q, step ) {

			var angle = this.angleTo( q );

			if ( angle === 0 ) { return this; }

			var t = Math.min( 1, step / angle );

			this.slerp( q, t );

			return this;

		};

		Quaternion.prototype.identity = function identity () {

			return this.set( 0, 0, 0, 1 );

		};

		Quaternion.prototype.inverse = function inverse () {

			// quaternion is assumed to have unit length

			return this.conjugate();

		};

		Quaternion.prototype.conjugate = function conjugate () {

			this._x *= - 1;
			this._y *= - 1;
			this._z *= - 1;

			this._onChangeCallback();

			return this;

		};

		Quaternion.prototype.dot = function dot ( v ) {

			return this._x * v._x + this._y * v._y + this._z * v._z + this._w * v._w;

		};

		Quaternion.prototype.lengthSq = function lengthSq () {

			return this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w;

		};

		Quaternion.prototype.length = function length () {

			return Math.sqrt( this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w );

		};

		Quaternion.prototype.normalize = function normalize () {

			var l = this.length();

			if ( l === 0 ) {

				this._x = 0;
				this._y = 0;
				this._z = 0;
				this._w = 1;

			} else {

				l = 1 / l;

				this._x = this._x * l;
				this._y = this._y * l;
				this._z = this._z * l;
				this._w = this._w * l;

			}

			this._onChangeCallback();

			return this;

		};

		Quaternion.prototype.multiply = function multiply ( q, p ) {

			if ( p !== undefined ) {

				console.warn( 'THREE.Quaternion: .multiply() now only accepts one argument. Use .multiplyQuaternions( a, b ) instead.' );
				return this.multiplyQuaternions( q, p );

			}

			return this.multiplyQuaternions( this, q );

		};

		Quaternion.prototype.premultiply = function premultiply ( q ) {

			return this.multiplyQuaternions( q, this );

		};

		Quaternion.prototype.multiplyQuaternions = function multiplyQuaternions ( a, b ) {

			// from http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/code/index.htm

			var qax = a._x, qay = a._y, qaz = a._z, qaw = a._w;
			var qbx = b._x, qby = b._y, qbz = b._z, qbw = b._w;

			this._x = qax * qbw + qaw * qbx + qay * qbz - qaz * qby;
			this._y = qay * qbw + qaw * qby + qaz * qbx - qax * qbz;
			this._z = qaz * qbw + qaw * qbz + qax * qby - qay * qbx;
			this._w = qaw * qbw - qax * qbx - qay * qby - qaz * qbz;

			this._onChangeCallback();

			return this;

		};

		Quaternion.prototype.slerp = function slerp ( qb, t ) {

			if ( t === 0 ) { return this; }
			if ( t === 1 ) { return this.copy( qb ); }

			var x = this._x, y = this._y, z = this._z, w = this._w;

			// http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/slerp/

			var cosHalfTheta = w * qb._w + x * qb._x + y * qb._y + z * qb._z;

			if ( cosHalfTheta < 0 ) {

				this._w = - qb._w;
				this._x = - qb._x;
				this._y = - qb._y;
				this._z = - qb._z;

				cosHalfTheta = - cosHalfTheta;

			} else {

				this.copy( qb );

			}

			if ( cosHalfTheta >= 1.0 ) {

				this._w = w;
				this._x = x;
				this._y = y;
				this._z = z;

				return this;

			}

			var sqrSinHalfTheta = 1.0 - cosHalfTheta * cosHalfTheta;

			if ( sqrSinHalfTheta <= Number.EPSILON ) {

				var s = 1 - t;
				this._w = s * w + t * this._w;
				this._x = s * x + t * this._x;
				this._y = s * y + t * this._y;
				this._z = s * z + t * this._z;

				this.normalize();
				this._onChangeCallback();

				return this;

			}

			var sinHalfTheta = Math.sqrt( sqrSinHalfTheta );
			var halfTheta = Math.atan2( sinHalfTheta, cosHalfTheta );
			var ratioA = Math.sin( ( 1 - t ) * halfTheta ) / sinHalfTheta,
				ratioB = Math.sin( t * halfTheta ) / sinHalfTheta;

			this._w = ( w * ratioA + this._w * ratioB );
			this._x = ( x * ratioA + this._x * ratioB );
			this._y = ( y * ratioA + this._y * ratioB );
			this._z = ( z * ratioA + this._z * ratioB );

			this._onChangeCallback();

			return this;

		};

		Quaternion.prototype.equals = function equals ( quaternion ) {

			return ( quaternion._x === this._x ) && ( quaternion._y === this._y ) && ( quaternion._z === this._z ) && ( quaternion._w === this._w );

		};

		Quaternion.prototype.fromArray = function fromArray ( array, offset ) {

			if ( offset === undefined ) { offset = 0; }

			this._x = array[ offset ];
			this._y = array[ offset + 1 ];
			this._z = array[ offset + 2 ];
			this._w = array[ offset + 3 ];

			this._onChangeCallback();

			return this;

		};

		Quaternion.prototype.toArray = function toArray ( array, offset ) {

			if ( array === undefined ) { array = []; }
			if ( offset === undefined ) { offset = 0; }

			array[ offset ] = this._x;
			array[ offset + 1 ] = this._y;
			array[ offset + 2 ] = this._z;
			array[ offset + 3 ] = this._w;

			return array;

		};

		Quaternion.prototype.fromBufferAttribute = function fromBufferAttribute ( attribute, index ) {

			this._x = attribute.getX( index );
			this._y = attribute.getY( index );
			this._z = attribute.getZ( index );
			this._w = attribute.getW( index );

			return this;

		};

		Quaternion.prototype._onChange = function _onChange ( callback ) {

			this._onChangeCallback = callback;

			return this;

		};

		Quaternion.prototype._onChangeCallback = function _onChangeCallback () {};

		Object.defineProperties( Quaternion.prototype, prototypeAccessors$2 );

		var Vector3 = function Vector3( x, y, z ) {
			if ( x === void 0 ) x = 0;
			if ( y === void 0 ) y = 0;
			if ( z === void 0 ) z = 0;


			Object.defineProperty( this, 'isVector3', { value: true } );

			this.x = x;
			this.y = y;
			this.z = z;

		};

		Vector3.prototype.set = function set ( x, y, z ) {

			if ( z === undefined ) { z = this.z; } // sprite.scale.set(x,y)

			this.x = x;
			this.y = y;
			this.z = z;

			return this;

		};

		Vector3.prototype.setScalar = function setScalar ( scalar ) {

			this.x = scalar;
			this.y = scalar;
			this.z = scalar;

			return this;

		};

		Vector3.prototype.setX = function setX ( x ) {

			this.x = x;

			return this;

		};

		Vector3.prototype.setY = function setY ( y ) {

			this.y = y;

			return this;

		};

		Vector3.prototype.setZ = function setZ ( z ) {

			this.z = z;

			return this;

		};

		Vector3.prototype.setComponent = function setComponent ( index, value ) {

			switch ( index ) {

				case 0: this.x = value; break;
				case 1: this.y = value; break;
				case 2: this.z = value; break;
				default: throw new Error( 'index is out of range: ' + index );

			}

			return this;

		};

		Vector3.prototype.getComponent = function getComponent ( index ) {

			switch ( index ) {

				case 0: return this.x;
				case 1: return this.y;
				case 2: return this.z;
				default: throw new Error( 'index is out of range: ' + index );

			}

		};

		Vector3.prototype.clone = function clone () {

			return new this.constructor( this.x, this.y, this.z );

		};

		Vector3.prototype.copy = function copy ( v ) {

			this.x = v.x;
			this.y = v.y;
			this.z = v.z;

			return this;

		};

		Vector3.prototype.add = function add ( v, w ) {

			if ( w !== undefined ) {

				console.warn( 'THREE.Vector3: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );
				return this.addVectors( v, w );

			}

			this.x += v.x;
			this.y += v.y;
			this.z += v.z;

			return this;

		};

		Vector3.prototype.addScalar = function addScalar ( s ) {

			this.x += s;
			this.y += s;
			this.z += s;

			return this;

		};

		Vector3.prototype.addVectors = function addVectors ( a, b ) {

			this.x = a.x + b.x;
			this.y = a.y + b.y;
			this.z = a.z + b.z;

			return this;

		};

		Vector3.prototype.addScaledVector = function addScaledVector ( v, s ) {

			this.x += v.x * s;
			this.y += v.y * s;
			this.z += v.z * s;

			return this;

		};

		Vector3.prototype.sub = function sub ( v, w ) {

			if ( w !== undefined ) {

				console.warn( 'THREE.Vector3: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );
				return this.subVectors( v, w );

			}

			this.x -= v.x;
			this.y -= v.y;
			this.z -= v.z;

			return this;

		};

		Vector3.prototype.subScalar = function subScalar ( s ) {

			this.x -= s;
			this.y -= s;
			this.z -= s;

			return this;

		};

		Vector3.prototype.subVectors = function subVectors ( a, b ) {

			this.x = a.x - b.x;
			this.y = a.y - b.y;
			this.z = a.z - b.z;

			return this;

		};

		Vector3.prototype.multiply = function multiply ( v, w ) {

			if ( w !== undefined ) {

				console.warn( 'THREE.Vector3: .multiply() now only accepts one argument. Use .multiplyVectors( a, b ) instead.' );
				return this.multiplyVectors( v, w );

			}

			this.x *= v.x;
			this.y *= v.y;
			this.z *= v.z;

			return this;

		};

		Vector3.prototype.multiplyScalar = function multiplyScalar ( scalar ) {

			this.x *= scalar;
			this.y *= scalar;
			this.z *= scalar;

			return this;

		};

		Vector3.prototype.multiplyVectors = function multiplyVectors ( a, b ) {

			this.x = a.x * b.x;
			this.y = a.y * b.y;
			this.z = a.z * b.z;

			return this;

		};

		Vector3.prototype.applyEuler = function applyEuler ( euler ) {

			if ( ! ( euler && euler.isEuler ) ) {

				console.error( 'THREE.Vector3: .applyEuler() now expects an Euler rotation rather than a Vector3 and order.' );

			}

			return this.applyQuaternion( _quaternion.setFromEuler( euler ) );

		};

		Vector3.prototype.applyAxisAngle = function applyAxisAngle ( axis, angle ) {

			return this.applyQuaternion( _quaternion.setFromAxisAngle( axis, angle ) );

		};

		Vector3.prototype.applyMatrix3 = function applyMatrix3 ( m ) {

			var x = this.x, y = this.y, z = this.z;
			var e = m.elements;

			this.x = e[ 0 ] * x + e[ 3 ] * y + e[ 6 ] * z;
			this.y = e[ 1 ] * x + e[ 4 ] * y + e[ 7 ] * z;
			this.z = e[ 2 ] * x + e[ 5 ] * y + e[ 8 ] * z;

			return this;

		};

		Vector3.prototype.applyNormalMatrix = function applyNormalMatrix ( m ) {

			return this.applyMatrix3( m ).normalize();

		};

		Vector3.prototype.applyMatrix4 = function applyMatrix4 ( m ) {

			var x = this.x, y = this.y, z = this.z;
			var e = m.elements;

			var w = 1 / ( e[ 3 ] * x + e[ 7 ] * y + e[ 11 ] * z + e[ 15 ] );

			this.x = ( e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z + e[ 12 ] ) * w;
			this.y = ( e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z + e[ 13 ] ) * w;
			this.z = ( e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] ) * w;

			return this;

		};

		Vector3.prototype.applyQuaternion = function applyQuaternion ( q ) {

			var x = this.x, y = this.y, z = this.z;
			var qx = q.x, qy = q.y, qz = q.z, qw = q.w;

			// calculate quat * vector

			var ix = qw * x + qy * z - qz * y;
			var iy = qw * y + qz * x - qx * z;
			var iz = qw * z + qx * y - qy * x;
			var iw = - qx * x - qy * y - qz * z;

			// calculate result * inverse quat

			this.x = ix * qw + iw * - qx + iy * - qz - iz * - qy;
			this.y = iy * qw + iw * - qy + iz * - qx - ix * - qz;
			this.z = iz * qw + iw * - qz + ix * - qy - iy * - qx;

			return this;

		};

		Vector3.prototype.project = function project ( camera ) {

			return this.applyMatrix4( camera.matrixWorldInverse ).applyMatrix4( camera.projectionMatrix );

		};

		Vector3.prototype.unproject = function unproject ( camera ) {

			return this.applyMatrix4( camera.projectionMatrixInverse ).applyMatrix4( camera.matrixWorld );

		};

		Vector3.prototype.transformDirection = function transformDirection ( m ) {

			// input: THREE.Matrix4 affine matrix
			// vector interpreted as a direction

			var x = this.x, y = this.y, z = this.z;
			var e = m.elements;

			this.x = e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z;
			this.y = e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z;
			this.z = e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z;

			return this.normalize();

		};

		Vector3.prototype.divide = function divide ( v ) {

			this.x /= v.x;
			this.y /= v.y;
			this.z /= v.z;

			return this;

		};

		Vector3.prototype.divideScalar = function divideScalar ( scalar ) {

			return this.multiplyScalar( 1 / scalar );

		};

		Vector3.prototype.min = function min ( v ) {

			this.x = Math.min( this.x, v.x );
			this.y = Math.min( this.y, v.y );
			this.z = Math.min( this.z, v.z );

			return this;

		};

		Vector3.prototype.max = function max ( v ) {

			this.x = Math.max( this.x, v.x );
			this.y = Math.max( this.y, v.y );
			this.z = Math.max( this.z, v.z );

			return this;

		};

		Vector3.prototype.clamp = function clamp ( min, max ) {

			// assumes min < max, componentwise

			this.x = Math.max( min.x, Math.min( max.x, this.x ) );
			this.y = Math.max( min.y, Math.min( max.y, this.y ) );
			this.z = Math.max( min.z, Math.min( max.z, this.z ) );

			return this;

		};

		Vector3.prototype.clampScalar = function clampScalar ( minVal, maxVal ) {

			this.x = Math.max( minVal, Math.min( maxVal, this.x ) );
			this.y = Math.max( minVal, Math.min( maxVal, this.y ) );
			this.z = Math.max( minVal, Math.min( maxVal, this.z ) );

			return this;

		};

		Vector3.prototype.clampLength = function clampLength ( min, max ) {

			var length = this.length();

			return this.divideScalar( length || 1 ).multiplyScalar( Math.max( min, Math.min( max, length ) ) );

		};

		Vector3.prototype.floor = function floor () {

			this.x = Math.floor( this.x );
			this.y = Math.floor( this.y );
			this.z = Math.floor( this.z );

			return this;

		};

		Vector3.prototype.ceil = function ceil () {

			this.x = Math.ceil( this.x );
			this.y = Math.ceil( this.y );
			this.z = Math.ceil( this.z );

			return this;

		};

		Vector3.prototype.round = function round () {

			this.x = Math.round( this.x );
			this.y = Math.round( this.y );
			this.z = Math.round( this.z );

			return this;

		};

		Vector3.prototype.roundToZero = function roundToZero () {

			this.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );
			this.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );
			this.z = ( this.z < 0 ) ? Math.ceil( this.z ) : Math.floor( this.z );

			return this;

		};

		Vector3.prototype.negate = function negate () {

			this.x = - this.x;
			this.y = - this.y;
			this.z = - this.z;

			return this;

		};

		Vector3.prototype.dot = function dot ( v ) {

			return this.x * v.x + this.y * v.y + this.z * v.z;

		};

		// TODO lengthSquared?

		Vector3.prototype.lengthSq = function lengthSq () {

			return this.x * this.x + this.y * this.y + this.z * this.z;

		};

		Vector3.prototype.length = function length () {

			return Math.sqrt( this.x * this.x + this.y * this.y + this.z * this.z );

		};

		Vector3.prototype.manhattanLength = function manhattanLength () {

			return Math.abs( this.x ) + Math.abs( this.y ) + Math.abs( this.z );

		};

		Vector3.prototype.normalize = function normalize () {

			return this.divideScalar( this.length() || 1 );

		};

		Vector3.prototype.setLength = function setLength ( length ) {

			return this.normalize().multiplyScalar( length );

		};

		Vector3.prototype.lerp = function lerp ( v, alpha ) {

			this.x += ( v.x - this.x ) * alpha;
			this.y += ( v.y - this.y ) * alpha;
			this.z += ( v.z - this.z ) * alpha;

			return this;

		};

		Vector3.prototype.lerpVectors = function lerpVectors ( v1, v2, alpha ) {

			this.x = v1.x + ( v2.x - v1.x ) * alpha;
			this.y = v1.y + ( v2.y - v1.y ) * alpha;
			this.z = v1.z + ( v2.z - v1.z ) * alpha;

			return this;

		};

		Vector3.prototype.cross = function cross ( v, w ) {

			if ( w !== undefined ) {

				console.warn( 'THREE.Vector3: .cross() now only accepts one argument. Use .crossVectors( a, b ) instead.' );
				return this.crossVectors( v, w );

			}

			return this.crossVectors( this, v );

		};

		Vector3.prototype.crossVectors = function crossVectors ( a, b ) {

			var ax = a.x, ay = a.y, az = a.z;
			var bx = b.x, by = b.y, bz = b.z;

			this.x = ay * bz - az * by;
			this.y = az * bx - ax * bz;
			this.z = ax * by - ay * bx;

			return this;

		};

		Vector3.prototype.projectOnVector = function projectOnVector ( v ) {

			var denominator = v.lengthSq();

			if ( denominator === 0 ) { return this.set( 0, 0, 0 ); }

			var scalar = v.dot( this ) / denominator;

			return this.copy( v ).multiplyScalar( scalar );

		};

		Vector3.prototype.projectOnPlane = function projectOnPlane ( planeNormal ) {

			_vector.copy( this ).projectOnVector( planeNormal );

			return this.sub( _vector );

		};

		Vector3.prototype.reflect = function reflect ( normal ) {

			// reflect incident vector off plane orthogonal to normal
			// normal is assumed to have unit length

			return this.sub( _vector.copy( normal ).multiplyScalar( 2 * this.dot( normal ) ) );

		};

		Vector3.prototype.angleTo = function angleTo ( v ) {

			var denominator = Math.sqrt( this.lengthSq() * v.lengthSq() );

			if ( denominator === 0 ) { return Math.PI / 2; }

			var theta = this.dot( v ) / denominator;

			// clamp, to handle numerical problems

			return Math.acos( MathUtils.clamp( theta, - 1, 1 ) );

		};

		Vector3.prototype.distanceTo = function distanceTo ( v ) {

			return Math.sqrt( this.distanceToSquared( v ) );

		};

		Vector3.prototype.distanceToSquared = function distanceToSquared ( v ) {

			var dx = this.x - v.x, dy = this.y - v.y, dz = this.z - v.z;

			return dx * dx + dy * dy + dz * dz;

		};

		Vector3.prototype.manhattanDistanceTo = function manhattanDistanceTo ( v ) {

			return Math.abs( this.x - v.x ) + Math.abs( this.y - v.y ) + Math.abs( this.z - v.z );

		};

		Vector3.prototype.setFromSpherical = function setFromSpherical ( s ) {

			return this.setFromSphericalCoords( s.radius, s.phi, s.theta );

		};

		Vector3.prototype.setFromSphericalCoords = function setFromSphericalCoords ( radius, phi, theta ) {

			var sinPhiRadius = Math.sin( phi ) * radius;

			this.x = sinPhiRadius * Math.sin( theta );
			this.y = Math.cos( phi ) * radius;
			this.z = sinPhiRadius * Math.cos( theta );

			return this;

		};

		Vector3.prototype.setFromCylindrical = function setFromCylindrical ( c ) {

			return this.setFromCylindricalCoords( c.radius, c.theta, c.y );

		};

		Vector3.prototype.setFromCylindricalCoords = function setFromCylindricalCoords ( radius, theta, y ) {

			this.x = radius * Math.sin( theta );
			this.y = y;
			this.z = radius * Math.cos( theta );

			return this;

		};

		Vector3.prototype.setFromMatrixPosition = function setFromMatrixPosition ( m ) {

			var e = m.elements;

			this.x = e[ 12 ];
			this.y = e[ 13 ];
			this.z = e[ 14 ];

			return this;

		};

		Vector3.prototype.setFromMatrixScale = function setFromMatrixScale ( m ) {

			var sx = this.setFromMatrixColumn( m, 0 ).length();
			var sy = this.setFromMatrixColumn( m, 1 ).length();
			var sz = this.setFromMatrixColumn( m, 2 ).length();

			this.x = sx;
			this.y = sy;
			this.z = sz;

			return this;

		};

		Vector3.prototype.setFromMatrixColumn = function setFromMatrixColumn ( m, index ) {

			return this.fromArray( m.elements, index * 4 );

		};

		Vector3.prototype.setFromMatrix3Column = function setFromMatrix3Column ( m, index ) {

			return this.fromArray( m.elements, index * 3 );

		};

		Vector3.prototype.equals = function equals ( v ) {

			return ( ( v.x === this.x ) && ( v.y === this.y ) && ( v.z === this.z ) );

		};

		Vector3.prototype.fromArray = function fromArray ( array, offset ) {

			if ( offset === undefined ) { offset = 0; }

			this.x = array[ offset ];
			this.y = array[ offset + 1 ];
			this.z = array[ offset + 2 ];

			return this;

		};

		Vector3.prototype.toArray = function toArray ( array, offset ) {

			if ( array === undefined ) { array = []; }
			if ( offset === undefined ) { offset = 0; }

			array[ offset ] = this.x;
			array[ offset + 1 ] = this.y;
			array[ offset + 2 ] = this.z;

			return array;

		};

		Vector3.prototype.fromBufferAttribute = function fromBufferAttribute ( attribute, index, offset ) {

			if ( offset !== undefined ) {

				console.warn( 'THREE.Vector3: offset has been removed from .fromBufferAttribute().' );

			}

			this.x = attribute.getX( index );
			this.y = attribute.getY( index );
			this.z = attribute.getZ( index );

			return this;

		};

		Vector3.prototype.random = function random () {

			this.x = Math.random();
			this.y = Math.random();
			this.z = Math.random();

			return this;

		};

		var _vector = new Vector3();
		var _quaternion = new Quaternion();

		var Box3 = function Box3( min, max ) {

			Object.defineProperty( this, 'isBox3', { value: true } );

			this.min = ( min !== undefined ) ? min : new Vector3( + Infinity, + Infinity, + Infinity );
			this.max = ( max !== undefined ) ? max : new Vector3( - Infinity, - Infinity, - Infinity );

		};

		Box3.prototype.set = function set ( min, max ) {

			this.min.copy( min );
			this.max.copy( max );

			return this;

		};

		Box3.prototype.setFromArray = function setFromArray ( array ) {

			var minX = + Infinity;
			var minY = + Infinity;
			var minZ = + Infinity;

			var maxX = - Infinity;
			var maxY = - Infinity;
			var maxZ = - Infinity;

			for ( var i = 0, l = array.length; i < l; i += 3 ) {

				var x = array[ i ];
				var y = array[ i + 1 ];
				var z = array[ i + 2 ];

				if ( x < minX ) { minX = x; }
				if ( y < minY ) { minY = y; }
				if ( z < minZ ) { minZ = z; }

				if ( x > maxX ) { maxX = x; }
				if ( y > maxY ) { maxY = y; }
				if ( z > maxZ ) { maxZ = z; }

			}

			this.min.set( minX, minY, minZ );
			this.max.set( maxX, maxY, maxZ );

			return this;

		};

		Box3.prototype.setFromBufferAttribute = function setFromBufferAttribute ( attribute ) {

			var minX = + Infinity;
			var minY = + Infinity;
			var minZ = + Infinity;

			var maxX = - Infinity;
			var maxY = - Infinity;
			var maxZ = - Infinity;

			for ( var i = 0, l = attribute.count; i < l; i ++ ) {

				var x = attribute.getX( i );
				var y = attribute.getY( i );
				var z = attribute.getZ( i );

				if ( x < minX ) { minX = x; }
				if ( y < minY ) { minY = y; }
				if ( z < minZ ) { minZ = z; }

				if ( x > maxX ) { maxX = x; }
				if ( y > maxY ) { maxY = y; }
				if ( z > maxZ ) { maxZ = z; }

			}

			this.min.set( minX, minY, minZ );
			this.max.set( maxX, maxY, maxZ );

			return this;

		};

		Box3.prototype.setFromPoints = function setFromPoints ( points ) {

			this.makeEmpty();

			for ( var i = 0, il = points.length; i < il; i ++ ) {

				this.expandByPoint( points[ i ] );

			}

			return this;

		};

		Box3.prototype.setFromCenterAndSize = function setFromCenterAndSize ( center, size ) {

			var halfSize = _vector$1.copy( size ).multiplyScalar( 0.5 );

			this.min.copy( center ).sub( halfSize );
			this.max.copy( center ).add( halfSize );

			return this;

		};

		Box3.prototype.setFromObject = function setFromObject ( object ) {

			this.makeEmpty();

			return this.expandByObject( object );

		};

		Box3.prototype.clone = function clone () {

			return new this.constructor().copy( this );

		};

		Box3.prototype.copy = function copy ( box ) {

			this.min.copy( box.min );
			this.max.copy( box.max );

			return this;

		};

		Box3.prototype.makeEmpty = function makeEmpty () {

			this.min.x = this.min.y = this.min.z = + Infinity;
			this.max.x = this.max.y = this.max.z = - Infinity;

			return this;

		};

		Box3.prototype.isEmpty = function isEmpty () {

			// this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes

			return ( this.max.x < this.min.x ) || ( this.max.y < this.min.y ) || ( this.max.z < this.min.z );

		};

		Box3.prototype.getCenter = function getCenter ( target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Box3: .getCenter() target is now required' );
				target = new Vector3();

			}

			return this.isEmpty() ? target.set( 0, 0, 0 ) : target.addVectors( this.min, this.max ).multiplyScalar( 0.5 );

		};

		Box3.prototype.getSize = function getSize ( target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Box3: .getSize() target is now required' );
				target = new Vector3();

			}

			return this.isEmpty() ? target.set( 0, 0, 0 ) : target.subVectors( this.max, this.min );

		};

		Box3.prototype.expandByPoint = function expandByPoint ( point ) {

			this.min.min( point );
			this.max.max( point );

			return this;

		};

		Box3.prototype.expandByVector = function expandByVector ( vector ) {

			this.min.sub( vector );
			this.max.add( vector );

			return this;

		};

		Box3.prototype.expandByScalar = function expandByScalar ( scalar ) {

			this.min.addScalar( - scalar );
			this.max.addScalar( scalar );

			return this;

		};

		Box3.prototype.expandByObject = function expandByObject ( object ) {

			// Computes the world-axis-aligned bounding box of an object (including its children),
			// accounting for both the object's, and children's, world transforms

			object.updateWorldMatrix( false, false );

			var geometry = object.geometry;

			if ( geometry !== undefined ) {

				if ( geometry.boundingBox === null ) {

					geometry.computeBoundingBox();

				}

				_box.copy( geometry.boundingBox );
				_box.applyMatrix4( object.matrixWorld );

				this.union( _box );

			}

			var children = object.children;

			for ( var i = 0, l = children.length; i < l; i ++ ) {

				this.expandByObject( children[ i ] );

			}

			return this;

		};

		Box3.prototype.containsPoint = function containsPoint ( point ) {

			return point.x < this.min.x || point.x > this.max.x ||
				point.y < this.min.y || point.y > this.max.y ||
				point.z < this.min.z || point.z > this.max.z ? false : true;

		};

		Box3.prototype.containsBox = function containsBox ( box ) {

			return this.min.x <= box.min.x && box.max.x <= this.max.x &&
				this.min.y <= box.min.y && box.max.y <= this.max.y &&
				this.min.z <= box.min.z && box.max.z <= this.max.z;

		};

		Box3.prototype.getParameter = function getParameter ( point, target ) {

			// This can potentially have a divide by zero if the box
			// has a size dimension of 0.

			if ( target === undefined ) {

				console.warn( 'THREE.Box3: .getParameter() target is now required' );
				target = new Vector3();

			}

			return target.set(
				( point.x - this.min.x ) / ( this.max.x - this.min.x ),
				( point.y - this.min.y ) / ( this.max.y - this.min.y ),
				( point.z - this.min.z ) / ( this.max.z - this.min.z )
			);

		};

		Box3.prototype.intersectsBox = function intersectsBox ( box ) {

			// using 6 splitting planes to rule out intersections.
			return box.max.x < this.min.x || box.min.x > this.max.x ||
				box.max.y < this.min.y || box.min.y > this.max.y ||
				box.max.z < this.min.z || box.min.z > this.max.z ? false : true;

		};

		Box3.prototype.intersectsSphere = function intersectsSphere ( sphere ) {

			// Find the point on the AABB closest to the sphere center.
			this.clampPoint( sphere.center, _vector$1 );

			// If that point is inside the sphere, the AABB and sphere intersect.
			return _vector$1.distanceToSquared( sphere.center ) <= ( sphere.radius * sphere.radius );

		};

		Box3.prototype.intersectsPlane = function intersectsPlane ( plane ) {

			// We compute the minimum and maximum dot product values. If those values
			// are on the same side (back or front) of the plane, then there is no intersection.

			var min, max;

			if ( plane.normal.x > 0 ) {

				min = plane.normal.x * this.min.x;
				max = plane.normal.x * this.max.x;

			} else {

				min = plane.normal.x * this.max.x;
				max = plane.normal.x * this.min.x;

			}

			if ( plane.normal.y > 0 ) {

				min += plane.normal.y * this.min.y;
				max += plane.normal.y * this.max.y;

			} else {

				min += plane.normal.y * this.max.y;
				max += plane.normal.y * this.min.y;

			}

			if ( plane.normal.z > 0 ) {

				min += plane.normal.z * this.min.z;
				max += plane.normal.z * this.max.z;

			} else {

				min += plane.normal.z * this.max.z;
				max += plane.normal.z * this.min.z;

			}

			return ( min <= - plane.constant && max >= - plane.constant );

		};

		Box3.prototype.intersectsTriangle = function intersectsTriangle ( triangle ) {

			if ( this.isEmpty() ) {

				return false;

			}

			// compute box center and extents
			this.getCenter( _center );
			_extents.subVectors( this.max, _center );

			// translate triangle to aabb origin
			_v0.subVectors( triangle.a, _center );
			_v1.subVectors( triangle.b, _center );
			_v2.subVectors( triangle.c, _center );

			// compute edge vectors for triangle
			_f0.subVectors( _v1, _v0 );
			_f1.subVectors( _v2, _v1 );
			_f2.subVectors( _v0, _v2 );

			// test against axes that are given by cross product combinations of the edges of the triangle and the edges of the aabb
			// make an axis testing of each of the 3 sides of the aabb against each of the 3 sides of the triangle = 9 axis of separation
			// axis_ij = u_i x f_j (u0, u1, u2 = face normals of aabb = x,y,z axes vectors since aabb is axis aligned)
			var axes = [
				0, - _f0.z, _f0.y, 0, - _f1.z, _f1.y, 0, - _f2.z, _f2.y,
				_f0.z, 0, - _f0.x, _f1.z, 0, - _f1.x, _f2.z, 0, - _f2.x,
				- _f0.y, _f0.x, 0, - _f1.y, _f1.x, 0, - _f2.y, _f2.x, 0
			];
			if ( ! satForAxes( axes, _v0, _v1, _v2, _extents ) ) {

				return false;

			}

			// test 3 face normals from the aabb
			axes = [ 1, 0, 0, 0, 1, 0, 0, 0, 1 ];
			if ( ! satForAxes( axes, _v0, _v1, _v2, _extents ) ) {

				return false;

			}

			// finally testing the face normal of the triangle
			// use already existing triangle edge vectors here
			_triangleNormal.crossVectors( _f0, _f1 );
			axes = [ _triangleNormal.x, _triangleNormal.y, _triangleNormal.z ];

			return satForAxes( axes, _v0, _v1, _v2, _extents );

		};

		Box3.prototype.clampPoint = function clampPoint ( point, target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Box3: .clampPoint() target is now required' );
				target = new Vector3();

			}

			return target.copy( point ).clamp( this.min, this.max );

		};

		Box3.prototype.distanceToPoint = function distanceToPoint ( point ) {

			var clampedPoint = _vector$1.copy( point ).clamp( this.min, this.max );

			return clampedPoint.sub( point ).length();

		};

		Box3.prototype.getBoundingSphere = function getBoundingSphere ( target ) {

			if ( target === undefined ) {

				console.error( 'THREE.Box3: .getBoundingSphere() target is now required' );
				//target = new Sphere(); // removed to avoid cyclic dependency

			}

			this.getCenter( target.center );

			target.radius = this.getSize( _vector$1 ).length() * 0.5;

			return target;

		};

		Box3.prototype.intersect = function intersect ( box ) {

			this.min.max( box.min );
			this.max.min( box.max );

			// ensure that if there is no overlap, the result is fully empty, not slightly empty with non-inf/+inf values that will cause subsequence intersects to erroneously return valid values.
			if ( this.isEmpty() ) { this.makeEmpty(); }

			return this;

		};

		Box3.prototype.union = function union ( box ) {

			this.min.min( box.min );
			this.max.max( box.max );

			return this;

		};

		Box3.prototype.applyMatrix4 = function applyMatrix4 ( matrix ) {

			// transform of empty box is an empty box.
			if ( this.isEmpty() ) { return this; }

			// NOTE: I am using a binary pattern to specify all 2^3 combinations below
			_points[ 0 ].set( this.min.x, this.min.y, this.min.z ).applyMatrix4( matrix ); // 000
			_points[ 1 ].set( this.min.x, this.min.y, this.max.z ).applyMatrix4( matrix ); // 001
			_points[ 2 ].set( this.min.x, this.max.y, this.min.z ).applyMatrix4( matrix ); // 010
			_points[ 3 ].set( this.min.x, this.max.y, this.max.z ).applyMatrix4( matrix ); // 011
			_points[ 4 ].set( this.max.x, this.min.y, this.min.z ).applyMatrix4( matrix ); // 100
			_points[ 5 ].set( this.max.x, this.min.y, this.max.z ).applyMatrix4( matrix ); // 101
			_points[ 6 ].set( this.max.x, this.max.y, this.min.z ).applyMatrix4( matrix ); // 110
			_points[ 7 ].set( this.max.x, this.max.y, this.max.z ).applyMatrix4( matrix ); // 111

			this.setFromPoints( _points );

			return this;

		};

		Box3.prototype.translate = function translate ( offset ) {

			this.min.add( offset );
			this.max.add( offset );

			return this;

		};

		Box3.prototype.equals = function equals ( box ) {

			return box.min.equals( this.min ) && box.max.equals( this.max );

		};

		function satForAxes( axes, v0, v1, v2, extents ) {

			for ( var i = 0, j = axes.length - 3; i <= j; i += 3 ) {

				_testAxis.fromArray( axes, i );
				// project the aabb onto the seperating axis
				var r = extents.x * Math.abs( _testAxis.x ) + extents.y * Math.abs( _testAxis.y ) + extents.z * Math.abs( _testAxis.z );
				// project all 3 vertices of the triangle onto the seperating axis
				var p0 = v0.dot( _testAxis );
				var p1 = v1.dot( _testAxis );
				var p2 = v2.dot( _testAxis );
				// actual test, basically see if either of the most extreme of the triangle points intersects r
				if ( Math.max( - Math.max( p0, p1, p2 ), Math.min( p0, p1, p2 ) ) > r ) {

					// points of the projected triangle are outside the projected half-length of the aabb
					// the axis is seperating and we can exit
					return false;

				}

			}

			return true;

		}

		var _points = [
			new Vector3(),
			new Vector3(),
			new Vector3(),
			new Vector3(),
			new Vector3(),
			new Vector3(),
			new Vector3(),
			new Vector3()
		];

		var _vector$1 = new Vector3();

		var _box = new Box3();

		// triangle centered vertices

		var _v0 = new Vector3();
		var _v1 = new Vector3();
		var _v2 = new Vector3();

		// triangle edge vectors

		var _f0 = new Vector3();
		var _f1 = new Vector3();
		var _f2 = new Vector3();

		var _center = new Vector3();
		var _extents = new Vector3();
		var _triangleNormal = new Vector3();
		var _testAxis = new Vector3();

		var _box$1 = new Box3();

		var Sphere = function Sphere( center, radius ) {

			this.center = ( center !== undefined ) ? center : new Vector3();
			this.radius = ( radius !== undefined ) ? radius : - 1;

		};

		Sphere.prototype.set = function set ( center, radius ) {

			this.center.copy( center );
			this.radius = radius;

			return this;

		};

		Sphere.prototype.setFromPoints = function setFromPoints ( points, optionalCenter ) {

			var center = this.center;

			if ( optionalCenter !== undefined ) {

				center.copy( optionalCenter );

			} else {

				_box$1.setFromPoints( points ).getCenter( center );

			}

			var maxRadiusSq = 0;

			for ( var i = 0, il = points.length; i < il; i ++ ) {

				maxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( points[ i ] ) );

			}

			this.radius = Math.sqrt( maxRadiusSq );

			return this;

		};

		Sphere.prototype.clone = function clone () {

			return new this.constructor().copy( this );

		};

		Sphere.prototype.copy = function copy ( sphere ) {

			this.center.copy( sphere.center );
			this.radius = sphere.radius;

			return this;

		};

		Sphere.prototype.isEmpty = function isEmpty () {

			return ( this.radius < 0 );

		};

		Sphere.prototype.makeEmpty = function makeEmpty () {

			this.center.set( 0, 0, 0 );
			this.radius = - 1;

			return this;

		};

		Sphere.prototype.containsPoint = function containsPoint ( point ) {

			return ( point.distanceToSquared( this.center ) <= ( this.radius * this.radius ) );

		};

		Sphere.prototype.distanceToPoint = function distanceToPoint ( point ) {

			return ( point.distanceTo( this.center ) - this.radius );

		};

		Sphere.prototype.intersectsSphere = function intersectsSphere ( sphere ) {

			var radiusSum = this.radius + sphere.radius;

			return sphere.center.distanceToSquared( this.center ) <= ( radiusSum * radiusSum );

		};

		Sphere.prototype.intersectsBox = function intersectsBox ( box ) {

			return box.intersectsSphere( this );

		};

		Sphere.prototype.intersectsPlane = function intersectsPlane ( plane ) {

			return Math.abs( plane.distanceToPoint( this.center ) ) <= this.radius;

		};

		Sphere.prototype.clampPoint = function clampPoint ( point, target ) {

			var deltaLengthSq = this.center.distanceToSquared( point );

			if ( target === undefined ) {

				console.warn( 'THREE.Sphere: .clampPoint() target is now required' );
				target = new Vector3();

			}

			target.copy( point );

			if ( deltaLengthSq > ( this.radius * this.radius ) ) {

				target.sub( this.center ).normalize();
				target.multiplyScalar( this.radius ).add( this.center );

			}

			return target;

		};

		Sphere.prototype.getBoundingBox = function getBoundingBox ( target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Sphere: .getBoundingBox() target is now required' );
				target = new Box3();

			}

			if ( this.isEmpty() ) {

				// Empty sphere produces empty bounding box
				target.makeEmpty();
				return target;

			}

			target.set( this.center, this.center );
			target.expandByScalar( this.radius );

			return target;

		};

		Sphere.prototype.applyMatrix4 = function applyMatrix4 ( matrix ) {

			this.center.applyMatrix4( matrix );
			this.radius = this.radius * matrix.getMaxScaleOnAxis();

			return this;

		};

		Sphere.prototype.translate = function translate ( offset ) {

			this.center.add( offset );

			return this;

		};

		Sphere.prototype.equals = function equals ( sphere ) {

			return sphere.center.equals( this.center ) && ( sphere.radius === this.radius );

		};

		var _vector$2 = new Vector3();
		var _segCenter = new Vector3();
		var _segDir = new Vector3();
		var _diff = new Vector3();

		var _edge1 = new Vector3();
		var _edge2 = new Vector3();
		var _normal = new Vector3();

		var Ray = function Ray( origin, direction ) {

			this.origin = ( origin !== undefined ) ? origin : new Vector3();
			this.direction = ( direction !== undefined ) ? direction : new Vector3( 0, 0, - 1 );

		};

		Ray.prototype.set = function set ( origin, direction ) {

			this.origin.copy( origin );
			this.direction.copy( direction );

			return this;

		};

		Ray.prototype.clone = function clone () {

			return new this.constructor().copy( this );

		};

		Ray.prototype.copy = function copy ( ray ) {

			this.origin.copy( ray.origin );
			this.direction.copy( ray.direction );

			return this;

		};

		Ray.prototype.at = function at ( t, target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Ray: .at() target is now required' );
				target = new Vector3();

			}

			return target.copy( this.direction ).multiplyScalar( t ).add( this.origin );

		};

		Ray.prototype.lookAt = function lookAt ( v ) {

			this.direction.copy( v ).sub( this.origin ).normalize();

			return this;

		};

		Ray.prototype.recast = function recast ( t ) {

			this.origin.copy( this.at( t, _vector$2 ) );

			return this;

		};

		Ray.prototype.closestPointToPoint = function closestPointToPoint ( point, target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Ray: .closestPointToPoint() target is now required' );
				target = new Vector3();

			}

			target.subVectors( point, this.origin );

			var directionDistance = target.dot( this.direction );

			if ( directionDistance < 0 ) {

				return target.copy( this.origin );

			}

			return target.copy( this.direction ).multiplyScalar( directionDistance ).add( this.origin );

		};

		Ray.prototype.distanceToPoint = function distanceToPoint ( point ) {

			return Math.sqrt( this.distanceSqToPoint( point ) );

		};

		Ray.prototype.distanceSqToPoint = function distanceSqToPoint ( point ) {

			var directionDistance = _vector$2.subVectors( point, this.origin ).dot( this.direction );

			// point behind the ray

			if ( directionDistance < 0 ) {

				return this.origin.distanceToSquared( point );

			}

			_vector$2.copy( this.direction ).multiplyScalar( directionDistance ).add( this.origin );

			return _vector$2.distanceToSquared( point );

		};

		Ray.prototype.distanceSqToSegment = function distanceSqToSegment ( v0, v1, optionalPointOnRay, optionalPointOnSegment ) {

			// from http://www.geometrictools.com/GTEngine/Include/Mathematics/GteDistRaySegment.h
			// It returns the min distance between the ray and the segment
			// defined by v0 and v1
			// It can also set two optional targets :
			// - The closest point on the ray
			// - The closest point on the segment

			_segCenter.copy( v0 ).add( v1 ).multiplyScalar( 0.5 );
			_segDir.copy( v1 ).sub( v0 ).normalize();
			_diff.copy( this.origin ).sub( _segCenter );

			var segExtent = v0.distanceTo( v1 ) * 0.5;
			var a01 = - this.direction.dot( _segDir );
			var b0 = _diff.dot( this.direction );
			var b1 = - _diff.dot( _segDir );
			var c = _diff.lengthSq();
			var det = Math.abs( 1 - a01 * a01 );
			var s0, s1, sqrDist, extDet;

			if ( det > 0 ) {

				// The ray and segment are not parallel.

				s0 = a01 * b1 - b0;
				s1 = a01 * b0 - b1;
				extDet = segExtent * det;

				if ( s0 >= 0 ) {

					if ( s1 >= - extDet ) {

						if ( s1 <= extDet ) {

							// region 0
							// Minimum at interior points of ray and segment.

							var invDet = 1 / det;
							s0 *= invDet;
							s1 *= invDet;
							sqrDist = s0 * ( s0 + a01 * s1 + 2 * b0 ) + s1 * ( a01 * s0 + s1 + 2 * b1 ) + c;

						} else {

							// region 1

							s1 = segExtent;
							s0 = Math.max( 0, - ( a01 * s1 + b0 ) );
							sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;

						}

					} else {

						// region 5

						s1 = - segExtent;
						s0 = Math.max( 0, - ( a01 * s1 + b0 ) );
						sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;

					}

				} else {

					if ( s1 <= - extDet ) {

						// region 4

						s0 = Math.max( 0, - ( - a01 * segExtent + b0 ) );
						s1 = ( s0 > 0 ) ? - segExtent : Math.min( Math.max( - segExtent, - b1 ), segExtent );
						sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;

					} else if ( s1 <= extDet ) {

						// region 3

						s0 = 0;
						s1 = Math.min( Math.max( - segExtent, - b1 ), segExtent );
						sqrDist = s1 * ( s1 + 2 * b1 ) + c;

					} else {

						// region 2

						s0 = Math.max( 0, - ( a01 * segExtent + b0 ) );
						s1 = ( s0 > 0 ) ? segExtent : Math.min( Math.max( - segExtent, - b1 ), segExtent );
						sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;

					}

				}

			} else {

				// Ray and segment are parallel.

				s1 = ( a01 > 0 ) ? - segExtent : segExtent;
				s0 = Math.max( 0, - ( a01 * s1 + b0 ) );
				sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;

			}

			if ( optionalPointOnRay ) {

				optionalPointOnRay.copy( this.direction ).multiplyScalar( s0 ).add( this.origin );

			}

			if ( optionalPointOnSegment ) {

				optionalPointOnSegment.copy( _segDir ).multiplyScalar( s1 ).add( _segCenter );

			}

			return sqrDist;

		};

		Ray.prototype.intersectSphere = function intersectSphere ( sphere, target ) {

			_vector$2.subVectors( sphere.center, this.origin );
			var tca = _vector$2.dot( this.direction );
			var d2 = _vector$2.dot( _vector$2 ) - tca * tca;
			var radius2 = sphere.radius * sphere.radius;

			if ( d2 > radius2 ) { return null; }

			var thc = Math.sqrt( radius2 - d2 );

			// t0 = first intersect point - entrance on front of sphere
			var t0 = tca - thc;

			// t1 = second intersect point - exit point on back of sphere
			var t1 = tca + thc;

			// test to see if both t0 and t1 are behind the ray - if so, return null
			if ( t0 < 0 && t1 < 0 ) { return null; }

			// test to see if t0 is behind the ray:
			// if it is, the ray is inside the sphere, so return the second exit point scaled by t1,
			// in order to always return an intersect point that is in front of the ray.
			if ( t0 < 0 ) { return this.at( t1, target ); }

			// else t0 is in front of the ray, so return the first collision point scaled by t0
			return this.at( t0, target );

		};

		Ray.prototype.intersectsSphere = function intersectsSphere ( sphere ) {

			return this.distanceSqToPoint( sphere.center ) <= ( sphere.radius * sphere.radius );

		};

		Ray.prototype.distanceToPlane = function distanceToPlane ( plane ) {

			var denominator = plane.normal.dot( this.direction );

			if ( denominator === 0 ) {

				// line is coplanar, return origin
				if ( plane.distanceToPoint( this.origin ) === 0 ) {

					return 0;

				}

				// Null is preferable to undefined since undefined means.... it is undefined

				return null;

			}

			var t = - ( this.origin.dot( plane.normal ) + plane.constant ) / denominator;

			// Return if the ray never intersects the plane

			return t >= 0 ? t : null;

		};

		Ray.prototype.intersectPlane = function intersectPlane ( plane, target ) {

			var t = this.distanceToPlane( plane );

			if ( t === null ) {

				return null;

			}

			return this.at( t, target );

		};

		Ray.prototype.intersectsPlane = function intersectsPlane ( plane ) {

			// check if the ray lies on the plane first

			var distToPoint = plane.distanceToPoint( this.origin );

			if ( distToPoint === 0 ) {

				return true;

			}

			var denominator = plane.normal.dot( this.direction );

			if ( denominator * distToPoint < 0 ) {

				return true;

			}

			// ray origin is behind the plane (and is pointing behind it)

			return false;

		};

		Ray.prototype.intersectBox = function intersectBox ( box, target ) {

			var tmin, tmax, tymin, tymax, tzmin, tzmax;

			var invdirx = 1 / this.direction.x,
				invdiry = 1 / this.direction.y,
				invdirz = 1 / this.direction.z;

			var origin = this.origin;

			if ( invdirx >= 0 ) {

				tmin = ( box.min.x - origin.x ) * invdirx;
				tmax = ( box.max.x - origin.x ) * invdirx;

			} else {

				tmin = ( box.max.x - origin.x ) * invdirx;
				tmax = ( box.min.x - origin.x ) * invdirx;

			}

			if ( invdiry >= 0 ) {

				tymin = ( box.min.y - origin.y ) * invdiry;
				tymax = ( box.max.y - origin.y ) * invdiry;

			} else {

				tymin = ( box.max.y - origin.y ) * invdiry;
				tymax = ( box.min.y - origin.y ) * invdiry;

			}

			if ( ( tmin > tymax ) || ( tymin > tmax ) ) { return null; }

			// These lines also handle the case where tmin or tmax is NaN
			// (result of 0 * Infinity). x !== x returns true if x is NaN

			if ( tymin > tmin || tmin !== tmin ) { tmin = tymin; }

			if ( tymax < tmax || tmax !== tmax ) { tmax = tymax; }

			if ( invdirz >= 0 ) {

				tzmin = ( box.min.z - origin.z ) * invdirz;
				tzmax = ( box.max.z - origin.z ) * invdirz;

			} else {

				tzmin = ( box.max.z - origin.z ) * invdirz;
				tzmax = ( box.min.z - origin.z ) * invdirz;

			}

			if ( ( tmin > tzmax ) || ( tzmin > tmax ) ) { return null; }

			if ( tzmin > tmin || tmin !== tmin ) { tmin = tzmin; }

			if ( tzmax < tmax || tmax !== tmax ) { tmax = tzmax; }

			//return point closest to the ray (positive side)

			if ( tmax < 0 ) { return null; }

			return this.at( tmin >= 0 ? tmin : tmax, target );

		};

		Ray.prototype.intersectsBox = function intersectsBox ( box ) {

			return this.intersectBox( box, _vector$2 ) !== null;

		};

		Ray.prototype.intersectTriangle = function intersectTriangle ( a, b, c, backfaceCulling, target ) {

			// Compute the offset origin, edges, and normal.

			// from http://www.geometrictools.com/GTEngine/Include/Mathematics/GteIntrRay3Triangle3.h

			_edge1.subVectors( b, a );
			_edge2.subVectors( c, a );
			_normal.crossVectors( _edge1, _edge2 );

			// Solve Q + t*D = b1*E1 + b2*E2 (Q = kDiff, D = ray direction,
			// E1 = kEdge1, E2 = kEdge2, N = Cross(E1,E2)) by
			//   |Dot(D,N)|*b1 = sign(Dot(D,N))*Dot(D,Cross(Q,E2))
			//   |Dot(D,N)|*b2 = sign(Dot(D,N))*Dot(D,Cross(E1,Q))
			//   |Dot(D,N)|*t = -sign(Dot(D,N))*Dot(Q,N)
			var DdN = this.direction.dot( _normal );
			var sign;

			if ( DdN > 0 ) {

				if ( backfaceCulling ) { return null; }
				sign = 1;

			} else if ( DdN < 0 ) {

				sign = - 1;
				DdN = - DdN;

			} else {

				return null;

			}

			_diff.subVectors( this.origin, a );
			var DdQxE2 = sign * this.direction.dot( _edge2.crossVectors( _diff, _edge2 ) );

			// b1 < 0, no intersection
			if ( DdQxE2 < 0 ) {

				return null;

			}

			var DdE1xQ = sign * this.direction.dot( _edge1.cross( _diff ) );

			// b2 < 0, no intersection
			if ( DdE1xQ < 0 ) {

				return null;

			}

			// b1+b2 > 1, no intersection
			if ( DdQxE2 + DdE1xQ > DdN ) {

				return null;

			}

			// Line intersects triangle, check if ray does.
			var QdN = - sign * _diff.dot( _normal );

			// t < 0, no intersection
			if ( QdN < 0 ) {

				return null;

			}

			// Ray intersects triangle.
			return this.at( QdN / DdN, target );

		};

		Ray.prototype.applyMatrix4 = function applyMatrix4 ( matrix4 ) {

			this.origin.applyMatrix4( matrix4 );
			this.direction.transformDirection( matrix4 );

			return this;

		};

		Ray.prototype.equals = function equals ( ray ) {

			return ray.origin.equals( this.origin ) && ray.direction.equals( this.direction );

		};

		var Matrix4 = function Matrix4() {

			Object.defineProperty( this, 'isMatrix4', { value: true } );

			this.elements = [

				1, 0, 0, 0,
				0, 1, 0, 0,
				0, 0, 1, 0,
				0, 0, 0, 1

			];

			if ( arguments.length > 0 ) {

				console.error( 'THREE.Matrix4: the constructor no longer reads arguments. use .set() instead.' );

			}

		};

		Matrix4.prototype.set = function set ( n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44 ) {

			var te = this.elements;

			te[ 0 ] = n11; te[ 4 ] = n12; te[ 8 ] = n13; te[ 12 ] = n14;
			te[ 1 ] = n21; te[ 5 ] = n22; te[ 9 ] = n23; te[ 13 ] = n24;
			te[ 2 ] = n31; te[ 6 ] = n32; te[ 10 ] = n33; te[ 14 ] = n34;
			te[ 3 ] = n41; te[ 7 ] = n42; te[ 11 ] = n43; te[ 15 ] = n44;

			return this;

		};

		Matrix4.prototype.identity = function identity () {

			this.set(

				1, 0, 0, 0,
				0, 1, 0, 0,
				0, 0, 1, 0,
				0, 0, 0, 1

			);

			return this;

		};

		Matrix4.prototype.clone = function clone () {

			return new Matrix4().fromArray( this.elements );

		};

		Matrix4.prototype.copy = function copy ( m ) {

			var te = this.elements;
			var me = m.elements;

			te[ 0 ] = me[ 0 ]; te[ 1 ] = me[ 1 ]; te[ 2 ] = me[ 2 ]; te[ 3 ] = me[ 3 ];
			te[ 4 ] = me[ 4 ]; te[ 5 ] = me[ 5 ]; te[ 6 ] = me[ 6 ]; te[ 7 ] = me[ 7 ];
			te[ 8 ] = me[ 8 ]; te[ 9 ] = me[ 9 ]; te[ 10 ] = me[ 10 ]; te[ 11 ] = me[ 11 ];
			te[ 12 ] = me[ 12 ]; te[ 13 ] = me[ 13 ]; te[ 14 ] = me[ 14 ]; te[ 15 ] = me[ 15 ];

			return this;

		};

		Matrix4.prototype.copyPosition = function copyPosition ( m ) {

			var te = this.elements, me = m.elements;

			te[ 12 ] = me[ 12 ];
			te[ 13 ] = me[ 13 ];
			te[ 14 ] = me[ 14 ];

			return this;

		};

		Matrix4.prototype.extractBasis = function extractBasis ( xAxis, yAxis, zAxis ) {

			xAxis.setFromMatrixColumn( this, 0 );
			yAxis.setFromMatrixColumn( this, 1 );
			zAxis.setFromMatrixColumn( this, 2 );

			return this;

		};

		Matrix4.prototype.makeBasis = function makeBasis ( xAxis, yAxis, zAxis ) {

			this.set(
				xAxis.x, yAxis.x, zAxis.x, 0,
				xAxis.y, yAxis.y, zAxis.y, 0,
				xAxis.z, yAxis.z, zAxis.z, 0,
				0, 0, 0, 1
			);

			return this;

		};

		Matrix4.prototype.extractRotation = function extractRotation ( m ) {

			// this method does not support reflection matrices

			var te = this.elements;
			var me = m.elements;

			var scaleX = 1 / _v1$1.setFromMatrixColumn( m, 0 ).length();
			var scaleY = 1 / _v1$1.setFromMatrixColumn( m, 1 ).length();
			var scaleZ = 1 / _v1$1.setFromMatrixColumn( m, 2 ).length();

			te[ 0 ] = me[ 0 ] * scaleX;
			te[ 1 ] = me[ 1 ] * scaleX;
			te[ 2 ] = me[ 2 ] * scaleX;
			te[ 3 ] = 0;

			te[ 4 ] = me[ 4 ] * scaleY;
			te[ 5 ] = me[ 5 ] * scaleY;
			te[ 6 ] = me[ 6 ] * scaleY;
			te[ 7 ] = 0;

			te[ 8 ] = me[ 8 ] * scaleZ;
			te[ 9 ] = me[ 9 ] * scaleZ;
			te[ 10 ] = me[ 10 ] * scaleZ;
			te[ 11 ] = 0;

			te[ 12 ] = 0;
			te[ 13 ] = 0;
			te[ 14 ] = 0;
			te[ 15 ] = 1;

			return this;

		};

		Matrix4.prototype.makeRotationFromEuler = function makeRotationFromEuler ( euler ) {

			if ( ! ( euler && euler.isEuler ) ) {

				console.error( 'THREE.Matrix4: .makeRotationFromEuler() now expects a Euler rotation rather than a Vector3 and order.' );

			}

			var te = this.elements;

			var x = euler.x, y = euler.y, z = euler.z;
			var a = Math.cos( x ), b = Math.sin( x );
			var c = Math.cos( y ), d = Math.sin( y );
			var e = Math.cos( z ), f = Math.sin( z );

			if ( euler.order === 'XYZ' ) {

				var ae = a * e, af = a * f, be = b * e, bf = b * f;

				te[ 0 ] = c * e;
				te[ 4 ] = - c * f;
				te[ 8 ] = d;

				te[ 1 ] = af + be * d;
				te[ 5 ] = ae - bf * d;
				te[ 9 ] = - b * c;

				te[ 2 ] = bf - ae * d;
				te[ 6 ] = be + af * d;
				te[ 10 ] = a * c;

			} else if ( euler.order === 'YXZ' ) {

				var ce = c * e, cf = c * f, de = d * e, df = d * f;

				te[ 0 ] = ce + df * b;
				te[ 4 ] = de * b - cf;
				te[ 8 ] = a * d;

				te[ 1 ] = a * f;
				te[ 5 ] = a * e;
				te[ 9 ] = - b;

				te[ 2 ] = cf * b - de;
				te[ 6 ] = df + ce * b;
				te[ 10 ] = a * c;

			} else if ( euler.order === 'ZXY' ) {

				var ce$1 = c * e, cf$1 = c * f, de$1 = d * e, df$1 = d * f;

				te[ 0 ] = ce$1 - df$1 * b;
				te[ 4 ] = - a * f;
				te[ 8 ] = de$1 + cf$1 * b;

				te[ 1 ] = cf$1 + de$1 * b;
				te[ 5 ] = a * e;
				te[ 9 ] = df$1 - ce$1 * b;

				te[ 2 ] = - a * d;
				te[ 6 ] = b;
				te[ 10 ] = a * c;

			} else if ( euler.order === 'ZYX' ) {

				var ae$1 = a * e, af$1 = a * f, be$1 = b * e, bf$1 = b * f;

				te[ 0 ] = c * e;
				te[ 4 ] = be$1 * d - af$1;
				te[ 8 ] = ae$1 * d + bf$1;

				te[ 1 ] = c * f;
				te[ 5 ] = bf$1 * d + ae$1;
				te[ 9 ] = af$1 * d - be$1;

				te[ 2 ] = - d;
				te[ 6 ] = b * c;
				te[ 10 ] = a * c;

			} else if ( euler.order === 'YZX' ) {

				var ac = a * c, ad = a * d, bc = b * c, bd = b * d;

				te[ 0 ] = c * e;
				te[ 4 ] = bd - ac * f;
				te[ 8 ] = bc * f + ad;

				te[ 1 ] = f;
				te[ 5 ] = a * e;
				te[ 9 ] = - b * e;

				te[ 2 ] = - d * e;
				te[ 6 ] = ad * f + bc;
				te[ 10 ] = ac - bd * f;

			} else if ( euler.order === 'XZY' ) {

				var ac$1 = a * c, ad$1 = a * d, bc$1 = b * c, bd$1 = b * d;

				te[ 0 ] = c * e;
				te[ 4 ] = - f;
				te[ 8 ] = d * e;

				te[ 1 ] = ac$1 * f + bd$1;
				te[ 5 ] = a * e;
				te[ 9 ] = ad$1 * f - bc$1;

				te[ 2 ] = bc$1 * f - ad$1;
				te[ 6 ] = b * e;
				te[ 10 ] = bd$1 * f + ac$1;

			}

			// bottom row
			te[ 3 ] = 0;
			te[ 7 ] = 0;
			te[ 11 ] = 0;

			// last column
			te[ 12 ] = 0;
			te[ 13 ] = 0;
			te[ 14 ] = 0;
			te[ 15 ] = 1;

			return this;

		};

		Matrix4.prototype.makeRotationFromQuaternion = function makeRotationFromQuaternion ( q ) {

			return this.compose( _zero, q, _one );

		};

		Matrix4.prototype.lookAt = function lookAt ( eye, target, up ) {

			var te = this.elements;

			_z.subVectors( eye, target );

			if ( _z.lengthSq() === 0 ) {

				// eye and target are in the same position

				_z.z = 1;

			}

			_z.normalize();
			_x.crossVectors( up, _z );

			if ( _x.lengthSq() === 0 ) {

				// up and z are parallel

				if ( Math.abs( up.z ) === 1 ) {

					_z.x += 0.0001;

				} else {

					_z.z += 0.0001;

				}

				_z.normalize();
				_x.crossVectors( up, _z );

			}

			_x.normalize();
			_y.crossVectors( _z, _x );

			te[ 0 ] = _x.x; te[ 4 ] = _y.x; te[ 8 ] = _z.x;
			te[ 1 ] = _x.y; te[ 5 ] = _y.y; te[ 9 ] = _z.y;
			te[ 2 ] = _x.z; te[ 6 ] = _y.z; te[ 10 ] = _z.z;

			return this;

		};

		Matrix4.prototype.multiply = function multiply ( m, n ) {

			if ( n !== undefined ) {

				console.warn( 'THREE.Matrix4: .multiply() now only accepts one argument. Use .multiplyMatrices( a, b ) instead.' );
				return this.multiplyMatrices( m, n );

			}

			return this.multiplyMatrices( this, m );

		};

		Matrix4.prototype.premultiply = function premultiply ( m ) {

			return this.multiplyMatrices( m, this );

		};

		Matrix4.prototype.multiplyMatrices = function multiplyMatrices ( a, b ) {

			var ae = a.elements;
			var be = b.elements;
			var te = this.elements;

			var a11 = ae[ 0 ], a12 = ae[ 4 ], a13 = ae[ 8 ], a14 = ae[ 12 ];
			var a21 = ae[ 1 ], a22 = ae[ 5 ], a23 = ae[ 9 ], a24 = ae[ 13 ];
			var a31 = ae[ 2 ], a32 = ae[ 6 ], a33 = ae[ 10 ], a34 = ae[ 14 ];
			var a41 = ae[ 3 ], a42 = ae[ 7 ], a43 = ae[ 11 ], a44 = ae[ 15 ];

			var b11 = be[ 0 ], b12 = be[ 4 ], b13 = be[ 8 ], b14 = be[ 12 ];
			var b21 = be[ 1 ], b22 = be[ 5 ], b23 = be[ 9 ], b24 = be[ 13 ];
			var b31 = be[ 2 ], b32 = be[ 6 ], b33 = be[ 10 ], b34 = be[ 14 ];
			var b41 = be[ 3 ], b42 = be[ 7 ], b43 = be[ 11 ], b44 = be[ 15 ];

			te[ 0 ] = a11 * b11 + a12 * b21 + a13 * b31 + a14 * b41;
			te[ 4 ] = a11 * b12 + a12 * b22 + a13 * b32 + a14 * b42;
			te[ 8 ] = a11 * b13 + a12 * b23 + a13 * b33 + a14 * b43;
			te[ 12 ] = a11 * b14 + a12 * b24 + a13 * b34 + a14 * b44;

			te[ 1 ] = a21 * b11 + a22 * b21 + a23 * b31 + a24 * b41;
			te[ 5 ] = a21 * b12 + a22 * b22 + a23 * b32 + a24 * b42;
			te[ 9 ] = a21 * b13 + a22 * b23 + a23 * b33 + a24 * b43;
			te[ 13 ] = a21 * b14 + a22 * b24 + a23 * b34 + a24 * b44;

			te[ 2 ] = a31 * b11 + a32 * b21 + a33 * b31 + a34 * b41;
			te[ 6 ] = a31 * b12 + a32 * b22 + a33 * b32 + a34 * b42;
			te[ 10 ] = a31 * b13 + a32 * b23 + a33 * b33 + a34 * b43;
			te[ 14 ] = a31 * b14 + a32 * b24 + a33 * b34 + a34 * b44;

			te[ 3 ] = a41 * b11 + a42 * b21 + a43 * b31 + a44 * b41;
			te[ 7 ] = a41 * b12 + a42 * b22 + a43 * b32 + a44 * b42;
			te[ 11 ] = a41 * b13 + a42 * b23 + a43 * b33 + a44 * b43;
			te[ 15 ] = a41 * b14 + a42 * b24 + a43 * b34 + a44 * b44;

			return this;

		};

		Matrix4.prototype.multiplyScalar = function multiplyScalar ( s ) {

			var te = this.elements;

			te[ 0 ] *= s; te[ 4 ] *= s; te[ 8 ] *= s; te[ 12 ] *= s;
			te[ 1 ] *= s; te[ 5 ] *= s; te[ 9 ] *= s; te[ 13 ] *= s;
			te[ 2 ] *= s; te[ 6 ] *= s; te[ 10 ] *= s; te[ 14 ] *= s;
			te[ 3 ] *= s; te[ 7 ] *= s; te[ 11 ] *= s; te[ 15 ] *= s;

			return this;

		};

		Matrix4.prototype.determinant = function determinant () {

			var te = this.elements;

			var n11 = te[ 0 ], n12 = te[ 4 ], n13 = te[ 8 ], n14 = te[ 12 ];
			var n21 = te[ 1 ], n22 = te[ 5 ], n23 = te[ 9 ], n24 = te[ 13 ];
			var n31 = te[ 2 ], n32 = te[ 6 ], n33 = te[ 10 ], n34 = te[ 14 ];
			var n41 = te[ 3 ], n42 = te[ 7 ], n43 = te[ 11 ], n44 = te[ 15 ];

			//TODO: make this more efficient
			//( based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm )

			return (
				n41 * (
					+ n14 * n23 * n32
						 - n13 * n24 * n32
						 - n14 * n22 * n33
						 + n12 * n24 * n33
						 + n13 * n22 * n34
						 - n12 * n23 * n34
				) +
				n42 * (
					+ n11 * n23 * n34
						 - n11 * n24 * n33
						 + n14 * n21 * n33
						 - n13 * n21 * n34
						 + n13 * n24 * n31
						 - n14 * n23 * n31
				) +
				n43 * (
					+ n11 * n24 * n32
						 - n11 * n22 * n34
						 - n14 * n21 * n32
						 + n12 * n21 * n34
						 + n14 * n22 * n31
						 - n12 * n24 * n31
				) +
				n44 * (
					- n13 * n22 * n31
						 - n11 * n23 * n32
						 + n11 * n22 * n33
						 + n13 * n21 * n32
						 - n12 * n21 * n33
						 + n12 * n23 * n31
				)

			);

		};

		Matrix4.prototype.transpose = function transpose () {

			var te = this.elements;
			var tmp;

			tmp = te[ 1 ]; te[ 1 ] = te[ 4 ]; te[ 4 ] = tmp;
			tmp = te[ 2 ]; te[ 2 ] = te[ 8 ]; te[ 8 ] = tmp;
			tmp = te[ 6 ]; te[ 6 ] = te[ 9 ]; te[ 9 ] = tmp;

			tmp = te[ 3 ]; te[ 3 ] = te[ 12 ]; te[ 12 ] = tmp;
			tmp = te[ 7 ]; te[ 7 ] = te[ 13 ]; te[ 13 ] = tmp;
			tmp = te[ 11 ]; te[ 11 ] = te[ 14 ]; te[ 14 ] = tmp;

			return this;

		};

		Matrix4.prototype.setPosition = function setPosition ( x, y, z ) {

			var te = this.elements;

			if ( x.isVector3 ) {

				te[ 12 ] = x.x;
				te[ 13 ] = x.y;
				te[ 14 ] = x.z;

			} else {

				te[ 12 ] = x;
				te[ 13 ] = y;
				te[ 14 ] = z;

			}

			return this;

		};

		Matrix4.prototype.getInverse = function getInverse ( m, throwOnDegenerate ) {

			if ( throwOnDegenerate !== undefined ) {

				console.warn( "THREE.Matrix4: .getInverse() can no longer be configured to throw on degenerate." );

			}

			// based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm
			var te = this.elements,
				me = m.elements,

				n11 = me[ 0 ], n21 = me[ 1 ], n31 = me[ 2 ], n41 = me[ 3 ],
				n12 = me[ 4 ], n22 = me[ 5 ], n32 = me[ 6 ], n42 = me[ 7 ],
				n13 = me[ 8 ], n23 = me[ 9 ], n33 = me[ 10 ], n43 = me[ 11 ],
				n14 = me[ 12 ], n24 = me[ 13 ], n34 = me[ 14 ], n44 = me[ 15 ],

				t11 = n23 * n34 * n42 - n24 * n33 * n42 + n24 * n32 * n43 - n22 * n34 * n43 - n23 * n32 * n44 + n22 * n33 * n44,
				t12 = n14 * n33 * n42 - n13 * n34 * n42 - n14 * n32 * n43 + n12 * n34 * n43 + n13 * n32 * n44 - n12 * n33 * n44,
				t13 = n13 * n24 * n42 - n14 * n23 * n42 + n14 * n22 * n43 - n12 * n24 * n43 - n13 * n22 * n44 + n12 * n23 * n44,
				t14 = n14 * n23 * n32 - n13 * n24 * n32 - n14 * n22 * n33 + n12 * n24 * n33 + n13 * n22 * n34 - n12 * n23 * n34;

			var det = n11 * t11 + n21 * t12 + n31 * t13 + n41 * t14;

			if ( det === 0 ) { return this.set( 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ); }

			var detInv = 1 / det;

			te[ 0 ] = t11 * detInv;
			te[ 1 ] = ( n24 * n33 * n41 - n23 * n34 * n41 - n24 * n31 * n43 + n21 * n34 * n43 + n23 * n31 * n44 - n21 * n33 * n44 ) * detInv;
			te[ 2 ] = ( n22 * n34 * n41 - n24 * n32 * n41 + n24 * n31 * n42 - n21 * n34 * n42 - n22 * n31 * n44 + n21 * n32 * n44 ) * detInv;
			te[ 3 ] = ( n23 * n32 * n41 - n22 * n33 * n41 - n23 * n31 * n42 + n21 * n33 * n42 + n22 * n31 * n43 - n21 * n32 * n43 ) * detInv;

			te[ 4 ] = t12 * detInv;
			te[ 5 ] = ( n13 * n34 * n41 - n14 * n33 * n41 + n14 * n31 * n43 - n11 * n34 * n43 - n13 * n31 * n44 + n11 * n33 * n44 ) * detInv;
			te[ 6 ] = ( n14 * n32 * n41 - n12 * n34 * n41 - n14 * n31 * n42 + n11 * n34 * n42 + n12 * n31 * n44 - n11 * n32 * n44 ) * detInv;
			te[ 7 ] = ( n12 * n33 * n41 - n13 * n32 * n41 + n13 * n31 * n42 - n11 * n33 * n42 - n12 * n31 * n43 + n11 * n32 * n43 ) * detInv;

			te[ 8 ] = t13 * detInv;
			te[ 9 ] = ( n14 * n23 * n41 - n13 * n24 * n41 - n14 * n21 * n43 + n11 * n24 * n43 + n13 * n21 * n44 - n11 * n23 * n44 ) * detInv;
			te[ 10 ] = ( n12 * n24 * n41 - n14 * n22 * n41 + n14 * n21 * n42 - n11 * n24 * n42 - n12 * n21 * n44 + n11 * n22 * n44 ) * detInv;
			te[ 11 ] = ( n13 * n22 * n41 - n12 * n23 * n41 - n13 * n21 * n42 + n11 * n23 * n42 + n12 * n21 * n43 - n11 * n22 * n43 ) * detInv;

			te[ 12 ] = t14 * detInv;
			te[ 13 ] = ( n13 * n24 * n31 - n14 * n23 * n31 + n14 * n21 * n33 - n11 * n24 * n33 - n13 * n21 * n34 + n11 * n23 * n34 ) * detInv;
			te[ 14 ] = ( n14 * n22 * n31 - n12 * n24 * n31 - n14 * n21 * n32 + n11 * n24 * n32 + n12 * n21 * n34 - n11 * n22 * n34 ) * detInv;
			te[ 15 ] = ( n12 * n23 * n31 - n13 * n22 * n31 + n13 * n21 * n32 - n11 * n23 * n32 - n12 * n21 * n33 + n11 * n22 * n33 ) * detInv;

			return this;

		};

		Matrix4.prototype.scale = function scale ( v ) {

			var te = this.elements;
			var x = v.x, y = v.y, z = v.z;

			te[ 0 ] *= x; te[ 4 ] *= y; te[ 8 ] *= z;
			te[ 1 ] *= x; te[ 5 ] *= y; te[ 9 ] *= z;
			te[ 2 ] *= x; te[ 6 ] *= y; te[ 10 ] *= z;
			te[ 3 ] *= x; te[ 7 ] *= y; te[ 11 ] *= z;

			return this;

		};

		Matrix4.prototype.getMaxScaleOnAxis = function getMaxScaleOnAxis () {

			var te = this.elements;

			var scaleXSq = te[ 0 ] * te[ 0 ] + te[ 1 ] * te[ 1 ] + te[ 2 ] * te[ 2 ];
			var scaleYSq = te[ 4 ] * te[ 4 ] + te[ 5 ] * te[ 5 ] + te[ 6 ] * te[ 6 ];
			var scaleZSq = te[ 8 ] * te[ 8 ] + te[ 9 ] * te[ 9 ] + te[ 10 ] * te[ 10 ];

			return Math.sqrt( Math.max( scaleXSq, scaleYSq, scaleZSq ) );

		};

		Matrix4.prototype.makeTranslation = function makeTranslation ( x, y, z ) {

			this.set(

				1, 0, 0, x,
				0, 1, 0, y,
				0, 0, 1, z,
				0, 0, 0, 1

			);

			return this;

		};

		Matrix4.prototype.makeRotationX = function makeRotationX ( theta ) {

			var c = Math.cos( theta ), s = Math.sin( theta );

			this.set(

				1, 0, 0, 0,
				0, c, - s, 0,
				0, s, c, 0,
				0, 0, 0, 1

			);

			return this;

		};

		Matrix4.prototype.makeRotationY = function makeRotationY ( theta ) {

			var c = Math.cos( theta ), s = Math.sin( theta );

			this.set(

					 c, 0, s, 0,
					 0, 1, 0, 0,
				- s, 0, c, 0,
					 0, 0, 0, 1

			);

			return this;

		};

		Matrix4.prototype.makeRotationZ = function makeRotationZ ( theta ) {

			var c = Math.cos( theta ), s = Math.sin( theta );

			this.set(

				c, - s, 0, 0,
				s, c, 0, 0,
				0, 0, 1, 0,
				0, 0, 0, 1

			);

			return this;

		};

		Matrix4.prototype.makeRotationAxis = function makeRotationAxis ( axis, angle ) {

			// Based on http://www.gamedev.net/reference/articles/article1199.asp

			var c = Math.cos( angle );
			var s = Math.sin( angle );
			var t = 1 - c;
			var x = axis.x, y = axis.y, z = axis.z;
			var tx = t * x, ty = t * y;

			this.set(

				tx * x + c, tx * y - s * z, tx * z + s * y, 0,
				tx * y + s * z, ty * y + c, ty * z - s * x, 0,
				tx * z - s * y, ty * z + s * x, t * z * z + c, 0,
				0, 0, 0, 1

			);

			return this;

		};

		Matrix4.prototype.makeScale = function makeScale ( x, y, z ) {

			this.set(

				x, 0, 0, 0,
				0, y, 0, 0,
				0, 0, z, 0,
				0, 0, 0, 1

			);

			return this;

		};

		Matrix4.prototype.makeShear = function makeShear ( x, y, z ) {

			this.set(

				1, y, z, 0,
				x, 1, z, 0,
				x, y, 1, 0,
				0, 0, 0, 1

			);

			return this;

		};

		Matrix4.prototype.compose = function compose ( position, quaternion, scale ) {

			var te = this.elements;

			var x = quaternion._x, y = quaternion._y, z = quaternion._z, w = quaternion._w;
			var x2 = x + x,y2 = y + y, z2 = z + z;
			var xx = x * x2, xy = x * y2, xz = x * z2;
			var yy = y * y2, yz = y * z2, zz = z * z2;
			var wx = w * x2, wy = w * y2, wz = w * z2;

			var sx = scale.x, sy = scale.y, sz = scale.z;

			te[ 0 ] = ( 1 - ( yy + zz ) ) * sx;
			te[ 1 ] = ( xy + wz ) * sx;
			te[ 2 ] = ( xz - wy ) * sx;
			te[ 3 ] = 0;

			te[ 4 ] = ( xy - wz ) * sy;
			te[ 5 ] = ( 1 - ( xx + zz ) ) * sy;
			te[ 6 ] = ( yz + wx ) * sy;
			te[ 7 ] = 0;

			te[ 8 ] = ( xz + wy ) * sz;
			te[ 9 ] = ( yz - wx ) * sz;
			te[ 10 ] = ( 1 - ( xx + yy ) ) * sz;
			te[ 11 ] = 0;

			te[ 12 ] = position.x;
			te[ 13 ] = position.y;
			te[ 14 ] = position.z;
			te[ 15 ] = 1;

			return this;

		};

		Matrix4.prototype.decompose = function decompose ( position, quaternion, scale ) {

			var te = this.elements;

			var sx = _v1$1.set( te[ 0 ], te[ 1 ], te[ 2 ] ).length();
			var sy = _v1$1.set( te[ 4 ], te[ 5 ], te[ 6 ] ).length();
			var sz = _v1$1.set( te[ 8 ], te[ 9 ], te[ 10 ] ).length();

			// if determine is negative, we need to invert one scale
			var det = this.determinant();
			if ( det < 0 ) { sx = - sx; }

			position.x = te[ 12 ];
			position.y = te[ 13 ];
			position.z = te[ 14 ];

			// scale the rotation part
			_m1.copy( this );

			var invSX = 1 / sx;
			var invSY = 1 / sy;
			var invSZ = 1 / sz;

			_m1.elements[ 0 ] *= invSX;
			_m1.elements[ 1 ] *= invSX;
			_m1.elements[ 2 ] *= invSX;

			_m1.elements[ 4 ] *= invSY;
			_m1.elements[ 5 ] *= invSY;
			_m1.elements[ 6 ] *= invSY;

			_m1.elements[ 8 ] *= invSZ;
			_m1.elements[ 9 ] *= invSZ;
			_m1.elements[ 10 ] *= invSZ;

			quaternion.setFromRotationMatrix( _m1 );

			scale.x = sx;
			scale.y = sy;
			scale.z = sz;

			return this;

		};

		Matrix4.prototype.makePerspective = function makePerspective ( left, right, top, bottom, near, far ) {

			if ( far === undefined ) {

				console.warn( 'THREE.Matrix4: .makePerspective() has been redefined and has a new signature. Please check the docs.' );

			}

			var te = this.elements;
			var x = 2 * near / ( right - left );
			var y = 2 * near / ( top - bottom );

			var a = ( right + left ) / ( right - left );
			var b = ( top + bottom ) / ( top - bottom );
			var c = - ( far + near ) / ( far - near );
			var d = - 2 * far * near / ( far - near );

			te[ 0 ] = x;te[ 4 ] = 0;te[ 8 ] = a;te[ 12 ] = 0;
			te[ 1 ] = 0;te[ 5 ] = y;te[ 9 ] = b;te[ 13 ] = 0;
			te[ 2 ] = 0;te[ 6 ] = 0;te[ 10 ] = c;te[ 14 ] = d;
			te[ 3 ] = 0;te[ 7 ] = 0;te[ 11 ] = - 1;te[ 15 ] = 0;

			return this;

		};

		Matrix4.prototype.makeOrthographic = function makeOrthographic ( left, right, top, bottom, near, far ) {

			var te = this.elements;
			var w = 1.0 / ( right - left );
			var h = 1.0 / ( top - bottom );
			var p = 1.0 / ( far - near );

			var x = ( right + left ) * w;
			var y = ( top + bottom ) * h;
			var z = ( far + near ) * p;

			te[ 0 ] = 2 * w;te[ 4 ] = 0;te[ 8 ] = 0;te[ 12 ] = - x;
			te[ 1 ] = 0;te[ 5 ] = 2 * h;te[ 9 ] = 0;te[ 13 ] = - y;
			te[ 2 ] = 0;te[ 6 ] = 0;te[ 10 ] = - 2 * p;te[ 14 ] = - z;
			te[ 3 ] = 0;te[ 7 ] = 0;te[ 11 ] = 0;te[ 15 ] = 1;

			return this;

		};

		Matrix4.prototype.equals = function equals ( matrix ) {

			var te = this.elements;
			var me = matrix.elements;

			for ( var i = 0; i < 16; i ++ ) {

				if ( te[ i ] !== me[ i ] ) { return false; }

			}

			return true;

		};

		Matrix4.prototype.fromArray = function fromArray ( array, offset ) {

			if ( offset === undefined ) { offset = 0; }

			for ( var i = 0; i < 16; i ++ ) {

				this.elements[ i ] = array[ i + offset ];

			}

			return this;

		};

		Matrix4.prototype.toArray = function toArray ( array, offset ) {

			if ( array === undefined ) { array = []; }
			if ( offset === undefined ) { offset = 0; }

			var te = this.elements;

			array[ offset ] = te[ 0 ];
			array[ offset + 1 ] = te[ 1 ];
			array[ offset + 2 ] = te[ 2 ];
			array[ offset + 3 ] = te[ 3 ];

			array[ offset + 4 ] = te[ 4 ];
			array[ offset + 5 ] = te[ 5 ];
			array[ offset + 6 ] = te[ 6 ];
			array[ offset + 7 ] = te[ 7 ];

			array[ offset + 8 ] = te[ 8 ];
			array[ offset + 9 ] = te[ 9 ];
			array[ offset + 10 ] = te[ 10 ];
			array[ offset + 11 ] = te[ 11 ];

			array[ offset + 12 ] = te[ 12 ];
			array[ offset + 13 ] = te[ 13 ];
			array[ offset + 14 ] = te[ 14 ];
			array[ offset + 15 ] = te[ 15 ];

			return array;

		};

		var _v1$1 = new Vector3();
		var _m1 = new Matrix4();
		var _zero = new Vector3( 0, 0, 0 );
		var _one = new Vector3( 1, 1, 1 );
		var _x = new Vector3();
		var _y = new Vector3();
		var _z = new Vector3();

		var Euler = function Euler( x, y, z, order ) {
			if ( x === void 0 ) x = 0;
			if ( y === void 0 ) y = 0;
			if ( z === void 0 ) z = 0;
			if ( order === void 0 ) order = Euler.DefaultOrder;


			Object.defineProperty( this, 'isEuler', { value: true } );

			this._x = x;
			this._y = y;
			this._z = z;
			this._order = order;

		};

		var prototypeAccessors$3 = { x: { configurable: true },y: { configurable: true },z: { configurable: true },order: { configurable: true } };

		prototypeAccessors$3.x.get = function () {

			return this._x;

		};

		prototypeAccessors$3.x.set = function ( value ) {

			this._x = value;
			this._onChangeCallback();

		};

		prototypeAccessors$3.y.get = function () {

			return this._y;

		};

		prototypeAccessors$3.y.set = function ( value ) {

			this._y = value;
			this._onChangeCallback();

		};

		prototypeAccessors$3.z.get = function () {

			return this._z;

		};

		prototypeAccessors$3.z.set = function ( value ) {

			this._z = value;
			this._onChangeCallback();

		};

		prototypeAccessors$3.order.get = function () {

			return this._order;

		};

		prototypeAccessors$3.order.set = function ( value ) {

			this._order = value;
			this._onChangeCallback();

		};

		Euler.prototype.set = function set ( x, y, z, order ) {

			this._x = x;
			this._y = y;
			this._z = z;
			this._order = order || this._order;

			this._onChangeCallback();

			return this;

		};

		Euler.prototype.clone = function clone () {

			return new this.constructor( this._x, this._y, this._z, this._order );

		};

		Euler.prototype.copy = function copy ( euler ) {

			this._x = euler._x;
			this._y = euler._y;
			this._z = euler._z;
			this._order = euler._order;

			this._onChangeCallback();

			return this;

		};

		Euler.prototype.setFromRotationMatrix = function setFromRotationMatrix ( m, order, update ) {

			var clamp = MathUtils.clamp;

			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)

			var te = m.elements;
			var m11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ];
			var m21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ];
			var m31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ];

			order = order || this._order;

			switch ( order ) {

				case 'XYZ':

					this._y = Math.asin( clamp( m13, - 1, 1 ) );

					if ( Math.abs( m13 ) < 0.9999999 ) {

						this._x = Math.atan2( - m23, m33 );
						this._z = Math.atan2( - m12, m11 );

					} else {

						this._x = Math.atan2( m32, m22 );
						this._z = 0;

					}

					break;

				case 'YXZ':

					this._x = Math.asin( - clamp( m23, - 1, 1 ) );

					if ( Math.abs( m23 ) < 0.9999999 ) {

						this._y = Math.atan2( m13, m33 );
						this._z = Math.atan2( m21, m22 );

					} else {

						this._y = Math.atan2( - m31, m11 );
						this._z = 0;

					}

					break;

				case 'ZXY':

					this._x = Math.asin( clamp( m32, - 1, 1 ) );

					if ( Math.abs( m32 ) < 0.9999999 ) {

						this._y = Math.atan2( - m31, m33 );
						this._z = Math.atan2( - m12, m22 );

					} else {

						this._y = 0;
						this._z = Math.atan2( m21, m11 );

					}

					break;

				case 'ZYX':

					this._y = Math.asin( - clamp( m31, - 1, 1 ) );

					if ( Math.abs( m31 ) < 0.9999999 ) {

						this._x = Math.atan2( m32, m33 );
						this._z = Math.atan2( m21, m11 );

					} else {

						this._x = 0;
						this._z = Math.atan2( - m12, m22 );

					}

					break;

				case 'YZX':

					this._z = Math.asin( clamp( m21, - 1, 1 ) );

					if ( Math.abs( m21 ) < 0.9999999 ) {

						this._x = Math.atan2( - m23, m22 );
						this._y = Math.atan2( - m31, m11 );

					} else {

						this._x = 0;
						this._y = Math.atan2( m13, m33 );

					}

					break;

				case 'XZY':

					this._z = Math.asin( - clamp( m12, - 1, 1 ) );

					if ( Math.abs( m12 ) < 0.9999999 ) {

						this._x = Math.atan2( m32, m22 );
						this._y = Math.atan2( m13, m11 );

					} else {

						this._x = Math.atan2( - m23, m33 );
						this._y = 0;

					}

					break;

				default:

					console.warn( 'THREE.Euler: .setFromRotationMatrix() encountered an unknown order: ' + order );

			}

			this._order = order;

			if ( update !== false ) { this._onChangeCallback(); }

			return this;

		};

		Euler.prototype.setFromQuaternion = function setFromQuaternion ( q, order, update ) {

			_matrix.makeRotationFromQuaternion( q );

			return this.setFromRotationMatrix( _matrix, order, update );

		};

		Euler.prototype.setFromVector3 = function setFromVector3 ( v, order ) {

			return this.set( v.x, v.y, v.z, order || this._order );

		};

		Euler.prototype.reorder = function reorder ( newOrder ) {

			// WARNING: this discards revolution information -bhouston

			_quaternion$1.setFromEuler( this );

			return this.setFromQuaternion( _quaternion$1, newOrder );

		};

		Euler.prototype.equals = function equals ( euler ) {

			return ( euler._x === this._x ) && ( euler._y === this._y ) && ( euler._z === this._z ) && ( euler._order === this._order );

		};

		Euler.prototype.fromArray = function fromArray ( array ) {

			this._x = array[ 0 ];
			this._y = array[ 1 ];
			this._z = array[ 2 ];
			if ( array[ 3 ] !== undefined ) { this._order = array[ 3 ]; }

			this._onChangeCallback();

			return this;

		};

		Euler.prototype.toArray = function toArray ( array, offset ) {

			if ( array === undefined ) { array = []; }
			if ( offset === undefined ) { offset = 0; }

			array[ offset ] = this._x;
			array[ offset + 1 ] = this._y;
			array[ offset + 2 ] = this._z;
			array[ offset + 3 ] = this._order;

			return array;

		};

		Euler.prototype.toVector3 = function toVector3 ( optionalResult ) {

			if ( optionalResult ) {

				return optionalResult.set( this._x, this._y, this._z );

			} else {

				return new Vector3( this._x, this._y, this._z );

			}

		};

		Euler.prototype._onChange = function _onChange ( callback ) {

			this._onChangeCallback = callback;

			return this;

		};

		Euler.prototype._onChangeCallback = function _onChangeCallback () {};

		Object.defineProperties( Euler.prototype, prototypeAccessors$3 );

		Euler.DefaultOrder = 'XYZ';
		Euler.RotationOrders = [ 'XYZ', 'YZX', 'ZXY', 'XZY', 'YXZ', 'ZYX' ];

		var _matrix = new Matrix4();
		var _quaternion$1 = new Quaternion();

		var Layers = function Layers() {

			this.mask = 1 | 0;

		};

		Layers.prototype.set = function set ( channel ) {

			this.mask = 1 << channel | 0;

		};

		Layers.prototype.enable = function enable ( channel ) {

			this.mask |= 1 << channel | 0;

		};

		Layers.prototype.enableAll = function enableAll () {

			this.mask = 0xffffffff | 0;

		};

		Layers.prototype.toggle = function toggle ( channel ) {

			this.mask ^= 1 << channel | 0;

		};

		Layers.prototype.disable = function disable ( channel ) {

			this.mask &= ~ ( 1 << channel | 0 );

		};

		Layers.prototype.disableAll = function disableAll () {

			this.mask = 0;

		};

		Layers.prototype.test = function test ( layers ) {

			return ( this.mask & layers.mask ) !== 0;

		};

		var _object3DId = 0;

		var _v1$2 = new Vector3();
		var _q1 = new Quaternion();
		var _m1$1 = new Matrix4();
		var _target = new Vector3();

		var _position = new Vector3();
		var _scale = new Vector3();
		var _quaternion$2 = new Quaternion();

		var _xAxis = new Vector3( 1, 0, 0 );
		var _yAxis = new Vector3( 0, 1, 0 );
		var _zAxis = new Vector3( 0, 0, 1 );

		var _addedEvent = { type: 'added' };
		var _removedEvent = { type: 'removed' };

		function Object3D() {

			Object.defineProperty( this, 'id', { value: _object3DId ++ } );

			this.uuid = MathUtils.generateUUID();

			this.name = '';
			this.type = 'Object3D';

			this.parent = null;
			this.children = [];

			this.up = Object3D.DefaultUp.clone();

			var position = new Vector3();
			var rotation = new Euler();
			var quaternion = new Quaternion();
			var scale = new Vector3( 1, 1, 1 );

			function onRotationChange() {

				quaternion.setFromEuler( rotation, false );

			}

			function onQuaternionChange() {

				rotation.setFromQuaternion( quaternion, undefined, false );

			}

			rotation._onChange( onRotationChange );
			quaternion._onChange( onQuaternionChange );

			Object.defineProperties( this, {
				position: {
					configurable: true,
					enumerable: true,
					value: position
				},
				rotation: {
					configurable: true,
					enumerable: true,
					value: rotation
				},
				quaternion: {
					configurable: true,
					enumerable: true,
					value: quaternion
				},
				scale: {
					configurable: true,
					enumerable: true,
					value: scale
				},
				modelViewMatrix: {
					value: new Matrix4()
				},
				normalMatrix: {
					value: new Matrix3()
				}
			} );

			this.matrix = new Matrix4();
			this.matrixWorld = new Matrix4();

			this.matrixAutoUpdate = Object3D.DefaultMatrixAutoUpdate;
			this.matrixWorldNeedsUpdate = false;

			this.layers = new Layers();
			this.visible = true;

			this.castShadow = false;
			this.receiveShadow = false;

			this.frustumCulled = true;
			this.renderOrder = 0;

			this.userData = {};

		}

		Object3D.DefaultUp = new Vector3( 0, 1, 0 );
		Object3D.DefaultMatrixAutoUpdate = true;

		Object3D.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {

			constructor: Object3D,

			isObject3D: true,

			onBeforeRender: function () {},
			onAfterRender: function () {},

			applyMatrix4: function ( matrix ) {

				if ( this.matrixAutoUpdate ) { this.updateMatrix(); }

				this.matrix.premultiply( matrix );

				this.matrix.decompose( this.position, this.quaternion, this.scale );

			},

			applyQuaternion: function ( q ) {

				this.quaternion.premultiply( q );

				return this;

			},

			setRotationFromAxisAngle: function ( axis, angle ) {

				// assumes axis is normalized

				this.quaternion.setFromAxisAngle( axis, angle );

			},

			setRotationFromEuler: function ( euler ) {

				this.quaternion.setFromEuler( euler, true );

			},

			setRotationFromMatrix: function ( m ) {

				// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)

				this.quaternion.setFromRotationMatrix( m );

			},

			setRotationFromQuaternion: function ( q ) {

				// assumes q is normalized

				this.quaternion.copy( q );

			},

			rotateOnAxis: function ( axis, angle ) {

				// rotate object on axis in object space
				// axis is assumed to be normalized

				_q1.setFromAxisAngle( axis, angle );

				this.quaternion.multiply( _q1 );

				return this;

			},

			rotateOnWorldAxis: function ( axis, angle ) {

				// rotate object on axis in world space
				// axis is assumed to be normalized
				// method assumes no rotated parent

				_q1.setFromAxisAngle( axis, angle );

				this.quaternion.premultiply( _q1 );

				return this;

			},

			rotateX: function ( angle ) {

				return this.rotateOnAxis( _xAxis, angle );

			},

			rotateY: function ( angle ) {

				return this.rotateOnAxis( _yAxis, angle );

			},

			rotateZ: function ( angle ) {

				return this.rotateOnAxis( _zAxis, angle );

			},

			translateOnAxis: function ( axis, distance ) {

				// translate object by distance along axis in object space
				// axis is assumed to be normalized

				_v1$2.copy( axis ).applyQuaternion( this.quaternion );

				this.position.add( _v1$2.multiplyScalar( distance ) );

				return this;

			},

			translateX: function ( distance ) {

				return this.translateOnAxis( _xAxis, distance );

			},

			translateY: function ( distance ) {

				return this.translateOnAxis( _yAxis, distance );

			},

			translateZ: function ( distance ) {

				return this.translateOnAxis( _zAxis, distance );

			},

			localToWorld: function ( vector ) {

				return vector.applyMatrix4( this.matrixWorld );

			},

			worldToLocal: function ( vector ) {

				return vector.applyMatrix4( _m1$1.getInverse( this.matrixWorld ) );

			},

			lookAt: function ( x, y, z ) {

				// This method does not support objects having non-uniformly-scaled parent(s)

				if ( x.isVector3 ) {

					_target.copy( x );

				} else {

					_target.set( x, y, z );

				}

				var parent = this.parent;

				this.updateWorldMatrix( true, false );

				_position.setFromMatrixPosition( this.matrixWorld );

				if ( this.isCamera || this.isLight ) {

					_m1$1.lookAt( _position, _target, this.up );

				} else {

					_m1$1.lookAt( _target, _position, this.up );

				}

				this.quaternion.setFromRotationMatrix( _m1$1 );

				if ( parent ) {

					_m1$1.extractRotation( parent.matrixWorld );
					_q1.setFromRotationMatrix( _m1$1 );
					this.quaternion.premultiply( _q1.inverse() );

				}

			},

			add: function ( object ) {

				if ( arguments.length > 1 ) {

					for ( var i = 0; i < arguments.length; i ++ ) {

						this.add( arguments[ i ] );

					}

					return this;

				}

				if ( object === this ) {

					console.error( "THREE.Object3D.add: object can't be added as a child of itself.", object );
					return this;

				}

				if ( ( object && object.isObject3D ) ) {

					if ( object.parent !== null ) {

						object.parent.remove( object );

					}

					object.parent = this;
					this.children.push( object );

					object.dispatchEvent( _addedEvent );

				} else {

					console.error( "THREE.Object3D.add: object not an instance of THREE.Object3D.", object );

				}

				return this;

			},

			remove: function ( object ) {

				if ( arguments.length > 1 ) {

					for ( var i = 0; i < arguments.length; i ++ ) {

						this.remove( arguments[ i ] );

					}

					return this;

				}

				var index = this.children.indexOf( object );

				if ( index !== - 1 ) {

					object.parent = null;
					this.children.splice( index, 1 );

					object.dispatchEvent( _removedEvent );

				}

				return this;

			},

			attach: function ( object ) {

				// adds object as a child of this, while maintaining the object's world transform

				this.updateWorldMatrix( true, false );

				_m1$1.getInverse( this.matrixWorld );

				if ( object.parent !== null ) {

					object.parent.updateWorldMatrix( true, false );

					_m1$1.multiply( object.parent.matrixWorld );

				}

				object.applyMatrix4( _m1$1 );

				object.updateWorldMatrix( false, false );

				this.add( object );

				return this;

			},

			getObjectById: function ( id ) {

				return this.getObjectByProperty( 'id', id );

			},

			getObjectByName: function ( name ) {

				return this.getObjectByProperty( 'name', name );

			},

			getObjectByProperty: function ( name, value ) {

				if ( this[ name ] === value ) { return this; }

				for ( var i = 0, l = this.children.length; i < l; i ++ ) {

					var child = this.children[ i ];
					var object = child.getObjectByProperty( name, value );

					if ( object !== undefined ) {

						return object;

					}

				}

				return undefined;

			},

			getWorldPosition: function ( target ) {

				if ( target === undefined ) {

					console.warn( 'THREE.Object3D: .getWorldPosition() target is now required' );
					target = new Vector3();

				}

				this.updateMatrixWorld( true );

				return target.setFromMatrixPosition( this.matrixWorld );

			},

			getWorldQuaternion: function ( target ) {

				if ( target === undefined ) {

					console.warn( 'THREE.Object3D: .getWorldQuaternion() target is now required' );
					target = new Quaternion();

				}

				this.updateMatrixWorld( true );

				this.matrixWorld.decompose( _position, target, _scale );

				return target;

			},

			getWorldScale: function ( target ) {

				if ( target === undefined ) {

					console.warn( 'THREE.Object3D: .getWorldScale() target is now required' );
					target = new Vector3();

				}

				this.updateMatrixWorld( true );

				this.matrixWorld.decompose( _position, _quaternion$2, target );

				return target;

			},

			getWorldDirection: function ( target ) {

				if ( target === undefined ) {

					console.warn( 'THREE.Object3D: .getWorldDirection() target is now required' );
					target = new Vector3();

				}

				this.updateMatrixWorld( true );

				var e = this.matrixWorld.elements;

				return target.set( e[ 8 ], e[ 9 ], e[ 10 ] ).normalize();

			},

			raycast: function () {},

			traverse: function ( callback ) {

				callback( this );

				var children = this.children;

				for ( var i = 0, l = children.length; i < l; i ++ ) {

					children[ i ].traverse( callback );

				}

			},

			traverseVisible: function ( callback ) {

				if ( this.visible === false ) { return; }

				callback( this );

				var children = this.children;

				for ( var i = 0, l = children.length; i < l; i ++ ) {

					children[ i ].traverseVisible( callback );

				}

			},

			traverseAncestors: function ( callback ) {

				var parent = this.parent;

				if ( parent !== null ) {

					callback( parent );

					parent.traverseAncestors( callback );

				}

			},

			updateMatrix: function () {

				this.matrix.compose( this.position, this.quaternion, this.scale );

				this.matrixWorldNeedsUpdate = true;

			},

			updateMatrixWorld: function ( force ) {

				if ( this.matrixAutoUpdate ) { this.updateMatrix(); }

				if ( this.matrixWorldNeedsUpdate || force ) {

					if ( this.parent === null ) {

						this.matrixWorld.copy( this.matrix );

					} else {

						this.matrixWorld.multiplyMatrices( this.parent.matrixWorld, this.matrix );

					}

					this.matrixWorldNeedsUpdate = false;

					force = true;

				}

				// update children

				var children = this.children;

				for ( var i = 0, l = children.length; i < l; i ++ ) {

					children[ i ].updateMatrixWorld( force );

				}

			},

			updateWorldMatrix: function ( updateParents, updateChildren ) {

				var parent = this.parent;

				if ( updateParents === true && parent !== null ) {

					parent.updateWorldMatrix( true, false );

				}

				if ( this.matrixAutoUpdate ) { this.updateMatrix(); }

				if ( this.parent === null ) {

					this.matrixWorld.copy( this.matrix );

				} else {

					this.matrixWorld.multiplyMatrices( this.parent.matrixWorld, this.matrix );

				}

				// update children

				if ( updateChildren === true ) {

					var children = this.children;

					for ( var i = 0, l = children.length; i < l; i ++ ) {

						children[ i ].updateWorldMatrix( false, true );

					}

				}

			},

			toJSON: function ( meta ) {

				// meta is a string when called from JSON.stringify
				var isRootObject = ( meta === undefined || typeof meta === 'string' );

				var output = {};

				// meta is a hash used to collect geometries, materials.
				// not providing it implies that this is the root object
				// being serialized.
				if ( isRootObject ) {

					// initialize meta obj
					meta = {
						geometries: {},
						materials: {},
						textures: {},
						images: {},
						shapes: {}
					};

					output.metadata = {
						version: 4.5,
						type: 'Object',
						generator: 'Object3D.toJSON'
					};

				}

				// standard Object3D serialization

				var object = {};

				object.uuid = this.uuid;
				object.type = this.type;

				if ( this.name !== '' ) { object.name = this.name; }
				if ( this.castShadow === true ) { object.castShadow = true; }
				if ( this.receiveShadow === true ) { object.receiveShadow = true; }
				if ( this.visible === false ) { object.visible = false; }
				if ( this.frustumCulled === false ) { object.frustumCulled = false; }
				if ( this.renderOrder !== 0 ) { object.renderOrder = this.renderOrder; }
				if ( JSON.stringify( this.userData ) !== '{}' ) { object.userData = this.userData; }

				object.layers = this.layers.mask;
				object.matrix = this.matrix.toArray();

				if ( this.matrixAutoUpdate === false ) { object.matrixAutoUpdate = false; }

				// object specific properties

				if ( this.isInstancedMesh ) {

					object.type = 'InstancedMesh';
					object.count = this.count;
					object.instanceMatrix = this.instanceMatrix.toJSON();

				}

				//

				function serialize( library, element ) {

					if ( library[ element.uuid ] === undefined ) {

						library[ element.uuid ] = element.toJSON( meta );

					}

					return element.uuid;

				}

				if ( this.isMesh || this.isLine || this.isPoints ) {

					object.geometry = serialize( meta.geometries, this.geometry );

					var parameters = this.geometry.parameters;

					if ( parameters !== undefined && parameters.shapes !== undefined ) {

						var shapes = parameters.shapes;

						if ( Array.isArray( shapes ) ) {

							for ( var i = 0, l = shapes.length; i < l; i ++ ) {

								var shape = shapes[ i ];

								serialize( meta.shapes, shape );

							}

						} else {

							serialize( meta.shapes, shapes );

						}

					}

				}

				if ( this.material !== undefined ) {

					if ( Array.isArray( this.material ) ) {

						var uuids = [];

						for ( var i$1 = 0, l$1 = this.material.length; i$1 < l$1; i$1 ++ ) {

							uuids.push( serialize( meta.materials, this.material[ i$1 ] ) );

						}

						object.material = uuids;

					} else {

						object.material = serialize( meta.materials, this.material );

					}

				}

				//

				if ( this.children.length > 0 ) {

					object.children = [];

					for ( var i$2 = 0; i$2 < this.children.length; i$2 ++ ) {

						object.children.push( this.children[ i$2 ].toJSON( meta ).object );

					}

				}

				if ( isRootObject ) {

					var geometries = extractFromCache( meta.geometries );
					var materials = extractFromCache( meta.materials );
					var textures = extractFromCache( meta.textures );
					var images = extractFromCache( meta.images );
					var shapes$1 = extractFromCache( meta.shapes );

					if ( geometries.length > 0 ) { output.geometries = geometries; }
					if ( materials.length > 0 ) { output.materials = materials; }
					if ( textures.length > 0 ) { output.textures = textures; }
					if ( images.length > 0 ) { output.images = images; }
					if ( shapes$1.length > 0 ) { output.shapes = shapes$1; }

				}

				output.object = object;

				return output;

				// extract data from the cache hash
				// remove metadata on each item
				// and return as array
				function extractFromCache( cache ) {

					var values = [];
					for ( var key in cache ) {

						var data = cache[ key ];
						delete data.metadata;
						values.push( data );

					}

					return values;

				}

			},

			clone: function ( recursive ) {

				return new this.constructor().copy( this, recursive );

			},

			copy: function ( source, recursive ) {

				if ( recursive === undefined ) { recursive = true; }

				this.name = source.name;

				this.up.copy( source.up );

				this.position.copy( source.position );
				this.rotation.order = source.rotation.order;
				this.quaternion.copy( source.quaternion );
				this.scale.copy( source.scale );

				this.matrix.copy( source.matrix );
				this.matrixWorld.copy( source.matrixWorld );

				this.matrixAutoUpdate = source.matrixAutoUpdate;
				this.matrixWorldNeedsUpdate = source.matrixWorldNeedsUpdate;

				this.layers.mask = source.layers.mask;
				this.visible = source.visible;

				this.castShadow = source.castShadow;
				this.receiveShadow = source.receiveShadow;

				this.frustumCulled = source.frustumCulled;
				this.renderOrder = source.renderOrder;

				this.userData = JSON.parse( JSON.stringify( source.userData ) );

				if ( recursive === true ) {

					for ( var i = 0; i < source.children.length; i ++ ) {

						var child = source.children[ i ];
						this.add( child.clone() );

					}

				}

				return this;

			}

		} );

		var _vector1 = new Vector3();
		var _vector2 = new Vector3();
		var _normalMatrix = new Matrix3();

		var Plane = function Plane( normal, constant ) {

			Object.defineProperty( this, 'isPlane', { value: true } );

			// normal is assumed to be normalized

			this.normal = ( normal !== undefined ) ? normal : new Vector3( 1, 0, 0 );
			this.constant = ( constant !== undefined ) ? constant : 0;

		};

		Plane.prototype.set = function set ( normal, constant ) {

			this.normal.copy( normal );
			this.constant = constant;

			return this;

		};

		Plane.prototype.setComponents = function setComponents ( x, y, z, w ) {

			this.normal.set( x, y, z );
			this.constant = w;

			return this;

		};

		Plane.prototype.setFromNormalAndCoplanarPoint = function setFromNormalAndCoplanarPoint ( normal, point ) {

			this.normal.copy( normal );
			this.constant = - point.dot( this.normal );

			return this;

		};

		Plane.prototype.setFromCoplanarPoints = function setFromCoplanarPoints ( a, b, c ) {

			var normal = _vector1.subVectors( c, b ).cross( _vector2.subVectors( a, b ) ).normalize();

			// Q: should an error be thrown if normal is zero (e.g. degenerate plane)?

			this.setFromNormalAndCoplanarPoint( normal, a );

			return this;

		};

		Plane.prototype.clone = function clone () {

			return new this.constructor().copy( this );

		};

		Plane.prototype.copy = function copy ( plane ) {

			this.normal.copy( plane.normal );
			this.constant = plane.constant;

			return this;

		};

		Plane.prototype.normalize = function normalize () {

			// Note: will lead to a divide by zero if the plane is invalid.

			var inverseNormalLength = 1.0 / this.normal.length();
			this.normal.multiplyScalar( inverseNormalLength );
			this.constant *= inverseNormalLength;

			return this;

		};

		Plane.prototype.negate = function negate () {

			this.constant *= - 1;
			this.normal.negate();

			return this;

		};

		Plane.prototype.distanceToPoint = function distanceToPoint ( point ) {

			return this.normal.dot( point ) + this.constant;

		};

		Plane.prototype.distanceToSphere = function distanceToSphere ( sphere ) {

			return this.distanceToPoint( sphere.center ) - sphere.radius;

		};

		Plane.prototype.projectPoint = function projectPoint ( point, target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Plane: .projectPoint() target is now required' );
				target = new Vector3();

			}

			return target.copy( this.normal ).multiplyScalar( - this.distanceToPoint( point ) ).add( point );

		};

		Plane.prototype.intersectLine = function intersectLine ( line, target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Plane: .intersectLine() target is now required' );
				target = new Vector3();

			}

			var direction = line.delta( _vector1 );

			var denominator = this.normal.dot( direction );

			if ( denominator === 0 ) {

				// line is coplanar, return origin
				if ( this.distanceToPoint( line.start ) === 0 ) {

					return target.copy( line.start );

				}

				// Unsure if this is the correct method to handle this case.
				return undefined;

			}

			var t = - ( line.start.dot( this.normal ) + this.constant ) / denominator;

			if ( t < 0 || t > 1 ) {

				return undefined;

			}

			return target.copy( direction ).multiplyScalar( t ).add( line.start );

		};

		Plane.prototype.intersectsLine = function intersectsLine ( line ) {

			// Note: this tests if a line intersects the plane, not whether it (or its end-points) are coplanar with it.

			var startSign = this.distanceToPoint( line.start );
			var endSign = this.distanceToPoint( line.end );

			return ( startSign < 0 && endSign > 0 ) || ( endSign < 0 && startSign > 0 );

		};

		Plane.prototype.intersectsBox = function intersectsBox ( box ) {

			return box.intersectsPlane( this );

		};

		Plane.prototype.intersectsSphere = function intersectsSphere ( sphere ) {

			return sphere.intersectsPlane( this );

		};

		Plane.prototype.coplanarPoint = function coplanarPoint ( target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Plane: .coplanarPoint() target is now required' );
				target = new Vector3();

			}

			return target.copy( this.normal ).multiplyScalar( - this.constant );

		};

		Plane.prototype.applyMatrix4 = function applyMatrix4 ( matrix, optionalNormalMatrix ) {

			var normalMatrix = optionalNormalMatrix || _normalMatrix.getNormalMatrix( matrix );

			var referencePoint = this.coplanarPoint( _vector1 ).applyMatrix4( matrix );

			var normal = this.normal.applyMatrix3( normalMatrix ).normalize();

			this.constant = - referencePoint.dot( normal );

			return this;

		};

		Plane.prototype.translate = function translate ( offset ) {

			this.constant -= offset.dot( this.normal );

			return this;

		};

		Plane.prototype.equals = function equals ( plane ) {

			return plane.normal.equals( this.normal ) && ( plane.constant === this.constant );

		};

		var _v0$1 = new Vector3();
		var _v1$3 = new Vector3();
		var _v2$1 = new Vector3();
		var _v3 = new Vector3();

		var _vab = new Vector3();
		var _vac = new Vector3();
		var _vbc = new Vector3();
		var _vap = new Vector3();
		var _vbp = new Vector3();
		var _vcp = new Vector3();

		var Triangle = function Triangle( a, b, c ) {

			this.a = ( a !== undefined ) ? a : new Vector3();
			this.b = ( b !== undefined ) ? b : new Vector3();
			this.c = ( c !== undefined ) ? c : new Vector3();

		};

		Triangle.getNormal = function getNormal ( a, b, c, target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Triangle: .getNormal() target is now required' );
				target = new Vector3();

			}

			target.subVectors( c, b );
			_v0$1.subVectors( a, b );
			target.cross( _v0$1 );

			var targetLengthSq = target.lengthSq();
			if ( targetLengthSq > 0 ) {

				return target.multiplyScalar( 1 / Math.sqrt( targetLengthSq ) );

			}

			return target.set( 0, 0, 0 );

		};

		// static/instance method to calculate barycentric coordinates
		// based on: http://www.blackpawn.com/texts/pointinpoly/default.html
		Triangle.getBarycoord = function getBarycoord ( point, a, b, c, target ) {

			_v0$1.subVectors( c, a );
			_v1$3.subVectors( b, a );
			_v2$1.subVectors( point, a );

			var dot00 = _v0$1.dot( _v0$1 );
			var dot01 = _v0$1.dot( _v1$3 );
			var dot02 = _v0$1.dot( _v2$1 );
			var dot11 = _v1$3.dot( _v1$3 );
			var dot12 = _v1$3.dot( _v2$1 );

			var denom = ( dot00 * dot11 - dot01 * dot01 );

			if ( target === undefined ) {

				console.warn( 'THREE.Triangle: .getBarycoord() target is now required' );
				target = new Vector3();

			}

			// collinear or singular triangle
			if ( denom === 0 ) {

				// arbitrary location outside of triangle?
				// not sure if this is the best idea, maybe should be returning undefined
				return target.set( - 2, - 1, - 1 );

			}

			var invDenom = 1 / denom;
			var u = ( dot11 * dot02 - dot01 * dot12 ) * invDenom;
			var v = ( dot00 * dot12 - dot01 * dot02 ) * invDenom;

			// barycentric coordinates must always sum to 1
			return target.set( 1 - u - v, v, u );

		};

		Triangle.containsPoint = function containsPoint ( point, a, b, c ) {

			this.getBarycoord( point, a, b, c, _v3 );

			return ( _v3.x >= 0 ) && ( _v3.y >= 0 ) && ( ( _v3.x + _v3.y ) <= 1 );

		};

		Triangle.getUV = function getUV ( point, p1, p2, p3, uv1, uv2, uv3, target ) {

			this.getBarycoord( point, p1, p2, p3, _v3 );

			target.set( 0, 0 );
			target.addScaledVector( uv1, _v3.x );
			target.addScaledVector( uv2, _v3.y );
			target.addScaledVector( uv3, _v3.z );

			return target;

		};

		Triangle.isFrontFacing = function isFrontFacing ( a, b, c, direction ) {

			_v0$1.subVectors( c, b );
			_v1$3.subVectors( a, b );

			// strictly front facing
			return ( _v0$1.cross( _v1$3 ).dot( direction ) < 0 ) ? true : false;

		};

		Triangle.prototype.set = function set ( a, b, c ) {

			this.a.copy( a );
			this.b.copy( b );
			this.c.copy( c );

			return this;

		};

		Triangle.prototype.setFromPointsAndIndices = function setFromPointsAndIndices ( points, i0, i1, i2 ) {

			this.a.copy( points[ i0 ] );
			this.b.copy( points[ i1 ] );
			this.c.copy( points[ i2 ] );

			return this;

		};

		Triangle.prototype.clone = function clone () {

			return new this.constructor().copy( this );

		};

		Triangle.prototype.copy = function copy ( triangle ) {

			this.a.copy( triangle.a );
			this.b.copy( triangle.b );
			this.c.copy( triangle.c );

			return this;

		};

		Triangle.prototype.getArea = function getArea () {

			_v0$1.subVectors( this.c, this.b );
			_v1$3.subVectors( this.a, this.b );

			return _v0$1.cross( _v1$3 ).length() * 0.5;

		};

		Triangle.prototype.getMidpoint = function getMidpoint ( target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Triangle: .getMidpoint() target is now required' );
				target = new Vector3();

			}

			return target.addVectors( this.a, this.b ).add( this.c ).multiplyScalar( 1 / 3 );

		};

		Triangle.prototype.getNormal = function getNormal ( target ) {

			return Triangle.getNormal( this.a, this.b, this.c, target );

		};

		Triangle.prototype.getPlane = function getPlane ( target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Triangle: .getPlane() target is now required' );
				target = new Plane();

			}

			return target.setFromCoplanarPoints( this.a, this.b, this.c );

		};

		Triangle.prototype.getBarycoord = function getBarycoord ( point, target ) {

			return Triangle.getBarycoord( point, this.a, this.b, this.c, target );

		};

		Triangle.prototype.getUV = function getUV ( point, uv1, uv2, uv3, target ) {

			return Triangle.getUV( point, this.a, this.b, this.c, uv1, uv2, uv3, target );

		};

		Triangle.prototype.containsPoint = function containsPoint ( point ) {

			return Triangle.containsPoint( point, this.a, this.b, this.c );

		};

		Triangle.prototype.isFrontFacing = function isFrontFacing ( direction ) {

			return Triangle.isFrontFacing( this.a, this.b, this.c, direction );

		};

		Triangle.prototype.intersectsBox = function intersectsBox ( box ) {

			return box.intersectsTriangle( this );

		};

		Triangle.prototype.closestPointToPoint = function closestPointToPoint ( p, target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Triangle: .closestPointToPoint() target is now required' );
				target = new Vector3();

			}

			var a = this.a, b = this.b, c = this.c;
			var v, w;

			// algorithm thanks to Real-Time Collision Detection by Christer Ericson,
			// published by Morgan Kaufmann Publishers, (c) 2005 Elsevier Inc.,
			// under the accompanying license; see chapter 5.1.5 for detailed explanation.
			// basically, we're distinguishing which of the voronoi regions of the triangle
			// the point lies in with the minimum amount of redundant computation.

			_vab.subVectors( b, a );
			_vac.subVectors( c, a );
			_vap.subVectors( p, a );
			var d1 = _vab.dot( _vap );
			var d2 = _vac.dot( _vap );
			if ( d1 <= 0 && d2 <= 0 ) {

				// vertex region of A; barycentric coords (1, 0, 0)
				return target.copy( a );

			}

			_vbp.subVectors( p, b );
			var d3 = _vab.dot( _vbp );
			var d4 = _vac.dot( _vbp );
			if ( d3 >= 0 && d4 <= d3 ) {

				// vertex region of B; barycentric coords (0, 1, 0)
				return target.copy( b );

			}

			var vc = d1 * d4 - d3 * d2;
			if ( vc <= 0 && d1 >= 0 && d3 <= 0 ) {

				v = d1 / ( d1 - d3 );
				// edge region of AB; barycentric coords (1-v, v, 0)
				return target.copy( a ).addScaledVector( _vab, v );

			}

			_vcp.subVectors( p, c );
			var d5 = _vab.dot( _vcp );
			var d6 = _vac.dot( _vcp );
			if ( d6 >= 0 && d5 <= d6 ) {

				// vertex region of C; barycentric coords (0, 0, 1)
				return target.copy( c );

			}

			var vb = d5 * d2 - d1 * d6;
			if ( vb <= 0 && d2 >= 0 && d6 <= 0 ) {

				w = d2 / ( d2 - d6 );
				// edge region of AC; barycentric coords (1-w, 0, w)
				return target.copy( a ).addScaledVector( _vac, w );

			}

			var va = d3 * d6 - d5 * d4;
			if ( va <= 0 && ( d4 - d3 ) >= 0 && ( d5 - d6 ) >= 0 ) {

				_vbc.subVectors( c, b );
				w = ( d4 - d3 ) / ( ( d4 - d3 ) + ( d5 - d6 ) );
				// edge region of BC; barycentric coords (0, 1-w, w)
				return target.copy( b ).addScaledVector( _vbc, w ); // edge region of BC

			}

			// face region
			var denom = 1 / ( va + vb + vc );
			// u = va * denom
			v = vb * denom;
			w = vc * denom;

			return target.copy( a ).addScaledVector( _vab, v ).addScaledVector( _vac, w );

		};

		Triangle.prototype.equals = function equals ( triangle ) {

			return triangle.a.equals( this.a ) && triangle.b.equals( this.b ) && triangle.c.equals( this.c );

		};

		var _colorKeywords = { 'aliceblue': 0xF0F8FF, 'antiquewhite': 0xFAEBD7, 'aqua': 0x00FFFF, 'aquamarine': 0x7FFFD4, 'azure': 0xF0FFFF,
			'beige': 0xF5F5DC, 'bisque': 0xFFE4C4, 'black': 0x000000, 'blanchedalmond': 0xFFEBCD, 'blue': 0x0000FF, 'blueviolet': 0x8A2BE2,
			'brown': 0xA52A2A, 'burlywood': 0xDEB887, 'cadetblue': 0x5F9EA0, 'chartreuse': 0x7FFF00, 'chocolate': 0xD2691E, 'coral': 0xFF7F50,
			'cornflowerblue': 0x6495ED, 'cornsilk': 0xFFF8DC, 'crimson': 0xDC143C, 'cyan': 0x00FFFF, 'darkblue': 0x00008B, 'darkcyan': 0x008B8B,
			'darkgoldenrod': 0xB8860B, 'darkgray': 0xA9A9A9, 'darkgreen': 0x006400, 'darkgrey': 0xA9A9A9, 'darkkhaki': 0xBDB76B, 'darkmagenta': 0x8B008B,
			'darkolivegreen': 0x556B2F, 'darkorange': 0xFF8C00, 'darkorchid': 0x9932CC, 'darkred': 0x8B0000, 'darksalmon': 0xE9967A, 'darkseagreen': 0x8FBC8F,
			'darkslateblue': 0x483D8B, 'darkslategray': 0x2F4F4F, 'darkslategrey': 0x2F4F4F, 'darkturquoise': 0x00CED1, 'darkviolet': 0x9400D3,
			'deeppink': 0xFF1493, 'deepskyblue': 0x00BFFF, 'dimgray': 0x696969, 'dimgrey': 0x696969, 'dodgerblue': 0x1E90FF, 'firebrick': 0xB22222,
			'floralwhite': 0xFFFAF0, 'forestgreen': 0x228B22, 'fuchsia': 0xFF00FF, 'gainsboro': 0xDCDCDC, 'ghostwhite': 0xF8F8FF, 'gold': 0xFFD700,
			'goldenrod': 0xDAA520, 'gray': 0x808080, 'green': 0x008000, 'greenyellow': 0xADFF2F, 'grey': 0x808080, 'honeydew': 0xF0FFF0, 'hotpink': 0xFF69B4,
			'indianred': 0xCD5C5C, 'indigo': 0x4B0082, 'ivory': 0xFFFFF0, 'khaki': 0xF0E68C, 'lavender': 0xE6E6FA, 'lavenderblush': 0xFFF0F5, 'lawngreen': 0x7CFC00,
			'lemonchiffon': 0xFFFACD, 'lightblue': 0xADD8E6, 'lightcoral': 0xF08080, 'lightcyan': 0xE0FFFF, 'lightgoldenrodyellow': 0xFAFAD2, 'lightgray': 0xD3D3D3,
			'lightgreen': 0x90EE90, 'lightgrey': 0xD3D3D3, 'lightpink': 0xFFB6C1, 'lightsalmon': 0xFFA07A, 'lightseagreen': 0x20B2AA, 'lightskyblue': 0x87CEFA,
			'lightslategray': 0x778899, 'lightslategrey': 0x778899, 'lightsteelblue': 0xB0C4DE, 'lightyellow': 0xFFFFE0, 'lime': 0x00FF00, 'limegreen': 0x32CD32,
			'linen': 0xFAF0E6, 'magenta': 0xFF00FF, 'maroon': 0x800000, 'mediumaquamarine': 0x66CDAA, 'mediumblue': 0x0000CD, 'mediumorchid': 0xBA55D3,
			'mediumpurple': 0x9370DB, 'mediumseagreen': 0x3CB371, 'mediumslateblue': 0x7B68EE, 'mediumspringgreen': 0x00FA9A, 'mediumturquoise': 0x48D1CC,
			'mediumvioletred': 0xC71585, 'midnightblue': 0x191970, 'mintcream': 0xF5FFFA, 'mistyrose': 0xFFE4E1, 'moccasin': 0xFFE4B5, 'navajowhite': 0xFFDEAD,
			'navy': 0x000080, 'oldlace': 0xFDF5E6, 'olive': 0x808000, 'olivedrab': 0x6B8E23, 'orange': 0xFFA500, 'orangered': 0xFF4500, 'orchid': 0xDA70D6,
			'palegoldenrod': 0xEEE8AA, 'palegreen': 0x98FB98, 'paleturquoise': 0xAFEEEE, 'palevioletred': 0xDB7093, 'papayawhip': 0xFFEFD5, 'peachpuff': 0xFFDAB9,
			'peru': 0xCD853F, 'pink': 0xFFC0CB, 'plum': 0xDDA0DD, 'powderblue': 0xB0E0E6, 'purple': 0x800080, 'rebeccapurple': 0x663399, 'red': 0xFF0000, 'rosybrown': 0xBC8F8F,
			'royalblue': 0x4169E1, 'saddlebrown': 0x8B4513, 'salmon': 0xFA8072, 'sandybrown': 0xF4A460, 'seagreen': 0x2E8B57, 'seashell': 0xFFF5EE,
			'sienna': 0xA0522D, 'silver': 0xC0C0C0, 'skyblue': 0x87CEEB, 'slateblue': 0x6A5ACD, 'slategray': 0x708090, 'slategrey': 0x708090, 'snow': 0xFFFAFA,
			'springgreen': 0x00FF7F, 'steelblue': 0x4682B4, 'tan': 0xD2B48C, 'teal': 0x008080, 'thistle': 0xD8BFD8, 'tomato': 0xFF6347, 'turquoise': 0x40E0D0,
			'violet': 0xEE82EE, 'wheat': 0xF5DEB3, 'white': 0xFFFFFF, 'whitesmoke': 0xF5F5F5, 'yellow': 0xFFFF00, 'yellowgreen': 0x9ACD32 };

		var _hslA = { h: 0, s: 0, l: 0 };
		var _hslB = { h: 0, s: 0, l: 0 };

		function hue2rgb( p, q, t ) {

			if ( t < 0 ) { t += 1; }
			if ( t > 1 ) { t -= 1; }
			if ( t < 1 / 6 ) { return p + ( q - p ) * 6 * t; }
			if ( t < 1 / 2 ) { return q; }
			if ( t < 2 / 3 ) { return p + ( q - p ) * 6 * ( 2 / 3 - t ); }
			return p;

		}

		function SRGBToLinear( c ) {

			return ( c < 0.04045 ) ? c * 0.0773993808 : Math.pow( c * 0.9478672986 + 0.0521327014, 2.4 );

		}

		function LinearToSRGB( c ) {

			return ( c < 0.0031308 ) ? c * 12.92 : 1.055 * ( Math.pow( c, 0.41666 ) ) - 0.055;

		}

		var Color = function Color( r, g, b ) {

			Object.defineProperty( this, 'isColor', { value: true } );

			if ( g === undefined && b === undefined ) {

				// r is THREE.Color, hex or string
				return this.set( r );

			}

			return this.setRGB( r, g, b );

		};

		Color.prototype.set = function set ( value ) {

			if ( value && value.isColor ) {

				this.copy( value );

			} else if ( typeof value === 'number' ) {

				this.setHex( value );

			} else if ( typeof value === 'string' ) {

				this.setStyle( value );

			}

			return this;

		};

		Color.prototype.setScalar = function setScalar ( scalar ) {

			this.r = scalar;
			this.g = scalar;
			this.b = scalar;

			return this;

		};

		Color.prototype.setHex = function setHex ( hex ) {

			hex = Math.floor( hex );

			this.r = ( hex >> 16 & 255 ) / 255;
			this.g = ( hex >> 8 & 255 ) / 255;
			this.b = ( hex & 255 ) / 255;

			return this;

		};

		Color.prototype.setRGB = function setRGB ( r, g, b ) {

			this.r = r;
			this.g = g;
			this.b = b;

			return this;

		};

		Color.prototype.setHSL = function setHSL ( h, s, l ) {

			// h,s,l ranges are in 0.0 - 1.0
			h = MathUtils.euclideanModulo( h, 1 );
			s = MathUtils.clamp( s, 0, 1 );
			l = MathUtils.clamp( l, 0, 1 );

			if ( s === 0 ) {

				this.r = this.g = this.b = l;

			} else {

				var p = l <= 0.5 ? l * ( 1 + s ) : l + s - ( l * s );
				var q = ( 2 * l ) - p;

				this.r = hue2rgb( q, p, h + 1 / 3 );
				this.g = hue2rgb( q, p, h );
				this.b = hue2rgb( q, p, h - 1 / 3 );

			}

			return this;

		};

		Color.prototype.setStyle = function setStyle ( style ) {

			function handleAlpha( string ) {

				if ( string === undefined ) { return; }

				if ( parseFloat( string ) < 1 ) {

					console.warn( 'THREE.Color: Alpha component of ' + style + ' will be ignored.' );

				}

			}


			var m;

			if ( m = /^((?:rgb|hsl)a?)\(\s*([^\)]*)\)/.exec( style ) ) {

				// rgb / hsl

				var color;
				var name = m[ 1 ];
				var components = m[ 2 ];

				switch ( name ) {

					case 'rgb':
					case 'rgba':

						if ( color = /^(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*(,\s*([0-9]*\.?[0-9]+)\s*)?$/.exec( components ) ) {

							// rgb(255,0,0) rgba(255,0,0,0.5)
							this.r = Math.min( 255, parseInt( color[ 1 ], 10 ) ) / 255;
							this.g = Math.min( 255, parseInt( color[ 2 ], 10 ) ) / 255;
							this.b = Math.min( 255, parseInt( color[ 3 ], 10 ) ) / 255;

							handleAlpha( color[ 5 ] );

							return this;

						}

						if ( color = /^(\d+)\%\s*,\s*(\d+)\%\s*,\s*(\d+)\%\s*(,\s*([0-9]*\.?[0-9]+)\s*)?$/.exec( components ) ) {

							// rgb(100%,0%,0%) rgba(100%,0%,0%,0.5)
							this.r = Math.min( 100, parseInt( color[ 1 ], 10 ) ) / 100;
							this.g = Math.min( 100, parseInt( color[ 2 ], 10 ) ) / 100;
							this.b = Math.min( 100, parseInt( color[ 3 ], 10 ) ) / 100;

							handleAlpha( color[ 5 ] );

							return this;

						}

						break;

					case 'hsl':
					case 'hsla':

						if ( color = /^([0-9]*\.?[0-9]+)\s*,\s*(\d+)\%\s*,\s*(\d+)\%\s*(,\s*([0-9]*\.?[0-9]+)\s*)?$/.exec( components ) ) {

							// hsl(120,50%,50%) hsla(120,50%,50%,0.5)
							var h = parseFloat( color[ 1 ] ) / 360;
							var s = parseInt( color[ 2 ], 10 ) / 100;
							var l = parseInt( color[ 3 ], 10 ) / 100;

							handleAlpha( color[ 5 ] );

							return this.setHSL( h, s, l );

						}

						break;

				}

			} else if ( m = /^\#([A-Fa-f0-9]+)$/.exec( style ) ) {

				// hex color

				var hex = m[ 1 ];
				var size = hex.length;

				if ( size === 3 ) {

					// #ff0
					this.r = parseInt( hex.charAt( 0 ) + hex.charAt( 0 ), 16 ) / 255;
					this.g = parseInt( hex.charAt( 1 ) + hex.charAt( 1 ), 16 ) / 255;
					this.b = parseInt( hex.charAt( 2 ) + hex.charAt( 2 ), 16 ) / 255;

					return this;

				} else if ( size === 6 ) {

					// #ff0000
					this.r = parseInt( hex.charAt( 0 ) + hex.charAt( 1 ), 16 ) / 255;
					this.g = parseInt( hex.charAt( 2 ) + hex.charAt( 3 ), 16 ) / 255;
					this.b = parseInt( hex.charAt( 4 ) + hex.charAt( 5 ), 16 ) / 255;

					return this;

				}

			}

			if ( style && style.length > 0 ) {

				return this.setColorName( style );

			}

			return this;

		};

		Color.prototype.setColorName = function setColorName ( style ) {

			// color keywords
			var hex = _colorKeywords[ style ];

			if ( hex !== undefined ) {

				// red
				this.setHex( hex );

			} else {

				// unknown color
				console.warn( 'THREE.Color: Unknown color ' + style );

			}

			return this;

		};

		Color.prototype.clone = function clone () {

			return new this.constructor( this.r, this.g, this.b );

		};

		Color.prototype.copy = function copy ( color ) {

			this.r = color.r;
			this.g = color.g;
			this.b = color.b;

			return this;

		};

		Color.prototype.copyGammaToLinear = function copyGammaToLinear ( color, gammaFactor ) {

			if ( gammaFactor === undefined ) { gammaFactor = 2.0; }

			this.r = Math.pow( color.r, gammaFactor );
			this.g = Math.pow( color.g, gammaFactor );
			this.b = Math.pow( color.b, gammaFactor );

			return this;

		};

		Color.prototype.copyLinearToGamma = function copyLinearToGamma ( color, gammaFactor ) {

			if ( gammaFactor === undefined ) { gammaFactor = 2.0; }

			var safeInverse = ( gammaFactor > 0 ) ? ( 1.0 / gammaFactor ) : 1.0;

			this.r = Math.pow( color.r, safeInverse );
			this.g = Math.pow( color.g, safeInverse );
			this.b = Math.pow( color.b, safeInverse );

			return this;

		};

		Color.prototype.convertGammaToLinear = function convertGammaToLinear ( gammaFactor ) {

			this.copyGammaToLinear( this, gammaFactor );

			return this;

		};

		Color.prototype.convertLinearToGamma = function convertLinearToGamma ( gammaFactor ) {

			this.copyLinearToGamma( this, gammaFactor );

			return this;

		};

		Color.prototype.copySRGBToLinear = function copySRGBToLinear ( color ) {

			this.r = SRGBToLinear( color.r );
			this.g = SRGBToLinear( color.g );
			this.b = SRGBToLinear( color.b );

			return this;

		};

		Color.prototype.copyLinearToSRGB = function copyLinearToSRGB ( color ) {

			this.r = LinearToSRGB( color.r );
			this.g = LinearToSRGB( color.g );
			this.b = LinearToSRGB( color.b );

			return this;

		};

		Color.prototype.convertSRGBToLinear = function convertSRGBToLinear () {

			this.copySRGBToLinear( this );

			return this;

		};

		Color.prototype.convertLinearToSRGB = function convertLinearToSRGB () {

			this.copyLinearToSRGB( this );

			return this;

		};

		Color.prototype.getHex = function getHex () {

			return ( this.r * 255 ) << 16 ^ ( this.g * 255 ) << 8 ^ ( this.b * 255 ) << 0;

		};

		Color.prototype.getHexString = function getHexString () {

			return ( '000000' + this.getHex().toString( 16 ) ).slice( - 6 );

		};

		Color.prototype.getHSL = function getHSL ( target ) {

			// h,s,l ranges are in 0.0 - 1.0

			if ( target === undefined ) {

				console.warn( 'THREE.Color: .getHSL() target is now required' );
				target = { h: 0, s: 0, l: 0 };

			}

			var r = this.r, g = this.g, b = this.b;

			var max = Math.max( r, g, b );
			var min = Math.min( r, g, b );

			var hue, saturation;
			var lightness = ( min + max ) / 2.0;

			if ( min === max ) {

				hue = 0;
				saturation = 0;

			} else {

				var delta = max - min;

				saturation = lightness <= 0.5 ? delta / ( max + min ) : delta / ( 2 - max - min );

				switch ( max ) {

					case r: hue = ( g - b ) / delta + ( g < b ? 6 : 0 ); break;
					case g: hue = ( b - r ) / delta + 2; break;
					case b: hue = ( r - g ) / delta + 4; break;

				}

				hue /= 6;

			}

			target.h = hue;
			target.s = saturation;
			target.l = lightness;

			return target;

		};

		Color.prototype.getStyle = function getStyle () {

			return 'rgb(' + ( ( this.r * 255 ) | 0 ) + ',' + ( ( this.g * 255 ) | 0 ) + ',' + ( ( this.b * 255 ) | 0 ) + ')';

		};

		Color.prototype.offsetHSL = function offsetHSL ( h, s, l ) {

			this.getHSL( _hslA );

			_hslA.h += h; _hslA.s += s; _hslA.l += l;

			this.setHSL( _hslA.h, _hslA.s, _hslA.l );

			return this;

		};

		Color.prototype.add = function add ( color ) {

			this.r += color.r;
			this.g += color.g;
			this.b += color.b;

			return this;

		};

		Color.prototype.addColors = function addColors ( color1, color2 ) {

			this.r = color1.r + color2.r;
			this.g = color1.g + color2.g;
			this.b = color1.b + color2.b;

			return this;

		};

		Color.prototype.addScalar = function addScalar ( s ) {

			this.r += s;
			this.g += s;
			this.b += s;

			return this;

		};

		Color.prototype.sub = function sub ( color ) {

			this.r = Math.max( 0, this.r - color.r );
			this.g = Math.max( 0, this.g - color.g );
			this.b = Math.max( 0, this.b - color.b );

			return this;

		};

		Color.prototype.multiply = function multiply ( color ) {

			this.r *= color.r;
			this.g *= color.g;
			this.b *= color.b;

			return this;

		};

		Color.prototype.multiplyScalar = function multiplyScalar ( s ) {

			this.r *= s;
			this.g *= s;
			this.b *= s;

			return this;

		};

		Color.prototype.lerp = function lerp ( color, alpha ) {

			this.r += ( color.r - this.r ) * alpha;
			this.g += ( color.g - this.g ) * alpha;
			this.b += ( color.b - this.b ) * alpha;

			return this;

		};

		Color.prototype.lerpHSL = function lerpHSL ( color, alpha ) {

			this.getHSL( _hslA );
			color.getHSL( _hslB );

			var h = MathUtils.lerp( _hslA.h, _hslB.h, alpha );
			var s = MathUtils.lerp( _hslA.s, _hslB.s, alpha );
			var l = MathUtils.lerp( _hslA.l, _hslB.l, alpha );

			this.setHSL( h, s, l );

			return this;

		};

		Color.prototype.equals = function equals ( c ) {

			return ( c.r === this.r ) && ( c.g === this.g ) && ( c.b === this.b );

		};

		Color.prototype.fromArray = function fromArray ( array, offset ) {

			if ( offset === undefined ) { offset = 0; }

			this.r = array[ offset ];
			this.g = array[ offset + 1 ];
			this.b = array[ offset + 2 ];

			return this;

		};

		Color.prototype.toArray = function toArray ( array, offset ) {

			if ( array === undefined ) { array = []; }
			if ( offset === undefined ) { offset = 0; }

			array[ offset ] = this.r;
			array[ offset + 1 ] = this.g;
			array[ offset + 2 ] = this.b;

			return array;

		};

		Color.prototype.fromBufferAttribute = function fromBufferAttribute ( attribute, index ) {

			this.r = attribute.getX( index );
			this.g = attribute.getY( index );
			this.b = attribute.getZ( index );

			if ( attribute.normalized === true ) {

				// assuming Uint8Array

				this.r /= 255;
				this.g /= 255;
				this.b /= 255;

			}

			return this;

		};

		Color.prototype.toJSON = function toJSON () {

			return this.getHex();

		};

		Color.NAMES = _colorKeywords;
		Color.prototype.r = 1;
		Color.prototype.g = 1;
		Color.prototype.b = 1;

		var Face3 = function Face3( a, b, c, normal, color, materialIndex ) {

			this.a = a;
			this.b = b;
			this.c = c;

			this.normal = ( normal && normal.isVector3 ) ? normal : new Vector3();
			this.vertexNormals = Array.isArray( normal ) ? normal : [];

			this.color = ( color && color.isColor ) ? color : new Color();
			this.vertexColors = Array.isArray( color ) ? color : [];

			this.materialIndex = materialIndex !== undefined ? materialIndex : 0;

		};

		Face3.prototype.clone = function clone () {

			return new this.constructor().copy( this );

		};

		Face3.prototype.copy = function copy ( source ) {

			this.a = source.a;
			this.b = source.b;
			this.c = source.c;

			this.normal.copy( source.normal );
			this.color.copy( source.color );

			this.materialIndex = source.materialIndex;

			for ( var i = 0, il = source.vertexNormals.length; i < il; i ++ ) {

				this.vertexNormals[ i ] = source.vertexNormals[ i ].clone();

			}

			for ( var i$1 = 0, il$1 = source.vertexColors.length; i$1 < il$1; i$1 ++ ) {

				this.vertexColors[ i$1 ] = source.vertexColors[ i$1 ].clone();

			}

			return this;

		};

		var materialId = 0;

		function Material() {

			Object.defineProperty( this, 'id', { value: materialId ++ } );

			this.uuid = MathUtils.generateUUID();

			this.name = '';
			this.type = 'Material';

			this.fog = true;

			this.blending = NormalBlending;
			this.side = FrontSide;
			this.flatShading = false;
			this.vertexColors = false;

			this.opacity = 1;
			this.transparent = false;

			this.blendSrc = SrcAlphaFactor;
			this.blendDst = OneMinusSrcAlphaFactor;
			this.blendEquation = AddEquation;
			this.blendSrcAlpha = null;
			this.blendDstAlpha = null;
			this.blendEquationAlpha = null;

			this.depthFunc = LessEqualDepth;
			this.depthTest = true;
			this.depthWrite = true;

			this.stencilWriteMask = 0xff;
			this.stencilFunc = AlwaysStencilFunc;
			this.stencilRef = 0;
			this.stencilFuncMask = 0xff;
			this.stencilFail = KeepStencilOp;
			this.stencilZFail = KeepStencilOp;
			this.stencilZPass = KeepStencilOp;
			this.stencilWrite = false;

			this.clippingPlanes = null;
			this.clipIntersection = false;
			this.clipShadows = false;

			this.shadowSide = null;

			this.colorWrite = true;

			this.precision = null; // override the renderer's default precision for this material

			this.polygonOffset = false;
			this.polygonOffsetFactor = 0;
			this.polygonOffsetUnits = 0;

			this.dithering = false;

			this.alphaTest = 0;
			this.premultipliedAlpha = false;

			this.visible = true;

			this.toneMapped = true;

			this.userData = {};

			this.version = 0;

		}

		Material.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {

			constructor: Material,

			isMaterial: true,

			onBeforeCompile: function ( /* shaderobject, renderer */ ) {},

			customProgramCacheKey: function () {

				return this.onBeforeCompile.toString();

			},

			setValues: function ( values ) {

				if ( values === undefined ) { return; }

				for ( var key in values ) {

					var newValue = values[ key ];

					if ( newValue === undefined ) {

						console.warn( "THREE.Material: '" + key + "' parameter is undefined." );
						continue;

					}

					// for backward compatability if shading is set in the constructor
					if ( key === 'shading' ) {

						console.warn( 'THREE.' + this.type + ': .shading has been removed. Use the boolean .flatShading instead.' );
						this.flatShading = ( newValue === FlatShading ) ? true : false;
						continue;

					}

					var currentValue = this[ key ];

					if ( currentValue === undefined ) {

						console.warn( "THREE." + this.type + ": '" + key + "' is not a property of this material." );
						continue;

					}

					if ( currentValue && currentValue.isColor ) {

						currentValue.set( newValue );

					} else if ( ( currentValue && currentValue.isVector3 ) && ( newValue && newValue.isVector3 ) ) {

						currentValue.copy( newValue );

					} else {

						this[ key ] = newValue;

					}

				}

			},

			toJSON: function ( meta ) {

				var isRoot = ( meta === undefined || typeof meta === 'string' );

				if ( isRoot ) {

					meta = {
						textures: {},
						images: {}
					};

				}

				var data = {
					metadata: {
						version: 4.5,
						type: 'Material',
						generator: 'Material.toJSON'
					}
				};

				// standard Material serialization
				data.uuid = this.uuid;
				data.type = this.type;

				if ( this.name !== '' ) { data.name = this.name; }

				if ( this.color && this.color.isColor ) { data.color = this.color.getHex(); }

				if ( this.roughness !== undefined ) { data.roughness = this.roughness; }
				if ( this.metalness !== undefined ) { data.metalness = this.metalness; }

				if ( this.sheen && this.sheen.isColor ) { data.sheen = this.sheen.getHex(); }
				if ( this.emissive && this.emissive.isColor ) { data.emissive = this.emissive.getHex(); }
				if ( this.emissiveIntensity && this.emissiveIntensity !== 1 ) { data.emissiveIntensity = this.emissiveIntensity; }

				if ( this.specular && this.specular.isColor ) { data.specular = this.specular.getHex(); }
				if ( this.shininess !== undefined ) { data.shininess = this.shininess; }
				if ( this.clearcoat !== undefined ) { data.clearcoat = this.clearcoat; }
				if ( this.clearcoatRoughness !== undefined ) { data.clearcoatRoughness = this.clearcoatRoughness; }

				if ( this.clearcoatMap && this.clearcoatMap.isTexture ) {

					data.clearcoatMap = this.clearcoatMap.toJSON( meta ).uuid;

				}

				if ( this.clearcoatRoughnessMap && this.clearcoatRoughnessMap.isTexture ) {

					data.clearcoatRoughnessMap = this.clearcoatRoughnessMap.toJSON( meta ).uuid;

				}

				if ( this.clearcoatNormalMap && this.clearcoatNormalMap.isTexture ) {

					data.clearcoatNormalMap = this.clearcoatNormalMap.toJSON( meta ).uuid;
					data.clearcoatNormalScale = this.clearcoatNormalScale.toArray();

				}

				if ( this.map && this.map.isTexture ) { data.map = this.map.toJSON( meta ).uuid; }
				if ( this.matcap && this.matcap.isTexture ) { data.matcap = this.matcap.toJSON( meta ).uuid; }
				if ( this.alphaMap && this.alphaMap.isTexture ) { data.alphaMap = this.alphaMap.toJSON( meta ).uuid; }
				if ( this.lightMap && this.lightMap.isTexture ) { data.lightMap = this.lightMap.toJSON( meta ).uuid; }

				if ( this.aoMap && this.aoMap.isTexture ) {

					data.aoMap = this.aoMap.toJSON( meta ).uuid;
					data.aoMapIntensity = this.aoMapIntensity;

				}

				if ( this.bumpMap && this.bumpMap.isTexture ) {

					data.bumpMap = this.bumpMap.toJSON( meta ).uuid;
					data.bumpScale = this.bumpScale;

				}

				if ( this.normalMap && this.normalMap.isTexture ) {

					data.normalMap = this.normalMap.toJSON( meta ).uuid;
					data.normalMapType = this.normalMapType;
					data.normalScale = this.normalScale.toArray();

				}

				if ( this.displacementMap && this.displacementMap.isTexture ) {

					data.displacementMap = this.displacementMap.toJSON( meta ).uuid;
					data.displacementScale = this.displacementScale;
					data.displacementBias = this.displacementBias;

				}

				if ( this.roughnessMap && this.roughnessMap.isTexture ) { data.roughnessMap = this.roughnessMap.toJSON( meta ).uuid; }
				if ( this.metalnessMap && this.metalnessMap.isTexture ) { data.metalnessMap = this.metalnessMap.toJSON( meta ).uuid; }

				if ( this.emissiveMap && this.emissiveMap.isTexture ) { data.emissiveMap = this.emissiveMap.toJSON( meta ).uuid; }
				if ( this.specularMap && this.specularMap.isTexture ) { data.specularMap = this.specularMap.toJSON( meta ).uuid; }

				if ( this.envMap && this.envMap.isTexture ) {

					data.envMap = this.envMap.toJSON( meta ).uuid;
					data.reflectivity = this.reflectivity; // Scale behind envMap
					data.refractionRatio = this.refractionRatio;

					if ( this.combine !== undefined ) { data.combine = this.combine; }
					if ( this.envMapIntensity !== undefined ) { data.envMapIntensity = this.envMapIntensity; }

				}

				if ( this.gradientMap && this.gradientMap.isTexture ) {

					data.gradientMap = this.gradientMap.toJSON( meta ).uuid;

				}

				if ( this.size !== undefined ) { data.size = this.size; }
				if ( this.sizeAttenuation !== undefined ) { data.sizeAttenuation = this.sizeAttenuation; }

				if ( this.blending !== NormalBlending ) { data.blending = this.blending; }
				if ( this.flatShading === true ) { data.flatShading = this.flatShading; }
				if ( this.side !== FrontSide ) { data.side = this.side; }
				if ( this.vertexColors ) { data.vertexColors = true; }

				if ( this.opacity < 1 ) { data.opacity = this.opacity; }
				if ( this.transparent === true ) { data.transparent = this.transparent; }

				data.depthFunc = this.depthFunc;
				data.depthTest = this.depthTest;
				data.depthWrite = this.depthWrite;

				data.stencilWrite = this.stencilWrite;
				data.stencilWriteMask = this.stencilWriteMask;
				data.stencilFunc = this.stencilFunc;
				data.stencilRef = this.stencilRef;
				data.stencilFuncMask = this.stencilFuncMask;
				data.stencilFail = this.stencilFail;
				data.stencilZFail = this.stencilZFail;
				data.stencilZPass = this.stencilZPass;

				// rotation (SpriteMaterial)
				if ( this.rotation && this.rotation !== 0 ) { data.rotation = this.rotation; }

				if ( this.polygonOffset === true ) { data.polygonOffset = true; }
				if ( this.polygonOffsetFactor !== 0 ) { data.polygonOffsetFactor = this.polygonOffsetFactor; }
				if ( this.polygonOffsetUnits !== 0 ) { data.polygonOffsetUnits = this.polygonOffsetUnits; }

				if ( this.linewidth && this.linewidth !== 1 ) { data.linewidth = this.linewidth; }
				if ( this.dashSize !== undefined ) { data.dashSize = this.dashSize; }
				if ( this.gapSize !== undefined ) { data.gapSize = this.gapSize; }
				if ( this.scale !== undefined ) { data.scale = this.scale; }

				if ( this.dithering === true ) { data.dithering = true; }

				if ( this.alphaTest > 0 ) { data.alphaTest = this.alphaTest; }
				if ( this.premultipliedAlpha === true ) { data.premultipliedAlpha = this.premultipliedAlpha; }

				if ( this.wireframe === true ) { data.wireframe = this.wireframe; }
				if ( this.wireframeLinewidth > 1 ) { data.wireframeLinewidth = this.wireframeLinewidth; }
				if ( this.wireframeLinecap !== 'round' ) { data.wireframeLinecap = this.wireframeLinecap; }
				if ( this.wireframeLinejoin !== 'round' ) { data.wireframeLinejoin = this.wireframeLinejoin; }

				if ( this.morphTargets === true ) { data.morphTargets = true; }
				if ( this.morphNormals === true ) { data.morphNormals = true; }
				if ( this.skinning === true ) { data.skinning = true; }

				if ( this.visible === false ) { data.visible = false; }

				if ( this.toneMapped === false ) { data.toneMapped = false; }

				if ( JSON.stringify( this.userData ) !== '{}' ) { data.userData = this.userData; }

				// TODO: Copied from Object3D.toJSON

				function extractFromCache( cache ) {

					var values = [];

					for ( var key in cache ) {

						var data = cache[ key ];
						delete data.metadata;
						values.push( data );

					}

					return values;

				}

				if ( isRoot ) {

					var textures = extractFromCache( meta.textures );
					var images = extractFromCache( meta.images );

					if ( textures.length > 0 ) { data.textures = textures; }
					if ( images.length > 0 ) { data.images = images; }

				}

				return data;

			},

			clone: function () {

				return new this.constructor().copy( this );

			},

			copy: function ( source ) {

				this.name = source.name;

				this.fog = source.fog;

				this.blending = source.blending;
				this.side = source.side;
				this.flatShading = source.flatShading;
				this.vertexColors = source.vertexColors;

				this.opacity = source.opacity;
				this.transparent = source.transparent;

				this.blendSrc = source.blendSrc;
				this.blendDst = source.blendDst;
				this.blendEquation = source.blendEquation;
				this.blendSrcAlpha = source.blendSrcAlpha;
				this.blendDstAlpha = source.blendDstAlpha;
				this.blendEquationAlpha = source.blendEquationAlpha;

				this.depthFunc = source.depthFunc;
				this.depthTest = source.depthTest;
				this.depthWrite = source.depthWrite;

				this.stencilWriteMask = source.stencilWriteMask;
				this.stencilFunc = source.stencilFunc;
				this.stencilRef = source.stencilRef;
				this.stencilFuncMask = source.stencilFuncMask;
				this.stencilFail = source.stencilFail;
				this.stencilZFail = source.stencilZFail;
				this.stencilZPass = source.stencilZPass;
				this.stencilWrite = source.stencilWrite;

				var srcPlanes = source.clippingPlanes;
				var dstPlanes = null;

				if ( srcPlanes !== null ) {

					var n = srcPlanes.length;
					dstPlanes = new Array( n );

					for ( var i = 0; i !== n; ++ i ) {

						dstPlanes[ i ] = srcPlanes[ i ].clone();

					}

				}

				this.clippingPlanes = dstPlanes;
				this.clipIntersection = source.clipIntersection;
				this.clipShadows = source.clipShadows;

				this.shadowSide = source.shadowSide;

				this.colorWrite = source.colorWrite;

				this.precision = source.precision;

				this.polygonOffset = source.polygonOffset;
				this.polygonOffsetFactor = source.polygonOffsetFactor;
				this.polygonOffsetUnits = source.polygonOffsetUnits;

				this.dithering = source.dithering;

				this.alphaTest = source.alphaTest;
				this.premultipliedAlpha = source.premultipliedAlpha;

				this.visible = source.visible;

				this.toneMapped = source.toneMapped;

				this.userData = JSON.parse( JSON.stringify( source.userData ) );

				return this;

			},

			dispose: function () {

				this.dispatchEvent( { type: 'dispose' } );

			}

		} );

		Object.defineProperty( Material.prototype, 'needsUpdate', {

			set: function ( value ) {

				if ( value === true ) { this.version ++; }

			}

		} );

		/**
		 * parameters = {
		 *  color: <hex>,
		 *  opacity: <float>,
		 *  map: new THREE.Texture( <Image> ),
		 *
		 *  lightMap: new THREE.Texture( <Image> ),
		 *  lightMapIntensity: <float>
		 *
		 *  aoMap: new THREE.Texture( <Image> ),
		 *  aoMapIntensity: <float>
		 *
		 *  specularMap: new THREE.Texture( <Image> ),
		 *
		 *  alphaMap: new THREE.Texture( <Image> ),
		 *
		 *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),
		 *  combine: THREE.Multiply,
		 *  reflectivity: <float>,
		 *  refractionRatio: <float>,
		 *
		 *  depthTest: <bool>,
		 *  depthWrite: <bool>,
		 *
		 *  wireframe: <boolean>,
		 *  wireframeLinewidth: <float>,
		 *
		 *  skinning: <bool>,
		 *  morphTargets: <bool>
		 * }
		 */

		function MeshBasicMaterial( parameters ) {

			Material.call( this );

			this.type = 'MeshBasicMaterial';

			this.color = new Color( 0xffffff ); // emissive

			this.map = null;

			this.lightMap = null;
			this.lightMapIntensity = 1.0;

			this.aoMap = null;
			this.aoMapIntensity = 1.0;

			this.specularMap = null;

			this.alphaMap = null;

			this.envMap = null;
			this.combine = MultiplyOperation;
			this.reflectivity = 1;
			this.refractionRatio = 0.98;

			this.wireframe = false;
			this.wireframeLinewidth = 1;
			this.wireframeLinecap = 'round';
			this.wireframeLinejoin = 'round';

			this.skinning = false;
			this.morphTargets = false;

			this.setValues( parameters );

		}

		MeshBasicMaterial.prototype = Object.create( Material.prototype );
		MeshBasicMaterial.prototype.constructor = MeshBasicMaterial;

		MeshBasicMaterial.prototype.isMeshBasicMaterial = true;

		MeshBasicMaterial.prototype.copy = function ( source ) {

			Material.prototype.copy.call( this, source );

			this.color.copy( source.color );

			this.map = source.map;

			this.lightMap = source.lightMap;
			this.lightMapIntensity = source.lightMapIntensity;

			this.aoMap = source.aoMap;
			this.aoMapIntensity = source.aoMapIntensity;

			this.specularMap = source.specularMap;

			this.alphaMap = source.alphaMap;

			this.envMap = source.envMap;
			this.combine = source.combine;
			this.reflectivity = source.reflectivity;
			this.refractionRatio = source.refractionRatio;

			this.wireframe = source.wireframe;
			this.wireframeLinewidth = source.wireframeLinewidth;
			this.wireframeLinecap = source.wireframeLinecap;
			this.wireframeLinejoin = source.wireframeLinejoin;

			this.skinning = source.skinning;
			this.morphTargets = source.morphTargets;

			return this;

		};

		var _vector$3 = new Vector3();
		var _vector2$1 = new Vector2();

		function BufferAttribute( array, itemSize, normalized ) {

			if ( Array.isArray( array ) ) {

				throw new TypeError( 'THREE.BufferAttribute: array should be a Typed Array.' );

			}

			this.name = '';

			this.array = array;
			this.itemSize = itemSize;
			this.count = array !== undefined ? array.length / itemSize : 0;
			this.normalized = normalized === true;

			this.usage = StaticDrawUsage;
			this.updateRange = { offset: 0, count: - 1 };

			this.version = 0;

		}

		Object.defineProperty( BufferAttribute.prototype, 'needsUpdate', {

			set: function ( value ) {

				if ( value === true ) { this.version ++; }

			}

		} );

		Object.assign( BufferAttribute.prototype, {

			isBufferAttribute: true,

			onUploadCallback: function () {},

			setUsage: function ( value ) {

				this.usage = value;

				return this;

			},

			copy: function ( source ) {

				this.name = source.name;
				this.array = new source.array.constructor( source.array );
				this.itemSize = source.itemSize;
				this.count = source.count;
				this.normalized = source.normalized;

				this.usage = source.usage;

				return this;

			},

			copyAt: function ( index1, attribute, index2 ) {

				index1 *= this.itemSize;
				index2 *= attribute.itemSize;

				for ( var i = 0, l = this.itemSize; i < l; i ++ ) {

					this.array[ index1 + i ] = attribute.array[ index2 + i ];

				}

				return this;

			},

			copyArray: function ( array ) {

				this.array.set( array );

				return this;

			},

			copyColorsArray: function ( colors ) {

				var array = this.array;
				var offset = 0;

				for ( var i = 0, l = colors.length; i < l; i ++ ) {

					var color = colors[ i ];

					if ( color === undefined ) {

						console.warn( 'THREE.BufferAttribute.copyColorsArray(): color is undefined', i );
						color = new Color();

					}

					array[ offset ++ ] = color.r;
					array[ offset ++ ] = color.g;
					array[ offset ++ ] = color.b;

				}

				return this;

			},

			copyVector2sArray: function ( vectors ) {

				var array = this.array;
				var offset = 0;

				for ( var i = 0, l = vectors.length; i < l; i ++ ) {

					var vector = vectors[ i ];

					if ( vector === undefined ) {

						console.warn( 'THREE.BufferAttribute.copyVector2sArray(): vector is undefined', i );
						vector = new Vector2();

					}

					array[ offset ++ ] = vector.x;
					array[ offset ++ ] = vector.y;

				}

				return this;

			},

			copyVector3sArray: function ( vectors ) {

				var array = this.array;
				var offset = 0;

				for ( var i = 0, l = vectors.length; i < l; i ++ ) {

					var vector = vectors[ i ];

					if ( vector === undefined ) {

						console.warn( 'THREE.BufferAttribute.copyVector3sArray(): vector is undefined', i );
						vector = new Vector3();

					}

					array[ offset ++ ] = vector.x;
					array[ offset ++ ] = vector.y;
					array[ offset ++ ] = vector.z;

				}

				return this;

			},

			copyVector4sArray: function ( vectors ) {

				var array = this.array;
				var offset = 0;

				for ( var i = 0, l = vectors.length; i < l; i ++ ) {

					var vector = vectors[ i ];

					if ( vector === undefined ) {

						console.warn( 'THREE.BufferAttribute.copyVector4sArray(): vector is undefined', i );
						vector = new Vector4();

					}

					array[ offset ++ ] = vector.x;
					array[ offset ++ ] = vector.y;
					array[ offset ++ ] = vector.z;
					array[ offset ++ ] = vector.w;

				}

				return this;

			},

			applyMatrix3: function ( m ) {

				if ( this.itemSize === 2 ) {

					for ( var i = 0, l = this.count; i < l; i ++ ) {

						_vector2$1.fromBufferAttribute( this, i );
						_vector2$1.applyMatrix3( m );

						this.setXY( i, _vector2$1.x, _vector2$1.y );

					}

				} else if ( this.itemSize === 3 ) {

					for ( var i$1 = 0, l$1 = this.count; i$1 < l$1; i$1 ++ ) {

						_vector$3.fromBufferAttribute( this, i$1 );
						_vector$3.applyMatrix3( m );

						this.setXYZ( i$1, _vector$3.x, _vector$3.y, _vector$3.z );

					}

				}

				return this;

			},

			applyMatrix4: function ( m ) {

				for ( var i = 0, l = this.count; i < l; i ++ ) {

					_vector$3.x = this.getX( i );
					_vector$3.y = this.getY( i );
					_vector$3.z = this.getZ( i );

					_vector$3.applyMatrix4( m );

					this.setXYZ( i, _vector$3.x, _vector$3.y, _vector$3.z );

				}

				return this;

			},

			applyNormalMatrix: function ( m ) {

				for ( var i = 0, l = this.count; i < l; i ++ ) {

					_vector$3.x = this.getX( i );
					_vector$3.y = this.getY( i );
					_vector$3.z = this.getZ( i );

					_vector$3.applyNormalMatrix( m );

					this.setXYZ( i, _vector$3.x, _vector$3.y, _vector$3.z );

				}

				return this;

			},

			transformDirection: function ( m ) {

				for ( var i = 0, l = this.count; i < l; i ++ ) {

					_vector$3.x = this.getX( i );
					_vector$3.y = this.getY( i );
					_vector$3.z = this.getZ( i );

					_vector$3.transformDirection( m );

					this.setXYZ( i, _vector$3.x, _vector$3.y, _vector$3.z );

				}

				return this;

			},

			set: function ( value, offset ) {

				if ( offset === undefined ) { offset = 0; }

				this.array.set( value, offset );

				return this;

			},

			getX: function ( index ) {

				return this.array[ index * this.itemSize ];

			},

			setX: function ( index, x ) {

				this.array[ index * this.itemSize ] = x;

				return this;

			},

			getY: function ( index ) {

				return this.array[ index * this.itemSize + 1 ];

			},

			setY: function ( index, y ) {

				this.array[ index * this.itemSize + 1 ] = y;

				return this;

			},

			getZ: function ( index ) {

				return this.array[ index * this.itemSize + 2 ];

			},

			setZ: function ( index, z ) {

				this.array[ index * this.itemSize + 2 ] = z;

				return this;

			},

			getW: function ( index ) {

				return this.array[ index * this.itemSize + 3 ];

			},

			setW: function ( index, w ) {

				this.array[ index * this.itemSize + 3 ] = w;

				return this;

			},

			setXY: function ( index, x, y ) {

				index *= this.itemSize;

				this.array[ index + 0 ] = x;
				this.array[ index + 1 ] = y;

				return this;

			},

			setXYZ: function ( index, x, y, z ) {

				index *= this.itemSize;

				this.array[ index + 0 ] = x;
				this.array[ index + 1 ] = y;
				this.array[ index + 2 ] = z;

				return this;

			},

			setXYZW: function ( index, x, y, z, w ) {

				index *= this.itemSize;

				this.array[ index + 0 ] = x;
				this.array[ index + 1 ] = y;
				this.array[ index + 2 ] = z;
				this.array[ index + 3 ] = w;

				return this;

			},

			onUpload: function ( callback ) {

				this.onUploadCallback = callback;

				return this;

			},

			clone: function () {

				return new this.constructor( this.array, this.itemSize ).copy( this );

			},

			toJSON: function () {

				return {
					itemSize: this.itemSize,
					type: this.array.constructor.name,
					array: Array.prototype.slice.call( this.array ),
					normalized: this.normalized
				};

			}

		} );

		//

		function Int8BufferAttribute( array, itemSize, normalized ) {

			BufferAttribute.call( this, new Int8Array( array ), itemSize, normalized );

		}

		Int8BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
		Int8BufferAttribute.prototype.constructor = Int8BufferAttribute;


		function Uint8BufferAttribute( array, itemSize, normalized ) {

			BufferAttribute.call( this, new Uint8Array( array ), itemSize, normalized );

		}

		Uint8BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
		Uint8BufferAttribute.prototype.constructor = Uint8BufferAttribute;


		function Uint8ClampedBufferAttribute( array, itemSize, normalized ) {

			BufferAttribute.call( this, new Uint8ClampedArray( array ), itemSize, normalized );

		}

		Uint8ClampedBufferAttribute.prototype = Object.create( BufferAttribute.prototype );
		Uint8ClampedBufferAttribute.prototype.constructor = Uint8ClampedBufferAttribute;


		function Int16BufferAttribute( array, itemSize, normalized ) {

			BufferAttribute.call( this, new Int16Array( array ), itemSize, normalized );

		}

		Int16BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
		Int16BufferAttribute.prototype.constructor = Int16BufferAttribute;


		function Uint16BufferAttribute( array, itemSize, normalized ) {

			BufferAttribute.call( this, new Uint16Array( array ), itemSize, normalized );

		}

		Uint16BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
		Uint16BufferAttribute.prototype.constructor = Uint16BufferAttribute;


		function Int32BufferAttribute( array, itemSize, normalized ) {

			BufferAttribute.call( this, new Int32Array( array ), itemSize, normalized );

		}

		Int32BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
		Int32BufferAttribute.prototype.constructor = Int32BufferAttribute;


		function Uint32BufferAttribute( array, itemSize, normalized ) {

			BufferAttribute.call( this, new Uint32Array( array ), itemSize, normalized );

		}

		Uint32BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
		Uint32BufferAttribute.prototype.constructor = Uint32BufferAttribute;


		function Float32BufferAttribute( array, itemSize, normalized ) {

			BufferAttribute.call( this, new Float32Array( array ), itemSize, normalized );

		}

		Float32BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
		Float32BufferAttribute.prototype.constructor = Float32BufferAttribute;


		function Float64BufferAttribute( array, itemSize, normalized ) {

			BufferAttribute.call( this, new Float64Array( array ), itemSize, normalized );

		}

		Float64BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
		Float64BufferAttribute.prototype.constructor = Float64BufferAttribute;

		var DirectGeometry = function DirectGeometry() {

			this.vertices = [];
			this.normals = [];
			this.colors = [];
			this.uvs = [];
			this.uvs2 = [];

			this.groups = [];

			this.morphTargets = {};

			this.skinWeights = [];
			this.skinIndices = [];

			// this.lineDistances = [];

			this.boundingBox = null;
			this.boundingSphere = null;

			// update flags

			this.verticesNeedUpdate = false;
			this.normalsNeedUpdate = false;
			this.colorsNeedUpdate = false;
			this.uvsNeedUpdate = false;
			this.groupsNeedUpdate = false;

		};

		DirectGeometry.prototype.computeGroups = function computeGroups ( geometry ) {

			var groups = [];

			var group, i;
			var materialIndex = undefined;

			var faces = geometry.faces;

			for ( i = 0; i < faces.length; i ++ ) {

				var face = faces[ i ];

				// materials

				if ( face.materialIndex !== materialIndex ) {

					materialIndex = face.materialIndex;

					if ( group !== undefined ) {

						group.count = ( i * 3 ) - group.start;
						groups.push( group );

					}

					group = {
						start: i * 3,
						materialIndex: materialIndex
					};

				}

			}

			if ( group !== undefined ) {

				group.count = ( i * 3 ) - group.start;
				groups.push( group );

			}

			this.groups = groups;

		};

		DirectGeometry.prototype.fromGeometry = function fromGeometry ( geometry ) {

			var faces = geometry.faces;
			var vertices = geometry.vertices;
			var faceVertexUvs = geometry.faceVertexUvs;

			var hasFaceVertexUv = faceVertexUvs[ 0 ] && faceVertexUvs[ 0 ].length > 0;
			var hasFaceVertexUv2 = faceVertexUvs[ 1 ] && faceVertexUvs[ 1 ].length > 0;

			// morphs

			var morphTargets = geometry.morphTargets;
			var morphTargetsLength = morphTargets.length;

			var morphTargetsPosition;

			if ( morphTargetsLength > 0 ) {

				morphTargetsPosition = [];

				for ( var i = 0; i < morphTargetsLength; i ++ ) {

					morphTargetsPosition[ i ] = {
						name: morphTargets[ i ].name,
						 data: []
					};

				}

				this.morphTargets.position = morphTargetsPosition;

			}

			var morphNormals = geometry.morphNormals;
			var morphNormalsLength = morphNormals.length;

			var morphTargetsNormal;

			if ( morphNormalsLength > 0 ) {

				morphTargetsNormal = [];

				for ( var i$1 = 0; i$1 < morphNormalsLength; i$1 ++ ) {

					morphTargetsNormal[ i$1 ] = {
						name: morphNormals[ i$1 ].name,
						 data: []
					};

				}

				this.morphTargets.normal = morphTargetsNormal;

			}

			// skins

			var skinIndices = geometry.skinIndices;
			var skinWeights = geometry.skinWeights;

			var hasSkinIndices = skinIndices.length === vertices.length;
			var hasSkinWeights = skinWeights.length === vertices.length;

			//

			if ( vertices.length > 0 && faces.length === 0 ) {

				console.error( 'THREE.DirectGeometry: Faceless geometries are not supported.' );

			}

			for ( var i$2 = 0; i$2 < faces.length; i$2 ++ ) {

				var face = faces[ i$2 ];

				this.vertices.push( vertices[ face.a ], vertices[ face.b ], vertices[ face.c ] );

				var vertexNormals = face.vertexNormals;

				if ( vertexNormals.length === 3 ) {

					this.normals.push( vertexNormals[ 0 ], vertexNormals[ 1 ], vertexNormals[ 2 ] );

				} else {

					var normal = face.normal;

					this.normals.push( normal, normal, normal );

				}

				var vertexColors = face.vertexColors;

				if ( vertexColors.length === 3 ) {

					this.colors.push( vertexColors[ 0 ], vertexColors[ 1 ], vertexColors[ 2 ] );

				} else {

					var color = face.color;

					this.colors.push( color, color, color );

				}

				if ( hasFaceVertexUv === true ) {

					var vertexUvs = faceVertexUvs[ 0 ][ i$2 ];

					if ( vertexUvs !== undefined ) {

						this.uvs.push( vertexUvs[ 0 ], vertexUvs[ 1 ], vertexUvs[ 2 ] );

					} else {

						console.warn( 'THREE.DirectGeometry.fromGeometry(): Undefined vertexUv ', i$2 );

						this.uvs.push( new Vector2(), new Vector2(), new Vector2() );

					}

				}

				if ( hasFaceVertexUv2 === true ) {

					var vertexUvs$1 = faceVertexUvs[ 1 ][ i$2 ];

					if ( vertexUvs$1 !== undefined ) {

						this.uvs2.push( vertexUvs$1[ 0 ], vertexUvs$1[ 1 ], vertexUvs$1[ 2 ] );

					} else {

						console.warn( 'THREE.DirectGeometry.fromGeometry(): Undefined vertexUv2 ', i$2 );

						this.uvs2.push( new Vector2(), new Vector2(), new Vector2() );

					}

				}

				// morphs

				for ( var j = 0; j < morphTargetsLength; j ++ ) {

					var morphTarget = morphTargets[ j ].vertices;

					morphTargetsPosition[ j ].data.push( morphTarget[ face.a ], morphTarget[ face.b ], morphTarget[ face.c ] );

				}

				for ( var j$1 = 0; j$1 < morphNormalsLength; j$1 ++ ) {

					var morphNormal = morphNormals[ j$1 ].vertexNormals[ i$2 ];

					morphTargetsNormal[ j$1 ].data.push( morphNormal.a, morphNormal.b, morphNormal.c );

				}

				// skins

				if ( hasSkinIndices ) {

					this.skinIndices.push( skinIndices[ face.a ], skinIndices[ face.b ], skinIndices[ face.c ] );

				}

				if ( hasSkinWeights ) {

					this.skinWeights.push( skinWeights[ face.a ], skinWeights[ face.b ], skinWeights[ face.c ] );

				}

			}

			this.computeGroups( geometry );

			this.verticesNeedUpdate = geometry.verticesNeedUpdate;
			this.normalsNeedUpdate = geometry.normalsNeedUpdate;
			this.colorsNeedUpdate = geometry.colorsNeedUpdate;
			this.uvsNeedUpdate = geometry.uvsNeedUpdate;
			this.groupsNeedUpdate = geometry.groupsNeedUpdate;

			if ( geometry.boundingSphere !== null ) {

				this.boundingSphere = geometry.boundingSphere.clone();

			}

			if ( geometry.boundingBox !== null ) {

				this.boundingBox = geometry.boundingBox.clone();

			}

			return this;

		};

		function arrayMax( array ) {

			if ( array.length === 0 ) { return - Infinity; }

			var max = array[ 0 ];

			for ( var i = 1, l = array.length; i < l; ++ i ) {

				if ( array[ i ] > max ) { max = array[ i ]; }

			}

			return max;

		}

		var _bufferGeometryId = 1; // BufferGeometry uses odd numbers as Id

		var _m1$2 = new Matrix4();
		var _obj = new Object3D();
		var _offset = new Vector3();
		var _box$2 = new Box3();
		var _boxMorphTargets = new Box3();
		var _vector$4 = new Vector3();

		function BufferGeometry() {

			Object.defineProperty( this, 'id', { value: _bufferGeometryId += 2 } );

			this.uuid = MathUtils.generateUUID();

			this.name = '';
			this.type = 'BufferGeometry';

			this.index = null;
			this.attributes = {};

			this.morphAttributes = {};
			this.morphTargetsRelative = false;

			this.groups = [];

			this.boundingBox = null;
			this.boundingSphere = null;

			this.drawRange = { start: 0, count: Infinity };

			this.userData = {};

		}

		BufferGeometry.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {

			constructor: BufferGeometry,

			isBufferGeometry: true,

			getIndex: function () {

				return this.index;

			},

			setIndex: function ( index ) {

				if ( Array.isArray( index ) ) {

					this.index = new ( arrayMax( index ) > 65535 ? Uint32BufferAttribute : Uint16BufferAttribute )( index, 1 );

				} else {

					this.index = index;

				}

			},

			getAttribute: function ( name ) {

				return this.attributes[ name ];

			},

			setAttribute: function ( name, attribute ) {

				this.attributes[ name ] = attribute;

				return this;

			},

			deleteAttribute: function ( name ) {

				delete this.attributes[ name ];

				return this;

			},

			addGroup: function ( start, count, materialIndex ) {

				this.groups.push( {

					start: start,
					count: count,
					materialIndex: materialIndex !== undefined ? materialIndex : 0

				} );

			},

			clearGroups: function () {

				this.groups = [];

			},

			setDrawRange: function ( start, count ) {

				this.drawRange.start = start;
				this.drawRange.count = count;

			},

			applyMatrix4: function ( matrix ) {

				var position = this.attributes.position;

				if ( position !== undefined ) {

					position.applyMatrix4( matrix );

					position.needsUpdate = true;

				}

				var normal = this.attributes.normal;

				if ( normal !== undefined ) {

					var normalMatrix = new Matrix3().getNormalMatrix( matrix );

					normal.applyNormalMatrix( normalMatrix );

					normal.needsUpdate = true;

				}

				var tangent = this.attributes.tangent;

				if ( tangent !== undefined ) {

					tangent.transformDirection( matrix );

					tangent.needsUpdate = true;

				}

				if ( this.boundingBox !== null ) {

					this.computeBoundingBox();

				}

				if ( this.boundingSphere !== null ) {

					this.computeBoundingSphere();

				}

				return this;

			},

			rotateX: function ( angle ) {

				// rotate geometry around world x-axis

				_m1$2.makeRotationX( angle );

				this.applyMatrix4( _m1$2 );

				return this;

			},

			rotateY: function ( angle ) {

				// rotate geometry around world y-axis

				_m1$2.makeRotationY( angle );

				this.applyMatrix4( _m1$2 );

				return this;

			},

			rotateZ: function ( angle ) {

				// rotate geometry around world z-axis

				_m1$2.makeRotationZ( angle );

				this.applyMatrix4( _m1$2 );

				return this;

			},

			translate: function ( x, y, z ) {

				// translate geometry

				_m1$2.makeTranslation( x, y, z );

				this.applyMatrix4( _m1$2 );

				return this;

			},

			scale: function ( x, y, z ) {

				// scale geometry

				_m1$2.makeScale( x, y, z );

				this.applyMatrix4( _m1$2 );

				return this;

			},

			lookAt: function ( vector ) {

				_obj.lookAt( vector );

				_obj.updateMatrix();

				this.applyMatrix4( _obj.matrix );

				return this;

			},

			center: function () {

				this.computeBoundingBox();

				this.boundingBox.getCenter( _offset ).negate();

				this.translate( _offset.x, _offset.y, _offset.z );

				return this;

			},

			setFromObject: function ( object ) {

				// console.log( 'THREE.BufferGeometry.setFromObject(). Converting', object, this );

				var geometry = object.geometry;

				if ( object.isPoints || object.isLine ) {

					var positions = new Float32BufferAttribute( geometry.vertices.length * 3, 3 );
					var colors = new Float32BufferAttribute( geometry.colors.length * 3, 3 );

					this.setAttribute( 'position', positions.copyVector3sArray( geometry.vertices ) );
					this.setAttribute( 'color', colors.copyColorsArray( geometry.colors ) );

					if ( geometry.lineDistances && geometry.lineDistances.length === geometry.vertices.length ) {

						var lineDistances = new Float32BufferAttribute( geometry.lineDistances.length, 1 );

						this.setAttribute( 'lineDistance', lineDistances.copyArray( geometry.lineDistances ) );

					}

					if ( geometry.boundingSphere !== null ) {

						this.boundingSphere = geometry.boundingSphere.clone();

					}

					if ( geometry.boundingBox !== null ) {

						this.boundingBox = geometry.boundingBox.clone();

					}

				} else if ( object.isMesh ) {

					if ( geometry && geometry.isGeometry ) {

						this.fromGeometry( geometry );

					}

				}

				return this;

			},

			setFromPoints: function ( points ) {

				var position = [];

				for ( var i = 0, l = points.length; i < l; i ++ ) {

					var point = points[ i ];
					position.push( point.x, point.y, point.z || 0 );

				}

				this.setAttribute( 'position', new Float32BufferAttribute( position, 3 ) );

				return this;

			},

			updateFromObject: function ( object ) {

				var geometry = object.geometry;

				if ( object.isMesh ) {

					var direct = geometry.__directGeometry;

					if ( geometry.elementsNeedUpdate === true ) {

						direct = undefined;
						geometry.elementsNeedUpdate = false;

					}

					if ( direct === undefined ) {

						return this.fromGeometry( geometry );

					}

					direct.verticesNeedUpdate = geometry.verticesNeedUpdate;
					direct.normalsNeedUpdate = geometry.normalsNeedUpdate;
					direct.colorsNeedUpdate = geometry.colorsNeedUpdate;
					direct.uvsNeedUpdate = geometry.uvsNeedUpdate;
					direct.groupsNeedUpdate = geometry.groupsNeedUpdate;

					geometry.verticesNeedUpdate = false;
					geometry.normalsNeedUpdate = false;
					geometry.colorsNeedUpdate = false;
					geometry.uvsNeedUpdate = false;
					geometry.groupsNeedUpdate = false;

					geometry = direct;

				}

				if ( geometry.verticesNeedUpdate === true ) {

					var attribute = this.attributes.position;

					if ( attribute !== undefined ) {

						attribute.copyVector3sArray( geometry.vertices );
						attribute.needsUpdate = true;

					}

					geometry.verticesNeedUpdate = false;

				}

				if ( geometry.normalsNeedUpdate === true ) {

					var attribute$1 = this.attributes.normal;

					if ( attribute$1 !== undefined ) {

						attribute$1.copyVector3sArray( geometry.normals );
						attribute$1.needsUpdate = true;

					}

					geometry.normalsNeedUpdate = false;

				}

				if ( geometry.colorsNeedUpdate === true ) {

					var attribute$2 = this.attributes.color;

					if ( attribute$2 !== undefined ) {

						attribute$2.copyColorsArray( geometry.colors );
						attribute$2.needsUpdate = true;

					}

					geometry.colorsNeedUpdate = false;

				}

				if ( geometry.uvsNeedUpdate ) {

					var attribute$3 = this.attributes.uv;

					if ( attribute$3 !== undefined ) {

						attribute$3.copyVector2sArray( geometry.uvs );
						attribute$3.needsUpdate = true;

					}

					geometry.uvsNeedUpdate = false;

				}

				if ( geometry.lineDistancesNeedUpdate ) {

					var attribute$4 = this.attributes.lineDistance;

					if ( attribute$4 !== undefined ) {

						attribute$4.copyArray( geometry.lineDistances );
						attribute$4.needsUpdate = true;

					}

					geometry.lineDistancesNeedUpdate = false;

				}

				if ( geometry.groupsNeedUpdate ) {

					geometry.computeGroups( object.geometry );
					this.groups = geometry.groups;

					geometry.groupsNeedUpdate = false;

				}

				return this;

			},

			fromGeometry: function ( geometry ) {

				geometry.__directGeometry = new DirectGeometry().fromGeometry( geometry );

				return this.fromDirectGeometry( geometry.__directGeometry );

			},

			fromDirectGeometry: function ( geometry ) {

				var positions = new Float32Array( geometry.vertices.length * 3 );
				this.setAttribute( 'position', new BufferAttribute( positions, 3 ).copyVector3sArray( geometry.vertices ) );

				if ( geometry.normals.length > 0 ) {

					var normals = new Float32Array( geometry.normals.length * 3 );
					this.setAttribute( 'normal', new BufferAttribute( normals, 3 ).copyVector3sArray( geometry.normals ) );

				}

				if ( geometry.colors.length > 0 ) {

					var colors = new Float32Array( geometry.colors.length * 3 );
					this.setAttribute( 'color', new BufferAttribute( colors, 3 ).copyColorsArray( geometry.colors ) );

				}

				if ( geometry.uvs.length > 0 ) {

					var uvs = new Float32Array( geometry.uvs.length * 2 );
					this.setAttribute( 'uv', new BufferAttribute( uvs, 2 ).copyVector2sArray( geometry.uvs ) );

				}

				if ( geometry.uvs2.length > 0 ) {

					var uvs2 = new Float32Array( geometry.uvs2.length * 2 );
					this.setAttribute( 'uv2', new BufferAttribute( uvs2, 2 ).copyVector2sArray( geometry.uvs2 ) );

				}

				// groups

				this.groups = geometry.groups;

				// morphs

				for ( var name in geometry.morphTargets ) {

					var array = [];
					var morphTargets = geometry.morphTargets[ name ];

					for ( var i = 0, l = morphTargets.length; i < l; i ++ ) {

						var morphTarget = morphTargets[ i ];

						var attribute = new Float32BufferAttribute( morphTarget.data.length * 3, 3 );
						attribute.name = morphTarget.name;

						array.push( attribute.copyVector3sArray( morphTarget.data ) );

					}

					this.morphAttributes[ name ] = array;

				}

				// skinning

				if ( geometry.skinIndices.length > 0 ) {

					var skinIndices = new Float32BufferAttribute( geometry.skinIndices.length * 4, 4 );
					this.setAttribute( 'skinIndex', skinIndices.copyVector4sArray( geometry.skinIndices ) );

				}

				if ( geometry.skinWeights.length > 0 ) {

					var skinWeights = new Float32BufferAttribute( geometry.skinWeights.length * 4, 4 );
					this.setAttribute( 'skinWeight', skinWeights.copyVector4sArray( geometry.skinWeights ) );

				}

				//

				if ( geometry.boundingSphere !== null ) {

					this.boundingSphere = geometry.boundingSphere.clone();

				}

				if ( geometry.boundingBox !== null ) {

					this.boundingBox = geometry.boundingBox.clone();

				}

				return this;

			},

			computeBoundingBox: function () {

				if ( this.boundingBox === null ) {

					this.boundingBox = new Box3();

				}

				var position = this.attributes.position;
				var morphAttributesPosition = this.morphAttributes.position;

				if ( position && position.isGLBufferAttribute ) {

					console.error( 'THREE.BufferGeometry.computeBoundingBox(): GLBufferAttribute requires a manual bounding box. Alternatively set "mesh.frustumCulled" to "false".', this );

					this.boundingBox.set(
						new Vector3( - Infinity, - Infinity, - Infinity ),
						new Vector3( + Infinity, + Infinity, + Infinity )
					);

					return;

				}

				if ( position !== undefined ) {

					this.boundingBox.setFromBufferAttribute( position );

					// process morph attributes if present

					if ( morphAttributesPosition ) {

						for ( var i = 0, il = morphAttributesPosition.length; i < il; i ++ ) {

							var morphAttribute = morphAttributesPosition[ i ];
							_box$2.setFromBufferAttribute( morphAttribute );

							if ( this.morphTargetsRelative ) {

								_vector$4.addVectors( this.boundingBox.min, _box$2.min );
								this.boundingBox.expandByPoint( _vector$4 );

								_vector$4.addVectors( this.boundingBox.max, _box$2.max );
								this.boundingBox.expandByPoint( _vector$4 );

							} else {

								this.boundingBox.expandByPoint( _box$2.min );
								this.boundingBox.expandByPoint( _box$2.max );

							}

						}

					}

				} else {

					this.boundingBox.makeEmpty();

				}

				if ( isNaN( this.boundingBox.min.x ) || isNaN( this.boundingBox.min.y ) || isNaN( this.boundingBox.min.z ) ) {

					console.error( 'THREE.BufferGeometry.computeBoundingBox(): Computed min/max have NaN values. The "position" attribute is likely to have NaN values.', this );

				}

			},

			computeBoundingSphere: function () {

				if ( this.boundingSphere === null ) {

					this.boundingSphere = new Sphere();

				}

				var position = this.attributes.position;
				var morphAttributesPosition = this.morphAttributes.position;

				if ( position && position.isGLBufferAttribute ) {

					console.error( 'THREE.BufferGeometry.computeBoundingSphere(): GLBufferAttribute requires a manual bounding sphere. Alternatively set "mesh.frustumCulled" to "false".', this );

					this.boundingSphere.set( new Vector3(), Infinity );

					return;

				}

				if ( position ) {

					// first, find the center of the bounding sphere

					var center = this.boundingSphere.center;

					_box$2.setFromBufferAttribute( position );

					// process morph attributes if present

					if ( morphAttributesPosition ) {

						for ( var i = 0, il = morphAttributesPosition.length; i < il; i ++ ) {

							var morphAttribute = morphAttributesPosition[ i ];
							_boxMorphTargets.setFromBufferAttribute( morphAttribute );

							if ( this.morphTargetsRelative ) {

								_vector$4.addVectors( _box$2.min, _boxMorphTargets.min );
								_box$2.expandByPoint( _vector$4 );

								_vector$4.addVectors( _box$2.max, _boxMorphTargets.max );
								_box$2.expandByPoint( _vector$4 );

							} else {

								_box$2.expandByPoint( _boxMorphTargets.min );
								_box$2.expandByPoint( _boxMorphTargets.max );

							}

						}

					}

					_box$2.getCenter( center );

					// second, try to find a boundingSphere with a radius smaller than the
					// boundingSphere of the boundingBox: sqrt(3) smaller in the best case

					var maxRadiusSq = 0;

					for ( var i$1 = 0, il$1 = position.count; i$1 < il$1; i$1 ++ ) {

						_vector$4.fromBufferAttribute( position, i$1 );

						maxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( _vector$4 ) );

					}

					// process morph attributes if present

					if ( morphAttributesPosition ) {

						for ( var i$2 = 0, il$2 = morphAttributesPosition.length; i$2 < il$2; i$2 ++ ) {

							var morphAttribute$1 = morphAttributesPosition[ i$2 ];
							var morphTargetsRelative = this.morphTargetsRelative;

							for ( var j = 0, jl = morphAttribute$1.count; j < jl; j ++ ) {

								_vector$4.fromBufferAttribute( morphAttribute$1, j );

								if ( morphTargetsRelative ) {

									_offset.fromBufferAttribute( position, j );
									_vector$4.add( _offset );

								}

								maxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( _vector$4 ) );

							}

						}

					}

					this.boundingSphere.radius = Math.sqrt( maxRadiusSq );

					if ( isNaN( this.boundingSphere.radius ) ) {

						console.error( 'THREE.BufferGeometry.computeBoundingSphere(): Computed radius is NaN. The "position" attribute is likely to have NaN values.', this );

					}

				}

			},

			computeFaceNormals: function () {

				// backwards compatibility

			},

			computeVertexNormals: function () {

				var index = this.index;
				var positionAttribute = this.getAttribute( 'position' );

				if ( positionAttribute !== undefined ) {

					var normalAttribute = this.getAttribute( 'normal' );

					if ( normalAttribute === undefined ) {

						normalAttribute = new BufferAttribute( new Float32Array( positionAttribute.count * 3 ), 3 );
						this.setAttribute( 'normal', normalAttribute );

					} else {

						// reset existing normals to zero

						for ( var i = 0, il = normalAttribute.count; i < il; i ++ ) {

							normalAttribute.setXYZ( i, 0, 0, 0 );

						}

					}

					var pA = new Vector3(), pB = new Vector3(), pC = new Vector3();
					var nA = new Vector3(), nB = new Vector3(), nC = new Vector3();
					var cb = new Vector3(), ab = new Vector3();

					// indexed elements

					if ( index ) {

						for ( var i$1 = 0, il$1 = index.count; i$1 < il$1; i$1 += 3 ) {

							var vA = index.getX( i$1 + 0 );
							var vB = index.getX( i$1 + 1 );
							var vC = index.getX( i$1 + 2 );

							pA.fromBufferAttribute( positionAttribute, vA );
							pB.fromBufferAttribute( positionAttribute, vB );
							pC.fromBufferAttribute( positionAttribute, vC );

							cb.subVectors( pC, pB );
							ab.subVectors( pA, pB );
							cb.cross( ab );

							nA.fromBufferAttribute( normalAttribute, vA );
							nB.fromBufferAttribute( normalAttribute, vB );
							nC.fromBufferAttribute( normalAttribute, vC );

							nA.add( cb );
							nB.add( cb );
							nC.add( cb );

							normalAttribute.setXYZ( vA, nA.x, nA.y, nA.z );
							normalAttribute.setXYZ( vB, nB.x, nB.y, nB.z );
							normalAttribute.setXYZ( vC, nC.x, nC.y, nC.z );

						}

					} else {

						// non-indexed elements (unconnected triangle soup)

						for ( var i$2 = 0, il$2 = positionAttribute.count; i$2 < il$2; i$2 += 3 ) {

							pA.fromBufferAttribute( positionAttribute, i$2 + 0 );
							pB.fromBufferAttribute( positionAttribute, i$2 + 1 );
							pC.fromBufferAttribute( positionAttribute, i$2 + 2 );

							cb.subVectors( pC, pB );
							ab.subVectors( pA, pB );
							cb.cross( ab );

							normalAttribute.setXYZ( i$2 + 0, cb.x, cb.y, cb.z );
							normalAttribute.setXYZ( i$2 + 1, cb.x, cb.y, cb.z );
							normalAttribute.setXYZ( i$2 + 2, cb.x, cb.y, cb.z );

						}

					}

					this.normalizeNormals();

					normalAttribute.needsUpdate = true;

				}

			},

			merge: function ( geometry, offset ) {

				if ( ! ( geometry && geometry.isBufferGeometry ) ) {

					console.error( 'THREE.BufferGeometry.merge(): geometry not an instance of THREE.BufferGeometry.', geometry );
					return;

				}

				if ( offset === undefined ) {

					offset = 0;

					console.warn(
						'THREE.BufferGeometry.merge(): Overwriting original geometry, starting at offset=0. '
						+ 'Use BufferGeometryUtils.mergeBufferGeometries() for lossless merge.'
					);

				}

				var attributes = this.attributes;

				for ( var key in attributes ) {

					if ( geometry.attributes[ key ] === undefined ) { continue; }

					var attribute1 = attributes[ key ];
					var attributeArray1 = attribute1.array;

					var attribute2 = geometry.attributes[ key ];
					var attributeArray2 = attribute2.array;

					var attributeOffset = attribute2.itemSize * offset;
					var length = Math.min( attributeArray2.length, attributeArray1.length - attributeOffset );

					for ( var i = 0, j = attributeOffset; i < length; i ++, j ++ ) {

						attributeArray1[ j ] = attributeArray2[ i ];

					}

				}

				return this;

			},

			normalizeNormals: function () {

				var normals = this.attributes.normal;

				for ( var i = 0, il = normals.count; i < il; i ++ ) {

					_vector$4.fromBufferAttribute( normals, i );

					_vector$4.normalize();

					normals.setXYZ( i, _vector$4.x, _vector$4.y, _vector$4.z );

				}

			},

			toNonIndexed: function () {

				function convertBufferAttribute( attribute, indices ) {

					var array = attribute.array;
					var itemSize = attribute.itemSize;
					var normalized = attribute.normalized;

					var array2 = new array.constructor( indices.length * itemSize );

					var index = 0, index2 = 0;

					for ( var i = 0, l = indices.length; i < l; i ++ ) {

						index = indices[ i ] * itemSize;

						for ( var j = 0; j < itemSize; j ++ ) {

							array2[ index2 ++ ] = array[ index ++ ];

						}

					}

					return new BufferAttribute( array2, itemSize, normalized );

				}

				//

				if ( this.index === null ) {

					console.warn( 'THREE.BufferGeometry.toNonIndexed(): Geometry is already non-indexed.' );
					return this;

				}

				var geometry2 = new BufferGeometry();

				var indices = this.index.array;
				var attributes = this.attributes;

				// attributes

				for ( var name in attributes ) {

					var attribute = attributes[ name ];

					var newAttribute = convertBufferAttribute( attribute, indices );

					geometry2.setAttribute( name, newAttribute );

				}

				// morph attributes

				var morphAttributes = this.morphAttributes;

				for ( var name$1 in morphAttributes ) {

					var morphArray = [];
					var morphAttribute = morphAttributes[ name$1 ]; // morphAttribute: array of Float32BufferAttributes

					for ( var i = 0, il = morphAttribute.length; i < il; i ++ ) {

						var attribute$1 = morphAttribute[ i ];

						var newAttribute$1 = convertBufferAttribute( attribute$1, indices );

						morphArray.push( newAttribute$1 );

					}

					geometry2.morphAttributes[ name$1 ] = morphArray;

				}

				geometry2.morphTargetsRelative = this.morphTargetsRelative;

				// groups

				var groups = this.groups;

				for ( var i$1 = 0, l = groups.length; i$1 < l; i$1 ++ ) {

					var group = groups[ i$1 ];
					geometry2.addGroup( group.start, group.count, group.materialIndex );

				}

				return geometry2;

			},

			toJSON: function () {

				var data = {
					metadata: {
						version: 4.5,
						type: 'BufferGeometry',
						generator: 'BufferGeometry.toJSON'
					}
				};

				// standard BufferGeometry serialization

				data.uuid = this.uuid;
				data.type = this.type;
				if ( this.name !== '' ) { data.name = this.name; }
				if ( Object.keys( this.userData ).length > 0 ) { data.userData = this.userData; }

				if ( this.parameters !== undefined ) {

					var parameters = this.parameters;

					for ( var key in parameters ) {

						if ( parameters[ key ] !== undefined ) { data[ key ] = parameters[ key ]; }

					}

					return data;

				}

				data.data = { attributes: {} };

				var index = this.index;

				if ( index !== null ) {

					data.data.index = {
						type: index.array.constructor.name,
						array: Array.prototype.slice.call( index.array )
					};

				}

				var attributes = this.attributes;

				for ( var key$1 in attributes ) {

					var attribute = attributes[ key$1 ];

					var attributeData = attribute.toJSON( data.data );

					if ( attribute.name !== '' ) { attributeData.name = attribute.name; }

					data.data.attributes[ key$1 ] = attributeData;

				}

				var morphAttributes = {};
				var hasMorphAttributes = false;

				for ( var key$2 in this.morphAttributes ) {

					var attributeArray = this.morphAttributes[ key$2 ];

					var array = [];

					for ( var i = 0, il = attributeArray.length; i < il; i ++ ) {

						var attribute$1 = attributeArray[ i ];

						var attributeData$1 = attribute$1.toJSON( data.data );

						if ( attribute$1.name !== '' ) { attributeData$1.name = attribute$1.name; }

						array.push( attributeData$1 );

					}

					if ( array.length > 0 ) {

						morphAttributes[ key$2 ] = array;

						hasMorphAttributes = true;

					}

				}

				if ( hasMorphAttributes ) {

					data.data.morphAttributes = morphAttributes;
					data.data.morphTargetsRelative = this.morphTargetsRelative;

				}

				var groups = this.groups;

				if ( groups.length > 0 ) {

					data.data.groups = JSON.parse( JSON.stringify( groups ) );

				}

				var boundingSphere = this.boundingSphere;

				if ( boundingSphere !== null ) {

					data.data.boundingSphere = {
						center: boundingSphere.center.toArray(),
						radius: boundingSphere.radius
					};

				}

				return data;

			},

			clone: function () {

				/*
				 // Handle primitives

				 const parameters = this.parameters;

				 if ( parameters !== undefined ) {

				 const values = [];

				 for ( const key in parameters ) {

				 values.push( parameters[ key ] );

				 }

				 const geometry = Object.create( this.constructor.prototype );
				 this.constructor.apply( geometry, values );
				 return geometry;

				 }

				 return new this.constructor().copy( this );
				 */

				return new BufferGeometry().copy( this );

			},

			copy: function ( source ) {

				// reset

				this.index = null;
				this.attributes = {};
				this.morphAttributes = {};
				this.groups = [];
				this.boundingBox = null;
				this.boundingSphere = null;

				// used for storing cloned, shared data

				var data = {};

				// name

				this.name = source.name;

				// index

				var index = source.index;

				if ( index !== null ) {

					this.setIndex( index.clone( data ) );

				}

				// attributes

				var attributes = source.attributes;

				for ( var name in attributes ) {

					var attribute = attributes[ name ];
					this.setAttribute( name, attribute.clone( data ) );

				}

				// morph attributes

				var morphAttributes = source.morphAttributes;

				for ( var name$1 in morphAttributes ) {

					var array = [];
					var morphAttribute = morphAttributes[ name$1 ]; // morphAttribute: array of Float32BufferAttributes

					for ( var i = 0, l = morphAttribute.length; i < l; i ++ ) {

						array.push( morphAttribute[ i ].clone( data ) );

					}

					this.morphAttributes[ name$1 ] = array;

				}

				this.morphTargetsRelative = source.morphTargetsRelative;

				// groups

				var groups = source.groups;

				for ( var i$1 = 0, l$1 = groups.length; i$1 < l$1; i$1 ++ ) {

					var group = groups[ i$1 ];
					this.addGroup( group.start, group.count, group.materialIndex );

				}

				// bounding box

				var boundingBox = source.boundingBox;

				if ( boundingBox !== null ) {

					this.boundingBox = boundingBox.clone();

				}

				// bounding sphere

				var boundingSphere = source.boundingSphere;

				if ( boundingSphere !== null ) {

					this.boundingSphere = boundingSphere.clone();

				}

				// draw range

				this.drawRange.start = source.drawRange.start;
				this.drawRange.count = source.drawRange.count;

				// user data

				this.userData = source.userData;

				return this;

			},

			dispose: function () {

				this.dispatchEvent( { type: 'dispose' } );

			}

		} );

		var _inverseMatrix = new Matrix4();
		var _ray = new Ray();
		var _sphere = new Sphere();

		var _vA = new Vector3();
		var _vB = new Vector3();
		var _vC = new Vector3();

		var _tempA = new Vector3();
		var _tempB = new Vector3();
		var _tempC = new Vector3();

		var _morphA = new Vector3();
		var _morphB = new Vector3();
		var _morphC = new Vector3();

		var _uvA = new Vector2();
		var _uvB = new Vector2();
		var _uvC = new Vector2();

		var _intersectionPoint = new Vector3();
		var _intersectionPointWorld = new Vector3();

		function Mesh( geometry, material ) {

			Object3D.call( this );

			this.type = 'Mesh';

			this.geometry = geometry !== undefined ? geometry : new BufferGeometry();
			this.material = material !== undefined ? material : new MeshBasicMaterial();

			this.updateMorphTargets();

		}

		Mesh.prototype = Object.assign( Object.create( Object3D.prototype ), {

			constructor: Mesh,

			isMesh: true,

			copy: function ( source ) {

				Object3D.prototype.copy.call( this, source );

				if ( source.morphTargetInfluences !== undefined ) {

					this.morphTargetInfluences = source.morphTargetInfluences.slice();

				}

				if ( source.morphTargetDictionary !== undefined ) {

					this.morphTargetDictionary = Object.assign( {}, source.morphTargetDictionary );

				}

				this.material = source.material;
				this.geometry = source.geometry;

				return this;

			},

			updateMorphTargets: function () {

				var geometry = this.geometry;

				if ( geometry.isBufferGeometry ) {

					var morphAttributes = geometry.morphAttributes;
					var keys = Object.keys( morphAttributes );

					if ( keys.length > 0 ) {

						var morphAttribute = morphAttributes[ keys[ 0 ] ];

						if ( morphAttribute !== undefined ) {

							this.morphTargetInfluences = [];
							this.morphTargetDictionary = {};

							for ( var m = 0, ml = morphAttribute.length; m < ml; m ++ ) {

								var name = morphAttribute[ m ].name || String( m );

								this.morphTargetInfluences.push( 0 );
								this.morphTargetDictionary[ name ] = m;

							}

						}

					}

				} else {

					var morphTargets = geometry.morphTargets;

					if ( morphTargets !== undefined && morphTargets.length > 0 ) {

						console.error( 'THREE.Mesh.updateMorphTargets() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.' );

					}

				}

			},

			raycast: function ( raycaster, intersects ) {

				var geometry = this.geometry;
				var material = this.material;
				var matrixWorld = this.matrixWorld;

				if ( material === undefined ) { return; }

				// Checking boundingSphere distance to ray

				if ( geometry.boundingSphere === null ) { geometry.computeBoundingSphere(); }

				_sphere.copy( geometry.boundingSphere );
				_sphere.applyMatrix4( matrixWorld );

				if ( raycaster.ray.intersectsSphere( _sphere ) === false ) { return; }

				//

				_inverseMatrix.getInverse( matrixWorld );
				_ray.copy( raycaster.ray ).applyMatrix4( _inverseMatrix );

				// Check boundingBox before continuing

				if ( geometry.boundingBox !== null ) {

					if ( _ray.intersectsBox( geometry.boundingBox ) === false ) { return; }

				}

				var intersection;

				if ( geometry.isBufferGeometry ) {

					var index = geometry.index;
					var position = geometry.attributes.position;
					var morphPosition = geometry.morphAttributes.position;
					var morphTargetsRelative = geometry.morphTargetsRelative;
					var uv = geometry.attributes.uv;
					var uv2 = geometry.attributes.uv2;
					var groups = geometry.groups;
					var drawRange = geometry.drawRange;

					if ( index !== null ) {

						// indexed buffer geometry

						if ( Array.isArray( material ) ) {

							for ( var i = 0, il = groups.length; i < il; i ++ ) {

								var group = groups[ i ];
								var groupMaterial = material[ group.materialIndex ];

								var start = Math.max( group.start, drawRange.start );
								var end = Math.min( ( group.start + group.count ), ( drawRange.start + drawRange.count ) );

								for ( var j = start, jl = end; j < jl; j += 3 ) {

									var a = index.getX( j );
									var b = index.getX( j + 1 );
									var c = index.getX( j + 2 );

									intersection = checkBufferGeometryIntersection( this, groupMaterial, raycaster, _ray, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c );

									if ( intersection ) {

										intersection.faceIndex = Math.floor( j / 3 ); // triangle number in indexed buffer semantics
										intersection.face.materialIndex = group.materialIndex;
										intersects.push( intersection );

									}

								}

							}

						} else {

							var start$1 = Math.max( 0, drawRange.start );
							var end$1 = Math.min( index.count, ( drawRange.start + drawRange.count ) );

							for ( var i$1 = start$1, il$1 = end$1; i$1 < il$1; i$1 += 3 ) {

								var a$1 = index.getX( i$1 );
								var b$1 = index.getX( i$1 + 1 );
								var c$1 = index.getX( i$1 + 2 );

								intersection = checkBufferGeometryIntersection( this, material, raycaster, _ray, position, morphPosition, morphTargetsRelative, uv, uv2, a$1, b$1, c$1 );

								if ( intersection ) {

									intersection.faceIndex = Math.floor( i$1 / 3 ); // triangle number in indexed buffer semantics
									intersects.push( intersection );

								}

							}

						}

					} else if ( position !== undefined ) {

						// non-indexed buffer geometry

						if ( Array.isArray( material ) ) {

							for ( var i$2 = 0, il$2 = groups.length; i$2 < il$2; i$2 ++ ) {

								var group$1 = groups[ i$2 ];
								var groupMaterial$1 = material[ group$1.materialIndex ];

								var start$2 = Math.max( group$1.start, drawRange.start );
								var end$2 = Math.min( ( group$1.start + group$1.count ), ( drawRange.start + drawRange.count ) );

								for ( var j$1 = start$2, jl$1 = end$2; j$1 < jl$1; j$1 += 3 ) {

									var a$2 = j$1;
									var b$2 = j$1 + 1;
									var c$2 = j$1 + 2;

									intersection = checkBufferGeometryIntersection( this, groupMaterial$1, raycaster, _ray, position, morphPosition, morphTargetsRelative, uv, uv2, a$2, b$2, c$2 );

									if ( intersection ) {

										intersection.faceIndex = Math.floor( j$1 / 3 ); // triangle number in non-indexed buffer semantics
										intersection.face.materialIndex = group$1.materialIndex;
										intersects.push( intersection );

									}

								}

							}

						} else {

							var start$3 = Math.max( 0, drawRange.start );
							var end$3 = Math.min( position.count, ( drawRange.start + drawRange.count ) );

							for ( var i$3 = start$3, il$3 = end$3; i$3 < il$3; i$3 += 3 ) {

								var a$3 = i$3;
								var b$3 = i$3 + 1;
								var c$3 = i$3 + 2;

								intersection = checkBufferGeometryIntersection( this, material, raycaster, _ray, position, morphPosition, morphTargetsRelative, uv, uv2, a$3, b$3, c$3 );

								if ( intersection ) {

									intersection.faceIndex = Math.floor( i$3 / 3 ); // triangle number in non-indexed buffer semantics
									intersects.push( intersection );

								}

							}

						}

					}

				} else if ( geometry.isGeometry ) {

					var isMultiMaterial = Array.isArray( material );

					var vertices = geometry.vertices;
					var faces = geometry.faces;
					var uvs;

					var faceVertexUvs = geometry.faceVertexUvs[ 0 ];
					if ( faceVertexUvs.length > 0 ) { uvs = faceVertexUvs; }

					for ( var f = 0, fl = faces.length; f < fl; f ++ ) {

						var face = faces[ f ];
						var faceMaterial = isMultiMaterial ? material[ face.materialIndex ] : material;

						if ( faceMaterial === undefined ) { continue; }

						var fvA = vertices[ face.a ];
						var fvB = vertices[ face.b ];
						var fvC = vertices[ face.c ];

						intersection = checkIntersection( this, faceMaterial, raycaster, _ray, fvA, fvB, fvC, _intersectionPoint );

						if ( intersection ) {

							if ( uvs && uvs[ f ] ) {

								var uvs_f = uvs[ f ];
								_uvA.copy( uvs_f[ 0 ] );
								_uvB.copy( uvs_f[ 1 ] );
								_uvC.copy( uvs_f[ 2 ] );

								intersection.uv = Triangle.getUV( _intersectionPoint, fvA, fvB, fvC, _uvA, _uvB, _uvC, new Vector2() );

							}

							intersection.face = face;
							intersection.faceIndex = f;
							intersects.push( intersection );

						}

					}

				}

			}

		} );

		function checkIntersection( object, material, raycaster, ray, pA, pB, pC, point ) {

			var intersect;

			if ( material.side === BackSide ) {

				intersect = ray.intersectTriangle( pC, pB, pA, true, point );

			} else {

				intersect = ray.intersectTriangle( pA, pB, pC, material.side !== DoubleSide, point );

			}

			if ( intersect === null ) { return null; }

			_intersectionPointWorld.copy( point );
			_intersectionPointWorld.applyMatrix4( object.matrixWorld );

			var distance = raycaster.ray.origin.distanceTo( _intersectionPointWorld );

			if ( distance < raycaster.near || distance > raycaster.far ) { return null; }

			return {
				distance: distance,
				point: _intersectionPointWorld.clone(),
				object: object
			};

		}

		function checkBufferGeometryIntersection( object, material, raycaster, ray, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c ) {

			_vA.fromBufferAttribute( position, a );
			_vB.fromBufferAttribute( position, b );
			_vC.fromBufferAttribute( position, c );

			var morphInfluences = object.morphTargetInfluences;

			if ( material.morphTargets && morphPosition && morphInfluences ) {

				_morphA.set( 0, 0, 0 );
				_morphB.set( 0, 0, 0 );
				_morphC.set( 0, 0, 0 );

				for ( var i = 0, il = morphPosition.length; i < il; i ++ ) {

					var influence = morphInfluences[ i ];
					var morphAttribute = morphPosition[ i ];

					if ( influence === 0 ) { continue; }

					_tempA.fromBufferAttribute( morphAttribute, a );
					_tempB.fromBufferAttribute( morphAttribute, b );
					_tempC.fromBufferAttribute( morphAttribute, c );

					if ( morphTargetsRelative ) {

						_morphA.addScaledVector( _tempA, influence );
						_morphB.addScaledVector( _tempB, influence );
						_morphC.addScaledVector( _tempC, influence );

					} else {

						_morphA.addScaledVector( _tempA.sub( _vA ), influence );
						_morphB.addScaledVector( _tempB.sub( _vB ), influence );
						_morphC.addScaledVector( _tempC.sub( _vC ), influence );

					}

				}

				_vA.add( _morphA );
				_vB.add( _morphB );
				_vC.add( _morphC );

			}

			if ( object.isSkinnedMesh ) {

				object.boneTransform( a, _vA );
				object.boneTransform( b, _vB );
				object.boneTransform( c, _vC );

			}

			var intersection = checkIntersection( object, material, raycaster, ray, _vA, _vB, _vC, _intersectionPoint );

			if ( intersection ) {

				if ( uv ) {

					_uvA.fromBufferAttribute( uv, a );
					_uvB.fromBufferAttribute( uv, b );
					_uvC.fromBufferAttribute( uv, c );

					intersection.uv = Triangle.getUV( _intersectionPoint, _vA, _vB, _vC, _uvA, _uvB, _uvC, new Vector2() );

				}

				if ( uv2 ) {

					_uvA.fromBufferAttribute( uv2, a );
					_uvB.fromBufferAttribute( uv2, b );
					_uvC.fromBufferAttribute( uv2, c );

					intersection.uv2 = Triangle.getUV( _intersectionPoint, _vA, _vB, _vC, _uvA, _uvB, _uvC, new Vector2() );

				}

				var face = new Face3( a, b, c );
				Triangle.getNormal( _vA, _vB, _vC, face.normal );

				intersection.face = face;

			}

			return intersection;

		}

		var _geometryId = 0; // Geometry uses even numbers as Id
		var _m1$3 = new Matrix4();
		var _obj$1 = new Object3D();
		var _offset$1 = new Vector3();

		function Geometry() {

			Object.defineProperty( this, 'id', { value: _geometryId += 2 } );

			this.uuid = MathUtils.generateUUID();

			this.name = '';
			this.type = 'Geometry';

			this.vertices = [];
			this.colors = [];
			this.faces = [];
			this.faceVertexUvs = [[]];

			this.morphTargets = [];
			this.morphNormals = [];

			this.skinWeights = [];
			this.skinIndices = [];

			this.lineDistances = [];

			this.boundingBox = null;
			this.boundingSphere = null;

			// update flags

			this.elementsNeedUpdate = false;
			this.verticesNeedUpdate = false;
			this.uvsNeedUpdate = false;
			this.normalsNeedUpdate = false;
			this.colorsNeedUpdate = false;
			this.lineDistancesNeedUpdate = false;
			this.groupsNeedUpdate = false;

		}

		Geometry.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {

			constructor: Geometry,

			isGeometry: true,

			applyMatrix4: function ( matrix ) {

				var normalMatrix = new Matrix3().getNormalMatrix( matrix );

				for ( var i = 0, il = this.vertices.length; i < il; i ++ ) {

					var vertex = this.vertices[ i ];
					vertex.applyMatrix4( matrix );

				}

				for ( var i$1 = 0, il$1 = this.faces.length; i$1 < il$1; i$1 ++ ) {

					var face = this.faces[ i$1 ];
					face.normal.applyMatrix3( normalMatrix ).normalize();

					for ( var j = 0, jl = face.vertexNormals.length; j < jl; j ++ ) {

						face.vertexNormals[ j ].applyMatrix3( normalMatrix ).normalize();

					}

				}

				if ( this.boundingBox !== null ) {

					this.computeBoundingBox();

				}

				if ( this.boundingSphere !== null ) {

					this.computeBoundingSphere();

				}

				this.verticesNeedUpdate = true;
				this.normalsNeedUpdate = true;

				return this;

			},

			rotateX: function ( angle ) {

				// rotate geometry around world x-axis

				_m1$3.makeRotationX( angle );

				this.applyMatrix4( _m1$3 );

				return this;

			},

			rotateY: function ( angle ) {

				// rotate geometry around world y-axis

				_m1$3.makeRotationY( angle );

				this.applyMatrix4( _m1$3 );

				return this;

			},

			rotateZ: function ( angle ) {

				// rotate geometry around world z-axis

				_m1$3.makeRotationZ( angle );

				this.applyMatrix4( _m1$3 );

				return this;

			},

			translate: function ( x, y, z ) {

				// translate geometry

				_m1$3.makeTranslation( x, y, z );

				this.applyMatrix4( _m1$3 );

				return this;

			},

			scale: function ( x, y, z ) {

				// scale geometry

				_m1$3.makeScale( x, y, z );

				this.applyMatrix4( _m1$3 );

				return this;

			},

			lookAt: function ( vector ) {

				_obj$1.lookAt( vector );

				_obj$1.updateMatrix();

				this.applyMatrix4( _obj$1.matrix );

				return this;

			},

			fromBufferGeometry: function ( geometry ) {

				var scope = this;

				var index = geometry.index !== null ? geometry.index : undefined;
				var attributes = geometry.attributes;

				if ( attributes.position === undefined ) {

					console.error( 'THREE.Geometry.fromBufferGeometry(): Position attribute required for conversion.' );
					return this;

				}

				var position = attributes.position;
				var normal = attributes.normal;
				var color = attributes.color;
				var uv = attributes.uv;
				var uv2 = attributes.uv2;

				if ( uv2 !== undefined ) { this.faceVertexUvs[ 1 ] = []; }

				for ( var i = 0; i < position.count; i ++ ) {

					scope.vertices.push( new Vector3().fromBufferAttribute( position, i ) );

					if ( color !== undefined ) {

						scope.colors.push( new Color().fromBufferAttribute( color, i ) );

					}

				}

				function addFace( a, b, c, materialIndex ) {

					var vertexColors = ( color === undefined ) ? [] : [
						scope.colors[ a ].clone(),
						scope.colors[ b ].clone(),
						scope.colors[ c ].clone()
					];

					var vertexNormals = ( normal === undefined ) ? [] : [
						new Vector3().fromBufferAttribute( normal, a ),
						new Vector3().fromBufferAttribute( normal, b ),
						new Vector3().fromBufferAttribute( normal, c )
					];

					var face = new Face3( a, b, c, vertexNormals, vertexColors, materialIndex );

					scope.faces.push( face );

					if ( uv !== undefined ) {

						scope.faceVertexUvs[ 0 ].push( [
							new Vector2().fromBufferAttribute( uv, a ),
							new Vector2().fromBufferAttribute( uv, b ),
							new Vector2().fromBufferAttribute( uv, c )
						] );

					}

					if ( uv2 !== undefined ) {

						scope.faceVertexUvs[ 1 ].push( [
							new Vector2().fromBufferAttribute( uv2, a ),
							new Vector2().fromBufferAttribute( uv2, b ),
							new Vector2().fromBufferAttribute( uv2, c )
						] );

					}

				}

				var groups = geometry.groups;

				if ( groups.length > 0 ) {

					for ( var i$1 = 0; i$1 < groups.length; i$1 ++ ) {

						var group = groups[ i$1 ];

						var start = group.start;
						var count = group.count;

						for ( var j = start, jl = start + count; j < jl; j += 3 ) {

							if ( index !== undefined ) {

								addFace( index.getX( j ), index.getX( j + 1 ), index.getX( j + 2 ), group.materialIndex );

							} else {

								addFace( j, j + 1, j + 2, group.materialIndex );

							}

						}

					}

				} else {

					if ( index !== undefined ) {

						for ( var i$2 = 0; i$2 < index.count; i$2 += 3 ) {

							addFace( index.getX( i$2 ), index.getX( i$2 + 1 ), index.getX( i$2 + 2 ) );

						}

					} else {

						for ( var i$3 = 0; i$3 < position.count; i$3 += 3 ) {

							addFace( i$3, i$3 + 1, i$3 + 2 );

						}

					}

				}

				this.computeFaceNormals();

				if ( geometry.boundingBox !== null ) {

					this.boundingBox = geometry.boundingBox.clone();

				}

				if ( geometry.boundingSphere !== null ) {

					this.boundingSphere = geometry.boundingSphere.clone();

				}

				return this;

			},

			center: function () {

				this.computeBoundingBox();

				this.boundingBox.getCenter( _offset$1 ).negate();

				this.translate( _offset$1.x, _offset$1.y, _offset$1.z );

				return this;

			},

			normalize: function () {

				this.computeBoundingSphere();

				var center = this.boundingSphere.center;
				var radius = this.boundingSphere.radius;

				var s = radius === 0 ? 1 : 1.0 / radius;

				var matrix = new Matrix4();
				matrix.set(
					s, 0, 0, - s * center.x,
					0, s, 0, - s * center.y,
					0, 0, s, - s * center.z,
					0, 0, 0, 1
				);

				this.applyMatrix4( matrix );

				return this;

			},

			computeFaceNormals: function () {

				var cb = new Vector3(), ab = new Vector3();

				for ( var f = 0, fl = this.faces.length; f < fl; f ++ ) {

					var face = this.faces[ f ];

					var vA = this.vertices[ face.a ];
					var vB = this.vertices[ face.b ];
					var vC = this.vertices[ face.c ];

					cb.subVectors( vC, vB );
					ab.subVectors( vA, vB );
					cb.cross( ab );

					cb.normalize();

					face.normal.copy( cb );

				}

			},

			computeVertexNormals: function ( areaWeighted ) {

				if ( areaWeighted === undefined ) { areaWeighted = true; }

				var vertices = new Array( this.vertices.length );

				for ( var v = 0, vl = this.vertices.length; v < vl; v ++ ) {

					vertices[ v ] = new Vector3();

				}

				if ( areaWeighted ) {

					// vertex normals weighted by triangle areas
					// http://www.iquilezles.org/www/articles/normals/normals.htm

					var cb = new Vector3(), ab = new Vector3();

					for ( var f = 0, fl = this.faces.length; f < fl; f ++ ) {

						var face = this.faces[ f ];

						var vA = this.vertices[ face.a ];
						var vB = this.vertices[ face.b ];
						var vC = this.vertices[ face.c ];

						cb.subVectors( vC, vB );
						ab.subVectors( vA, vB );
						cb.cross( ab );

						vertices[ face.a ].add( cb );
						vertices[ face.b ].add( cb );
						vertices[ face.c ].add( cb );

					}

				} else {

					this.computeFaceNormals();

					for ( var f$1 = 0, fl$1 = this.faces.length; f$1 < fl$1; f$1 ++ ) {

						var face$1 = this.faces[ f$1 ];

						vertices[ face$1.a ].add( face$1.normal );
						vertices[ face$1.b ].add( face$1.normal );
						vertices[ face$1.c ].add( face$1.normal );

					}

				}

				for ( var v$1 = 0, vl$1 = this.vertices.length; v$1 < vl$1; v$1 ++ ) {

					vertices[ v$1 ].normalize();

				}

				for ( var f$2 = 0, fl$2 = this.faces.length; f$2 < fl$2; f$2 ++ ) {

					var face$2 = this.faces[ f$2 ];

					var vertexNormals = face$2.vertexNormals;

					if ( vertexNormals.length === 3 ) {

						vertexNormals[ 0 ].copy( vertices[ face$2.a ] );
						vertexNormals[ 1 ].copy( vertices[ face$2.b ] );
						vertexNormals[ 2 ].copy( vertices[ face$2.c ] );

					} else {

						vertexNormals[ 0 ] = vertices[ face$2.a ].clone();
						vertexNormals[ 1 ] = vertices[ face$2.b ].clone();
						vertexNormals[ 2 ] = vertices[ face$2.c ].clone();

					}

				}

				if ( this.faces.length > 0 ) {

					this.normalsNeedUpdate = true;

				}

			},

			computeFlatVertexNormals: function () {

				this.computeFaceNormals();

				for ( var f = 0, fl = this.faces.length; f < fl; f ++ ) {

					var face = this.faces[ f ];

					var vertexNormals = face.vertexNormals;

					if ( vertexNormals.length === 3 ) {

						vertexNormals[ 0 ].copy( face.normal );
						vertexNormals[ 1 ].copy( face.normal );
						vertexNormals[ 2 ].copy( face.normal );

					} else {

						vertexNormals[ 0 ] = face.normal.clone();
						vertexNormals[ 1 ] = face.normal.clone();
						vertexNormals[ 2 ] = face.normal.clone();

					}

				}

				if ( this.faces.length > 0 ) {

					this.normalsNeedUpdate = true;

				}

			},

			computeMorphNormals: function () {

				// save original normals
				// - create temp variables on first access
				//   otherwise just copy (for faster repeated calls)

				for ( var f = 0, fl = this.faces.length; f < fl; f ++ ) {

					var face = this.faces[ f ];

					if ( ! face.__originalFaceNormal ) {

						face.__originalFaceNormal = face.normal.clone();

					} else {

						face.__originalFaceNormal.copy( face.normal );

					}

					if ( ! face.__originalVertexNormals ) { face.__originalVertexNormals = []; }

					for ( var i = 0, il = face.vertexNormals.length; i < il; i ++ ) {

						if ( ! face.__originalVertexNormals[ i ] ) {

							face.__originalVertexNormals[ i ] = face.vertexNormals[ i ].clone();

						} else {

							face.__originalVertexNormals[ i ].copy( face.vertexNormals[ i ] );

						}

					}

				}

				// use temp geometry to compute face and vertex normals for each morph

				var tmpGeo = new Geometry();
				tmpGeo.faces = this.faces;

				for ( var i$1 = 0, il$1 = this.morphTargets.length; i$1 < il$1; i$1 ++ ) {

					// create on first access

					if ( ! this.morphNormals[ i$1 ] ) {

						this.morphNormals[ i$1 ] = {};
						this.morphNormals[ i$1 ].faceNormals = [];
						this.morphNormals[ i$1 ].vertexNormals = [];

						var dstNormalsFace = this.morphNormals[ i$1 ].faceNormals;
						var dstNormalsVertex = this.morphNormals[ i$1 ].vertexNormals;

						for ( var f$1 = 0, fl$1 = this.faces.length; f$1 < fl$1; f$1 ++ ) {

							var faceNormal = new Vector3();
							var vertexNormals = { a: new Vector3(), b: new Vector3(), c: new Vector3() };

							dstNormalsFace.push( faceNormal );
							dstNormalsVertex.push( vertexNormals );

						}

					}

					var morphNormals = this.morphNormals[ i$1 ];

					// set vertices to morph target

					tmpGeo.vertices = this.morphTargets[ i$1 ].vertices;

					// compute morph normals

					tmpGeo.computeFaceNormals();
					tmpGeo.computeVertexNormals();

					// store morph normals

					for ( var f$2 = 0, fl$2 = this.faces.length; f$2 < fl$2; f$2 ++ ) {

						var face$1 = this.faces[ f$2 ];

						var faceNormal$1 = morphNormals.faceNormals[ f$2 ];
						var vertexNormals$1 = morphNormals.vertexNormals[ f$2 ];

						faceNormal$1.copy( face$1.normal );

						vertexNormals$1.a.copy( face$1.vertexNormals[ 0 ] );
						vertexNormals$1.b.copy( face$1.vertexNormals[ 1 ] );
						vertexNormals$1.c.copy( face$1.vertexNormals[ 2 ] );

					}

				}

				// restore original normals

				for ( var f$3 = 0, fl$3 = this.faces.length; f$3 < fl$3; f$3 ++ ) {

					var face$2 = this.faces[ f$3 ];

					face$2.normal = face$2.__originalFaceNormal;
					face$2.vertexNormals = face$2.__originalVertexNormals;

				}

			},

			computeBoundingBox: function () {

				if ( this.boundingBox === null ) {

					this.boundingBox = new Box3();

				}

				this.boundingBox.setFromPoints( this.vertices );

			},

			computeBoundingSphere: function () {

				if ( this.boundingSphere === null ) {

					this.boundingSphere = new Sphere();

				}

				this.boundingSphere.setFromPoints( this.vertices );

			},

			merge: function ( geometry, matrix, materialIndexOffset ) {

				if ( ! ( geometry && geometry.isGeometry ) ) {

					console.error( 'THREE.Geometry.merge(): geometry not an instance of THREE.Geometry.', geometry );
					return;

				}

				var normalMatrix;
				var vertexOffset = this.vertices.length,
					vertices1 = this.vertices,
					vertices2 = geometry.vertices,
					faces1 = this.faces,
					faces2 = geometry.faces,
					colors1 = this.colors,
					colors2 = geometry.colors;

				if ( materialIndexOffset === undefined ) { materialIndexOffset = 0; }

				if ( matrix !== undefined ) {

					normalMatrix = new Matrix3().getNormalMatrix( matrix );

				}

				// vertices

				for ( var i = 0, il = vertices2.length; i < il; i ++ ) {

					var vertex = vertices2[ i ];

					var vertexCopy = vertex.clone();

					if ( matrix !== undefined ) { vertexCopy.applyMatrix4( matrix ); }

					vertices1.push( vertexCopy );

				}

				// colors

				for ( var i$1 = 0, il$1 = colors2.length; i$1 < il$1; i$1 ++ ) {

					colors1.push( colors2[ i$1 ].clone() );

				}

				// faces

				for ( var i$2 = 0, il$2 = faces2.length; i$2 < il$2; i$2 ++ ) {

					var face = faces2[ i$2 ];
					var normal = (void 0), color = (void 0);
					var faceVertexNormals = face.vertexNormals,
						faceVertexColors = face.vertexColors;

					var faceCopy = new Face3( face.a + vertexOffset, face.b + vertexOffset, face.c + vertexOffset );
					faceCopy.normal.copy( face.normal );

					if ( normalMatrix !== undefined ) {

						faceCopy.normal.applyMatrix3( normalMatrix ).normalize();

					}

					for ( var j = 0, jl = faceVertexNormals.length; j < jl; j ++ ) {

						normal = faceVertexNormals[ j ].clone();

						if ( normalMatrix !== undefined ) {

							normal.applyMatrix3( normalMatrix ).normalize();

						}

						faceCopy.vertexNormals.push( normal );

					}

					faceCopy.color.copy( face.color );

					for ( var j$1 = 0, jl$1 = faceVertexColors.length; j$1 < jl$1; j$1 ++ ) {

						color = faceVertexColors[ j$1 ];
						faceCopy.vertexColors.push( color.clone() );

					}

					faceCopy.materialIndex = face.materialIndex + materialIndexOffset;

					faces1.push( faceCopy );

				}

				// uvs

				for ( var i$3 = 0, il$3 = geometry.faceVertexUvs.length; i$3 < il$3; i$3 ++ ) {

					var faceVertexUvs2 = geometry.faceVertexUvs[ i$3 ];

					if ( this.faceVertexUvs[ i$3 ] === undefined ) { this.faceVertexUvs[ i$3 ] = []; }

					for ( var j$2 = 0, jl$2 = faceVertexUvs2.length; j$2 < jl$2; j$2 ++ ) {

						var uvs2 = faceVertexUvs2[ j$2 ], uvsCopy = [];

						for ( var k = 0, kl = uvs2.length; k < kl; k ++ ) {

							uvsCopy.push( uvs2[ k ].clone() );

						}

						this.faceVertexUvs[ i$3 ].push( uvsCopy );

					}

				}

			},

			mergeMesh: function ( mesh ) {

				if ( ! ( mesh && mesh.isMesh ) ) {

					console.error( 'THREE.Geometry.mergeMesh(): mesh not an instance of THREE.Mesh.', mesh );
					return;

				}

				if ( mesh.matrixAutoUpdate ) { mesh.updateMatrix(); }

				this.merge( mesh.geometry, mesh.matrix );

			},

			/*
			 * Checks for duplicate vertices with hashmap.
			 * Duplicated vertices are removed
			 * and faces' vertices are updated.
			 */

			mergeVertices: function () {

				var verticesMap = {}; // Hashmap for looking up vertices by position coordinates (and making sure they are unique)
				var unique = [], changes = [];

				var precisionPoints = 4; // number of decimal points, e.g. 4 for epsilon of 0.0001
				var precision = Math.pow( 10, precisionPoints );

				for ( var i = 0, il = this.vertices.length; i < il; i ++ ) {

					var v = this.vertices[ i ];
					var key = Math.round( v.x * precision ) + '_' + Math.round( v.y * precision ) + '_' + Math.round( v.z * precision );

					if ( verticesMap[ key ] === undefined ) {

						verticesMap[ key ] = i;
						unique.push( this.vertices[ i ] );
						changes[ i ] = unique.length - 1;

					} else {

						//console.log('Duplicate vertex found. ', i, ' could be using ', verticesMap[key]);
						changes[ i ] = changes[ verticesMap[ key ] ];

					}

				}


				// if faces are completely degenerate after merging vertices, we
				// have to remove them from the geometry.
				var faceIndicesToRemove = [];

				for ( var i$1 = 0, il$1 = this.faces.length; i$1 < il$1; i$1 ++ ) {

					var face = this.faces[ i$1 ];

					face.a = changes[ face.a ];
					face.b = changes[ face.b ];
					face.c = changes[ face.c ];

					var indices = [ face.a, face.b, face.c ];

					// if any duplicate vertices are found in a Face3
					// we have to remove the face as nothing can be saved
					for ( var n = 0; n < 3; n ++ ) {

						if ( indices[ n ] === indices[ ( n + 1 ) % 3 ] ) {

							faceIndicesToRemove.push( i$1 );
							break;

						}

					}

				}

				for ( var i$2 = faceIndicesToRemove.length - 1; i$2 >= 0; i$2 -- ) {

					var idx = faceIndicesToRemove[ i$2 ];

					this.faces.splice( idx, 1 );

					for ( var j = 0, jl = this.faceVertexUvs.length; j < jl; j ++ ) {

						this.faceVertexUvs[ j ].splice( idx, 1 );

					}

				}

				// Use unique set of vertices

				var diff = this.vertices.length - unique.length;
				this.vertices = unique;
				return diff;

			},

			setFromPoints: function ( points ) {

				this.vertices = [];

				for ( var i = 0, l = points.length; i < l; i ++ ) {

					var point = points[ i ];
					this.vertices.push( new Vector3( point.x, point.y, point.z || 0 ) );

				}

				return this;

			},

			sortFacesByMaterialIndex: function () {

				var faces = this.faces;
				var length = faces.length;

				// tag faces

				for ( var i = 0; i < length; i ++ ) {

					faces[ i ]._id = i;

				}

				// sort faces

				function materialIndexSort( a, b ) {

					return a.materialIndex - b.materialIndex;

				}

				faces.sort( materialIndexSort );

				// sort uvs

				var uvs1 = this.faceVertexUvs[ 0 ];
				var uvs2 = this.faceVertexUvs[ 1 ];

				var newUvs1, newUvs2;

				if ( uvs1 && uvs1.length === length ) { newUvs1 = []; }
				if ( uvs2 && uvs2.length === length ) { newUvs2 = []; }

				for ( var i$1 = 0; i$1 < length; i$1 ++ ) {

					var id = faces[ i$1 ]._id;

					if ( newUvs1 ) { newUvs1.push( uvs1[ id ] ); }
					if ( newUvs2 ) { newUvs2.push( uvs2[ id ] ); }

				}

				if ( newUvs1 ) { this.faceVertexUvs[ 0 ] = newUvs1; }
				if ( newUvs2 ) { this.faceVertexUvs[ 1 ] = newUvs2; }

			},

			toJSON: function () {

				var data = {
					metadata: {
						version: 4.5,
						type: 'Geometry',
						generator: 'Geometry.toJSON'
					}
				};

				// standard Geometry serialization

				data.uuid = this.uuid;
				data.type = this.type;
				if ( this.name !== '' ) { data.name = this.name; }

				if ( this.parameters !== undefined ) {

					var parameters = this.parameters;

					for ( var key in parameters ) {

						if ( parameters[ key ] !== undefined ) { data[ key ] = parameters[ key ]; }

					}

					return data;

				}

				var vertices = [];

				for ( var i = 0; i < this.vertices.length; i ++ ) {

					var vertex = this.vertices[ i ];
					vertices.push( vertex.x, vertex.y, vertex.z );

				}

				var faces = [];
				var normals = [];
				var normalsHash = {};
				var colors = [];
				var colorsHash = {};
				var uvs = [];
				var uvsHash = {};

				for ( var i$1 = 0; i$1 < this.faces.length; i$1 ++ ) {

					var face = this.faces[ i$1 ];

					var hasMaterial = true;
					var hasFaceUv = false; // deprecated
					var hasFaceVertexUv = this.faceVertexUvs[ 0 ][ i$1 ] !== undefined;
					var hasFaceNormal = face.normal.length() > 0;
					var hasFaceVertexNormal = face.vertexNormals.length > 0;
					var hasFaceColor = face.color.r !== 1 || face.color.g !== 1 || face.color.b !== 1;
					var hasFaceVertexColor = face.vertexColors.length > 0;

					var faceType = 0;

					faceType = setBit( faceType, 0, 0 ); // isQuad
					faceType = setBit( faceType, 1, hasMaterial );
					faceType = setBit( faceType, 2, hasFaceUv );
					faceType = setBit( faceType, 3, hasFaceVertexUv );
					faceType = setBit( faceType, 4, hasFaceNormal );
					faceType = setBit( faceType, 5, hasFaceVertexNormal );
					faceType = setBit( faceType, 6, hasFaceColor );
					faceType = setBit( faceType, 7, hasFaceVertexColor );

					faces.push( faceType );
					faces.push( face.a, face.b, face.c );
					faces.push( face.materialIndex );

					if ( hasFaceVertexUv ) {

						var faceVertexUvs = this.faceVertexUvs[ 0 ][ i$1 ];

						faces.push(
							getUvIndex( faceVertexUvs[ 0 ] ),
							getUvIndex( faceVertexUvs[ 1 ] ),
							getUvIndex( faceVertexUvs[ 2 ] )
						);

					}

					if ( hasFaceNormal ) {

						faces.push( getNormalIndex( face.normal ) );

					}

					if ( hasFaceVertexNormal ) {

						var vertexNormals = face.vertexNormals;

						faces.push(
							getNormalIndex( vertexNormals[ 0 ] ),
							getNormalIndex( vertexNormals[ 1 ] ),
							getNormalIndex( vertexNormals[ 2 ] )
						);

					}

					if ( hasFaceColor ) {

						faces.push( getColorIndex( face.color ) );

					}

					if ( hasFaceVertexColor ) {

						var vertexColors = face.vertexColors;

						faces.push(
							getColorIndex( vertexColors[ 0 ] ),
							getColorIndex( vertexColors[ 1 ] ),
							getColorIndex( vertexColors[ 2 ] )
						);

					}

				}

				function setBit( value, position, enabled ) {

					return enabled ? value | ( 1 << position ) : value & ( ~ ( 1 << position ) );

				}

				function getNormalIndex( normal ) {

					var hash = normal.x.toString() + normal.y.toString() + normal.z.toString();

					if ( normalsHash[ hash ] !== undefined ) {

						return normalsHash[ hash ];

					}

					normalsHash[ hash ] = normals.length / 3;
					normals.push( normal.x, normal.y, normal.z );

					return normalsHash[ hash ];

				}

				function getColorIndex( color ) {

					var hash = color.r.toString() + color.g.toString() + color.b.toString();

					if ( colorsHash[ hash ] !== undefined ) {

						return colorsHash[ hash ];

					}

					colorsHash[ hash ] = colors.length;
					colors.push( color.getHex() );

					return colorsHash[ hash ];

				}

				function getUvIndex( uv ) {

					var hash = uv.x.toString() + uv.y.toString();

					if ( uvsHash[ hash ] !== undefined ) {

						return uvsHash[ hash ];

					}

					uvsHash[ hash ] = uvs.length / 2;
					uvs.push( uv.x, uv.y );

					return uvsHash[ hash ];

				}

				data.data = {};

				data.data.vertices = vertices;
				data.data.normals = normals;
				if ( colors.length > 0 ) { data.data.colors = colors; }
				if ( uvs.length > 0 ) { data.data.uvs = [ uvs ]; } // temporal backward compatibility
				data.data.faces = faces;

				return data;

			},

			clone: function () {

				/*
				 // Handle primitives

				 const parameters = this.parameters;

				 if ( parameters !== undefined ) {

				 const values = [];

				 for ( const key in parameters ) {

				 values.push( parameters[ key ] );

				 }

				 const geometry = Object.create( this.constructor.prototype );
				 this.constructor.apply( geometry, values );
				 return geometry;

				 }

				 return new this.constructor().copy( this );
				 */

				return new Geometry().copy( this );

			},

			copy: function ( source ) {

				// reset

				this.vertices = [];
				this.colors = [];
				this.faces = [];
				this.faceVertexUvs = [[]];
				this.morphTargets = [];
				this.morphNormals = [];
				this.skinWeights = [];
				this.skinIndices = [];
				this.lineDistances = [];
				this.boundingBox = null;
				this.boundingSphere = null;

				// name

				this.name = source.name;

				// vertices

				var vertices = source.vertices;

				for ( var i = 0, il = vertices.length; i < il; i ++ ) {

					this.vertices.push( vertices[ i ].clone() );

				}

				// colors

				var colors = source.colors;

				for ( var i$1 = 0, il$1 = colors.length; i$1 < il$1; i$1 ++ ) {

					this.colors.push( colors[ i$1 ].clone() );

				}

				// faces

				var faces = source.faces;

				for ( var i$2 = 0, il$2 = faces.length; i$2 < il$2; i$2 ++ ) {

					this.faces.push( faces[ i$2 ].clone() );

				}

				// face vertex uvs

				for ( var i$3 = 0, il$3 = source.faceVertexUvs.length; i$3 < il$3; i$3 ++ ) {

					var faceVertexUvs = source.faceVertexUvs[ i$3 ];

					if ( this.faceVertexUvs[ i$3 ] === undefined ) {

						this.faceVertexUvs[ i$3 ] = [];

					}

					for ( var j = 0, jl = faceVertexUvs.length; j < jl; j ++ ) {

						var uvs = faceVertexUvs[ j ], uvsCopy = [];

						for ( var k = 0, kl = uvs.length; k < kl; k ++ ) {

							var uv = uvs[ k ];

							uvsCopy.push( uv.clone() );

						}

						this.faceVertexUvs[ i$3 ].push( uvsCopy );

					}

				}

				// morph targets

				var morphTargets = source.morphTargets;

				for ( var i$4 = 0, il$4 = morphTargets.length; i$4 < il$4; i$4 ++ ) {

					var morphTarget = {};
					morphTarget.name = morphTargets[ i$4 ].name;

					// vertices

					if ( morphTargets[ i$4 ].vertices !== undefined ) {

						morphTarget.vertices = [];

						for ( var j$1 = 0, jl$1 = morphTargets[ i$4 ].vertices.length; j$1 < jl$1; j$1 ++ ) {

							morphTarget.vertices.push( morphTargets[ i$4 ].vertices[ j$1 ].clone() );

						}

					}

					// normals

					if ( morphTargets[ i$4 ].normals !== undefined ) {

						morphTarget.normals = [];

						for ( var j$2 = 0, jl$2 = morphTargets[ i$4 ].normals.length; j$2 < jl$2; j$2 ++ ) {

							morphTarget.normals.push( morphTargets[ i$4 ].normals[ j$2 ].clone() );

						}

					}

					this.morphTargets.push( morphTarget );

				}

				// morph normals

				var morphNormals = source.morphNormals;

				for ( var i$5 = 0, il$5 = morphNormals.length; i$5 < il$5; i$5 ++ ) {

					var morphNormal = {};

					// vertex normals

					if ( morphNormals[ i$5 ].vertexNormals !== undefined ) {

						morphNormal.vertexNormals = [];

						for ( var j$3 = 0, jl$3 = morphNormals[ i$5 ].vertexNormals.length; j$3 < jl$3; j$3 ++ ) {

							var srcVertexNormal = morphNormals[ i$5 ].vertexNormals[ j$3 ];
							var destVertexNormal = {};

							destVertexNormal.a = srcVertexNormal.a.clone();
							destVertexNormal.b = srcVertexNormal.b.clone();
							destVertexNormal.c = srcVertexNormal.c.clone();

							morphNormal.vertexNormals.push( destVertexNormal );

						}

					}

					// face normals

					if ( morphNormals[ i$5 ].faceNormals !== undefined ) {

						morphNormal.faceNormals = [];

						for ( var j$4 = 0, jl$4 = morphNormals[ i$5 ].faceNormals.length; j$4 < jl$4; j$4 ++ ) {

							morphNormal.faceNormals.push( morphNormals[ i$5 ].faceNormals[ j$4 ].clone() );

						}

					}

					this.morphNormals.push( morphNormal );

				}

				// skin weights

				var skinWeights = source.skinWeights;

				for ( var i$6 = 0, il$6 = skinWeights.length; i$6 < il$6; i$6 ++ ) {

					this.skinWeights.push( skinWeights[ i$6 ].clone() );

				}

				// skin indices

				var skinIndices = source.skinIndices;

				for ( var i$7 = 0, il$7 = skinIndices.length; i$7 < il$7; i$7 ++ ) {

					this.skinIndices.push( skinIndices[ i$7 ].clone() );

				}

				// line distances

				var lineDistances = source.lineDistances;

				for ( var i$8 = 0, il$8 = lineDistances.length; i$8 < il$8; i$8 ++ ) {

					this.lineDistances.push( lineDistances[ i$8 ] );

				}

				// bounding box

				var boundingBox = source.boundingBox;

				if ( boundingBox !== null ) {

					this.boundingBox = boundingBox.clone();

				}

				// bounding sphere

				var boundingSphere = source.boundingSphere;

				if ( boundingSphere !== null ) {

					this.boundingSphere = boundingSphere.clone();

				}

				// update flags

				this.elementsNeedUpdate = source.elementsNeedUpdate;
				this.verticesNeedUpdate = source.verticesNeedUpdate;
				this.uvsNeedUpdate = source.uvsNeedUpdate;
				this.normalsNeedUpdate = source.normalsNeedUpdate;
				this.colorsNeedUpdate = source.colorsNeedUpdate;
				this.lineDistancesNeedUpdate = source.lineDistancesNeedUpdate;
				this.groupsNeedUpdate = source.groupsNeedUpdate;

				return this;

			},

			dispose: function () {

				this.dispatchEvent( { type: 'dispose' } );

			}

		} );

		// BoxGeometry

			function BoxGeometry( width, height, depth, widthSegments, heightSegments, depthSegments ) {

				Geometry.call(this);

				this.type = 'BoxGeometry';

				this.parameters = {
					width: width,
					height: height,
					depth: depth,
					widthSegments: widthSegments,
					heightSegments: heightSegments,
					depthSegments: depthSegments
				};

				this.fromBufferGeometry( new BoxBufferGeometry( width, height, depth, widthSegments, heightSegments, depthSegments ) );
				this.mergeVertices();

			}

			BoxGeometry.prototype = Object.create( Geometry.prototype );
			BoxGeometry.prototype.constructor = BoxGeometry;

		// BoxBufferGeometry

			function BoxBufferGeometry( width, height, depth, widthSegments, heightSegments, depthSegments ) {
				if ( width === void 0 ) width = 1;
				if ( height === void 0 ) height = 1;
				if ( depth === void 0 ) depth = 1;
				if ( widthSegments === void 0 ) widthSegments = 1;
				if ( heightSegments === void 0 ) heightSegments = 1;
				if ( depthSegments === void 0 ) depthSegments = 1;


				BufferGeometry.call(this);

				this.type = 'BoxBufferGeometry';

				this.parameters = {
					width: width,
					height: height,
					depth: depth,
					widthSegments: widthSegments,
					heightSegments: heightSegments,
					depthSegments: depthSegments
				};

				var scope = this;

				// segments

				widthSegments = Math.floor( widthSegments );
				heightSegments = Math.floor( heightSegments );
				depthSegments = Math.floor( depthSegments );

				// buffers

				var indices = [];
				var vertices = [];
				var normals = [];
				var uvs = [];

				// helper variables

				var numberOfVertices = 0;
				var groupStart = 0;

				// build each side of the box geometry

				buildPlane( 'z', 'y', 'x', - 1, - 1, depth, height, width, depthSegments, heightSegments, 0 ); // px
				buildPlane( 'z', 'y', 'x', 1, - 1, depth, height, - width, depthSegments, heightSegments, 1 ); // nx
				buildPlane( 'x', 'z', 'y', 1, 1, width, depth, height, widthSegments, depthSegments, 2 ); // py
				buildPlane( 'x', 'z', 'y', 1, - 1, width, depth, - height, widthSegments, depthSegments, 3 ); // ny
				buildPlane( 'x', 'y', 'z', 1, - 1, width, height, depth, widthSegments, heightSegments, 4 ); // pz
				buildPlane( 'x', 'y', 'z', - 1, - 1, width, height, - depth, widthSegments, heightSegments, 5 ); // nz

				// build geometry

				this.setIndex( indices );
				this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
				this.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
				this.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

				function buildPlane( u, v, w, udir, vdir, width, height, depth, gridX, gridY, materialIndex ) {

					var segmentWidth = width / gridX;
					var segmentHeight = height / gridY;

					var widthHalf = width / 2;
					var heightHalf = height / 2;
					var depthHalf = depth / 2;

					var gridX1 = gridX + 1;
					var gridY1 = gridY + 1;

					var vertexCounter = 0;
					var groupCount = 0;

					var vector = new Vector3();

					// generate vertices, normals and uvs

					for ( var iy = 0; iy < gridY1; iy ++ ) {

						var y = iy * segmentHeight - heightHalf;

						for ( var ix = 0; ix < gridX1; ix ++ ) {

							var x = ix * segmentWidth - widthHalf;

							// set values to correct vector component

							vector[ u ] = x * udir;
							vector[ v ] = y * vdir;
							vector[ w ] = depthHalf;

							// now apply vector to vertex buffer

							vertices.push( vector.x, vector.y, vector.z );

							// set values to correct vector component

							vector[ u ] = 0;
							vector[ v ] = 0;
							vector[ w ] = depth > 0 ? 1 : - 1;

							// now apply vector to normal buffer

							normals.push( vector.x, vector.y, vector.z );

							// uvs

							uvs.push( ix / gridX );
							uvs.push( 1 - ( iy / gridY ) );

							// counters

							vertexCounter += 1;

						}

					}

					// indices

					// 1. you need three indices to draw a single face
					// 2. a single segment consists of two faces
					// 3. so we need to generate six (2*3) indices per segment

					for ( var iy$1 = 0; iy$1 < gridY; iy$1 ++ ) {

						for ( var ix$1 = 0; ix$1 < gridX; ix$1 ++ ) {

							var a = numberOfVertices + ix$1 + gridX1 * iy$1;
							var b = numberOfVertices + ix$1 + gridX1 * ( iy$1 + 1 );
							var c = numberOfVertices + ( ix$1 + 1 ) + gridX1 * ( iy$1 + 1 );
							var d = numberOfVertices + ( ix$1 + 1 ) + gridX1 * iy$1;

							// faces

							indices.push( a, b, d );
							indices.push( b, c, d );

							// increase counter

							groupCount += 6;

						}

					}

					// add a group to the geometry. this will ensure multi material support

					scope.addGroup( groupStart, groupCount, materialIndex );

					// calculate new start value for groups

					groupStart += groupCount;

					// update total number of vertices

					numberOfVertices += vertexCounter;

				}

			}

			BoxBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
			BoxBufferGeometry.prototype.constructor = BoxBufferGeometry;

		/**
		 * Uniform Utilities
		 */

		function cloneUniforms( src ) {

			var dst = {};

			for ( var u in src ) {

				dst[ u ] = {};

				for ( var p in src[ u ] ) {

					var property = src[ u ][ p ];

					if ( property && ( property.isColor ||
						property.isMatrix3 || property.isMatrix4 ||
						property.isVector2 || property.isVector3 || property.isVector4 ||
						property.isTexture ) ) {

						dst[ u ][ p ] = property.clone();

					} else if ( Array.isArray( property ) ) {

						dst[ u ][ p ] = property.slice();

					} else {

						dst[ u ][ p ] = property;

					}

				}

			}

			return dst;

		}

		function mergeUniforms( uniforms ) {

			var merged = {};

			for ( var u = 0; u < uniforms.length; u ++ ) {

				var tmp = cloneUniforms( uniforms[ u ] );

				for ( var p in tmp ) {

					merged[ p ] = tmp[ p ];

				}

			}

			return merged;

		}

		// Legacy

		var UniformsUtils = { clone: cloneUniforms, merge: mergeUniforms };

		var default_vertex = "void main() {\n\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n}";

		var default_fragment = "void main() {\n\tgl_FragColor = vec4( 1.0, 0.0, 0.0, 1.0 );\n}";

		/**
		 * parameters = {
		 *  defines: { "label" : "value" },
		 *  uniforms: { "parameter1": { value: 1.0 }, "parameter2": { value2: 2 } },
		 *
		 *  fragmentShader: <string>,
		 *  vertexShader: <string>,
		 *
		 *  wireframe: <boolean>,
		 *  wireframeLinewidth: <float>,
		 *
		 *  lights: <bool>,
		 *
		 *  skinning: <bool>,
		 *  morphTargets: <bool>,
		 *  morphNormals: <bool>
		 * }
		 */

		function ShaderMaterial( parameters ) {

			Material.call( this );

			this.type = 'ShaderMaterial';

			this.defines = {};
			this.uniforms = {};

			this.vertexShader = default_vertex;
			this.fragmentShader = default_fragment;

			this.linewidth = 1;

			this.wireframe = false;
			this.wireframeLinewidth = 1;

			this.fog = false; // set to use scene fog
			this.lights = false; // set to use scene lights
			this.clipping = false; // set to use user-defined clipping planes

			this.skinning = false; // set to use skinning attribute streams
			this.morphTargets = false; // set to use morph targets
			this.morphNormals = false; // set to use morph normals

			this.extensions = {
				derivatives: false, // set to use derivatives
				fragDepth: false, // set to use fragment depth values
				drawBuffers: false, // set to use draw buffers
				shaderTextureLOD: false // set to use shader texture LOD
			};

			// When rendered geometry doesn't include these attributes but the material does,
			// use these default values in WebGL. This avoids errors when buffer data is missing.
			this.defaultAttributeValues = {
				'color': [ 1, 1, 1 ],
				'uv': [ 0, 0 ],
				'uv2': [ 0, 0 ]
			};

			this.index0AttributeName = undefined;
			this.uniformsNeedUpdate = false;

			this.glslVersion = null;

			if ( parameters !== undefined ) {

				if ( parameters.attributes !== undefined ) {

					console.error( 'THREE.ShaderMaterial: attributes should now be defined in THREE.BufferGeometry instead.' );

				}

				this.setValues( parameters );

			}

		}

		ShaderMaterial.prototype = Object.create( Material.prototype );
		ShaderMaterial.prototype.constructor = ShaderMaterial;

		ShaderMaterial.prototype.isShaderMaterial = true;

		ShaderMaterial.prototype.copy = function ( source ) {

			Material.prototype.copy.call( this, source );

			this.fragmentShader = source.fragmentShader;
			this.vertexShader = source.vertexShader;

			this.uniforms = cloneUniforms( source.uniforms );

			this.defines = Object.assign( {}, source.defines );

			this.wireframe = source.wireframe;
			this.wireframeLinewidth = source.wireframeLinewidth;

			this.lights = source.lights;
			this.clipping = source.clipping;

			this.skinning = source.skinning;

			this.morphTargets = source.morphTargets;
			this.morphNormals = source.morphNormals;

			this.extensions = Object.assign( {}, source.extensions );

			this.glslVersion = source.glslVersion;

			return this;

		};

		ShaderMaterial.prototype.toJSON = function ( meta ) {

			var data = Material.prototype.toJSON.call( this, meta );

			data.glslVersion = this.glslVersion;
			data.uniforms = {};

			for ( var name in this.uniforms ) {

				var uniform = this.uniforms[ name ];
				var value = uniform.value;

				if ( value && value.isTexture ) {

					data.uniforms[ name ] = {
						type: 't',
						value: value.toJSON( meta ).uuid
					};

				} else if ( value && value.isColor ) {

					data.uniforms[ name ] = {
						type: 'c',
						value: value.getHex()
					};

				} else if ( value && value.isVector2 ) {

					data.uniforms[ name ] = {
						type: 'v2',
						value: value.toArray()
					};

				} else if ( value && value.isVector3 ) {

					data.uniforms[ name ] = {
						type: 'v3',
						value: value.toArray()
					};

				} else if ( value && value.isVector4 ) {

					data.uniforms[ name ] = {
						type: 'v4',
						value: value.toArray()
					};

				} else if ( value && value.isMatrix3 ) {

					data.uniforms[ name ] = {
						type: 'm3',
						value: value.toArray()
					};

				} else if ( value && value.isMatrix4 ) {

					data.uniforms[ name ] = {
						type: 'm4',
						value: value.toArray()
					};

				} else {

					data.uniforms[ name ] = {
						value: value
					};

					// note: the array variants v2v, v3v, v4v, m4v and tv are not supported so far

				}

			}

			if ( Object.keys( this.defines ).length > 0 ) { data.defines = this.defines; }

			data.vertexShader = this.vertexShader;
			data.fragmentShader = this.fragmentShader;

			var extensions = {};

			for ( var key in this.extensions ) {

				if ( this.extensions[ key ] === true ) { extensions[ key ] = true; }

			}

			if ( Object.keys( extensions ).length > 0 ) { data.extensions = extensions; }

			return data;

		};

		function Camera() {

			Object3D.call( this );

			this.type = 'Camera';

			this.matrixWorldInverse = new Matrix4();

			this.projectionMatrix = new Matrix4();
			this.projectionMatrixInverse = new Matrix4();

		}

		Camera.prototype = Object.assign( Object.create( Object3D.prototype ), {

			constructor: Camera,

			isCamera: true,

			copy: function ( source, recursive ) {

				Object3D.prototype.copy.call( this, source, recursive );

				this.matrixWorldInverse.copy( source.matrixWorldInverse );

				this.projectionMatrix.copy( source.projectionMatrix );
				this.projectionMatrixInverse.copy( source.projectionMatrixInverse );

				return this;

			},

			getWorldDirection: function ( target ) {

				if ( target === undefined ) {

					console.warn( 'THREE.Camera: .getWorldDirection() target is now required' );
					target = new Vector3();

				}

				this.updateMatrixWorld( true );

				var e = this.matrixWorld.elements;

				return target.set( - e[ 8 ], - e[ 9 ], - e[ 10 ] ).normalize();

			},

			updateMatrixWorld: function ( force ) {

				Object3D.prototype.updateMatrixWorld.call( this, force );

				this.matrixWorldInverse.getInverse( this.matrixWorld );

			},

			updateWorldMatrix: function ( updateParents, updateChildren ) {

				Object3D.prototype.updateWorldMatrix.call( this, updateParents, updateChildren );

				this.matrixWorldInverse.getInverse( this.matrixWorld );

			},

			clone: function () {

				return new this.constructor().copy( this );

			}

		} );

		function PerspectiveCamera( fov, aspect, near, far ) {

			Camera.call( this );

			this.type = 'PerspectiveCamera';

			this.fov = fov !== undefined ? fov : 50;
			this.zoom = 1;

			this.near = near !== undefined ? near : 0.1;
			this.far = far !== undefined ? far : 2000;
			this.focus = 10;

			this.aspect = aspect !== undefined ? aspect : 1;
			this.view = null;

			this.filmGauge = 35;	// width of the film (default in millimeters)
			this.filmOffset = 0;	// horizontal film offset (same unit as gauge)

			this.updateProjectionMatrix();

		}

		PerspectiveCamera.prototype = Object.assign( Object.create( Camera.prototype ), {

			constructor: PerspectiveCamera,

			isPerspectiveCamera: true,

			copy: function ( source, recursive ) {

				Camera.prototype.copy.call( this, source, recursive );

				this.fov = source.fov;
				this.zoom = source.zoom;

				this.near = source.near;
				this.far = source.far;
				this.focus = source.focus;

				this.aspect = source.aspect;
				this.view = source.view === null ? null : Object.assign( {}, source.view );

				this.filmGauge = source.filmGauge;
				this.filmOffset = source.filmOffset;

				return this;

			},

			/**
			 * Sets the FOV by focal length in respect to the current .filmGauge.
			 *
			 * The default film gauge is 35, so that the focal length can be specified for
			 * a 35mm (full frame) camera.
			 *
			 * Values for focal length and film gauge must have the same unit.
			 */
			setFocalLength: function ( focalLength ) {

				// see http://www.bobatkins.com/photography/technical/field_of_view.html
				var vExtentSlope = 0.5 * this.getFilmHeight() / focalLength;

				this.fov = MathUtils.RAD2DEG * 2 * Math.atan( vExtentSlope );
				this.updateProjectionMatrix();

			},

			/**
			 * Calculates the focal length from the current .fov and .filmGauge.
			 */
			getFocalLength: function () {

				var vExtentSlope = Math.tan( MathUtils.DEG2RAD * 0.5 * this.fov );

				return 0.5 * this.getFilmHeight() / vExtentSlope;

			},

			getEffectiveFOV: function () {

				return MathUtils.RAD2DEG * 2 * Math.atan(
					Math.tan( MathUtils.DEG2RAD * 0.5 * this.fov ) / this.zoom );

			},

			getFilmWidth: function () {

				// film not completely covered in portrait format (aspect < 1)
				return this.filmGauge * Math.min( this.aspect, 1 );

			},

			getFilmHeight: function () {

				// film not completely covered in landscape format (aspect > 1)
				return this.filmGauge / Math.max( this.aspect, 1 );

			},

			/**
			 * Sets an offset in a larger frustum. This is useful for multi-window or
			 * multi-monitor/multi-machine setups.
			 *
			 * For example, if you have 3x2 monitors and each monitor is 1920x1080 and
			 * the monitors are in grid like this
			 *
			 *   +---+---+---+
			 *   | A | B | C |
			 *   +---+---+---+
			 *   | D | E | F |
			 *   +---+---+---+
			 *
			 * then for each monitor you would call it like this
			 *
			 *   const w = 1920;
			 *   const h = 1080;
			 *   const fullWidth = w * 3;
			 *   const fullHeight = h * 2;
			 *
			 *   --A--
			 *   camera.setViewOffset( fullWidth, fullHeight, w * 0, h * 0, w, h );
			 *   --B--
			 *   camera.setViewOffset( fullWidth, fullHeight, w * 1, h * 0, w, h );
			 *   --C--
			 *   camera.setViewOffset( fullWidth, fullHeight, w * 2, h * 0, w, h );
			 *   --D--
			 *   camera.setViewOffset( fullWidth, fullHeight, w * 0, h * 1, w, h );
			 *   --E--
			 *   camera.setViewOffset( fullWidth, fullHeight, w * 1, h * 1, w, h );
			 *   --F--
			 *   camera.setViewOffset( fullWidth, fullHeight, w * 2, h * 1, w, h );
			 *
			 *   Note there is no reason monitors have to be the same size or in a grid.
			 */
			setViewOffset: function ( fullWidth, fullHeight, x, y, width, height ) {

				this.aspect = fullWidth / fullHeight;

				if ( this.view === null ) {

					this.view = {
						enabled: true,
						fullWidth: 1,
						fullHeight: 1,
						offsetX: 0,
						offsetY: 0,
						width: 1,
						height: 1
					};

				}

				this.view.enabled = true;
				this.view.fullWidth = fullWidth;
				this.view.fullHeight = fullHeight;
				this.view.offsetX = x;
				this.view.offsetY = y;
				this.view.width = width;
				this.view.height = height;

				this.updateProjectionMatrix();

			},

			clearViewOffset: function () {

				if ( this.view !== null ) {

					this.view.enabled = false;

				}

				this.updateProjectionMatrix();

			},

			updateProjectionMatrix: function () {

				var near = this.near;
				var top = near * Math.tan( MathUtils.DEG2RAD * 0.5 * this.fov ) / this.zoom;
				var height = 2 * top;
				var width = this.aspect * height;
				var left = - 0.5 * width;
				var view = this.view;

				if ( this.view !== null && this.view.enabled ) {

					var fullWidth = view.fullWidth,
						fullHeight = view.fullHeight;

					left += view.offsetX * width / fullWidth;
					top -= view.offsetY * height / fullHeight;
					width *= view.width / fullWidth;
					height *= view.height / fullHeight;

				}

				var skew = this.filmOffset;
				if ( skew !== 0 ) { left += near * skew / this.getFilmWidth(); }

				this.projectionMatrix.makePerspective( left, left + width, top, top - height, near, this.far );

				this.projectionMatrixInverse.getInverse( this.projectionMatrix );

			},

			toJSON: function ( meta ) {

				var data = Object3D.prototype.toJSON.call( this, meta );

				data.object.fov = this.fov;
				data.object.zoom = this.zoom;

				data.object.near = this.near;
				data.object.far = this.far;
				data.object.focus = this.focus;

				data.object.aspect = this.aspect;

				if ( this.view !== null ) { data.object.view = Object.assign( {}, this.view ); }

				data.object.filmGauge = this.filmGauge;
				data.object.filmOffset = this.filmOffset;

				return data;

			}

		} );

		var fov = 90, aspect = 1;

		function CubeCamera( near, far, renderTarget ) {

			Object3D.call( this );

			this.type = 'CubeCamera';

			if ( renderTarget.isWebGLCubeRenderTarget !== true ) {

				console.error( 'THREE.CubeCamera: The constructor now expects an instance of WebGLCubeRenderTarget as third parameter.' );
				return;

			}

			this.renderTarget = renderTarget;

			var cameraPX = new PerspectiveCamera( fov, aspect, near, far );
			cameraPX.layers = this.layers;
			cameraPX.up.set( 0, - 1, 0 );
			cameraPX.lookAt( new Vector3( 1, 0, 0 ) );
			this.add( cameraPX );

			var cameraNX = new PerspectiveCamera( fov, aspect, near, far );
			cameraNX.layers = this.layers;
			cameraNX.up.set( 0, - 1, 0 );
			cameraNX.lookAt( new Vector3( - 1, 0, 0 ) );
			this.add( cameraNX );

			var cameraPY = new PerspectiveCamera( fov, aspect, near, far );
			cameraPY.layers = this.layers;
			cameraPY.up.set( 0, 0, 1 );
			cameraPY.lookAt( new Vector3( 0, 1, 0 ) );
			this.add( cameraPY );

			var cameraNY = new PerspectiveCamera( fov, aspect, near, far );
			cameraNY.layers = this.layers;
			cameraNY.up.set( 0, 0, - 1 );
			cameraNY.lookAt( new Vector3( 0, - 1, 0 ) );
			this.add( cameraNY );

			var cameraPZ = new PerspectiveCamera( fov, aspect, near, far );
			cameraPZ.layers = this.layers;
			cameraPZ.up.set( 0, - 1, 0 );
			cameraPZ.lookAt( new Vector3( 0, 0, 1 ) );
			this.add( cameraPZ );

			var cameraNZ = new PerspectiveCamera( fov, aspect, near, far );
			cameraNZ.layers = this.layers;
			cameraNZ.up.set( 0, - 1, 0 );
			cameraNZ.lookAt( new Vector3( 0, 0, - 1 ) );
			this.add( cameraNZ );

			this.update = function ( renderer, scene ) {

				if ( this.parent === null ) { this.updateMatrixWorld(); }

				var currentXrEnabled = renderer.xr.enabled;
				var currentRenderTarget = renderer.getRenderTarget();

				renderer.xr.enabled = false;

				var generateMipmaps = renderTarget.texture.generateMipmaps;

				renderTarget.texture.generateMipmaps = false;

				renderer.setRenderTarget( renderTarget, 0 );
				renderer.render( scene, cameraPX );

				renderer.setRenderTarget( renderTarget, 1 );
				renderer.render( scene, cameraNX );

				renderer.setRenderTarget( renderTarget, 2 );
				renderer.render( scene, cameraPY );

				renderer.setRenderTarget( renderTarget, 3 );
				renderer.render( scene, cameraNY );

				renderer.setRenderTarget( renderTarget, 4 );
				renderer.render( scene, cameraPZ );

				renderTarget.texture.generateMipmaps = generateMipmaps;

				renderer.setRenderTarget( renderTarget, 5 );
				renderer.render( scene, cameraNZ );

				renderer.setRenderTarget( currentRenderTarget );

				renderer.xr.enabled = currentXrEnabled;

			};

			this.clear = function ( renderer, color, depth, stencil ) {

				var currentRenderTarget = renderer.getRenderTarget();

				for ( var i = 0; i < 6; i ++ ) {

					renderer.setRenderTarget( renderTarget, i );

					renderer.clear( color, depth, stencil );

				}

				renderer.setRenderTarget( currentRenderTarget );

			};

		}

		CubeCamera.prototype = Object.create( Object3D.prototype );
		CubeCamera.prototype.constructor = CubeCamera;

		function WebGLCubeRenderTarget( size, options, dummy ) {

			if ( Number.isInteger( options ) ) {

				console.warn( 'THREE.WebGLCubeRenderTarget: constructor signature is now WebGLCubeRenderTarget( size, options )' );

				options = dummy;

			}

			WebGLRenderTarget.call( this, size, size, options );

			this.texture.isWebGLCubeRenderTargetTexture = true; // HACK Why is texture not a CubeTexture?

		}

		WebGLCubeRenderTarget.prototype = Object.create( WebGLRenderTarget.prototype );
		WebGLCubeRenderTarget.prototype.constructor = WebGLCubeRenderTarget;

		WebGLCubeRenderTarget.prototype.isWebGLCubeRenderTarget = true;

		WebGLCubeRenderTarget.prototype.fromEquirectangularTexture = function ( renderer, texture ) {

			this.texture.type = texture.type;
			this.texture.format = RGBAFormat; // see #18859
			this.texture.encoding = texture.encoding;

			this.texture.generateMipmaps = texture.generateMipmaps;
			this.texture.minFilter = texture.minFilter;
			this.texture.magFilter = texture.magFilter;

			var shader = {

				uniforms: {
					tEquirect: { value: null },
				},

				vertexShader: /* glsl */"\n\n\t\t\tvarying vec3 vWorldDirection;\n\n\t\t\tvec3 transformDirection( in vec3 dir, in mat4 matrix ) {\n\n\t\t\t\treturn normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );\n\n\t\t\t}\n\n\t\t\tvoid main() {\n\n\t\t\t\tvWorldDirection = transformDirection( position, modelMatrix );\n\n\t\t\t\t#include <begin_vertex>\n\t\t\t\t#include <project_vertex>\n\n\t\t\t}\n\t\t",

				fragmentShader: /* glsl */"\n\n\t\t\tuniform sampler2D tEquirect;\n\n\t\t\tvarying vec3 vWorldDirection;\n\n\t\t\t#include <common>\n\n\t\t\tvoid main() {\n\n\t\t\t\tvec3 direction = normalize( vWorldDirection );\n\n\t\t\t\tvec2 sampleUV = equirectUv( direction );\n\n\t\t\t\tgl_FragColor = texture2D( tEquirect, sampleUV );\n\n\t\t\t}\n\t\t"
			};

			var geometry = new BoxBufferGeometry( 5, 5, 5 );

			var material = new ShaderMaterial( {

				name: 'CubemapFromEquirect',

				uniforms: cloneUniforms( shader.uniforms ),
				vertexShader: shader.vertexShader,
				fragmentShader: shader.fragmentShader,
				side: BackSide,
				blending: NoBlending

			} );

			material.uniforms.tEquirect.value = texture;

			var mesh = new Mesh( geometry, material );

			var currentMinFilter = texture.minFilter;

			// Avoid blurred poles
			if ( texture.minFilter === LinearMipmapLinearFilter ) { texture.minFilter = LinearFilter; }

			var camera = new CubeCamera( 1, 10, this );
			camera.update( renderer, mesh );

			texture.minFilter = currentMinFilter;

			mesh.geometry.dispose();
			mesh.material.dispose();

			return this;

		};

		function DataTexture( data, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, encoding ) {

			Texture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );

			this.image = { data: data || null, width: width || 1, height: height || 1 };

			this.magFilter = magFilter !== undefined ? magFilter : NearestFilter;
			this.minFilter = minFilter !== undefined ? minFilter : NearestFilter;

			this.generateMipmaps = false;
			this.flipY = false;
			this.unpackAlignment = 1;

			this.needsUpdate = true;

		}

		DataTexture.prototype = Object.create( Texture.prototype );
		DataTexture.prototype.constructor = DataTexture;

		DataTexture.prototype.isDataTexture = true;

		var _sphere$1 = new Sphere();
		var _vector$5 = new Vector3();

		var Frustum = function Frustum( p0, p1, p2, p3, p4, p5 ) {

			this.planes = [

				( p0 !== undefined ) ? p0 : new Plane(),
				( p1 !== undefined ) ? p1 : new Plane(),
				( p2 !== undefined ) ? p2 : new Plane(),
				( p3 !== undefined ) ? p3 : new Plane(),
				( p4 !== undefined ) ? p4 : new Plane(),
				( p5 !== undefined ) ? p5 : new Plane()

			];

		};

		Frustum.prototype.set = function set ( p0, p1, p2, p3, p4, p5 ) {

			var planes = this.planes;

			planes[ 0 ].copy( p0 );
			planes[ 1 ].copy( p1 );
			planes[ 2 ].copy( p2 );
			planes[ 3 ].copy( p3 );
			planes[ 4 ].copy( p4 );
			planes[ 5 ].copy( p5 );

			return this;

		};

		Frustum.prototype.clone = function clone () {

			return new this.constructor().copy( this );

		};

		Frustum.prototype.copy = function copy ( frustum ) {

			var planes = this.planes;

			for ( var i = 0; i < 6; i ++ ) {

				planes[ i ].copy( frustum.planes[ i ] );

			}

			return this;

		};

		Frustum.prototype.setFromProjectionMatrix = function setFromProjectionMatrix ( m ) {

			var planes = this.planes;
			var me = m.elements;
			var me0 = me[ 0 ], me1 = me[ 1 ], me2 = me[ 2 ], me3 = me[ 3 ];
			var me4 = me[ 4 ], me5 = me[ 5 ], me6 = me[ 6 ], me7 = me[ 7 ];
			var me8 = me[ 8 ], me9 = me[ 9 ], me10 = me[ 10 ], me11 = me[ 11 ];
			var me12 = me[ 12 ], me13 = me[ 13 ], me14 = me[ 14 ], me15 = me[ 15 ];

			planes[ 0 ].setComponents( me3 - me0, me7 - me4, me11 - me8, me15 - me12 ).normalize();
			planes[ 1 ].setComponents( me3 + me0, me7 + me4, me11 + me8, me15 + me12 ).normalize();
			planes[ 2 ].setComponents( me3 + me1, me7 + me5, me11 + me9, me15 + me13 ).normalize();
			planes[ 3 ].setComponents( me3 - me1, me7 - me5, me11 - me9, me15 - me13 ).normalize();
			planes[ 4 ].setComponents( me3 - me2, me7 - me6, me11 - me10, me15 - me14 ).normalize();
			planes[ 5 ].setComponents( me3 + me2, me7 + me6, me11 + me10, me15 + me14 ).normalize();

			return this;

		};

		Frustum.prototype.intersectsObject = function intersectsObject ( object ) {

			var geometry = object.geometry;

			if ( geometry.boundingSphere === null ) { geometry.computeBoundingSphere(); }

			_sphere$1.copy( geometry.boundingSphere ).applyMatrix4( object.matrixWorld );

			return this.intersectsSphere( _sphere$1 );

		};

		Frustum.prototype.intersectsSprite = function intersectsSprite ( sprite ) {

			_sphere$1.center.set( 0, 0, 0 );
			_sphere$1.radius = 0.7071067811865476;
			_sphere$1.applyMatrix4( sprite.matrixWorld );

			return this.intersectsSphere( _sphere$1 );

		};

		Frustum.prototype.intersectsSphere = function intersectsSphere ( sphere ) {

			var planes = this.planes;
			var center = sphere.center;
			var negRadius = - sphere.radius;

			for ( var i = 0; i < 6; i ++ ) {

				var distance = planes[ i ].distanceToPoint( center );

				if ( distance < negRadius ) {

					return false;

				}

			}

			return true;

		};

		Frustum.prototype.intersectsBox = function intersectsBox ( box ) {

			var planes = this.planes;

			for ( var i = 0; i < 6; i ++ ) {

				var plane = planes[ i ];

				// corner at max distance

				_vector$5.x = plane.normal.x > 0 ? box.max.x : box.min.x;
				_vector$5.y = plane.normal.y > 0 ? box.max.y : box.min.y;
				_vector$5.z = plane.normal.z > 0 ? box.max.z : box.min.z;

				if ( plane.distanceToPoint( _vector$5 ) < 0 ) {

					return false;

				}

			}

			return true;

		};

		Frustum.prototype.containsPoint = function containsPoint ( point ) {

			var planes = this.planes;

			for ( var i = 0; i < 6; i ++ ) {

				if ( planes[ i ].distanceToPoint( point ) < 0 ) {

					return false;

				}

			}

			return true;

		};

		function WebGLAnimation() {

			var context = null;
			var isAnimating = false;
			var animationLoop = null;
			var requestId = null;

			function onAnimationFrame( time, frame ) {

				animationLoop( time, frame );

				requestId = context.requestAnimationFrame( onAnimationFrame );

			}

			return {

				start: function () {

					if ( isAnimating === true ) { return; }
					if ( animationLoop === null ) { return; }

					requestId = context.requestAnimationFrame( onAnimationFrame );

					isAnimating = true;

				},

				stop: function () {

					context.cancelAnimationFrame( requestId );

					isAnimating = false;

				},

				setAnimationLoop: function ( callback ) {

					animationLoop = callback;

				},

				setContext: function ( value ) {

					context = value;

				}

			};

		}

		function WebGLAttributes( gl, capabilities ) {

			var isWebGL2 = capabilities.isWebGL2;

			var buffers = new WeakMap();

			function createBuffer( attribute, bufferType ) {

				var array = attribute.array;
				var usage = attribute.usage;

				var buffer = gl.createBuffer();

				gl.bindBuffer( bufferType, buffer );
				gl.bufferData( bufferType, array, usage );

				attribute.onUploadCallback();

				var type = 5126;

				if ( array instanceof Float32Array ) {

					type = 5126;

				} else if ( array instanceof Float64Array ) {

					console.warn( 'THREE.WebGLAttributes: Unsupported data buffer format: Float64Array.' );

				} else if ( array instanceof Uint16Array ) {

					type = 5123;

				} else if ( array instanceof Int16Array ) {

					type = 5122;

				} else if ( array instanceof Uint32Array ) {

					type = 5125;

				} else if ( array instanceof Int32Array ) {

					type = 5124;

				} else if ( array instanceof Int8Array ) {

					type = 5120;

				} else if ( array instanceof Uint8Array ) {

					type = 5121;

				}

				return {
					buffer: buffer,
					type: type,
					bytesPerElement: array.BYTES_PER_ELEMENT,
					version: attribute.version
				};

			}

			function updateBuffer( buffer, attribute, bufferType ) {

				var array = attribute.array;
				var updateRange = attribute.updateRange;

				gl.bindBuffer( bufferType, buffer );

				if ( updateRange.count === - 1 ) {

					// Not using update ranges

					gl.bufferSubData( bufferType, 0, array );

				} else {

					if ( isWebGL2 ) {

						gl.bufferSubData( bufferType, updateRange.offset * array.BYTES_PER_ELEMENT,
							array, updateRange.offset, updateRange.count );

					} else {

						gl.bufferSubData( bufferType, updateRange.offset * array.BYTES_PER_ELEMENT,
							array.subarray( updateRange.offset, updateRange.offset + updateRange.count ) );

					}

					updateRange.count = - 1; // reset range

				}

			}

			//

			function get( attribute ) {

				if ( attribute.isInterleavedBufferAttribute ) { attribute = attribute.data; }

				return buffers.get( attribute );

			}

			function remove( attribute ) {

				if ( attribute.isInterleavedBufferAttribute ) { attribute = attribute.data; }

				var data = buffers.get( attribute );

				if ( data ) {

					gl.deleteBuffer( data.buffer );

					buffers.delete( attribute );

				}

			}

			function update( attribute, bufferType ) {

				if ( attribute.isGLBufferAttribute ) {

					var cached = buffers.get( attribute );

					if ( ! cached || cached.version < attribute.version ) {

						buffers.set( attribute, {
							buffer: attribute.buffer,
							type: attribute.type,
							bytesPerElement: attribute.elementSize,
							version: attribute.version
						} );

					}

					return;

				}

				if ( attribute.isInterleavedBufferAttribute ) { attribute = attribute.data; }

				var data = buffers.get( attribute );

				if ( data === undefined ) {

					buffers.set( attribute, createBuffer( attribute, bufferType ) );

				} else if ( data.version < attribute.version ) {

					updateBuffer( data.buffer, attribute, bufferType );

					data.version = attribute.version;

				}

			}

			return {

				get: get,
				remove: remove,
				update: update

			};

		}

		// PlaneGeometry

			function PlaneGeometry( width, height, widthSegments, heightSegments ) {

				Geometry.call(this);

				this.type = 'PlaneGeometry';

				this.parameters = {
					width: width,
					height: height,
					widthSegments: widthSegments,
					heightSegments: heightSegments
				};

				this.fromBufferGeometry( new PlaneBufferGeometry( width, height, widthSegments, heightSegments ) );
				this.mergeVertices();

			}

			PlaneGeometry.prototype = Object.create( Geometry.prototype );
			PlaneGeometry.prototype.constructor = PlaneGeometry;

		// PlaneBufferGeometry

			function PlaneBufferGeometry( width, height, widthSegments, heightSegments ) {

				BufferGeometry.call(this);
				this.type = 'PlaneBufferGeometry';

				this.parameters = {
					width: width,
					height: height,
					widthSegments: widthSegments,
					heightSegments: heightSegments
				};

				width = width || 1;
				height = height || 1;

				var width_half = width / 2;
				var height_half = height / 2;

				var gridX = Math.floor( widthSegments ) || 1;
				var gridY = Math.floor( heightSegments ) || 1;

				var gridX1 = gridX + 1;
				var gridY1 = gridY + 1;

				var segment_width = width / gridX;
				var segment_height = height / gridY;

				// buffers

				var indices = [];
				var vertices = [];
				var normals = [];
				var uvs = [];

				// generate vertices, normals and uvs

				for ( var iy = 0; iy < gridY1; iy ++ ) {

					var y = iy * segment_height - height_half;

					for ( var ix = 0; ix < gridX1; ix ++ ) {

						var x = ix * segment_width - width_half;

						vertices.push( x, - y, 0 );

						normals.push( 0, 0, 1 );

						uvs.push( ix / gridX );
						uvs.push( 1 - ( iy / gridY ) );

					}

				}

				// indices

				for ( var iy$1 = 0; iy$1 < gridY; iy$1 ++ ) {

					for ( var ix$1 = 0; ix$1 < gridX; ix$1 ++ ) {

						var a = ix$1 + gridX1 * iy$1;
						var b = ix$1 + gridX1 * ( iy$1 + 1 );
						var c = ( ix$1 + 1 ) + gridX1 * ( iy$1 + 1 );
						var d = ( ix$1 + 1 ) + gridX1 * iy$1;

						// faces

						indices.push( a, b, d );
						indices.push( b, c, d );

					}

				}

				// build geometry

				this.setIndex( indices );
				this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
				this.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
				this.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

			}

			PlaneBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
			PlaneBufferGeometry.prototype.constructor = PlaneBufferGeometry;

		var alphamap_fragment = "#ifdef USE_ALPHAMAP\n\tdiffuseColor.a *= texture2D( alphaMap, vUv ).g;\n#endif";

		var alphamap_pars_fragment = "#ifdef USE_ALPHAMAP\n\tuniform sampler2D alphaMap;\n#endif";

		var alphatest_fragment = "#ifdef ALPHATEST\n\tif ( diffuseColor.a < ALPHATEST ) discard;\n#endif";

		var aomap_fragment = "#ifdef USE_AOMAP\n\tfloat ambientOcclusion = ( texture2D( aoMap, vUv2 ).r - 1.0 ) * aoMapIntensity + 1.0;\n\treflectedLight.indirectDiffuse *= ambientOcclusion;\n\t#if defined( USE_ENVMAP ) && defined( STANDARD )\n\t\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\n\t\treflectedLight.indirectSpecular *= computeSpecularOcclusion( dotNV, ambientOcclusion, material.specularRoughness );\n\t#endif\n#endif";

		var aomap_pars_fragment = "#ifdef USE_AOMAP\n\tuniform sampler2D aoMap;\n\tuniform float aoMapIntensity;\n#endif";

		var begin_vertex = "vec3 transformed = vec3( position );";

		var beginnormal_vertex = "vec3 objectNormal = vec3( normal );\n#ifdef USE_TANGENT\n\tvec3 objectTangent = vec3( tangent.xyz );\n#endif";

		var bsdfs = "vec2 integrateSpecularBRDF( const in float dotNV, const in float roughness ) {\n\tconst vec4 c0 = vec4( - 1, - 0.0275, - 0.572, 0.022 );\n\tconst vec4 c1 = vec4( 1, 0.0425, 1.04, - 0.04 );\n\tvec4 r = roughness * c0 + c1;\n\tfloat a004 = min( r.x * r.x, exp2( - 9.28 * dotNV ) ) * r.x + r.y;\n\treturn vec2( -1.04, 1.04 ) * a004 + r.zw;\n}\nfloat punctualLightIntensityToIrradianceFactor( const in float lightDistance, const in float cutoffDistance, const in float decayExponent ) {\n#if defined ( PHYSICALLY_CORRECT_LIGHTS )\n\tfloat distanceFalloff = 1.0 / max( pow( lightDistance, decayExponent ), 0.01 );\n\tif( cutoffDistance > 0.0 ) {\n\t\tdistanceFalloff *= pow2( saturate( 1.0 - pow4( lightDistance / cutoffDistance ) ) );\n\t}\n\treturn distanceFalloff;\n#else\n\tif( cutoffDistance > 0.0 && decayExponent > 0.0 ) {\n\t\treturn pow( saturate( -lightDistance / cutoffDistance + 1.0 ), decayExponent );\n\t}\n\treturn 1.0;\n#endif\n}\nvec3 BRDF_Diffuse_Lambert( const in vec3 diffuseColor ) {\n\treturn RECIPROCAL_PI * diffuseColor;\n}\nvec3 F_Schlick( const in vec3 specularColor, const in float dotLH ) {\n\tfloat fresnel = exp2( ( -5.55473 * dotLH - 6.98316 ) * dotLH );\n\treturn ( 1.0 - specularColor ) * fresnel + specularColor;\n}\nvec3 F_Schlick_RoughnessDependent( const in vec3 F0, const in float dotNV, const in float roughness ) {\n\tfloat fresnel = exp2( ( -5.55473 * dotNV - 6.98316 ) * dotNV );\n\tvec3 Fr = max( vec3( 1.0 - roughness ), F0 ) - F0;\n\treturn Fr * fresnel + F0;\n}\nfloat G_GGX_Smith( const in float alpha, const in float dotNL, const in float dotNV ) {\n\tfloat a2 = pow2( alpha );\n\tfloat gl = dotNL + sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );\n\tfloat gv = dotNV + sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );\n\treturn 1.0 / ( gl * gv );\n}\nfloat G_GGX_SmithCorrelated( const in float alpha, const in float dotNL, const in float dotNV ) {\n\tfloat a2 = pow2( alpha );\n\tfloat gv = dotNL * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );\n\tfloat gl = dotNV * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );\n\treturn 0.5 / max( gv + gl, EPSILON );\n}\nfloat D_GGX( const in float alpha, const in float dotNH ) {\n\tfloat a2 = pow2( alpha );\n\tfloat denom = pow2( dotNH ) * ( a2 - 1.0 ) + 1.0;\n\treturn RECIPROCAL_PI * a2 / pow2( denom );\n}\nvec3 BRDF_Specular_GGX( const in IncidentLight incidentLight, const in vec3 viewDir, const in vec3 normal, const in vec3 specularColor, const in float roughness ) {\n\tfloat alpha = pow2( roughness );\n\tvec3 halfDir = normalize( incidentLight.direction + viewDir );\n\tfloat dotNL = saturate( dot( normal, incidentLight.direction ) );\n\tfloat dotNV = saturate( dot( normal, viewDir ) );\n\tfloat dotNH = saturate( dot( normal, halfDir ) );\n\tfloat dotLH = saturate( dot( incidentLight.direction, halfDir ) );\n\tvec3 F = F_Schlick( specularColor, dotLH );\n\tfloat G = G_GGX_SmithCorrelated( alpha, dotNL, dotNV );\n\tfloat D = D_GGX( alpha, dotNH );\n\treturn F * ( G * D );\n}\nvec2 LTC_Uv( const in vec3 N, const in vec3 V, const in float roughness ) {\n\tconst float LUT_SIZE = 64.0;\n\tconst float LUT_SCALE = ( LUT_SIZE - 1.0 ) / LUT_SIZE;\n\tconst float LUT_BIAS = 0.5 / LUT_SIZE;\n\tfloat dotNV = saturate( dot( N, V ) );\n\tvec2 uv = vec2( roughness, sqrt( 1.0 - dotNV ) );\n\tuv = uv * LUT_SCALE + LUT_BIAS;\n\treturn uv;\n}\nfloat LTC_ClippedSphereFormFactor( const in vec3 f ) {\n\tfloat l = length( f );\n\treturn max( ( l * l + f.z ) / ( l + 1.0 ), 0.0 );\n}\nvec3 LTC_EdgeVectorFormFactor( const in vec3 v1, const in vec3 v2 ) {\n\tfloat x = dot( v1, v2 );\n\tfloat y = abs( x );\n\tfloat a = 0.8543985 + ( 0.4965155 + 0.0145206 * y ) * y;\n\tfloat b = 3.4175940 + ( 4.1616724 + y ) * y;\n\tfloat v = a / b;\n\tfloat theta_sintheta = ( x > 0.0 ) ? v : 0.5 * inversesqrt( max( 1.0 - x * x, 1e-7 ) ) - v;\n\treturn cross( v1, v2 ) * theta_sintheta;\n}\nvec3 LTC_Evaluate( const in vec3 N, const in vec3 V, const in vec3 P, const in mat3 mInv, const in vec3 rectCoords[ 4 ] ) {\n\tvec3 v1 = rectCoords[ 1 ] - rectCoords[ 0 ];\n\tvec3 v2 = rectCoords[ 3 ] - rectCoords[ 0 ];\n\tvec3 lightNormal = cross( v1, v2 );\n\tif( dot( lightNormal, P - rectCoords[ 0 ] ) < 0.0 ) return vec3( 0.0 );\n\tvec3 T1, T2;\n\tT1 = normalize( V - N * dot( V, N ) );\n\tT2 = - cross( N, T1 );\n\tmat3 mat = mInv * transposeMat3( mat3( T1, T2, N ) );\n\tvec3 coords[ 4 ];\n\tcoords[ 0 ] = mat * ( rectCoords[ 0 ] - P );\n\tcoords[ 1 ] = mat * ( rectCoords[ 1 ] - P );\n\tcoords[ 2 ] = mat * ( rectCoords[ 2 ] - P );\n\tcoords[ 3 ] = mat * ( rectCoords[ 3 ] - P );\n\tcoords[ 0 ] = normalize( coords[ 0 ] );\n\tcoords[ 1 ] = normalize( coords[ 1 ] );\n\tcoords[ 2 ] = normalize( coords[ 2 ] );\n\tcoords[ 3 ] = normalize( coords[ 3 ] );\n\tvec3 vectorFormFactor = vec3( 0.0 );\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 0 ], coords[ 1 ] );\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 1 ], coords[ 2 ] );\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 2 ], coords[ 3 ] );\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 3 ], coords[ 0 ] );\n\tfloat result = LTC_ClippedSphereFormFactor( vectorFormFactor );\n\treturn vec3( result );\n}\nvec3 BRDF_Specular_GGX_Environment( const in vec3 viewDir, const in vec3 normal, const in vec3 specularColor, const in float roughness ) {\n\tfloat dotNV = saturate( dot( normal, viewDir ) );\n\tvec2 brdf = integrateSpecularBRDF( dotNV, roughness );\n\treturn specularColor * brdf.x + brdf.y;\n}\nvoid BRDF_Specular_Multiscattering_Environment( const in GeometricContext geometry, const in vec3 specularColor, const in float roughness, inout vec3 singleScatter, inout vec3 multiScatter ) {\n\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\n\tvec3 F = F_Schlick_RoughnessDependent( specularColor, dotNV, roughness );\n\tvec2 brdf = integrateSpecularBRDF( dotNV, roughness );\n\tvec3 FssEss = F * brdf.x + brdf.y;\n\tfloat Ess = brdf.x + brdf.y;\n\tfloat Ems = 1.0 - Ess;\n\tvec3 Favg = specularColor + ( 1.0 - specularColor ) * 0.047619;\tvec3 Fms = FssEss * Favg / ( 1.0 - Ems * Favg );\n\tsingleScatter += FssEss;\n\tmultiScatter += Fms * Ems;\n}\nfloat G_BlinnPhong_Implicit( ) {\n\treturn 0.25;\n}\nfloat D_BlinnPhong( const in float shininess, const in float dotNH ) {\n\treturn RECIPROCAL_PI * ( shininess * 0.5 + 1.0 ) * pow( dotNH, shininess );\n}\nvec3 BRDF_Specular_BlinnPhong( const in IncidentLight incidentLight, const in GeometricContext geometry, const in vec3 specularColor, const in float shininess ) {\n\tvec3 halfDir = normalize( incidentLight.direction + geometry.viewDir );\n\tfloat dotNH = saturate( dot( geometry.normal, halfDir ) );\n\tfloat dotLH = saturate( dot( incidentLight.direction, halfDir ) );\n\tvec3 F = F_Schlick( specularColor, dotLH );\n\tfloat G = G_BlinnPhong_Implicit( );\n\tfloat D = D_BlinnPhong( shininess, dotNH );\n\treturn F * ( G * D );\n}\nfloat GGXRoughnessToBlinnExponent( const in float ggxRoughness ) {\n\treturn ( 2.0 / pow2( ggxRoughness + 0.0001 ) - 2.0 );\n}\nfloat BlinnExponentToGGXRoughness( const in float blinnExponent ) {\n\treturn sqrt( 2.0 / ( blinnExponent + 2.0 ) );\n}\n#if defined( USE_SHEEN )\nfloat D_Charlie(float roughness, float NoH) {\n\tfloat invAlpha = 1.0 / roughness;\n\tfloat cos2h = NoH * NoH;\n\tfloat sin2h = max(1.0 - cos2h, 0.0078125);\treturn (2.0 + invAlpha) * pow(sin2h, invAlpha * 0.5) / (2.0 * PI);\n}\nfloat V_Neubelt(float NoV, float NoL) {\n\treturn saturate(1.0 / (4.0 * (NoL + NoV - NoL * NoV)));\n}\nvec3 BRDF_Specular_Sheen( const in float roughness, const in vec3 L, const in GeometricContext geometry, vec3 specularColor ) {\n\tvec3 N = geometry.normal;\n\tvec3 V = geometry.viewDir;\n\tvec3 H = normalize( V + L );\n\tfloat dotNH = saturate( dot( N, H ) );\n\treturn specularColor * D_Charlie( roughness, dotNH ) * V_Neubelt( dot(N, V), dot(N, L) );\n}\n#endif";

		var bumpmap_pars_fragment = "#ifdef USE_BUMPMAP\n\tuniform sampler2D bumpMap;\n\tuniform float bumpScale;\n\tvec2 dHdxy_fwd() {\n\t\tvec2 dSTdx = dFdx( vUv );\n\t\tvec2 dSTdy = dFdy( vUv );\n\t\tfloat Hll = bumpScale * texture2D( bumpMap, vUv ).x;\n\t\tfloat dBx = bumpScale * texture2D( bumpMap, vUv + dSTdx ).x - Hll;\n\t\tfloat dBy = bumpScale * texture2D( bumpMap, vUv + dSTdy ).x - Hll;\n\t\treturn vec2( dBx, dBy );\n\t}\n\tvec3 perturbNormalArb( vec3 surf_pos, vec3 surf_norm, vec2 dHdxy ) {\n\t\tvec3 vSigmaX = vec3( dFdx( surf_pos.x ), dFdx( surf_pos.y ), dFdx( surf_pos.z ) );\n\t\tvec3 vSigmaY = vec3( dFdy( surf_pos.x ), dFdy( surf_pos.y ), dFdy( surf_pos.z ) );\n\t\tvec3 vN = surf_norm;\n\t\tvec3 R1 = cross( vSigmaY, vN );\n\t\tvec3 R2 = cross( vN, vSigmaX );\n\t\tfloat fDet = dot( vSigmaX, R1 );\n\t\tfDet *= ( float( gl_FrontFacing ) * 2.0 - 1.0 );\n\t\tvec3 vGrad = sign( fDet ) * ( dHdxy.x * R1 + dHdxy.y * R2 );\n\t\treturn normalize( abs( fDet ) * surf_norm - vGrad );\n\t}\n#endif";

		var clipping_planes_fragment = "#if NUM_CLIPPING_PLANES > 0\n\tvec4 plane;\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < UNION_CLIPPING_PLANES; i ++ ) {\n\t\tplane = clippingPlanes[ i ];\n\t\tif ( dot( vClipPosition, plane.xyz ) > plane.w ) discard;\n\t}\n\t#pragma unroll_loop_end\n\t#if UNION_CLIPPING_PLANES < NUM_CLIPPING_PLANES\n\t\tbool clipped = true;\n\t\t#pragma unroll_loop_start\n\t\tfor ( int i = UNION_CLIPPING_PLANES; i < NUM_CLIPPING_PLANES; i ++ ) {\n\t\t\tplane = clippingPlanes[ i ];\n\t\t\tclipped = ( dot( vClipPosition, plane.xyz ) > plane.w ) && clipped;\n\t\t}\n\t\t#pragma unroll_loop_end\n\t\tif ( clipped ) discard;\n\t#endif\n#endif";

		var clipping_planes_pars_fragment = "#if NUM_CLIPPING_PLANES > 0\n\tvarying vec3 vClipPosition;\n\tuniform vec4 clippingPlanes[ NUM_CLIPPING_PLANES ];\n#endif";

		var clipping_planes_pars_vertex = "#if NUM_CLIPPING_PLANES > 0\n\tvarying vec3 vClipPosition;\n#endif";

		var clipping_planes_vertex = "#if NUM_CLIPPING_PLANES > 0\n\tvClipPosition = - mvPosition.xyz;\n#endif";

		var color_fragment = "#ifdef USE_COLOR\n\tdiffuseColor.rgb *= vColor;\n#endif";

		var color_pars_fragment = "#ifdef USE_COLOR\n\tvarying vec3 vColor;\n#endif";

		var color_pars_vertex = "#if defined( USE_COLOR ) || defined( USE_INSTANCING_COLOR )\n\tvarying vec3 vColor;\n#endif";

		var color_vertex = "#if defined( USE_COLOR ) || defined( USE_INSTANCING_COLOR )\n\tvColor = vec3( 1.0 );\n#endif\n#ifdef USE_COLOR\n\tvColor.xyz *= color.xyz;\n#endif\n#ifdef USE_INSTANCING_COLOR\n\tvColor.xyz *= instanceColor.xyz;\n#endif";

		var common = "#define PI 3.141592653589793\n#define PI2 6.283185307179586\n#define PI_HALF 1.5707963267948966\n#define RECIPROCAL_PI 0.3183098861837907\n#define RECIPROCAL_PI2 0.15915494309189535\n#define EPSILON 1e-6\n#ifndef saturate\n#define saturate(a) clamp( a, 0.0, 1.0 )\n#endif\n#define whiteComplement(a) ( 1.0 - saturate( a ) )\nfloat pow2( const in float x ) { return x*x; }\nfloat pow3( const in float x ) { return x*x*x; }\nfloat pow4( const in float x ) { float x2 = x*x; return x2*x2; }\nfloat average( const in vec3 color ) { return dot( color, vec3( 0.3333 ) ); }\nhighp float rand( const in vec2 uv ) {\n\tconst highp float a = 12.9898, b = 78.233, c = 43758.5453;\n\thighp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );\n\treturn fract(sin(sn) * c);\n}\n#ifdef HIGH_PRECISION\n\tfloat precisionSafeLength( vec3 v ) { return length( v ); }\n#else\n\tfloat max3( vec3 v ) { return max( max( v.x, v.y ), v.z ); }\n\tfloat precisionSafeLength( vec3 v ) {\n\t\tfloat maxComponent = max3( abs( v ) );\n\t\treturn length( v / maxComponent ) * maxComponent;\n\t}\n#endif\nstruct IncidentLight {\n\tvec3 color;\n\tvec3 direction;\n\tbool visible;\n};\nstruct ReflectedLight {\n\tvec3 directDiffuse;\n\tvec3 directSpecular;\n\tvec3 indirectDiffuse;\n\tvec3 indirectSpecular;\n};\nstruct GeometricContext {\n\tvec3 position;\n\tvec3 normal;\n\tvec3 viewDir;\n#ifdef CLEARCOAT\n\tvec3 clearcoatNormal;\n#endif\n};\nvec3 transformDirection( in vec3 dir, in mat4 matrix ) {\n\treturn normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );\n}\nvec3 inverseTransformDirection( in vec3 dir, in mat4 matrix ) {\n\treturn normalize( ( vec4( dir, 0.0 ) * matrix ).xyz );\n}\nvec3 projectOnPlane(in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {\n\tfloat distance = dot( planeNormal, point - pointOnPlane );\n\treturn - distance * planeNormal + point;\n}\nfloat sideOfPlane( in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {\n\treturn sign( dot( point - pointOnPlane, planeNormal ) );\n}\nvec3 linePlaneIntersect( in vec3 pointOnLine, in vec3 lineDirection, in vec3 pointOnPlane, in vec3 planeNormal ) {\n\treturn lineDirection * ( dot( planeNormal, pointOnPlane - pointOnLine ) / dot( planeNormal, lineDirection ) ) + pointOnLine;\n}\nmat3 transposeMat3( const in mat3 m ) {\n\tmat3 tmp;\n\ttmp[ 0 ] = vec3( m[ 0 ].x, m[ 1 ].x, m[ 2 ].x );\n\ttmp[ 1 ] = vec3( m[ 0 ].y, m[ 1 ].y, m[ 2 ].y );\n\ttmp[ 2 ] = vec3( m[ 0 ].z, m[ 1 ].z, m[ 2 ].z );\n\treturn tmp;\n}\nfloat linearToRelativeLuminance( const in vec3 color ) {\n\tvec3 weights = vec3( 0.2126, 0.7152, 0.0722 );\n\treturn dot( weights, color.rgb );\n}\nbool isPerspectiveMatrix( mat4 m ) {\n\treturn m[ 2 ][ 3 ] == - 1.0;\n}\nvec2 equirectUv( in vec3 dir ) {\n\tfloat u = atan( dir.z, dir.x ) * RECIPROCAL_PI2 + 0.5;\n\tfloat v = asin( clamp( dir.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\n\treturn vec2( u, v );\n}";

		var cube_uv_reflection_fragment = "#ifdef ENVMAP_TYPE_CUBE_UV\n\t#define cubeUV_maxMipLevel 8.0\n\t#define cubeUV_minMipLevel 4.0\n\t#define cubeUV_maxTileSize 256.0\n\t#define cubeUV_minTileSize 16.0\n\tfloat getFace( vec3 direction ) {\n\t\tvec3 absDirection = abs( direction );\n\t\tfloat face = - 1.0;\n\t\tif ( absDirection.x > absDirection.z ) {\n\t\t\tif ( absDirection.x > absDirection.y )\n\t\t\t\tface = direction.x > 0.0 ? 0.0 : 3.0;\n\t\t\telse\n\t\t\t\tface = direction.y > 0.0 ? 1.0 : 4.0;\n\t\t} else {\n\t\t\tif ( absDirection.z > absDirection.y )\n\t\t\t\tface = direction.z > 0.0 ? 2.0 : 5.0;\n\t\t\telse\n\t\t\t\tface = direction.y > 0.0 ? 1.0 : 4.0;\n\t\t}\n\t\treturn face;\n\t}\n\tvec2 getUV( vec3 direction, float face ) {\n\t\tvec2 uv;\n\t\tif ( face == 0.0 ) {\n\t\t\tuv = vec2( direction.z, direction.y ) / abs( direction.x );\n\t\t} else if ( face == 1.0 ) {\n\t\t\tuv = vec2( - direction.x, - direction.z ) / abs( direction.y );\n\t\t} else if ( face == 2.0 ) {\n\t\t\tuv = vec2( - direction.x, direction.y ) / abs( direction.z );\n\t\t} else if ( face == 3.0 ) {\n\t\t\tuv = vec2( - direction.z, direction.y ) / abs( direction.x );\n\t\t} else if ( face == 4.0 ) {\n\t\t\tuv = vec2( - direction.x, direction.z ) / abs( direction.y );\n\t\t} else {\n\t\t\tuv = vec2( direction.x, direction.y ) / abs( direction.z );\n\t\t}\n\t\treturn 0.5 * ( uv + 1.0 );\n\t}\n\tvec3 bilinearCubeUV( sampler2D envMap, vec3 direction, float mipInt ) {\n\t\tfloat face = getFace( direction );\n\t\tfloat filterInt = max( cubeUV_minMipLevel - mipInt, 0.0 );\n\t\tmipInt = max( mipInt, cubeUV_minMipLevel );\n\t\tfloat faceSize = exp2( mipInt );\n\t\tfloat texelSize = 1.0 / ( 3.0 * cubeUV_maxTileSize );\n\t\tvec2 uv = getUV( direction, face ) * ( faceSize - 1.0 );\n\t\tvec2 f = fract( uv );\n\t\tuv += 0.5 - f;\n\t\tif ( face > 2.0 ) {\n\t\t\tuv.y += faceSize;\n\t\t\tface -= 3.0;\n\t\t}\n\t\tuv.x += face * faceSize;\n\t\tif ( mipInt < cubeUV_maxMipLevel ) {\n\t\t\tuv.y += 2.0 * cubeUV_maxTileSize;\n\t\t}\n\t\tuv.y += filterInt * 2.0 * cubeUV_minTileSize;\n\t\tuv.x += 3.0 * max( 0.0, cubeUV_maxTileSize - 2.0 * faceSize );\n\t\tuv *= texelSize;\n\t\tvec3 tl = envMapTexelToLinear( texture2D( envMap, uv ) ).rgb;\n\t\tuv.x += texelSize;\n\t\tvec3 tr = envMapTexelToLinear( texture2D( envMap, uv ) ).rgb;\n\t\tuv.y += texelSize;\n\t\tvec3 br = envMapTexelToLinear( texture2D( envMap, uv ) ).rgb;\n\t\tuv.x -= texelSize;\n\t\tvec3 bl = envMapTexelToLinear( texture2D( envMap, uv ) ).rgb;\n\t\tvec3 tm = mix( tl, tr, f.x );\n\t\tvec3 bm = mix( bl, br, f.x );\n\t\treturn mix( tm, bm, f.y );\n\t}\n\t#define r0 1.0\n\t#define v0 0.339\n\t#define m0 - 2.0\n\t#define r1 0.8\n\t#define v1 0.276\n\t#define m1 - 1.0\n\t#define r4 0.4\n\t#define v4 0.046\n\t#define m4 2.0\n\t#define r5 0.305\n\t#define v5 0.016\n\t#define m5 3.0\n\t#define r6 0.21\n\t#define v6 0.0038\n\t#define m6 4.0\n\tfloat roughnessToMip( float roughness ) {\n\t\tfloat mip = 0.0;\n\t\tif ( roughness >= r1 ) {\n\t\t\tmip = ( r0 - roughness ) * ( m1 - m0 ) / ( r0 - r1 ) + m0;\n\t\t} else if ( roughness >= r4 ) {\n\t\t\tmip = ( r1 - roughness ) * ( m4 - m1 ) / ( r1 - r4 ) + m1;\n\t\t} else if ( roughness >= r5 ) {\n\t\t\tmip = ( r4 - roughness ) * ( m5 - m4 ) / ( r4 - r5 ) + m4;\n\t\t} else if ( roughness >= r6 ) {\n\t\t\tmip = ( r5 - roughness ) * ( m6 - m5 ) / ( r5 - r6 ) + m5;\n\t\t} else {\n\t\t\tmip = - 2.0 * log2( 1.16 * roughness );\t\t}\n\t\treturn mip;\n\t}\n\tvec4 textureCubeUV( sampler2D envMap, vec3 sampleDir, float roughness ) {\n\t\tfloat mip = clamp( roughnessToMip( roughness ), m0, cubeUV_maxMipLevel );\n\t\tfloat mipF = fract( mip );\n\t\tfloat mipInt = floor( mip );\n\t\tvec3 color0 = bilinearCubeUV( envMap, sampleDir, mipInt );\n\t\tif ( mipF == 0.0 ) {\n\t\t\treturn vec4( color0, 1.0 );\n\t\t} else {\n\t\t\tvec3 color1 = bilinearCubeUV( envMap, sampleDir, mipInt + 1.0 );\n\t\t\treturn vec4( mix( color0, color1, mipF ), 1.0 );\n\t\t}\n\t}\n#endif";

		var defaultnormal_vertex = "vec3 transformedNormal = objectNormal;\n#ifdef USE_INSTANCING\n\tmat3 m = mat3( instanceMatrix );\n\ttransformedNormal /= vec3( dot( m[ 0 ], m[ 0 ] ), dot( m[ 1 ], m[ 1 ] ), dot( m[ 2 ], m[ 2 ] ) );\n\ttransformedNormal = m * transformedNormal;\n#endif\ntransformedNormal = normalMatrix * transformedNormal;\n#ifdef FLIP_SIDED\n\ttransformedNormal = - transformedNormal;\n#endif\n#ifdef USE_TANGENT\n\tvec3 transformedTangent = ( modelViewMatrix * vec4( objectTangent, 0.0 ) ).xyz;\n\t#ifdef FLIP_SIDED\n\t\ttransformedTangent = - transformedTangent;\n\t#endif\n#endif";

		var displacementmap_pars_vertex = "#ifdef USE_DISPLACEMENTMAP\n\tuniform sampler2D displacementMap;\n\tuniform float displacementScale;\n\tuniform float displacementBias;\n#endif";

		var displacementmap_vertex = "#ifdef USE_DISPLACEMENTMAP\n\ttransformed += normalize( objectNormal ) * ( texture2D( displacementMap, vUv ).x * displacementScale + displacementBias );\n#endif";

		var emissivemap_fragment = "#ifdef USE_EMISSIVEMAP\n\tvec4 emissiveColor = texture2D( emissiveMap, vUv );\n\temissiveColor.rgb = emissiveMapTexelToLinear( emissiveColor ).rgb;\n\ttotalEmissiveRadiance *= emissiveColor.rgb;\n#endif";

		var emissivemap_pars_fragment = "#ifdef USE_EMISSIVEMAP\n\tuniform sampler2D emissiveMap;\n#endif";

		var encodings_fragment = "gl_FragColor = linearToOutputTexel( gl_FragColor );";

		var encodings_pars_fragment = "\nvec4 LinearToLinear( in vec4 value ) {\n\treturn value;\n}\nvec4 GammaToLinear( in vec4 value, in float gammaFactor ) {\n\treturn vec4( pow( value.rgb, vec3( gammaFactor ) ), value.a );\n}\nvec4 LinearToGamma( in vec4 value, in float gammaFactor ) {\n\treturn vec4( pow( value.rgb, vec3( 1.0 / gammaFactor ) ), value.a );\n}\nvec4 sRGBToLinear( in vec4 value ) {\n\treturn vec4( mix( pow( value.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), value.rgb * 0.0773993808, vec3( lessThanEqual( value.rgb, vec3( 0.04045 ) ) ) ), value.a );\n}\nvec4 LinearTosRGB( in vec4 value ) {\n\treturn vec4( mix( pow( value.rgb, vec3( 0.41666 ) ) * 1.055 - vec3( 0.055 ), value.rgb * 12.92, vec3( lessThanEqual( value.rgb, vec3( 0.0031308 ) ) ) ), value.a );\n}\nvec4 RGBEToLinear( in vec4 value ) {\n\treturn vec4( value.rgb * exp2( value.a * 255.0 - 128.0 ), 1.0 );\n}\nvec4 LinearToRGBE( in vec4 value ) {\n\tfloat maxComponent = max( max( value.r, value.g ), value.b );\n\tfloat fExp = clamp( ceil( log2( maxComponent ) ), -128.0, 127.0 );\n\treturn vec4( value.rgb / exp2( fExp ), ( fExp + 128.0 ) / 255.0 );\n}\nvec4 RGBMToLinear( in vec4 value, in float maxRange ) {\n\treturn vec4( value.rgb * value.a * maxRange, 1.0 );\n}\nvec4 LinearToRGBM( in vec4 value, in float maxRange ) {\n\tfloat maxRGB = max( value.r, max( value.g, value.b ) );\n\tfloat M = clamp( maxRGB / maxRange, 0.0, 1.0 );\n\tM = ceil( M * 255.0 ) / 255.0;\n\treturn vec4( value.rgb / ( M * maxRange ), M );\n}\nvec4 RGBDToLinear( in vec4 value, in float maxRange ) {\n\treturn vec4( value.rgb * ( ( maxRange / 255.0 ) / value.a ), 1.0 );\n}\nvec4 LinearToRGBD( in vec4 value, in float maxRange ) {\n\tfloat maxRGB = max( value.r, max( value.g, value.b ) );\n\tfloat D = max( maxRange / maxRGB, 1.0 );\n\tD = clamp( floor( D ) / 255.0, 0.0, 1.0 );\n\treturn vec4( value.rgb * ( D * ( 255.0 / maxRange ) ), D );\n}\nconst mat3 cLogLuvM = mat3( 0.2209, 0.3390, 0.4184, 0.1138, 0.6780, 0.7319, 0.0102, 0.1130, 0.2969 );\nvec4 LinearToLogLuv( in vec4 value ) {\n\tvec3 Xp_Y_XYZp = cLogLuvM * value.rgb;\n\tXp_Y_XYZp = max( Xp_Y_XYZp, vec3( 1e-6, 1e-6, 1e-6 ) );\n\tvec4 vResult;\n\tvResult.xy = Xp_Y_XYZp.xy / Xp_Y_XYZp.z;\n\tfloat Le = 2.0 * log2(Xp_Y_XYZp.y) + 127.0;\n\tvResult.w = fract( Le );\n\tvResult.z = ( Le - ( floor( vResult.w * 255.0 ) ) / 255.0 ) / 255.0;\n\treturn vResult;\n}\nconst mat3 cLogLuvInverseM = mat3( 6.0014, -2.7008, -1.7996, -1.3320, 3.1029, -5.7721, 0.3008, -1.0882, 5.6268 );\nvec4 LogLuvToLinear( in vec4 value ) {\n\tfloat Le = value.z * 255.0 + value.w;\n\tvec3 Xp_Y_XYZp;\n\tXp_Y_XYZp.y = exp2( ( Le - 127.0 ) / 2.0 );\n\tXp_Y_XYZp.z = Xp_Y_XYZp.y / value.y;\n\tXp_Y_XYZp.x = value.x * Xp_Y_XYZp.z;\n\tvec3 vRGB = cLogLuvInverseM * Xp_Y_XYZp.rgb;\n\treturn vec4( max( vRGB, 0.0 ), 1.0 );\n}";

		var envmap_fragment = "#ifdef USE_ENVMAP\n\t#ifdef ENV_WORLDPOS\n\t\tvec3 cameraToFrag;\n\t\tif ( isOrthographic ) {\n\t\t\tcameraToFrag = normalize( vec3( - viewMatrix[ 0 ][ 2 ], - viewMatrix[ 1 ][ 2 ], - viewMatrix[ 2 ][ 2 ] ) );\n\t\t} else {\n\t\t\tcameraToFrag = normalize( vWorldPosition - cameraPosition );\n\t\t}\n\t\tvec3 worldNormal = inverseTransformDirection( normal, viewMatrix );\n\t\t#ifdef ENVMAP_MODE_REFLECTION\n\t\t\tvec3 reflectVec = reflect( cameraToFrag, worldNormal );\n\t\t#else\n\t\t\tvec3 reflectVec = refract( cameraToFrag, worldNormal, refractionRatio );\n\t\t#endif\n\t#else\n\t\tvec3 reflectVec = vReflect;\n\t#endif\n\t#ifdef ENVMAP_TYPE_CUBE\n\t\tvec4 envColor = textureCube( envMap, vec3( flipEnvMap * reflectVec.x, reflectVec.yz ) );\n\t#elif defined( ENVMAP_TYPE_CUBE_UV )\n\t\tvec4 envColor = textureCubeUV( envMap, reflectVec, 0.0 );\n\t#else\n\t\tvec4 envColor = vec4( 0.0 );\n\t#endif\n\t#ifndef ENVMAP_TYPE_CUBE_UV\n\t\tenvColor = envMapTexelToLinear( envColor );\n\t#endif\n\t#ifdef ENVMAP_BLENDING_MULTIPLY\n\t\toutgoingLight = mix( outgoingLight, outgoingLight * envColor.xyz, specularStrength * reflectivity );\n\t#elif defined( ENVMAP_BLENDING_MIX )\n\t\toutgoingLight = mix( outgoingLight, envColor.xyz, specularStrength * reflectivity );\n\t#elif defined( ENVMAP_BLENDING_ADD )\n\t\toutgoingLight += envColor.xyz * specularStrength * reflectivity;\n\t#endif\n#endif";

		var envmap_common_pars_fragment = "#ifdef USE_ENVMAP\n\tuniform float envMapIntensity;\n\tuniform float flipEnvMap;\n\tuniform int maxMipLevel;\n\t#ifdef ENVMAP_TYPE_CUBE\n\t\tuniform samplerCube envMap;\n\t#else\n\t\tuniform sampler2D envMap;\n\t#endif\n\t\n#endif";

		var envmap_pars_fragment = "#ifdef USE_ENVMAP\n\tuniform float reflectivity;\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )\n\t\t#define ENV_WORLDPOS\n\t#endif\n\t#ifdef ENV_WORLDPOS\n\t\tvarying vec3 vWorldPosition;\n\t\tuniform float refractionRatio;\n\t#else\n\t\tvarying vec3 vReflect;\n\t#endif\n#endif";

		var envmap_pars_vertex = "#ifdef USE_ENVMAP\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) ||defined( PHONG )\n\t\t#define ENV_WORLDPOS\n\t#endif\n\t#ifdef ENV_WORLDPOS\n\t\t\n\t\tvarying vec3 vWorldPosition;\n\t#else\n\t\tvarying vec3 vReflect;\n\t\tuniform float refractionRatio;\n\t#endif\n#endif";

		var envmap_vertex = "#ifdef USE_ENVMAP\n\t#ifdef ENV_WORLDPOS\n\t\tvWorldPosition = worldPosition.xyz;\n\t#else\n\t\tvec3 cameraToVertex;\n\t\tif ( isOrthographic ) {\n\t\t\tcameraToVertex = normalize( vec3( - viewMatrix[ 0 ][ 2 ], - viewMatrix[ 1 ][ 2 ], - viewMatrix[ 2 ][ 2 ] ) );\n\t\t} else {\n\t\t\tcameraToVertex = normalize( worldPosition.xyz - cameraPosition );\n\t\t}\n\t\tvec3 worldNormal = inverseTransformDirection( transformedNormal, viewMatrix );\n\t\t#ifdef ENVMAP_MODE_REFLECTION\n\t\t\tvReflect = reflect( cameraToVertex, worldNormal );\n\t\t#else\n\t\t\tvReflect = refract( cameraToVertex, worldNormal, refractionRatio );\n\t\t#endif\n\t#endif\n#endif";

		var fog_vertex = "#ifdef USE_FOG\n\tfogDepth = - mvPosition.z;\n#endif";

		var fog_pars_vertex = "#ifdef USE_FOG\n\tvarying float fogDepth;\n#endif";

		var fog_fragment = "#ifdef USE_FOG\n\t#ifdef FOG_EXP2\n\t\tfloat fogFactor = 1.0 - exp( - fogDensity * fogDensity * fogDepth * fogDepth );\n\t#else\n\t\tfloat fogFactor = smoothstep( fogNear, fogFar, fogDepth );\n\t#endif\n\tgl_FragColor.rgb = mix( gl_FragColor.rgb, fogColor, fogFactor );\n#endif";

		var fog_pars_fragment = "#ifdef USE_FOG\n\tuniform vec3 fogColor;\n\tvarying float fogDepth;\n\t#ifdef FOG_EXP2\n\t\tuniform float fogDensity;\n\t#else\n\t\tuniform float fogNear;\n\t\tuniform float fogFar;\n\t#endif\n#endif";

		var gradientmap_pars_fragment = "#ifdef USE_GRADIENTMAP\n\tuniform sampler2D gradientMap;\n#endif\nvec3 getGradientIrradiance( vec3 normal, vec3 lightDirection ) {\n\tfloat dotNL = dot( normal, lightDirection );\n\tvec2 coord = vec2( dotNL * 0.5 + 0.5, 0.0 );\n\t#ifdef USE_GRADIENTMAP\n\t\treturn texture2D( gradientMap, coord ).rgb;\n\t#else\n\t\treturn ( coord.x < 0.7 ) ? vec3( 0.7 ) : vec3( 1.0 );\n\t#endif\n}";

		var lightmap_fragment = "#ifdef USE_LIGHTMAP\n\tvec4 lightMapTexel= texture2D( lightMap, vUv2 );\n\treflectedLight.indirectDiffuse += PI * lightMapTexelToLinear( lightMapTexel ).rgb * lightMapIntensity;\n#endif";

		var lightmap_pars_fragment = "#ifdef USE_LIGHTMAP\n\tuniform sampler2D lightMap;\n\tuniform float lightMapIntensity;\n#endif";

		var lights_lambert_vertex = "vec3 diffuse = vec3( 1.0 );\nGeometricContext geometry;\ngeometry.position = mvPosition.xyz;\ngeometry.normal = normalize( transformedNormal );\ngeometry.viewDir = ( isOrthographic ) ? vec3( 0, 0, 1 ) : normalize( -mvPosition.xyz );\nGeometricContext backGeometry;\nbackGeometry.position = geometry.position;\nbackGeometry.normal = -geometry.normal;\nbackGeometry.viewDir = geometry.viewDir;\nvLightFront = vec3( 0.0 );\nvIndirectFront = vec3( 0.0 );\n#ifdef DOUBLE_SIDED\n\tvLightBack = vec3( 0.0 );\n\tvIndirectBack = vec3( 0.0 );\n#endif\nIncidentLight directLight;\nfloat dotNL;\nvec3 directLightColor_Diffuse;\nvIndirectFront += getAmbientLightIrradiance( ambientLightColor );\nvIndirectFront += getLightProbeIrradiance( lightProbe, geometry );\n#ifdef DOUBLE_SIDED\n\tvIndirectBack += getAmbientLightIrradiance( ambientLightColor );\n\tvIndirectBack += getLightProbeIrradiance( lightProbe, backGeometry );\n#endif\n#if NUM_POINT_LIGHTS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\n\t\tgetPointDirectLightIrradiance( pointLights[ i ], geometry, directLight );\n\t\tdotNL = dot( geometry.normal, directLight.direction );\n\t\tdirectLightColor_Diffuse = PI * directLight.color;\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\n\t\t#endif\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if NUM_SPOT_LIGHTS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\n\t\tgetSpotDirectLightIrradiance( spotLights[ i ], geometry, directLight );\n\t\tdotNL = dot( geometry.normal, directLight.direction );\n\t\tdirectLightColor_Diffuse = PI * directLight.color;\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\n\t\t#endif\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if NUM_DIR_LIGHTS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\n\t\tgetDirectionalDirectLightIrradiance( directionalLights[ i ], geometry, directLight );\n\t\tdotNL = dot( geometry.normal, directLight.direction );\n\t\tdirectLightColor_Diffuse = PI * directLight.color;\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\n\t\t#endif\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if NUM_HEMI_LIGHTS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\n\t\tvIndirectFront += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry );\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvIndirectBack += getHemisphereLightIrradiance( hemisphereLights[ i ], backGeometry );\n\t\t#endif\n\t}\n\t#pragma unroll_loop_end\n#endif";

		var lights_pars_begin = "uniform bool receiveShadow;\nuniform vec3 ambientLightColor;\nuniform vec3 lightProbe[ 9 ];\nvec3 shGetIrradianceAt( in vec3 normal, in vec3 shCoefficients[ 9 ] ) {\n\tfloat x = normal.x, y = normal.y, z = normal.z;\n\tvec3 result = shCoefficients[ 0 ] * 0.886227;\n\tresult += shCoefficients[ 1 ] * 2.0 * 0.511664 * y;\n\tresult += shCoefficients[ 2 ] * 2.0 * 0.511664 * z;\n\tresult += shCoefficients[ 3 ] * 2.0 * 0.511664 * x;\n\tresult += shCoefficients[ 4 ] * 2.0 * 0.429043 * x * y;\n\tresult += shCoefficients[ 5 ] * 2.0 * 0.429043 * y * z;\n\tresult += shCoefficients[ 6 ] * ( 0.743125 * z * z - 0.247708 );\n\tresult += shCoefficients[ 7 ] * 2.0 * 0.429043 * x * z;\n\tresult += shCoefficients[ 8 ] * 0.429043 * ( x * x - y * y );\n\treturn result;\n}\nvec3 getLightProbeIrradiance( const in vec3 lightProbe[ 9 ], const in GeometricContext geometry ) {\n\tvec3 worldNormal = inverseTransformDirection( geometry.normal, viewMatrix );\n\tvec3 irradiance = shGetIrradianceAt( worldNormal, lightProbe );\n\treturn irradiance;\n}\nvec3 getAmbientLightIrradiance( const in vec3 ambientLightColor ) {\n\tvec3 irradiance = ambientLightColor;\n\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\tirradiance *= PI;\n\t#endif\n\treturn irradiance;\n}\n#if NUM_DIR_LIGHTS > 0\n\tstruct DirectionalLight {\n\t\tvec3 direction;\n\t\tvec3 color;\n\t};\n\tuniform DirectionalLight directionalLights[ NUM_DIR_LIGHTS ];\n\tvoid getDirectionalDirectLightIrradiance( const in DirectionalLight directionalLight, const in GeometricContext geometry, out IncidentLight directLight ) {\n\t\tdirectLight.color = directionalLight.color;\n\t\tdirectLight.direction = directionalLight.direction;\n\t\tdirectLight.visible = true;\n\t}\n#endif\n#if NUM_POINT_LIGHTS > 0\n\tstruct PointLight {\n\t\tvec3 position;\n\t\tvec3 color;\n\t\tfloat distance;\n\t\tfloat decay;\n\t};\n\tuniform PointLight pointLights[ NUM_POINT_LIGHTS ];\n\tvoid getPointDirectLightIrradiance( const in PointLight pointLight, const in GeometricContext geometry, out IncidentLight directLight ) {\n\t\tvec3 lVector = pointLight.position - geometry.position;\n\t\tdirectLight.direction = normalize( lVector );\n\t\tfloat lightDistance = length( lVector );\n\t\tdirectLight.color = pointLight.color;\n\t\tdirectLight.color *= punctualLightIntensityToIrradianceFactor( lightDistance, pointLight.distance, pointLight.decay );\n\t\tdirectLight.visible = ( directLight.color != vec3( 0.0 ) );\n\t}\n#endif\n#if NUM_SPOT_LIGHTS > 0\n\tstruct SpotLight {\n\t\tvec3 position;\n\t\tvec3 direction;\n\t\tvec3 color;\n\t\tfloat distance;\n\t\tfloat decay;\n\t\tfloat coneCos;\n\t\tfloat penumbraCos;\n\t};\n\tuniform SpotLight spotLights[ NUM_SPOT_LIGHTS ];\n\tvoid getSpotDirectLightIrradiance( const in SpotLight spotLight, const in GeometricContext geometry, out IncidentLight directLight ) {\n\t\tvec3 lVector = spotLight.position - geometry.position;\n\t\tdirectLight.direction = normalize( lVector );\n\t\tfloat lightDistance = length( lVector );\n\t\tfloat angleCos = dot( directLight.direction, spotLight.direction );\n\t\tif ( angleCos > spotLight.coneCos ) {\n\t\t\tfloat spotEffect = smoothstep( spotLight.coneCos, spotLight.penumbraCos, angleCos );\n\t\t\tdirectLight.color = spotLight.color;\n\t\t\tdirectLight.color *= spotEffect * punctualLightIntensityToIrradianceFactor( lightDistance, spotLight.distance, spotLight.decay );\n\t\t\tdirectLight.visible = true;\n\t\t} else {\n\t\t\tdirectLight.color = vec3( 0.0 );\n\t\t\tdirectLight.visible = false;\n\t\t}\n\t}\n#endif\n#if NUM_RECT_AREA_LIGHTS > 0\n\tstruct RectAreaLight {\n\t\tvec3 color;\n\t\tvec3 position;\n\t\tvec3 halfWidth;\n\t\tvec3 halfHeight;\n\t};\n\tuniform sampler2D ltc_1;\tuniform sampler2D ltc_2;\n\tuniform RectAreaLight rectAreaLights[ NUM_RECT_AREA_LIGHTS ];\n#endif\n#if NUM_HEMI_LIGHTS > 0\n\tstruct HemisphereLight {\n\t\tvec3 direction;\n\t\tvec3 skyColor;\n\t\tvec3 groundColor;\n\t};\n\tuniform HemisphereLight hemisphereLights[ NUM_HEMI_LIGHTS ];\n\tvec3 getHemisphereLightIrradiance( const in HemisphereLight hemiLight, const in GeometricContext geometry ) {\n\t\tfloat dotNL = dot( geometry.normal, hemiLight.direction );\n\t\tfloat hemiDiffuseWeight = 0.5 * dotNL + 0.5;\n\t\tvec3 irradiance = mix( hemiLight.groundColor, hemiLight.skyColor, hemiDiffuseWeight );\n\t\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\t\tirradiance *= PI;\n\t\t#endif\n\t\treturn irradiance;\n\t}\n#endif";

		var envmap_physical_pars_fragment = "#if defined( USE_ENVMAP )\n\t#ifdef ENVMAP_MODE_REFRACTION\n\t\tuniform float refractionRatio;\n\t#endif\n\tvec3 getLightProbeIndirectIrradiance( const in GeometricContext geometry, const in int maxMIPLevel ) {\n\t\tvec3 worldNormal = inverseTransformDirection( geometry.normal, viewMatrix );\n\t\t#ifdef ENVMAP_TYPE_CUBE\n\t\t\tvec3 queryVec = vec3( flipEnvMap * worldNormal.x, worldNormal.yz );\n\t\t\t#ifdef TEXTURE_LOD_EXT\n\t\t\t\tvec4 envMapColor = textureCubeLodEXT( envMap, queryVec, float( maxMIPLevel ) );\n\t\t\t#else\n\t\t\t\tvec4 envMapColor = textureCube( envMap, queryVec, float( maxMIPLevel ) );\n\t\t\t#endif\n\t\t\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\n\t\t#elif defined( ENVMAP_TYPE_CUBE_UV )\n\t\t\tvec4 envMapColor = textureCubeUV( envMap, worldNormal, 1.0 );\n\t\t#else\n\t\t\tvec4 envMapColor = vec4( 0.0 );\n\t\t#endif\n\t\treturn PI * envMapColor.rgb * envMapIntensity;\n\t}\n\tfloat getSpecularMIPLevel( const in float roughness, const in int maxMIPLevel ) {\n\t\tfloat maxMIPLevelScalar = float( maxMIPLevel );\n\t\tfloat sigma = PI * roughness * roughness / ( 1.0 + roughness );\n\t\tfloat desiredMIPLevel = maxMIPLevelScalar + log2( sigma );\n\t\treturn clamp( desiredMIPLevel, 0.0, maxMIPLevelScalar );\n\t}\n\tvec3 getLightProbeIndirectRadiance( const in vec3 viewDir, const in vec3 normal, const in float roughness, const in int maxMIPLevel ) {\n\t\t#ifdef ENVMAP_MODE_REFLECTION\n\t\t\tvec3 reflectVec = reflect( -viewDir, normal );\n\t\t\treflectVec = normalize( mix( reflectVec, normal, roughness * roughness) );\n\t\t#else\n\t\t\tvec3 reflectVec = refract( -viewDir, normal, refractionRatio );\n\t\t#endif\n\t\treflectVec = inverseTransformDirection( reflectVec, viewMatrix );\n\t\tfloat specularMIPLevel = getSpecularMIPLevel( roughness, maxMIPLevel );\n\t\t#ifdef ENVMAP_TYPE_CUBE\n\t\t\tvec3 queryReflectVec = vec3( flipEnvMap * reflectVec.x, reflectVec.yz );\n\t\t\t#ifdef TEXTURE_LOD_EXT\n\t\t\t\tvec4 envMapColor = textureCubeLodEXT( envMap, queryReflectVec, specularMIPLevel );\n\t\t\t#else\n\t\t\t\tvec4 envMapColor = textureCube( envMap, queryReflectVec, specularMIPLevel );\n\t\t\t#endif\n\t\t\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\n\t\t#elif defined( ENVMAP_TYPE_CUBE_UV )\n\t\t\tvec4 envMapColor = textureCubeUV( envMap, reflectVec, roughness );\n\t\t#endif\n\t\treturn envMapColor.rgb * envMapIntensity;\n\t}\n#endif";

		var lights_toon_fragment = "ToonMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb;";

		var lights_toon_pars_fragment = "varying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\nstruct ToonMaterial {\n\tvec3 diffuseColor;\n};\nvoid RE_Direct_Toon( const in IncidentLight directLight, const in GeometricContext geometry, const in ToonMaterial material, inout ReflectedLight reflectedLight ) {\n\tvec3 irradiance = getGradientIrradiance( geometry.normal, directLight.direction ) * directLight.color;\n\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\tirradiance *= PI;\n\t#endif\n\treflectedLight.directDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectDiffuse_Toon( const in vec3 irradiance, const in GeometricContext geometry, const in ToonMaterial material, inout ReflectedLight reflectedLight ) {\n\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n}\n#define RE_Direct\t\t\t\tRE_Direct_Toon\n#define RE_IndirectDiffuse\t\tRE_IndirectDiffuse_Toon\n#define Material_LightProbeLOD( material )\t(0)";

		var lights_phong_fragment = "BlinnPhongMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb;\nmaterial.specularColor = specular;\nmaterial.specularShininess = shininess;\nmaterial.specularStrength = specularStrength;";

		var lights_phong_pars_fragment = "varying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\nstruct BlinnPhongMaterial {\n\tvec3 diffuseColor;\n\tvec3 specularColor;\n\tfloat specularShininess;\n\tfloat specularStrength;\n};\nvoid RE_Direct_BlinnPhong( const in IncidentLight directLight, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\n\tfloat dotNL = saturate( dot( geometry.normal, directLight.direction ) );\n\tvec3 irradiance = dotNL * directLight.color;\n\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\tirradiance *= PI;\n\t#endif\n\treflectedLight.directDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n\treflectedLight.directSpecular += irradiance * BRDF_Specular_BlinnPhong( directLight, geometry, material.specularColor, material.specularShininess ) * material.specularStrength;\n}\nvoid RE_IndirectDiffuse_BlinnPhong( const in vec3 irradiance, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\n\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n}\n#define RE_Direct\t\t\t\tRE_Direct_BlinnPhong\n#define RE_IndirectDiffuse\t\tRE_IndirectDiffuse_BlinnPhong\n#define Material_LightProbeLOD( material )\t(0)";

		var lights_physical_fragment = "PhysicalMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb * ( 1.0 - metalnessFactor );\nvec3 dxy = max( abs( dFdx( geometryNormal ) ), abs( dFdy( geometryNormal ) ) );\nfloat geometryRoughness = max( max( dxy.x, dxy.y ), dxy.z );\nmaterial.specularRoughness = max( roughnessFactor, 0.0525 );material.specularRoughness += geometryRoughness;\nmaterial.specularRoughness = min( material.specularRoughness, 1.0 );\n#ifdef REFLECTIVITY\n\tmaterial.specularColor = mix( vec3( MAXIMUM_SPECULAR_COEFFICIENT * pow2( reflectivity ) ), diffuseColor.rgb, metalnessFactor );\n#else\n\tmaterial.specularColor = mix( vec3( DEFAULT_SPECULAR_COEFFICIENT ), diffuseColor.rgb, metalnessFactor );\n#endif\n#ifdef CLEARCOAT\n\tmaterial.clearcoat = clearcoat;\n\tmaterial.clearcoatRoughness = clearcoatRoughness;\n\t#ifdef USE_CLEARCOATMAP\n\t\tmaterial.clearcoat *= texture2D( clearcoatMap, vUv ).x;\n\t#endif\n\t#ifdef USE_CLEARCOAT_ROUGHNESSMAP\n\t\tmaterial.clearcoatRoughness *= texture2D( clearcoatRoughnessMap, vUv ).y;\n\t#endif\n\tmaterial.clearcoat = saturate( material.clearcoat );\tmaterial.clearcoatRoughness = max( material.clearcoatRoughness, 0.0525 );\n\tmaterial.clearcoatRoughness += geometryRoughness;\n\tmaterial.clearcoatRoughness = min( material.clearcoatRoughness, 1.0 );\n#endif\n#ifdef USE_SHEEN\n\tmaterial.sheenColor = sheen;\n#endif";

		var lights_physical_pars_fragment = "struct PhysicalMaterial {\n\tvec3 diffuseColor;\n\tfloat specularRoughness;\n\tvec3 specularColor;\n#ifdef CLEARCOAT\n\tfloat clearcoat;\n\tfloat clearcoatRoughness;\n#endif\n#ifdef USE_SHEEN\n\tvec3 sheenColor;\n#endif\n};\n#define MAXIMUM_SPECULAR_COEFFICIENT 0.16\n#define DEFAULT_SPECULAR_COEFFICIENT 0.04\nfloat clearcoatDHRApprox( const in float roughness, const in float dotNL ) {\n\treturn DEFAULT_SPECULAR_COEFFICIENT + ( 1.0 - DEFAULT_SPECULAR_COEFFICIENT ) * ( pow( 1.0 - dotNL, 5.0 ) * pow( 1.0 - roughness, 2.0 ) );\n}\n#if NUM_RECT_AREA_LIGHTS > 0\n\tvoid RE_Direct_RectArea_Physical( const in RectAreaLight rectAreaLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n\t\tvec3 normal = geometry.normal;\n\t\tvec3 viewDir = geometry.viewDir;\n\t\tvec3 position = geometry.position;\n\t\tvec3 lightPos = rectAreaLight.position;\n\t\tvec3 halfWidth = rectAreaLight.halfWidth;\n\t\tvec3 halfHeight = rectAreaLight.halfHeight;\n\t\tvec3 lightColor = rectAreaLight.color;\n\t\tfloat roughness = material.specularRoughness;\n\t\tvec3 rectCoords[ 4 ];\n\t\trectCoords[ 0 ] = lightPos + halfWidth - halfHeight;\t\trectCoords[ 1 ] = lightPos - halfWidth - halfHeight;\n\t\trectCoords[ 2 ] = lightPos - halfWidth + halfHeight;\n\t\trectCoords[ 3 ] = lightPos + halfWidth + halfHeight;\n\t\tvec2 uv = LTC_Uv( normal, viewDir, roughness );\n\t\tvec4 t1 = texture2D( ltc_1, uv );\n\t\tvec4 t2 = texture2D( ltc_2, uv );\n\t\tmat3 mInv = mat3(\n\t\t\tvec3( t1.x, 0, t1.y ),\n\t\t\tvec3(    0, 1,    0 ),\n\t\t\tvec3( t1.z, 0, t1.w )\n\t\t);\n\t\tvec3 fresnel = ( material.specularColor * t2.x + ( vec3( 1.0 ) - material.specularColor ) * t2.y );\n\t\treflectedLight.directSpecular += lightColor * fresnel * LTC_Evaluate( normal, viewDir, position, mInv, rectCoords );\n\t\treflectedLight.directDiffuse += lightColor * material.diffuseColor * LTC_Evaluate( normal, viewDir, position, mat3( 1.0 ), rectCoords );\n\t}\n#endif\nvoid RE_Direct_Physical( const in IncidentLight directLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n\tfloat dotNL = saturate( dot( geometry.normal, directLight.direction ) );\n\tvec3 irradiance = dotNL * directLight.color;\n\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\tirradiance *= PI;\n\t#endif\n\t#ifdef CLEARCOAT\n\t\tfloat ccDotNL = saturate( dot( geometry.clearcoatNormal, directLight.direction ) );\n\t\tvec3 ccIrradiance = ccDotNL * directLight.color;\n\t\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\t\tccIrradiance *= PI;\n\t\t#endif\n\t\tfloat clearcoatDHR = material.clearcoat * clearcoatDHRApprox( material.clearcoatRoughness, ccDotNL );\n\t\treflectedLight.directSpecular += ccIrradiance * material.clearcoat * BRDF_Specular_GGX( directLight, geometry.viewDir, geometry.clearcoatNormal, vec3( DEFAULT_SPECULAR_COEFFICIENT ), material.clearcoatRoughness );\n\t#else\n\t\tfloat clearcoatDHR = 0.0;\n\t#endif\n\t#ifdef USE_SHEEN\n\t\treflectedLight.directSpecular += ( 1.0 - clearcoatDHR ) * irradiance * BRDF_Specular_Sheen(\n\t\t\tmaterial.specularRoughness,\n\t\t\tdirectLight.direction,\n\t\t\tgeometry,\n\t\t\tmaterial.sheenColor\n\t\t);\n\t#else\n\t\treflectedLight.directSpecular += ( 1.0 - clearcoatDHR ) * irradiance * BRDF_Specular_GGX( directLight, geometry.viewDir, geometry.normal, material.specularColor, material.specularRoughness);\n\t#endif\n\treflectedLight.directDiffuse += ( 1.0 - clearcoatDHR ) * irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectDiffuse_Physical( const in vec3 irradiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectSpecular_Physical( const in vec3 radiance, const in vec3 irradiance, const in vec3 clearcoatRadiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight) {\n\t#ifdef CLEARCOAT\n\t\tfloat ccDotNV = saturate( dot( geometry.clearcoatNormal, geometry.viewDir ) );\n\t\treflectedLight.indirectSpecular += clearcoatRadiance * material.clearcoat * BRDF_Specular_GGX_Environment( geometry.viewDir, geometry.clearcoatNormal, vec3( DEFAULT_SPECULAR_COEFFICIENT ), material.clearcoatRoughness );\n\t\tfloat ccDotNL = ccDotNV;\n\t\tfloat clearcoatDHR = material.clearcoat * clearcoatDHRApprox( material.clearcoatRoughness, ccDotNL );\n\t#else\n\t\tfloat clearcoatDHR = 0.0;\n\t#endif\n\tfloat clearcoatInv = 1.0 - clearcoatDHR;\n\tvec3 singleScattering = vec3( 0.0 );\n\tvec3 multiScattering = vec3( 0.0 );\n\tvec3 cosineWeightedIrradiance = irradiance * RECIPROCAL_PI;\n\tBRDF_Specular_Multiscattering_Environment( geometry, material.specularColor, material.specularRoughness, singleScattering, multiScattering );\n\tvec3 diffuse = material.diffuseColor * ( 1.0 - ( singleScattering + multiScattering ) );\n\treflectedLight.indirectSpecular += clearcoatInv * radiance * singleScattering;\n\treflectedLight.indirectSpecular += multiScattering * cosineWeightedIrradiance;\n\treflectedLight.indirectDiffuse += diffuse * cosineWeightedIrradiance;\n}\n#define RE_Direct\t\t\t\tRE_Direct_Physical\n#define RE_Direct_RectArea\t\tRE_Direct_RectArea_Physical\n#define RE_IndirectDiffuse\t\tRE_IndirectDiffuse_Physical\n#define RE_IndirectSpecular\t\tRE_IndirectSpecular_Physical\nfloat computeSpecularOcclusion( const in float dotNV, const in float ambientOcclusion, const in float roughness ) {\n\treturn saturate( pow( dotNV + ambientOcclusion, exp2( - 16.0 * roughness - 1.0 ) ) - 1.0 + ambientOcclusion );\n}";

		var lights_fragment_begin = "\nGeometricContext geometry;\ngeometry.position = - vViewPosition;\ngeometry.normal = normal;\ngeometry.viewDir = ( isOrthographic ) ? vec3( 0, 0, 1 ) : normalize( vViewPosition );\n#ifdef CLEARCOAT\n\tgeometry.clearcoatNormal = clearcoatNormal;\n#endif\nIncidentLight directLight;\n#if ( NUM_POINT_LIGHTS > 0 ) && defined( RE_Direct )\n\tPointLight pointLight;\n\t#if defined( USE_SHADOWMAP ) && NUM_POINT_LIGHT_SHADOWS > 0\n\tPointLightShadow pointLightShadow;\n\t#endif\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\n\t\tpointLight = pointLights[ i ];\n\t\tgetPointDirectLightIrradiance( pointLight, geometry, directLight );\n\t\t#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_POINT_LIGHT_SHADOWS )\n\t\tpointLightShadow = pointLightShadows[ i ];\n\t\tdirectLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getPointShadow( pointShadowMap[ i ], pointLightShadow.shadowMapSize, pointLightShadow.shadowBias, pointLightShadow.shadowRadius, vPointShadowCoord[ i ], pointLightShadow.shadowCameraNear, pointLightShadow.shadowCameraFar ) : 1.0;\n\t\t#endif\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if ( NUM_SPOT_LIGHTS > 0 ) && defined( RE_Direct )\n\tSpotLight spotLight;\n\t#if defined( USE_SHADOWMAP ) && NUM_SPOT_LIGHT_SHADOWS > 0\n\tSpotLightShadow spotLightShadow;\n\t#endif\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\n\t\tspotLight = spotLights[ i ];\n\t\tgetSpotDirectLightIrradiance( spotLight, geometry, directLight );\n\t\t#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_SPOT_LIGHT_SHADOWS )\n\t\tspotLightShadow = spotLightShadows[ i ];\n\t\tdirectLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getShadow( spotShadowMap[ i ], spotLightShadow.shadowMapSize, spotLightShadow.shadowBias, spotLightShadow.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\n\t\t#endif\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if ( NUM_DIR_LIGHTS > 0 ) && defined( RE_Direct )\n\tDirectionalLight directionalLight;\n\t#if defined( USE_SHADOWMAP ) && NUM_DIR_LIGHT_SHADOWS > 0\n\tDirectionalLightShadow directionalLightShadow;\n\t#endif\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\n\t\tdirectionalLight = directionalLights[ i ];\n\t\tgetDirectionalDirectLightIrradiance( directionalLight, geometry, directLight );\n\t\t#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_DIR_LIGHT_SHADOWS )\n\t\tdirectionalLightShadow = directionalLightShadows[ i ];\n\t\tdirectLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getShadow( directionalShadowMap[ i ], directionalLightShadow.shadowMapSize, directionalLightShadow.shadowBias, directionalLightShadow.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\n\t\t#endif\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if ( NUM_RECT_AREA_LIGHTS > 0 ) && defined( RE_Direct_RectArea )\n\tRectAreaLight rectAreaLight;\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_RECT_AREA_LIGHTS; i ++ ) {\n\t\trectAreaLight = rectAreaLights[ i ];\n\t\tRE_Direct_RectArea( rectAreaLight, geometry, material, reflectedLight );\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if defined( RE_IndirectDiffuse )\n\tvec3 iblIrradiance = vec3( 0.0 );\n\tvec3 irradiance = getAmbientLightIrradiance( ambientLightColor );\n\tirradiance += getLightProbeIrradiance( lightProbe, geometry );\n\t#if ( NUM_HEMI_LIGHTS > 0 )\n\t\t#pragma unroll_loop_start\n\t\tfor ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\n\t\t\tirradiance += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry );\n\t\t}\n\t\t#pragma unroll_loop_end\n\t#endif\n#endif\n#if defined( RE_IndirectSpecular )\n\tvec3 radiance = vec3( 0.0 );\n\tvec3 clearcoatRadiance = vec3( 0.0 );\n#endif";

		var lights_fragment_maps = "#if defined( RE_IndirectDiffuse )\n\t#ifdef USE_LIGHTMAP\n\t\tvec4 lightMapTexel= texture2D( lightMap, vUv2 );\n\t\tvec3 lightMapIrradiance = lightMapTexelToLinear( lightMapTexel ).rgb * lightMapIntensity;\n\t\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\t\tlightMapIrradiance *= PI;\n\t\t#endif\n\t\tirradiance += lightMapIrradiance;\n\t#endif\n\t#if defined( USE_ENVMAP ) && defined( STANDARD ) && defined( ENVMAP_TYPE_CUBE_UV )\n\t\tiblIrradiance += getLightProbeIndirectIrradiance( geometry, maxMipLevel );\n\t#endif\n#endif\n#if defined( USE_ENVMAP ) && defined( RE_IndirectSpecular )\n\tradiance += getLightProbeIndirectRadiance( geometry.viewDir, geometry.normal, material.specularRoughness, maxMipLevel );\n\t#ifdef CLEARCOAT\n\t\tclearcoatRadiance += getLightProbeIndirectRadiance( geometry.viewDir, geometry.clearcoatNormal, material.clearcoatRoughness, maxMipLevel );\n\t#endif\n#endif";

		var lights_fragment_end = "#if defined( RE_IndirectDiffuse )\n\tRE_IndirectDiffuse( irradiance, geometry, material, reflectedLight );\n#endif\n#if defined( RE_IndirectSpecular )\n\tRE_IndirectSpecular( radiance, iblIrradiance, clearcoatRadiance, geometry, material, reflectedLight );\n#endif";

		var logdepthbuf_fragment = "#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )\n\tgl_FragDepthEXT = vIsPerspective == 0.0 ? gl_FragCoord.z : log2( vFragDepth ) * logDepthBufFC * 0.5;\n#endif";

		var logdepthbuf_pars_fragment = "#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )\n\tuniform float logDepthBufFC;\n\tvarying float vFragDepth;\n\tvarying float vIsPerspective;\n#endif";

		var logdepthbuf_pars_vertex = "#ifdef USE_LOGDEPTHBUF\n\t#ifdef USE_LOGDEPTHBUF_EXT\n\t\tvarying float vFragDepth;\n\t\tvarying float vIsPerspective;\n\t#else\n\t\tuniform float logDepthBufFC;\n\t#endif\n#endif";

		var logdepthbuf_vertex = "#ifdef USE_LOGDEPTHBUF\n\t#ifdef USE_LOGDEPTHBUF_EXT\n\t\tvFragDepth = 1.0 + gl_Position.w;\n\t\tvIsPerspective = float( isPerspectiveMatrix( projectionMatrix ) );\n\t#else\n\t\tif ( isPerspectiveMatrix( projectionMatrix ) ) {\n\t\t\tgl_Position.z = log2( max( EPSILON, gl_Position.w + 1.0 ) ) * logDepthBufFC - 1.0;\n\t\t\tgl_Position.z *= gl_Position.w;\n\t\t}\n\t#endif\n#endif";

		var map_fragment = "#ifdef USE_MAP\n\tvec4 texelColor = texture2D( map, vUv );\n\ttexelColor = mapTexelToLinear( texelColor );\n\tdiffuseColor *= texelColor;\n#endif";

		var map_pars_fragment = "#ifdef USE_MAP\n\tuniform sampler2D map;\n#endif";

		var map_particle_fragment = "#if defined( USE_MAP ) || defined( USE_ALPHAMAP )\n\tvec2 uv = ( uvTransform * vec3( gl_PointCoord.x, 1.0 - gl_PointCoord.y, 1 ) ).xy;\n#endif\n#ifdef USE_MAP\n\tvec4 mapTexel = texture2D( map, uv );\n\tdiffuseColor *= mapTexelToLinear( mapTexel );\n#endif\n#ifdef USE_ALPHAMAP\n\tdiffuseColor.a *= texture2D( alphaMap, uv ).g;\n#endif";

		var map_particle_pars_fragment = "#if defined( USE_MAP ) || defined( USE_ALPHAMAP )\n\tuniform mat3 uvTransform;\n#endif\n#ifdef USE_MAP\n\tuniform sampler2D map;\n#endif\n#ifdef USE_ALPHAMAP\n\tuniform sampler2D alphaMap;\n#endif";

		var metalnessmap_fragment = "float metalnessFactor = metalness;\n#ifdef USE_METALNESSMAP\n\tvec4 texelMetalness = texture2D( metalnessMap, vUv );\n\tmetalnessFactor *= texelMetalness.b;\n#endif";

		var metalnessmap_pars_fragment = "#ifdef USE_METALNESSMAP\n\tuniform sampler2D metalnessMap;\n#endif";

		var morphnormal_vertex = "#ifdef USE_MORPHNORMALS\n\tobjectNormal *= morphTargetBaseInfluence;\n\tobjectNormal += morphNormal0 * morphTargetInfluences[ 0 ];\n\tobjectNormal += morphNormal1 * morphTargetInfluences[ 1 ];\n\tobjectNormal += morphNormal2 * morphTargetInfluences[ 2 ];\n\tobjectNormal += morphNormal3 * morphTargetInfluences[ 3 ];\n#endif";

		var morphtarget_pars_vertex = "#ifdef USE_MORPHTARGETS\n\tuniform float morphTargetBaseInfluence;\n\t#ifndef USE_MORPHNORMALS\n\t\tuniform float morphTargetInfluences[ 8 ];\n\t#else\n\t\tuniform float morphTargetInfluences[ 4 ];\n\t#endif\n#endif";

		var morphtarget_vertex = "#ifdef USE_MORPHTARGETS\n\ttransformed *= morphTargetBaseInfluence;\n\ttransformed += morphTarget0 * morphTargetInfluences[ 0 ];\n\ttransformed += morphTarget1 * morphTargetInfluences[ 1 ];\n\ttransformed += morphTarget2 * morphTargetInfluences[ 2 ];\n\ttransformed += morphTarget3 * morphTargetInfluences[ 3 ];\n\t#ifndef USE_MORPHNORMALS\n\t\ttransformed += morphTarget4 * morphTargetInfluences[ 4 ];\n\t\ttransformed += morphTarget5 * morphTargetInfluences[ 5 ];\n\t\ttransformed += morphTarget6 * morphTargetInfluences[ 6 ];\n\t\ttransformed += morphTarget7 * morphTargetInfluences[ 7 ];\n\t#endif\n#endif";

		var normal_fragment_begin = "#ifdef FLAT_SHADED\n\tvec3 fdx = vec3( dFdx( vViewPosition.x ), dFdx( vViewPosition.y ), dFdx( vViewPosition.z ) );\n\tvec3 fdy = vec3( dFdy( vViewPosition.x ), dFdy( vViewPosition.y ), dFdy( vViewPosition.z ) );\n\tvec3 normal = normalize( cross( fdx, fdy ) );\n#else\n\tvec3 normal = normalize( vNormal );\n\t#ifdef DOUBLE_SIDED\n\t\tnormal = normal * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\n\t#endif\n\t#ifdef USE_TANGENT\n\t\tvec3 tangent = normalize( vTangent );\n\t\tvec3 bitangent = normalize( vBitangent );\n\t\t#ifdef DOUBLE_SIDED\n\t\t\ttangent = tangent * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\n\t\t\tbitangent = bitangent * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\n\t\t#endif\n\t\t#if defined( TANGENTSPACE_NORMALMAP ) || defined( USE_CLEARCOAT_NORMALMAP )\n\t\t\tmat3 vTBN = mat3( tangent, bitangent, normal );\n\t\t#endif\n\t#endif\n#endif\nvec3 geometryNormal = normal;";

		var normal_fragment_maps = "#ifdef OBJECTSPACE_NORMALMAP\n\tnormal = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;\n\t#ifdef FLIP_SIDED\n\t\tnormal = - normal;\n\t#endif\n\t#ifdef DOUBLE_SIDED\n\t\tnormal = normal * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\n\t#endif\n\tnormal = normalize( normalMatrix * normal );\n#elif defined( TANGENTSPACE_NORMALMAP )\n\tvec3 mapN = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;\n\tmapN.xy *= normalScale;\n\t#ifdef USE_TANGENT\n\t\tnormal = normalize( vTBN * mapN );\n\t#else\n\t\tnormal = perturbNormal2Arb( -vViewPosition, normal, mapN );\n\t#endif\n#elif defined( USE_BUMPMAP )\n\tnormal = perturbNormalArb( -vViewPosition, normal, dHdxy_fwd() );\n#endif";

		var normalmap_pars_fragment = "#ifdef USE_NORMALMAP\n\tuniform sampler2D normalMap;\n\tuniform vec2 normalScale;\n#endif\n#ifdef OBJECTSPACE_NORMALMAP\n\tuniform mat3 normalMatrix;\n#endif\n#if ! defined ( USE_TANGENT ) && ( defined ( TANGENTSPACE_NORMALMAP ) || defined ( USE_CLEARCOAT_NORMALMAP ) )\n\tvec3 perturbNormal2Arb( vec3 eye_pos, vec3 surf_norm, vec3 mapN ) {\n\t\tvec3 q0 = vec3( dFdx( eye_pos.x ), dFdx( eye_pos.y ), dFdx( eye_pos.z ) );\n\t\tvec3 q1 = vec3( dFdy( eye_pos.x ), dFdy( eye_pos.y ), dFdy( eye_pos.z ) );\n\t\tvec2 st0 = dFdx( vUv.st );\n\t\tvec2 st1 = dFdy( vUv.st );\n\t\tfloat scale = sign( st1.t * st0.s - st0.t * st1.s );\n\t\tvec3 S = normalize( ( q0 * st1.t - q1 * st0.t ) * scale );\n\t\tvec3 T = normalize( ( - q0 * st1.s + q1 * st0.s ) * scale );\n\t\tvec3 N = normalize( surf_norm );\n\t\tmat3 tsn = mat3( S, T, N );\n\t\tmapN.xy *= ( float( gl_FrontFacing ) * 2.0 - 1.0 );\n\t\treturn normalize( tsn * mapN );\n\t}\n#endif";

		var clearcoat_normal_fragment_begin = "#ifdef CLEARCOAT\n\tvec3 clearcoatNormal = geometryNormal;\n#endif";

		var clearcoat_normal_fragment_maps = "#ifdef USE_CLEARCOAT_NORMALMAP\n\tvec3 clearcoatMapN = texture2D( clearcoatNormalMap, vUv ).xyz * 2.0 - 1.0;\n\tclearcoatMapN.xy *= clearcoatNormalScale;\n\t#ifdef USE_TANGENT\n\t\tclearcoatNormal = normalize( vTBN * clearcoatMapN );\n\t#else\n\t\tclearcoatNormal = perturbNormal2Arb( - vViewPosition, clearcoatNormal, clearcoatMapN );\n\t#endif\n#endif";

		var clearcoat_pars_fragment = "#ifdef USE_CLEARCOATMAP\n\tuniform sampler2D clearcoatMap;\n#endif\n#ifdef USE_CLEARCOAT_ROUGHNESSMAP\n\tuniform sampler2D clearcoatRoughnessMap;\n#endif\n#ifdef USE_CLEARCOAT_NORMALMAP\n\tuniform sampler2D clearcoatNormalMap;\n\tuniform vec2 clearcoatNormalScale;\n#endif";

		var packing = "vec3 packNormalToRGB( const in vec3 normal ) {\n\treturn normalize( normal ) * 0.5 + 0.5;\n}\nvec3 unpackRGBToNormal( const in vec3 rgb ) {\n\treturn 2.0 * rgb.xyz - 1.0;\n}\nconst float PackUpscale = 256. / 255.;const float UnpackDownscale = 255. / 256.;\nconst vec3 PackFactors = vec3( 256. * 256. * 256., 256. * 256., 256. );\nconst vec4 UnpackFactors = UnpackDownscale / vec4( PackFactors, 1. );\nconst float ShiftRight8 = 1. / 256.;\nvec4 packDepthToRGBA( const in float v ) {\n\tvec4 r = vec4( fract( v * PackFactors ), v );\n\tr.yzw -= r.xyz * ShiftRight8;\treturn r * PackUpscale;\n}\nfloat unpackRGBAToDepth( const in vec4 v ) {\n\treturn dot( v, UnpackFactors );\n}\nvec4 pack2HalfToRGBA( vec2 v ) {\n\tvec4 r = vec4( v.x, fract( v.x * 255.0 ), v.y, fract( v.y * 255.0 ));\n\treturn vec4( r.x - r.y / 255.0, r.y, r.z - r.w / 255.0, r.w);\n}\nvec2 unpackRGBATo2Half( vec4 v ) {\n\treturn vec2( v.x + ( v.y / 255.0 ), v.z + ( v.w / 255.0 ) );\n}\nfloat viewZToOrthographicDepth( const in float viewZ, const in float near, const in float far ) {\n\treturn ( viewZ + near ) / ( near - far );\n}\nfloat orthographicDepthToViewZ( const in float linearClipZ, const in float near, const in float far ) {\n\treturn linearClipZ * ( near - far ) - near;\n}\nfloat viewZToPerspectiveDepth( const in float viewZ, const in float near, const in float far ) {\n\treturn (( near + viewZ ) * far ) / (( far - near ) * viewZ );\n}\nfloat perspectiveDepthToViewZ( const in float invClipZ, const in float near, const in float far ) {\n\treturn ( near * far ) / ( ( far - near ) * invClipZ - far );\n}";

		var premultiplied_alpha_fragment = "#ifdef PREMULTIPLIED_ALPHA\n\tgl_FragColor.rgb *= gl_FragColor.a;\n#endif";

		var project_vertex = "vec4 mvPosition = vec4( transformed, 1.0 );\n#ifdef USE_INSTANCING\n\tmvPosition = instanceMatrix * mvPosition;\n#endif\nmvPosition = modelViewMatrix * mvPosition;\ngl_Position = projectionMatrix * mvPosition;";

		var dithering_fragment = "#ifdef DITHERING\n\tgl_FragColor.rgb = dithering( gl_FragColor.rgb );\n#endif";

		var dithering_pars_fragment = "#ifdef DITHERING\n\tvec3 dithering( vec3 color ) {\n\t\tfloat grid_position = rand( gl_FragCoord.xy );\n\t\tvec3 dither_shift_RGB = vec3( 0.25 / 255.0, -0.25 / 255.0, 0.25 / 255.0 );\n\t\tdither_shift_RGB = mix( 2.0 * dither_shift_RGB, -2.0 * dither_shift_RGB, grid_position );\n\t\treturn color + dither_shift_RGB;\n\t}\n#endif";

		var roughnessmap_fragment = "float roughnessFactor = roughness;\n#ifdef USE_ROUGHNESSMAP\n\tvec4 texelRoughness = texture2D( roughnessMap, vUv );\n\troughnessFactor *= texelRoughness.g;\n#endif";

		var roughnessmap_pars_fragment = "#ifdef USE_ROUGHNESSMAP\n\tuniform sampler2D roughnessMap;\n#endif";

		var shadowmap_pars_fragment = "#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHT_SHADOWS > 0\n\t\tuniform sampler2D directionalShadowMap[ NUM_DIR_LIGHT_SHADOWS ];\n\t\tvarying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHT_SHADOWS ];\n\t\tstruct DirectionalLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t};\n\t\tuniform DirectionalLightShadow directionalLightShadows[ NUM_DIR_LIGHT_SHADOWS ];\n\t#endif\n\t#if NUM_SPOT_LIGHT_SHADOWS > 0\n\t\tuniform sampler2D spotShadowMap[ NUM_SPOT_LIGHT_SHADOWS ];\n\t\tvarying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHT_SHADOWS ];\n\t\tstruct SpotLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t};\n\t\tuniform SpotLightShadow spotLightShadows[ NUM_SPOT_LIGHT_SHADOWS ];\n\t#endif\n\t#if NUM_POINT_LIGHT_SHADOWS > 0\n\t\tuniform sampler2D pointShadowMap[ NUM_POINT_LIGHT_SHADOWS ];\n\t\tvarying vec4 vPointShadowCoord[ NUM_POINT_LIGHT_SHADOWS ];\n\t\tstruct PointLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t\tfloat shadowCameraNear;\n\t\t\tfloat shadowCameraFar;\n\t\t};\n\t\tuniform PointLightShadow pointLightShadows[ NUM_POINT_LIGHT_SHADOWS ];\n\t#endif\n\tfloat texture2DCompare( sampler2D depths, vec2 uv, float compare ) {\n\t\treturn step( compare, unpackRGBAToDepth( texture2D( depths, uv ) ) );\n\t}\n\tvec2 texture2DDistribution( sampler2D shadow, vec2 uv ) {\n\t\treturn unpackRGBATo2Half( texture2D( shadow, uv ) );\n\t}\n\tfloat VSMShadow (sampler2D shadow, vec2 uv, float compare ){\n\t\tfloat occlusion = 1.0;\n\t\tvec2 distribution = texture2DDistribution( shadow, uv );\n\t\tfloat hard_shadow = step( compare , distribution.x );\n\t\tif (hard_shadow != 1.0 ) {\n\t\t\tfloat distance = compare - distribution.x ;\n\t\t\tfloat variance = max( 0.00000, distribution.y * distribution.y );\n\t\t\tfloat softness_probability = variance / (variance + distance * distance );\t\t\tsoftness_probability = clamp( ( softness_probability - 0.3 ) / ( 0.95 - 0.3 ), 0.0, 1.0 );\t\t\tocclusion = clamp( max( hard_shadow, softness_probability ), 0.0, 1.0 );\n\t\t}\n\t\treturn occlusion;\n\t}\n\tfloat getShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord ) {\n\t\tfloat shadow = 1.0;\n\t\tshadowCoord.xyz /= shadowCoord.w;\n\t\tshadowCoord.z += shadowBias;\n\t\tbvec4 inFrustumVec = bvec4 ( shadowCoord.x >= 0.0, shadowCoord.x <= 1.0, shadowCoord.y >= 0.0, shadowCoord.y <= 1.0 );\n\t\tbool inFrustum = all( inFrustumVec );\n\t\tbvec2 frustumTestVec = bvec2( inFrustum, shadowCoord.z <= 1.0 );\n\t\tbool frustumTest = all( frustumTestVec );\n\t\tif ( frustumTest ) {\n\t\t#if defined( SHADOWMAP_TYPE_PCF )\n\t\t\tvec2 texelSize = vec2( 1.0 ) / shadowMapSize;\n\t\t\tfloat dx0 = - texelSize.x * shadowRadius;\n\t\t\tfloat dy0 = - texelSize.y * shadowRadius;\n\t\t\tfloat dx1 = + texelSize.x * shadowRadius;\n\t\t\tfloat dy1 = + texelSize.y * shadowRadius;\n\t\t\tfloat dx2 = dx0 / 2.0;\n\t\t\tfloat dy2 = dy0 / 2.0;\n\t\t\tfloat dx3 = dx1 / 2.0;\n\t\t\tfloat dy3 = dy1 / 2.0;\n\t\t\tshadow = (\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, dy2 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy2 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, dy2 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, dy3 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy3 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, dy3 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )\n\t\t\t) * ( 1.0 / 17.0 );\n\t\t#elif defined( SHADOWMAP_TYPE_PCF_SOFT )\n\t\t\tvec2 texelSize = vec2( 1.0 ) / shadowMapSize;\n\t\t\tfloat dx = texelSize.x;\n\t\t\tfloat dy = texelSize.y;\n\t\t\tvec2 uv = shadowCoord.xy;\n\t\t\tvec2 f = fract( uv * shadowMapSize + 0.5 );\n\t\t\tuv -= f * texelSize;\n\t\t\tshadow = (\n\t\t\t\ttexture2DCompare( shadowMap, uv, shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, uv + vec2( dx, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, uv + vec2( 0.0, dy ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, uv + texelSize, shadowCoord.z ) +\n\t\t\t\tmix( texture2DCompare( shadowMap, uv + vec2( -dx, 0.0 ), shadowCoord.z ), \n\t\t\t\t\t texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, 0.0 ), shadowCoord.z ),\n\t\t\t\t\t f.x ) +\n\t\t\t\tmix( texture2DCompare( shadowMap, uv + vec2( -dx, dy ), shadowCoord.z ), \n\t\t\t\t\t texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, dy ), shadowCoord.z ),\n\t\t\t\t\t f.x ) +\n\t\t\t\tmix( texture2DCompare( shadowMap, uv + vec2( 0.0, -dy ), shadowCoord.z ), \n\t\t\t\t\t texture2DCompare( shadowMap, uv + vec2( 0.0, 2.0 * dy ), shadowCoord.z ),\n\t\t\t\t\t f.y ) +\n\t\t\t\tmix( texture2DCompare( shadowMap, uv + vec2( dx, -dy ), shadowCoord.z ), \n\t\t\t\t\t texture2DCompare( shadowMap, uv + vec2( dx, 2.0 * dy ), shadowCoord.z ),\n\t\t\t\t\t f.y ) +\n\t\t\t\tmix( mix( texture2DCompare( shadowMap, uv + vec2( -dx, -dy ), shadowCoord.z ), \n\t\t\t\t\t\t  texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, -dy ), shadowCoord.z ),\n\t\t\t\t\t\t  f.x ),\n\t\t\t\t\t mix( texture2DCompare( shadowMap, uv + vec2( -dx, 2.0 * dy ), shadowCoord.z ), \n\t\t\t\t\t\t  texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, 2.0 * dy ), shadowCoord.z ),\n\t\t\t\t\t\t  f.x ),\n\t\t\t\t\t f.y )\n\t\t\t) * ( 1.0 / 9.0 );\n\t\t#elif defined( SHADOWMAP_TYPE_VSM )\n\t\t\tshadow = VSMShadow( shadowMap, shadowCoord.xy, shadowCoord.z );\n\t\t#else\n\t\t\tshadow = texture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z );\n\t\t#endif\n\t\t}\n\t\treturn shadow;\n\t}\n\tvec2 cubeToUV( vec3 v, float texelSizeY ) {\n\t\tvec3 absV = abs( v );\n\t\tfloat scaleToCube = 1.0 / max( absV.x, max( absV.y, absV.z ) );\n\t\tabsV *= scaleToCube;\n\t\tv *= scaleToCube * ( 1.0 - 2.0 * texelSizeY );\n\t\tvec2 planar = v.xy;\n\t\tfloat almostATexel = 1.5 * texelSizeY;\n\t\tfloat almostOne = 1.0 - almostATexel;\n\t\tif ( absV.z >= almostOne ) {\n\t\t\tif ( v.z > 0.0 )\n\t\t\t\tplanar.x = 4.0 - v.x;\n\t\t} else if ( absV.x >= almostOne ) {\n\t\t\tfloat signX = sign( v.x );\n\t\t\tplanar.x = v.z * signX + 2.0 * signX;\n\t\t} else if ( absV.y >= almostOne ) {\n\t\t\tfloat signY = sign( v.y );\n\t\t\tplanar.x = v.x + 2.0 * signY + 2.0;\n\t\t\tplanar.y = v.z * signY - 2.0;\n\t\t}\n\t\treturn vec2( 0.125, 0.25 ) * planar + vec2( 0.375, 0.75 );\n\t}\n\tfloat getPointShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord, float shadowCameraNear, float shadowCameraFar ) {\n\t\tvec2 texelSize = vec2( 1.0 ) / ( shadowMapSize * vec2( 4.0, 2.0 ) );\n\t\tvec3 lightToPosition = shadowCoord.xyz;\n\t\tfloat dp = ( length( lightToPosition ) - shadowCameraNear ) / ( shadowCameraFar - shadowCameraNear );\t\tdp += shadowBias;\n\t\tvec3 bd3D = normalize( lightToPosition );\n\t\t#if defined( SHADOWMAP_TYPE_PCF ) || defined( SHADOWMAP_TYPE_PCF_SOFT ) || defined( SHADOWMAP_TYPE_VSM )\n\t\t\tvec2 offset = vec2( - 1, 1 ) * shadowRadius * texelSize.y;\n\t\t\treturn (\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyx, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyx, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxx, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxx, texelSize.y ), dp )\n\t\t\t) * ( 1.0 / 9.0 );\n\t\t#else\n\t\t\treturn texture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp );\n\t\t#endif\n\t}\n#endif";

		var shadowmap_pars_vertex = "#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHT_SHADOWS > 0\n\t\tuniform mat4 directionalShadowMatrix[ NUM_DIR_LIGHT_SHADOWS ];\n\t\tvarying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHT_SHADOWS ];\n\t\tstruct DirectionalLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t};\n\t\tuniform DirectionalLightShadow directionalLightShadows[ NUM_DIR_LIGHT_SHADOWS ];\n\t#endif\n\t#if NUM_SPOT_LIGHT_SHADOWS > 0\n\t\tuniform mat4 spotShadowMatrix[ NUM_SPOT_LIGHT_SHADOWS ];\n\t\tvarying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHT_SHADOWS ];\n\t\tstruct SpotLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t};\n\t\tuniform SpotLightShadow spotLightShadows[ NUM_SPOT_LIGHT_SHADOWS ];\n\t#endif\n\t#if NUM_POINT_LIGHT_SHADOWS > 0\n\t\tuniform mat4 pointShadowMatrix[ NUM_POINT_LIGHT_SHADOWS ];\n\t\tvarying vec4 vPointShadowCoord[ NUM_POINT_LIGHT_SHADOWS ];\n\t\tstruct PointLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t\tfloat shadowCameraNear;\n\t\t\tfloat shadowCameraFar;\n\t\t};\n\t\tuniform PointLightShadow pointLightShadows[ NUM_POINT_LIGHT_SHADOWS ];\n\t#endif\n#endif";

		var shadowmap_vertex = "#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHT_SHADOWS > 0 || NUM_SPOT_LIGHT_SHADOWS > 0 || NUM_POINT_LIGHT_SHADOWS > 0\n\t\tvec3 shadowWorldNormal = inverseTransformDirection( transformedNormal, viewMatrix );\n\t\tvec4 shadowWorldPosition;\n\t#endif\n\t#if NUM_DIR_LIGHT_SHADOWS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_DIR_LIGHT_SHADOWS; i ++ ) {\n\t\tshadowWorldPosition = worldPosition + vec4( shadowWorldNormal * directionalLightShadows[ i ].shadowNormalBias, 0 );\n\t\tvDirectionalShadowCoord[ i ] = directionalShadowMatrix[ i ] * shadowWorldPosition;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n\t#if NUM_SPOT_LIGHT_SHADOWS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_SPOT_LIGHT_SHADOWS; i ++ ) {\n\t\tshadowWorldPosition = worldPosition + vec4( shadowWorldNormal * spotLightShadows[ i ].shadowNormalBias, 0 );\n\t\tvSpotShadowCoord[ i ] = spotShadowMatrix[ i ] * shadowWorldPosition;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n\t#if NUM_POINT_LIGHT_SHADOWS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_POINT_LIGHT_SHADOWS; i ++ ) {\n\t\tshadowWorldPosition = worldPosition + vec4( shadowWorldNormal * pointLightShadows[ i ].shadowNormalBias, 0 );\n\t\tvPointShadowCoord[ i ] = pointShadowMatrix[ i ] * shadowWorldPosition;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n#endif";

		var shadowmask_pars_fragment = "float getShadowMask() {\n\tfloat shadow = 1.0;\n\t#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHT_SHADOWS > 0\n\tDirectionalLightShadow directionalLight;\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_DIR_LIGHT_SHADOWS; i ++ ) {\n\t\tdirectionalLight = directionalLightShadows[ i ];\n\t\tshadow *= receiveShadow ? getShadow( directionalShadowMap[ i ], directionalLight.shadowMapSize, directionalLight.shadowBias, directionalLight.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n\t#if NUM_SPOT_LIGHT_SHADOWS > 0\n\tSpotLightShadow spotLight;\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_SPOT_LIGHT_SHADOWS; i ++ ) {\n\t\tspotLight = spotLightShadows[ i ];\n\t\tshadow *= receiveShadow ? getShadow( spotShadowMap[ i ], spotLight.shadowMapSize, spotLight.shadowBias, spotLight.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n\t#if NUM_POINT_LIGHT_SHADOWS > 0\n\tPointLightShadow pointLight;\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_POINT_LIGHT_SHADOWS; i ++ ) {\n\t\tpointLight = pointLightShadows[ i ];\n\t\tshadow *= receiveShadow ? getPointShadow( pointShadowMap[ i ], pointLight.shadowMapSize, pointLight.shadowBias, pointLight.shadowRadius, vPointShadowCoord[ i ], pointLight.shadowCameraNear, pointLight.shadowCameraFar ) : 1.0;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n\t#endif\n\treturn shadow;\n}";

		var skinbase_vertex = "#ifdef USE_SKINNING\n\tmat4 boneMatX = getBoneMatrix( skinIndex.x );\n\tmat4 boneMatY = getBoneMatrix( skinIndex.y );\n\tmat4 boneMatZ = getBoneMatrix( skinIndex.z );\n\tmat4 boneMatW = getBoneMatrix( skinIndex.w );\n#endif";

		var skinning_pars_vertex = "#ifdef USE_SKINNING\n\tuniform mat4 bindMatrix;\n\tuniform mat4 bindMatrixInverse;\n\t#ifdef BONE_TEXTURE\n\t\tuniform highp sampler2D boneTexture;\n\t\tuniform int boneTextureSize;\n\t\tmat4 getBoneMatrix( const in float i ) {\n\t\t\tfloat j = i * 4.0;\n\t\t\tfloat x = mod( j, float( boneTextureSize ) );\n\t\t\tfloat y = floor( j / float( boneTextureSize ) );\n\t\t\tfloat dx = 1.0 / float( boneTextureSize );\n\t\t\tfloat dy = 1.0 / float( boneTextureSize );\n\t\t\ty = dy * ( y + 0.5 );\n\t\t\tvec4 v1 = texture2D( boneTexture, vec2( dx * ( x + 0.5 ), y ) );\n\t\t\tvec4 v2 = texture2D( boneTexture, vec2( dx * ( x + 1.5 ), y ) );\n\t\t\tvec4 v3 = texture2D( boneTexture, vec2( dx * ( x + 2.5 ), y ) );\n\t\t\tvec4 v4 = texture2D( boneTexture, vec2( dx * ( x + 3.5 ), y ) );\n\t\t\tmat4 bone = mat4( v1, v2, v3, v4 );\n\t\t\treturn bone;\n\t\t}\n\t#else\n\t\tuniform mat4 boneMatrices[ MAX_BONES ];\n\t\tmat4 getBoneMatrix( const in float i ) {\n\t\t\tmat4 bone = boneMatrices[ int(i) ];\n\t\t\treturn bone;\n\t\t}\n\t#endif\n#endif";

		var skinning_vertex = "#ifdef USE_SKINNING\n\tvec4 skinVertex = bindMatrix * vec4( transformed, 1.0 );\n\tvec4 skinned = vec4( 0.0 );\n\tskinned += boneMatX * skinVertex * skinWeight.x;\n\tskinned += boneMatY * skinVertex * skinWeight.y;\n\tskinned += boneMatZ * skinVertex * skinWeight.z;\n\tskinned += boneMatW * skinVertex * skinWeight.w;\n\ttransformed = ( bindMatrixInverse * skinned ).xyz;\n#endif";

		var skinnormal_vertex = "#ifdef USE_SKINNING\n\tmat4 skinMatrix = mat4( 0.0 );\n\tskinMatrix += skinWeight.x * boneMatX;\n\tskinMatrix += skinWeight.y * boneMatY;\n\tskinMatrix += skinWeight.z * boneMatZ;\n\tskinMatrix += skinWeight.w * boneMatW;\n\tskinMatrix = bindMatrixInverse * skinMatrix * bindMatrix;\n\tobjectNormal = vec4( skinMatrix * vec4( objectNormal, 0.0 ) ).xyz;\n\t#ifdef USE_TANGENT\n\t\tobjectTangent = vec4( skinMatrix * vec4( objectTangent, 0.0 ) ).xyz;\n\t#endif\n#endif";

		var specularmap_fragment = "float specularStrength;\n#ifdef USE_SPECULARMAP\n\tvec4 texelSpecular = texture2D( specularMap, vUv );\n\tspecularStrength = texelSpecular.r;\n#else\n\tspecularStrength = 1.0;\n#endif";

		var specularmap_pars_fragment = "#ifdef USE_SPECULARMAP\n\tuniform sampler2D specularMap;\n#endif";

		var tonemapping_fragment = "#if defined( TONE_MAPPING )\n\tgl_FragColor.rgb = toneMapping( gl_FragColor.rgb );\n#endif";

		var tonemapping_pars_fragment = "#ifndef saturate\n#define saturate(a) clamp( a, 0.0, 1.0 )\n#endif\nuniform float toneMappingExposure;\nvec3 LinearToneMapping( vec3 color ) {\n\treturn toneMappingExposure * color;\n}\nvec3 ReinhardToneMapping( vec3 color ) {\n\tcolor *= toneMappingExposure;\n\treturn saturate( color / ( vec3( 1.0 ) + color ) );\n}\nvec3 OptimizedCineonToneMapping( vec3 color ) {\n\tcolor *= toneMappingExposure;\n\tcolor = max( vec3( 0.0 ), color - 0.004 );\n\treturn pow( ( color * ( 6.2 * color + 0.5 ) ) / ( color * ( 6.2 * color + 1.7 ) + 0.06 ), vec3( 2.2 ) );\n}\nvec3 RRTAndODTFit( vec3 v ) {\n\tvec3 a = v * ( v + 0.0245786 ) - 0.000090537;\n\tvec3 b = v * ( 0.983729 * v + 0.4329510 ) + 0.238081;\n\treturn a / b;\n}\nvec3 ACESFilmicToneMapping( vec3 color ) {\n\tconst mat3 ACESInputMat = mat3(\n\t\tvec3( 0.59719, 0.07600, 0.02840 ),\t\tvec3( 0.35458, 0.90834, 0.13383 ),\n\t\tvec3( 0.04823, 0.01566, 0.83777 )\n\t);\n\tconst mat3 ACESOutputMat = mat3(\n\t\tvec3(  1.60475, -0.10208, -0.00327 ),\t\tvec3( -0.53108,  1.10813, -0.07276 ),\n\t\tvec3( -0.07367, -0.00605,  1.07602 )\n\t);\n\tcolor *= toneMappingExposure / 0.6;\n\tcolor = ACESInputMat * color;\n\tcolor = RRTAndODTFit( color );\n\tcolor = ACESOutputMat * color;\n\treturn saturate( color );\n}\nvec3 CustomToneMapping( vec3 color ) { return color; }";

		var transmissionmap_fragment = "#ifdef USE_TRANSMISSIONMAP\n\ttotalTransmission *= texture2D( transmissionMap, vUv ).r;\n#endif";

		var transmissionmap_pars_fragment = "#ifdef USE_TRANSMISSIONMAP\n\tuniform sampler2D transmissionMap;\n#endif";

		var uv_pars_fragment = "#if ( defined( USE_UV ) && ! defined( UVS_VERTEX_ONLY ) )\n\tvarying vec2 vUv;\n#endif";

		var uv_pars_vertex = "#ifdef USE_UV\n\t#ifdef UVS_VERTEX_ONLY\n\t\tvec2 vUv;\n\t#else\n\t\tvarying vec2 vUv;\n\t#endif\n\tuniform mat3 uvTransform;\n#endif";

		var uv_vertex = "#ifdef USE_UV\n\tvUv = ( uvTransform * vec3( uv, 1 ) ).xy;\n#endif";

		var uv2_pars_fragment = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n\tvarying vec2 vUv2;\n#endif";

		var uv2_pars_vertex = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n\tattribute vec2 uv2;\n\tvarying vec2 vUv2;\n\tuniform mat3 uv2Transform;\n#endif";

		var uv2_vertex = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n\tvUv2 = ( uv2Transform * vec3( uv2, 1 ) ).xy;\n#endif";

		var worldpos_vertex = "#if defined( USE_ENVMAP ) || defined( DISTANCE ) || defined ( USE_SHADOWMAP )\n\tvec4 worldPosition = vec4( transformed, 1.0 );\n\t#ifdef USE_INSTANCING\n\t\tworldPosition = instanceMatrix * worldPosition;\n\t#endif\n\tworldPosition = modelMatrix * worldPosition;\n#endif";

		var background_frag = "uniform sampler2D t2D;\nvarying vec2 vUv;\nvoid main() {\n\tvec4 texColor = texture2D( t2D, vUv );\n\tgl_FragColor = mapTexelToLinear( texColor );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n}";

		var background_vert = "varying vec2 vUv;\nuniform mat3 uvTransform;\nvoid main() {\n\tvUv = ( uvTransform * vec3( uv, 1 ) ).xy;\n\tgl_Position = vec4( position.xy, 1.0, 1.0 );\n}";

		var cube_frag = "#include <envmap_common_pars_fragment>\nuniform float opacity;\nvarying vec3 vWorldDirection;\n#include <cube_uv_reflection_fragment>\nvoid main() {\n\tvec3 vReflect = vWorldDirection;\n\t#include <envmap_fragment>\n\tgl_FragColor = envColor;\n\tgl_FragColor.a *= opacity;\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n}";

		var cube_vert = "varying vec3 vWorldDirection;\n#include <common>\nvoid main() {\n\tvWorldDirection = transformDirection( position, modelMatrix );\n\t#include <begin_vertex>\n\t#include <project_vertex>\n\tgl_Position.z = gl_Position.w;\n}";

		var depth_frag = "#if DEPTH_PACKING == 3200\n\tuniform float opacity;\n#endif\n#include <common>\n#include <packing>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvarying vec2 vHighPrecisionZW;\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( 1.0 );\n\t#if DEPTH_PACKING == 3200\n\t\tdiffuseColor.a = opacity;\n\t#endif\n\t#include <map_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <logdepthbuf_fragment>\n\tfloat fragCoordZ = 0.5 * vHighPrecisionZW[0] / vHighPrecisionZW[1] + 0.5;\n\t#if DEPTH_PACKING == 3200\n\t\tgl_FragColor = vec4( vec3( 1.0 - fragCoordZ ), opacity );\n\t#elif DEPTH_PACKING == 3201\n\t\tgl_FragColor = packDepthToRGBA( fragCoordZ );\n\t#endif\n}";

		var depth_vert = "#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvarying vec2 vHighPrecisionZW;\nvoid main() {\n\t#include <uv_vertex>\n\t#include <skinbase_vertex>\n\t#ifdef USE_DISPLACEMENTMAP\n\t\t#include <beginnormal_vertex>\n\t\t#include <morphnormal_vertex>\n\t\t#include <skinnormal_vertex>\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\tvHighPrecisionZW = gl_Position.zw;\n}";

		var distanceRGBA_frag = "#define DISTANCE\nuniform vec3 referencePosition;\nuniform float nearDistance;\nuniform float farDistance;\nvarying vec3 vWorldPosition;\n#include <common>\n#include <packing>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main () {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( 1.0 );\n\t#include <map_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\tfloat dist = length( vWorldPosition - referencePosition );\n\tdist = ( dist - nearDistance ) / ( farDistance - nearDistance );\n\tdist = saturate( dist );\n\tgl_FragColor = packDepthToRGBA( dist );\n}";

		var distanceRGBA_vert = "#define DISTANCE\nvarying vec3 vWorldPosition;\n#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <skinbase_vertex>\n\t#ifdef USE_DISPLACEMENTMAP\n\t\t#include <beginnormal_vertex>\n\t\t#include <morphnormal_vertex>\n\t\t#include <skinnormal_vertex>\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <worldpos_vertex>\n\t#include <clipping_planes_vertex>\n\tvWorldPosition = worldPosition.xyz;\n}";

		var equirect_frag = "uniform sampler2D tEquirect;\nvarying vec3 vWorldDirection;\n#include <common>\nvoid main() {\n\tvec3 direction = normalize( vWorldDirection );\n\tvec2 sampleUV = equirectUv( direction );\n\tvec4 texColor = texture2D( tEquirect, sampleUV );\n\tgl_FragColor = mapTexelToLinear( texColor );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n}";

		var equirect_vert = "varying vec3 vWorldDirection;\n#include <common>\nvoid main() {\n\tvWorldDirection = transformDirection( position, modelMatrix );\n\t#include <begin_vertex>\n\t#include <project_vertex>\n}";

		var linedashed_frag = "uniform vec3 diffuse;\nuniform float opacity;\nuniform float dashSize;\nuniform float totalSize;\nvarying float vLineDistance;\n#include <common>\n#include <color_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tif ( mod( vLineDistance, totalSize ) > dashSize ) {\n\t\tdiscard;\n\t}\n\tvec3 outgoingLight = vec3( 0.0 );\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <color_fragment>\n\toutgoingLight = diffuseColor.rgb;\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n}";

		var linedashed_vert = "uniform float scale;\nattribute float lineDistance;\nvarying float vLineDistance;\n#include <common>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\tvLineDistance = scale * lineDistance;\n\t#include <color_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <fog_vertex>\n}";

		var meshbasic_frag = "uniform vec3 diffuse;\nuniform float opacity;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_pars_fragment>\n#include <cube_uv_reflection_fragment>\n#include <fog_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <specularmap_fragment>\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\t#ifdef USE_LIGHTMAP\n\t\n\t\tvec4 lightMapTexel= texture2D( lightMap, vUv2 );\n\t\treflectedLight.indirectDiffuse += lightMapTexelToLinear( lightMapTexel ).rgb * lightMapIntensity;\n\t#else\n\t\treflectedLight.indirectDiffuse += vec3( 1.0 );\n\t#endif\n\t#include <aomap_fragment>\n\treflectedLight.indirectDiffuse *= diffuseColor.rgb;\n\tvec3 outgoingLight = reflectedLight.indirectDiffuse;\n\t#include <envmap_fragment>\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

		var meshbasic_vert = "#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <envmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <skinbase_vertex>\n\t#ifdef USE_ENVMAP\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <worldpos_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <envmap_vertex>\n\t#include <fog_vertex>\n}";

		var meshlambert_frag = "uniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float opacity;\nvarying vec3 vLightFront;\nvarying vec3 vIndirectFront;\n#ifdef DOUBLE_SIDED\n\tvarying vec3 vLightBack;\n\tvarying vec3 vIndirectBack;\n#endif\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_pars_fragment>\n#include <cube_uv_reflection_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <fog_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <shadowmask_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <specularmap_fragment>\n\t#include <emissivemap_fragment>\n\t#ifdef DOUBLE_SIDED\n\t\treflectedLight.indirectDiffuse += ( gl_FrontFacing ) ? vIndirectFront : vIndirectBack;\n\t#else\n\t\treflectedLight.indirectDiffuse += vIndirectFront;\n\t#endif\n\t#include <lightmap_fragment>\n\treflectedLight.indirectDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb );\n\t#ifdef DOUBLE_SIDED\n\t\treflectedLight.directDiffuse = ( gl_FrontFacing ) ? vLightFront : vLightBack;\n\t#else\n\t\treflectedLight.directDiffuse = vLightFront;\n\t#endif\n\treflectedLight.directDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb ) * getShadowMask();\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;\n\t#include <envmap_fragment>\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

		var meshlambert_vert = "#define LAMBERT\nvarying vec3 vLightFront;\nvarying vec3 vIndirectFront;\n#ifdef DOUBLE_SIDED\n\tvarying vec3 vLightBack;\n\tvarying vec3 vIndirectBack;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <envmap_pars_vertex>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <worldpos_vertex>\n\t#include <envmap_vertex>\n\t#include <lights_lambert_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}";

		var meshmatcap_frag = "#define MATCAP\nuniform vec3 diffuse;\nuniform float opacity;\nuniform sampler2D matcap;\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <fog_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\tvec3 viewDir = normalize( vViewPosition );\n\tvec3 x = normalize( vec3( viewDir.z, 0.0, - viewDir.x ) );\n\tvec3 y = cross( viewDir, x );\n\tvec2 uv = vec2( dot( x, normal ), dot( y, normal ) ) * 0.495 + 0.5;\n\t#ifdef USE_MATCAP\n\t\tvec4 matcapColor = texture2D( matcap, uv );\n\t\tmatcapColor = matcapTexelToLinear( matcapColor );\n\t#else\n\t\tvec4 matcapColor = vec4( 1.0 );\n\t#endif\n\tvec3 outgoingLight = diffuseColor.rgb * matcapColor.rgb;\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

		var meshmatcap_vert = "#define MATCAP\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <color_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <color_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#ifndef FLAT_SHADED\n\t\tvNormal = normalize( transformedNormal );\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <fog_vertex>\n\tvViewPosition = - mvPosition.xyz;\n}";

		var meshtoon_frag = "#define TOON\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <gradientmap_pars_fragment>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <lights_toon_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\t#include <emissivemap_fragment>\n\t#include <lights_toon_fragment>\n\t#include <lights_fragment_begin>\n\t#include <lights_fragment_maps>\n\t#include <lights_fragment_end>\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

		var meshtoon_vert = "#define TOON\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n#ifndef FLAT_SHADED\n\tvNormal = normalize( transformedNormal );\n#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\tvViewPosition = - mvPosition.xyz;\n\t#include <worldpos_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}";

		var meshphong_frag = "#define PHONG\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform vec3 specular;\nuniform float shininess;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_pars_fragment>\n#include <cube_uv_reflection_fragment>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <lights_phong_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <specularmap_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\t#include <emissivemap_fragment>\n\t#include <lights_phong_fragment>\n\t#include <lights_fragment_begin>\n\t#include <lights_fragment_maps>\n\t#include <lights_fragment_end>\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\n\t#include <envmap_fragment>\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

		var meshphong_vert = "#define PHONG\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <envmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n#ifndef FLAT_SHADED\n\tvNormal = normalize( transformedNormal );\n#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\tvViewPosition = - mvPosition.xyz;\n\t#include <worldpos_vertex>\n\t#include <envmap_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}";

		var meshphysical_frag = "#define STANDARD\n#ifdef PHYSICAL\n\t#define REFLECTIVITY\n\t#define CLEARCOAT\n\t#define TRANSMISSION\n#endif\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float roughness;\nuniform float metalness;\nuniform float opacity;\n#ifdef TRANSMISSION\n\tuniform float transmission;\n#endif\n#ifdef REFLECTIVITY\n\tuniform float reflectivity;\n#endif\n#ifdef CLEARCOAT\n\tuniform float clearcoat;\n\tuniform float clearcoatRoughness;\n#endif\n#ifdef USE_SHEEN\n\tuniform vec3 sheen;\n#endif\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n\t#ifdef USE_TANGENT\n\t\tvarying vec3 vTangent;\n\t\tvarying vec3 vBitangent;\n\t#endif\n#endif\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <transmissionmap_pars_fragment>\n#include <bsdfs>\n#include <cube_uv_reflection_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_physical_pars_fragment>\n#include <fog_pars_fragment>\n#include <lights_pars_begin>\n#include <lights_physical_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <clearcoat_pars_fragment>\n#include <roughnessmap_pars_fragment>\n#include <metalnessmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#ifdef TRANSMISSION\n\t\tfloat totalTransmission = transmission;\n\t#endif\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <roughnessmap_fragment>\n\t#include <metalnessmap_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\t#include <clearcoat_normal_fragment_begin>\n\t#include <clearcoat_normal_fragment_maps>\n\t#include <emissivemap_fragment>\n\t#include <transmissionmap_fragment>\n\t#include <lights_physical_fragment>\n\t#include <lights_fragment_begin>\n\t#include <lights_fragment_maps>\n\t#include <lights_fragment_end>\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\n\t#ifdef TRANSMISSION\n\t\tdiffuseColor.a *= saturate( 1. - totalTransmission + linearToRelativeLuminance( reflectedLight.directSpecular + reflectedLight.indirectSpecular ) );\n\t#endif\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

		var meshphysical_vert = "#define STANDARD\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n\t#ifdef USE_TANGENT\n\t\tvarying vec3 vTangent;\n\t\tvarying vec3 vBitangent;\n\t#endif\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n#ifndef FLAT_SHADED\n\tvNormal = normalize( transformedNormal );\n\t#ifdef USE_TANGENT\n\t\tvTangent = normalize( transformedTangent );\n\t\tvBitangent = normalize( cross( vNormal, vTangent ) * tangent.w );\n\t#endif\n#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\tvViewPosition = - mvPosition.xyz;\n\t#include <worldpos_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}";

		var normal_frag = "#define NORMAL\nuniform float opacity;\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\n\tvarying vec3 vViewPosition;\n#endif\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n\t#ifdef USE_TANGENT\n\t\tvarying vec3 vTangent;\n\t\tvarying vec3 vBitangent;\n\t#endif\n#endif\n#include <packing>\n#include <uv_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\t#include <logdepthbuf_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\tgl_FragColor = vec4( packNormalToRGB( normal ), opacity );\n}";

		var normal_vert = "#define NORMAL\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\n\tvarying vec3 vViewPosition;\n#endif\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n\t#ifdef USE_TANGENT\n\t\tvarying vec3 vTangent;\n\t\tvarying vec3 vBitangent;\n\t#endif\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n#ifndef FLAT_SHADED\n\tvNormal = normalize( transformedNormal );\n\t#ifdef USE_TANGENT\n\t\tvTangent = normalize( transformedTangent );\n\t\tvBitangent = normalize( cross( vNormal, vTangent ) * tangent.w );\n\t#endif\n#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\n\tvViewPosition = - mvPosition.xyz;\n#endif\n}";

		var points_frag = "uniform vec3 diffuse;\nuniform float opacity;\n#include <common>\n#include <color_pars_fragment>\n#include <map_particle_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec3 outgoingLight = vec3( 0.0 );\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <map_particle_fragment>\n\t#include <color_fragment>\n\t#include <alphatest_fragment>\n\toutgoingLight = diffuseColor.rgb;\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n}";

		var points_vert = "uniform float size;\nuniform float scale;\n#include <common>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <color_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <project_vertex>\n\tgl_PointSize = size;\n\t#ifdef USE_SIZEATTENUATION\n\t\tbool isPerspective = isPerspectiveMatrix( projectionMatrix );\n\t\tif ( isPerspective ) gl_PointSize *= ( scale / - mvPosition.z );\n\t#endif\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <worldpos_vertex>\n\t#include <fog_vertex>\n}";

		var shadow_frag = "uniform vec3 color;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <shadowmap_pars_fragment>\n#include <shadowmask_pars_fragment>\nvoid main() {\n\tgl_FragColor = vec4( color, opacity * ( 1.0 - getShadowMask() ) );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n}";

		var shadow_vert = "#include <common>\n#include <fog_pars_vertex>\n#include <shadowmap_pars_vertex>\nvoid main() {\n\t#include <begin_vertex>\n\t#include <project_vertex>\n\t#include <worldpos_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}";

		var sprite_frag = "uniform vec3 diffuse;\nuniform float opacity;\n#include <common>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec3 outgoingLight = vec3( 0.0 );\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\toutgoingLight = diffuseColor.rgb;\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n}";

		var sprite_vert = "uniform float rotation;\nuniform vec2 center;\n#include <common>\n#include <uv_pars_vertex>\n#include <fog_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\tvec4 mvPosition = modelViewMatrix * vec4( 0.0, 0.0, 0.0, 1.0 );\n\tvec2 scale;\n\tscale.x = length( vec3( modelMatrix[ 0 ].x, modelMatrix[ 0 ].y, modelMatrix[ 0 ].z ) );\n\tscale.y = length( vec3( modelMatrix[ 1 ].x, modelMatrix[ 1 ].y, modelMatrix[ 1 ].z ) );\n\t#ifndef USE_SIZEATTENUATION\n\t\tbool isPerspective = isPerspectiveMatrix( projectionMatrix );\n\t\tif ( isPerspective ) scale *= - mvPosition.z;\n\t#endif\n\tvec2 alignedPosition = ( position.xy - ( center - vec2( 0.5 ) ) ) * scale;\n\tvec2 rotatedPosition;\n\trotatedPosition.x = cos( rotation ) * alignedPosition.x - sin( rotation ) * alignedPosition.y;\n\trotatedPosition.y = sin( rotation ) * alignedPosition.x + cos( rotation ) * alignedPosition.y;\n\tmvPosition.xy += rotatedPosition;\n\tgl_Position = projectionMatrix * mvPosition;\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <fog_vertex>\n}";

		var ShaderChunk = {
			alphamap_fragment: alphamap_fragment,
			alphamap_pars_fragment: alphamap_pars_fragment,
			alphatest_fragment: alphatest_fragment,
			aomap_fragment: aomap_fragment,
			aomap_pars_fragment: aomap_pars_fragment,
			begin_vertex: begin_vertex,
			beginnormal_vertex: beginnormal_vertex,
			bsdfs: bsdfs,
			bumpmap_pars_fragment: bumpmap_pars_fragment,
			clipping_planes_fragment: clipping_planes_fragment,
			clipping_planes_pars_fragment: clipping_planes_pars_fragment,
			clipping_planes_pars_vertex: clipping_planes_pars_vertex,
			clipping_planes_vertex: clipping_planes_vertex,
			color_fragment: color_fragment,
			color_pars_fragment: color_pars_fragment,
			color_pars_vertex: color_pars_vertex,
			color_vertex: color_vertex,
			common: common,
			cube_uv_reflection_fragment: cube_uv_reflection_fragment,
			defaultnormal_vertex: defaultnormal_vertex,
			displacementmap_pars_vertex: displacementmap_pars_vertex,
			displacementmap_vertex: displacementmap_vertex,
			emissivemap_fragment: emissivemap_fragment,
			emissivemap_pars_fragment: emissivemap_pars_fragment,
			encodings_fragment: encodings_fragment,
			encodings_pars_fragment: encodings_pars_fragment,
			envmap_fragment: envmap_fragment,
			envmap_common_pars_fragment: envmap_common_pars_fragment,
			envmap_pars_fragment: envmap_pars_fragment,
			envmap_pars_vertex: envmap_pars_vertex,
			envmap_physical_pars_fragment: envmap_physical_pars_fragment,
			envmap_vertex: envmap_vertex,
			fog_vertex: fog_vertex,
			fog_pars_vertex: fog_pars_vertex,
			fog_fragment: fog_fragment,
			fog_pars_fragment: fog_pars_fragment,
			gradientmap_pars_fragment: gradientmap_pars_fragment,
			lightmap_fragment: lightmap_fragment,
			lightmap_pars_fragment: lightmap_pars_fragment,
			lights_lambert_vertex: lights_lambert_vertex,
			lights_pars_begin: lights_pars_begin,
			lights_toon_fragment: lights_toon_fragment,
			lights_toon_pars_fragment: lights_toon_pars_fragment,
			lights_phong_fragment: lights_phong_fragment,
			lights_phong_pars_fragment: lights_phong_pars_fragment,
			lights_physical_fragment: lights_physical_fragment,
			lights_physical_pars_fragment: lights_physical_pars_fragment,
			lights_fragment_begin: lights_fragment_begin,
			lights_fragment_maps: lights_fragment_maps,
			lights_fragment_end: lights_fragment_end,
			logdepthbuf_fragment: logdepthbuf_fragment,
			logdepthbuf_pars_fragment: logdepthbuf_pars_fragment,
			logdepthbuf_pars_vertex: logdepthbuf_pars_vertex,
			logdepthbuf_vertex: logdepthbuf_vertex,
			map_fragment: map_fragment,
			map_pars_fragment: map_pars_fragment,
			map_particle_fragment: map_particle_fragment,
			map_particle_pars_fragment: map_particle_pars_fragment,
			metalnessmap_fragment: metalnessmap_fragment,
			metalnessmap_pars_fragment: metalnessmap_pars_fragment,
			morphnormal_vertex: morphnormal_vertex,
			morphtarget_pars_vertex: morphtarget_pars_vertex,
			morphtarget_vertex: morphtarget_vertex,
			normal_fragment_begin: normal_fragment_begin,
			normal_fragment_maps: normal_fragment_maps,
			normalmap_pars_fragment: normalmap_pars_fragment,
			clearcoat_normal_fragment_begin: clearcoat_normal_fragment_begin,
			clearcoat_normal_fragment_maps: clearcoat_normal_fragment_maps,
			clearcoat_pars_fragment: clearcoat_pars_fragment,
			packing: packing,
			premultiplied_alpha_fragment: premultiplied_alpha_fragment,
			project_vertex: project_vertex,
			dithering_fragment: dithering_fragment,
			dithering_pars_fragment: dithering_pars_fragment,
			roughnessmap_fragment: roughnessmap_fragment,
			roughnessmap_pars_fragment: roughnessmap_pars_fragment,
			shadowmap_pars_fragment: shadowmap_pars_fragment,
			shadowmap_pars_vertex: shadowmap_pars_vertex,
			shadowmap_vertex: shadowmap_vertex,
			shadowmask_pars_fragment: shadowmask_pars_fragment,
			skinbase_vertex: skinbase_vertex,
			skinning_pars_vertex: skinning_pars_vertex,
			skinning_vertex: skinning_vertex,
			skinnormal_vertex: skinnormal_vertex,
			specularmap_fragment: specularmap_fragment,
			specularmap_pars_fragment: specularmap_pars_fragment,
			tonemapping_fragment: tonemapping_fragment,
			tonemapping_pars_fragment: tonemapping_pars_fragment,
			transmissionmap_fragment: transmissionmap_fragment,
			transmissionmap_pars_fragment: transmissionmap_pars_fragment,
			uv_pars_fragment: uv_pars_fragment,
			uv_pars_vertex: uv_pars_vertex,
			uv_vertex: uv_vertex,
			uv2_pars_fragment: uv2_pars_fragment,
			uv2_pars_vertex: uv2_pars_vertex,
			uv2_vertex: uv2_vertex,
			worldpos_vertex: worldpos_vertex,

			background_frag: background_frag,
			background_vert: background_vert,
			cube_frag: cube_frag,
			cube_vert: cube_vert,
			depth_frag: depth_frag,
			depth_vert: depth_vert,
			distanceRGBA_frag: distanceRGBA_frag,
			distanceRGBA_vert: distanceRGBA_vert,
			equirect_frag: equirect_frag,
			equirect_vert: equirect_vert,
			linedashed_frag: linedashed_frag,
			linedashed_vert: linedashed_vert,
			meshbasic_frag: meshbasic_frag,
			meshbasic_vert: meshbasic_vert,
			meshlambert_frag: meshlambert_frag,
			meshlambert_vert: meshlambert_vert,
			meshmatcap_frag: meshmatcap_frag,
			meshmatcap_vert: meshmatcap_vert,
			meshtoon_frag: meshtoon_frag,
			meshtoon_vert: meshtoon_vert,
			meshphong_frag: meshphong_frag,
			meshphong_vert: meshphong_vert,
			meshphysical_frag: meshphysical_frag,
			meshphysical_vert: meshphysical_vert,
			normal_frag: normal_frag,
			normal_vert: normal_vert,
			points_frag: points_frag,
			points_vert: points_vert,
			shadow_frag: shadow_frag,
			shadow_vert: shadow_vert,
			sprite_frag: sprite_frag,
			sprite_vert: sprite_vert
		};

		/**
		 * Uniforms library for shared webgl shaders
		 */

		var UniformsLib = {

			common: {

				diffuse: { value: new Color( 0xeeeeee ) },
				opacity: { value: 1.0 },

				map: { value: null },
				uvTransform: { value: new Matrix3() },
				uv2Transform: { value: new Matrix3() },

				alphaMap: { value: null },

			},

			specularmap: {

				specularMap: { value: null },

			},

			envmap: {

				envMap: { value: null },
				flipEnvMap: { value: - 1 },
				reflectivity: { value: 1.0 },
				refractionRatio: { value: 0.98 },
				maxMipLevel: { value: 0 }

			},

			aomap: {

				aoMap: { value: null },
				aoMapIntensity: { value: 1 }

			},

			lightmap: {

				lightMap: { value: null },
				lightMapIntensity: { value: 1 }

			},

			emissivemap: {

				emissiveMap: { value: null }

			},

			bumpmap: {

				bumpMap: { value: null },
				bumpScale: { value: 1 }

			},

			normalmap: {

				normalMap: { value: null },
				normalScale: { value: new Vector2( 1, 1 ) }

			},

			displacementmap: {

				displacementMap: { value: null },
				displacementScale: { value: 1 },
				displacementBias: { value: 0 }

			},

			roughnessmap: {

				roughnessMap: { value: null }

			},

			metalnessmap: {

				metalnessMap: { value: null }

			},

			gradientmap: {

				gradientMap: { value: null }

			},

			fog: {

				fogDensity: { value: 0.00025 },
				fogNear: { value: 1 },
				fogFar: { value: 2000 },
				fogColor: { value: new Color( 0xffffff ) }

			},

			lights: {

				ambientLightColor: { value: [] },

				lightProbe: { value: [] },

				directionalLights: { value: [], properties: {
					direction: {},
					color: {}
				} },

				directionalLightShadows: { value: [], properties: {
					shadowBias: {},
					shadowNormalBias: {},
					shadowRadius: {},
					shadowMapSize: {}
				} },

				directionalShadowMap: { value: [] },
				directionalShadowMatrix: { value: [] },

				spotLights: { value: [], properties: {
					color: {},
					position: {},
					direction: {},
					distance: {},
					coneCos: {},
					penumbraCos: {},
					decay: {}
				} },

				spotLightShadows: { value: [], properties: {
					shadowBias: {},
					shadowNormalBias: {},
					shadowRadius: {},
					shadowMapSize: {}
				} },

				spotShadowMap: { value: [] },
				spotShadowMatrix: { value: [] },

				pointLights: { value: [], properties: {
					color: {},
					position: {},
					decay: {},
					distance: {}
				} },

				pointLightShadows: { value: [], properties: {
					shadowBias: {},
					shadowNormalBias: {},
					shadowRadius: {},
					shadowMapSize: {},
					shadowCameraNear: {},
					shadowCameraFar: {}
				} },

				pointShadowMap: { value: [] },
				pointShadowMatrix: { value: [] },

				hemisphereLights: { value: [], properties: {
					direction: {},
					skyColor: {},
					groundColor: {}
				} },

				// TODO (abelnation): RectAreaLight BRDF data needs to be moved from example to main src
				rectAreaLights: { value: [], properties: {
					color: {},
					position: {},
					width: {},
					height: {}
				} },

				ltc_1: { value: null },
				ltc_2: { value: null }

			},

			points: {

				diffuse: { value: new Color( 0xeeeeee ) },
				opacity: { value: 1.0 },
				size: { value: 1.0 },
				scale: { value: 1.0 },
				map: { value: null },
				alphaMap: { value: null },
				uvTransform: { value: new Matrix3() }

			},

			sprite: {

				diffuse: { value: new Color( 0xeeeeee ) },
				opacity: { value: 1.0 },
				center: { value: new Vector2( 0.5, 0.5 ) },
				rotation: { value: 0.0 },
				map: { value: null },
				alphaMap: { value: null },
				uvTransform: { value: new Matrix3() }

			}

		};

		var ShaderLib = {

			basic: {

				uniforms: mergeUniforms( [
					UniformsLib.common,
					UniformsLib.specularmap,
					UniformsLib.envmap,
					UniformsLib.aomap,
					UniformsLib.lightmap,
					UniformsLib.fog
				] ),

				vertexShader: ShaderChunk.meshbasic_vert,
				fragmentShader: ShaderChunk.meshbasic_frag

			},

			lambert: {

				uniforms: mergeUniforms( [
					UniformsLib.common,
					UniformsLib.specularmap,
					UniformsLib.envmap,
					UniformsLib.aomap,
					UniformsLib.lightmap,
					UniformsLib.emissivemap,
					UniformsLib.fog,
					UniformsLib.lights,
					{
						emissive: { value: new Color( 0x000000 ) }
					}
				] ),

				vertexShader: ShaderChunk.meshlambert_vert,
				fragmentShader: ShaderChunk.meshlambert_frag

			},

			phong: {

				uniforms: mergeUniforms( [
					UniformsLib.common,
					UniformsLib.specularmap,
					UniformsLib.envmap,
					UniformsLib.aomap,
					UniformsLib.lightmap,
					UniformsLib.emissivemap,
					UniformsLib.bumpmap,
					UniformsLib.normalmap,
					UniformsLib.displacementmap,
					UniformsLib.fog,
					UniformsLib.lights,
					{
						emissive: { value: new Color( 0x000000 ) },
						specular: { value: new Color( 0x111111 ) },
						shininess: { value: 30 }
					}
				] ),

				vertexShader: ShaderChunk.meshphong_vert,
				fragmentShader: ShaderChunk.meshphong_frag

			},

			standard: {

				uniforms: mergeUniforms( [
					UniformsLib.common,
					UniformsLib.envmap,
					UniformsLib.aomap,
					UniformsLib.lightmap,
					UniformsLib.emissivemap,
					UniformsLib.bumpmap,
					UniformsLib.normalmap,
					UniformsLib.displacementmap,
					UniformsLib.roughnessmap,
					UniformsLib.metalnessmap,
					UniformsLib.fog,
					UniformsLib.lights,
					{
						emissive: { value: new Color( 0x000000 ) },
						roughness: { value: 1.0 },
						metalness: { value: 0.0 },
						envMapIntensity: { value: 1 } // temporary
					}
				] ),

				vertexShader: ShaderChunk.meshphysical_vert,
				fragmentShader: ShaderChunk.meshphysical_frag

			},

			toon: {

				uniforms: mergeUniforms( [
					UniformsLib.common,
					UniformsLib.aomap,
					UniformsLib.lightmap,
					UniformsLib.emissivemap,
					UniformsLib.bumpmap,
					UniformsLib.normalmap,
					UniformsLib.displacementmap,
					UniformsLib.gradientmap,
					UniformsLib.fog,
					UniformsLib.lights,
					{
						emissive: { value: new Color( 0x000000 ) }
					}
				] ),

				vertexShader: ShaderChunk.meshtoon_vert,
				fragmentShader: ShaderChunk.meshtoon_frag

			},

			matcap: {

				uniforms: mergeUniforms( [
					UniformsLib.common,
					UniformsLib.bumpmap,
					UniformsLib.normalmap,
					UniformsLib.displacementmap,
					UniformsLib.fog,
					{
						matcap: { value: null }
					}
				] ),

				vertexShader: ShaderChunk.meshmatcap_vert,
				fragmentShader: ShaderChunk.meshmatcap_frag

			},

			points: {

				uniforms: mergeUniforms( [
					UniformsLib.points,
					UniformsLib.fog
				] ),

				vertexShader: ShaderChunk.points_vert,
				fragmentShader: ShaderChunk.points_frag

			},

			dashed: {

				uniforms: mergeUniforms( [
					UniformsLib.common,
					UniformsLib.fog,
					{
						scale: { value: 1 },
						dashSize: { value: 1 },
						totalSize: { value: 2 }
					}
				] ),

				vertexShader: ShaderChunk.linedashed_vert,
				fragmentShader: ShaderChunk.linedashed_frag

			},

			depth: {

				uniforms: mergeUniforms( [
					UniformsLib.common,
					UniformsLib.displacementmap
				] ),

				vertexShader: ShaderChunk.depth_vert,
				fragmentShader: ShaderChunk.depth_frag

			},

			normal: {

				uniforms: mergeUniforms( [
					UniformsLib.common,
					UniformsLib.bumpmap,
					UniformsLib.normalmap,
					UniformsLib.displacementmap,
					{
						opacity: { value: 1.0 }
					}
				] ),

				vertexShader: ShaderChunk.normal_vert,
				fragmentShader: ShaderChunk.normal_frag

			},

			sprite: {

				uniforms: mergeUniforms( [
					UniformsLib.sprite,
					UniformsLib.fog
				] ),

				vertexShader: ShaderChunk.sprite_vert,
				fragmentShader: ShaderChunk.sprite_frag

			},

			background: {

				uniforms: {
					uvTransform: { value: new Matrix3() },
					t2D: { value: null },
				},

				vertexShader: ShaderChunk.background_vert,
				fragmentShader: ShaderChunk.background_frag

			},
			/* -------------------------------------------------------------------------
			//	Cube map shader
			 ------------------------------------------------------------------------- */

			cube: {

				uniforms: mergeUniforms( [
					UniformsLib.envmap,
					{
						opacity: { value: 1.0 }
					}
				] ),

				vertexShader: ShaderChunk.cube_vert,
				fragmentShader: ShaderChunk.cube_frag

			},

			equirect: {

				uniforms: {
					tEquirect: { value: null },
				},

				vertexShader: ShaderChunk.equirect_vert,
				fragmentShader: ShaderChunk.equirect_frag

			},

			distanceRGBA: {

				uniforms: mergeUniforms( [
					UniformsLib.common,
					UniformsLib.displacementmap,
					{
						referencePosition: { value: new Vector3() },
						nearDistance: { value: 1 },
						farDistance: { value: 1000 }
					}
				] ),

				vertexShader: ShaderChunk.distanceRGBA_vert,
				fragmentShader: ShaderChunk.distanceRGBA_frag

			},

			shadow: {

				uniforms: mergeUniforms( [
					UniformsLib.lights,
					UniformsLib.fog,
					{
						color: { value: new Color( 0x00000 ) },
						opacity: { value: 1.0 }
					} ] ),

				vertexShader: ShaderChunk.shadow_vert,
				fragmentShader: ShaderChunk.shadow_frag

			}

		};

		ShaderLib.physical = {

			uniforms: mergeUniforms( [
				ShaderLib.standard.uniforms,
				{
					clearcoat: { value: 0 },
					clearcoatMap: { value: null },
					clearcoatRoughness: { value: 0 },
					clearcoatRoughnessMap: { value: null },
					clearcoatNormalScale: { value: new Vector2( 1, 1 ) },
					clearcoatNormalMap: { value: null },
					sheen: { value: new Color( 0x000000 ) },
					transmission: { value: 0 },
					transmissionMap: { value: null },
				}
			] ),

			vertexShader: ShaderChunk.meshphysical_vert,
			fragmentShader: ShaderChunk.meshphysical_frag

		};

		function WebGLBackground( renderer, cubemaps, state, objects, premultipliedAlpha ) {

			var clearColor = new Color( 0x000000 );
			var clearAlpha = 0;

			var planeMesh;
			var boxMesh;

			var currentBackground = null;
			var currentBackgroundVersion = 0;
			var currentTonemapping = null;

			function render( renderList, scene, camera, forceClear ) {

				var background = scene.isScene === true ? scene.background : null;

				if ( background && background.isTexture ) {

					background = cubemaps.get( background );

				}

				// Ignore background in AR
				// TODO: Reconsider this.

				var xr = renderer.xr;
				var session = xr.getSession && xr.getSession();

				if ( session && session.environmentBlendMode === 'additive' ) {

					background = null;

				}

				if ( background === null ) {

					setClear( clearColor, clearAlpha );

				} else if ( background && background.isColor ) {

					setClear( background, 1 );
					forceClear = true;

				}

				if ( renderer.autoClear || forceClear ) {

					renderer.clear( renderer.autoClearColor, renderer.autoClearDepth, renderer.autoClearStencil );

				}

				if ( background && ( background.isCubeTexture || background.isWebGLCubeRenderTarget || background.isWebGLCubeRenderTargetTexture || background.mapping === CubeUVReflectionMapping ) ) {

					if ( boxMesh === undefined ) {

						boxMesh = new Mesh(
							new BoxBufferGeometry( 1, 1, 1 ),
							new ShaderMaterial( {
								name: 'BackgroundCubeMaterial',
								uniforms: cloneUniforms( ShaderLib.cube.uniforms ),
								vertexShader: ShaderLib.cube.vertexShader,
								fragmentShader: ShaderLib.cube.fragmentShader,
								side: BackSide,
								depthTest: false,
								depthWrite: false,
								fog: false
							} )
						);

						boxMesh.geometry.deleteAttribute( 'normal' );
						boxMesh.geometry.deleteAttribute( 'uv' );

						boxMesh.onBeforeRender = function ( renderer, scene, camera ) {

							this.matrixWorld.copyPosition( camera.matrixWorld );

						};

						// enable code injection for non-built-in material
						Object.defineProperty( boxMesh.material, 'envMap', {

							get: function () {

								return this.uniforms.envMap.value;

							}

						} );

						objects.update( boxMesh );

					}

					if ( background.isWebGLCubeRenderTarget ) {

						// TODO Deprecate

						background = background.texture;

					}

					boxMesh.material.uniforms.envMap.value = background;
					boxMesh.material.uniforms.flipEnvMap.value = background.isCubeTexture ? - 1 : 1;

					if ( currentBackground !== background ||
						currentBackgroundVersion !== background.version ||
						currentTonemapping !== renderer.toneMapping ) {

						boxMesh.material.needsUpdate = true;

						currentBackground = background;
						currentBackgroundVersion = background.version;
						currentTonemapping = renderer.toneMapping;

					}

					// push to the pre-sorted opaque render list
					renderList.unshift( boxMesh, boxMesh.geometry, boxMesh.material, 0, 0, null );

				} else if ( background && background.isTexture ) {

					if ( planeMesh === undefined ) {

						planeMesh = new Mesh(
							new PlaneBufferGeometry( 2, 2 ),
							new ShaderMaterial( {
								name: 'BackgroundMaterial',
								uniforms: cloneUniforms( ShaderLib.background.uniforms ),
								vertexShader: ShaderLib.background.vertexShader,
								fragmentShader: ShaderLib.background.fragmentShader,
								side: FrontSide,
								depthTest: false,
								depthWrite: false,
								fog: false
							} )
						);

						planeMesh.geometry.deleteAttribute( 'normal' );

						// enable code injection for non-built-in material
						Object.defineProperty( planeMesh.material, 'map', {

							get: function () {

								return this.uniforms.t2D.value;

							}

						} );

						objects.update( planeMesh );

					}

					planeMesh.material.uniforms.t2D.value = background;

					if ( background.matrixAutoUpdate === true ) {

						background.updateMatrix();

					}

					planeMesh.material.uniforms.uvTransform.value.copy( background.matrix );

					if ( currentBackground !== background ||
						currentBackgroundVersion !== background.version ||
						currentTonemapping !== renderer.toneMapping ) {

						planeMesh.material.needsUpdate = true;

						currentBackground = background;
						currentBackgroundVersion = background.version;
						currentTonemapping = renderer.toneMapping;

					}


					// push to the pre-sorted opaque render list
					renderList.unshift( planeMesh, planeMesh.geometry, planeMesh.material, 0, 0, null );

				}

			}

			function setClear( color, alpha ) {

				state.buffers.color.setClear( color.r, color.g, color.b, alpha, premultipliedAlpha );

			}

			return {

				getClearColor: function () {

					return clearColor;

				},
				setClearColor: function ( color, alpha ) {

					clearColor.set( color );
					clearAlpha = alpha !== undefined ? alpha : 1;
					setClear( clearColor, clearAlpha );

				},
				getClearAlpha: function () {

					return clearAlpha;

				},
				setClearAlpha: function ( alpha ) {

					clearAlpha = alpha;
					setClear( clearColor, clearAlpha );

				},
				render: render

			};

		}

		function WebGLBindingStates( gl, extensions, attributes, capabilities ) {

			var maxVertexAttributes = gl.getParameter( 34921 );

			var extension = capabilities.isWebGL2 ? null : extensions.get( 'OES_vertex_array_object' );
			var vaoAvailable = capabilities.isWebGL2 || extension !== null;

			var bindingStates = {};

			var defaultState = createBindingState( null );
			var currentState = defaultState;

			function setup( object, material, program, geometry, index ) {

				var updateBuffers = false;

				if ( vaoAvailable ) {

					var state = getBindingState( geometry, program, material );

					if ( currentState !== state ) {

						currentState = state;
						bindVertexArrayObject( currentState.object );

					}

					updateBuffers = needsUpdate( geometry, index );

					if ( updateBuffers ) { saveCache( geometry, index ); }

				} else {

					var wireframe = ( material.wireframe === true );

					if ( currentState.geometry !== geometry.id ||
						currentState.program !== program.id ||
						currentState.wireframe !== wireframe ) {

						currentState.geometry = geometry.id;
						currentState.program = program.id;
						currentState.wireframe = wireframe;

						updateBuffers = true;

					}

				}

				if ( object.isInstancedMesh === true ) {

					updateBuffers = true;

				}

				if ( index !== null ) {

					attributes.update( index, 34963 );

				}

				if ( updateBuffers ) {

					setupVertexAttributes( object, material, program, geometry );

					if ( index !== null ) {

						gl.bindBuffer( 34963, attributes.get( index ).buffer );

					}

				}

			}

			function createVertexArrayObject() {

				if ( capabilities.isWebGL2 ) { return gl.createVertexArray(); }

				return extension.createVertexArrayOES();

			}

			function bindVertexArrayObject( vao ) {

				if ( capabilities.isWebGL2 ) { return gl.bindVertexArray( vao ); }

				return extension.bindVertexArrayOES( vao );

			}

			function deleteVertexArrayObject( vao ) {

				if ( capabilities.isWebGL2 ) { return gl.deleteVertexArray( vao ); }

				return extension.deleteVertexArrayOES( vao );

			}

			function getBindingState( geometry, program, material ) {

				var wireframe = ( material.wireframe === true );

				var programMap = bindingStates[ geometry.id ];

				if ( programMap === undefined ) {

					programMap = {};
					bindingStates[ geometry.id ] = programMap;

				}

				var stateMap = programMap[ program.id ];

				if ( stateMap === undefined ) {

					stateMap = {};
					programMap[ program.id ] = stateMap;

				}

				var state = stateMap[ wireframe ];

				if ( state === undefined ) {

					state = createBindingState( createVertexArrayObject() );
					stateMap[ wireframe ] = state;

				}

				return state;

			}

			function createBindingState( vao ) {

				var newAttributes = [];
				var enabledAttributes = [];
				var attributeDivisors = [];

				for ( var i = 0; i < maxVertexAttributes; i ++ ) {

					newAttributes[ i ] = 0;
					enabledAttributes[ i ] = 0;
					attributeDivisors[ i ] = 0;

				}

				return {

					// for backward compatibility on non-VAO support browser
					geometry: null,
					program: null,
					wireframe: false,

					newAttributes: newAttributes,
					enabledAttributes: enabledAttributes,
					attributeDivisors: attributeDivisors,
					object: vao,
					attributes: {},
					index: null

				};

			}

			function needsUpdate( geometry, index ) {

				var cachedAttributes = currentState.attributes;
				var geometryAttributes = geometry.attributes;

				if ( Object.keys( cachedAttributes ).length !== Object.keys( geometryAttributes ).length ) { return true; }

				for ( var key in geometryAttributes ) {

					var cachedAttribute = cachedAttributes[ key ];
					var geometryAttribute = geometryAttributes[ key ];

					if ( cachedAttribute === undefined ) { return true; }

					if ( cachedAttribute.attribute !== geometryAttribute ) { return true; }

					if ( cachedAttribute.data !== geometryAttribute.data ) { return true; }

				}

				if ( currentState.index !== index ) { return true; }

				return false;

			}

			function saveCache( geometry, index ) {

				var cache = {};
				var attributes = geometry.attributes;

				for ( var key in attributes ) {

					var attribute = attributes[ key ];

					var data = {};
					data.attribute = attribute;

					if ( attribute.data ) {

						data.data = attribute.data;

					}

					cache[ key ] = data;

				}

				currentState.attributes = cache;

				currentState.index = index;

			}

			function initAttributes() {

				var newAttributes = currentState.newAttributes;

				for ( var i = 0, il = newAttributes.length; i < il; i ++ ) {

					newAttributes[ i ] = 0;

				}

			}

			function enableAttribute( attribute ) {

				enableAttributeAndDivisor( attribute, 0 );

			}

			function enableAttributeAndDivisor( attribute, meshPerAttribute ) {

				var newAttributes = currentState.newAttributes;
				var enabledAttributes = currentState.enabledAttributes;
				var attributeDivisors = currentState.attributeDivisors;

				newAttributes[ attribute ] = 1;

				if ( enabledAttributes[ attribute ] === 0 ) {

					gl.enableVertexAttribArray( attribute );
					enabledAttributes[ attribute ] = 1;

				}

				if ( attributeDivisors[ attribute ] !== meshPerAttribute ) {

					var extension = capabilities.isWebGL2 ? gl : extensions.get( 'ANGLE_instanced_arrays' );

					extension[ capabilities.isWebGL2 ? 'vertexAttribDivisor' : 'vertexAttribDivisorANGLE' ]( attribute, meshPerAttribute );
					attributeDivisors[ attribute ] = meshPerAttribute;

				}

			}

			function disableUnusedAttributes() {

				var newAttributes = currentState.newAttributes;
				var enabledAttributes = currentState.enabledAttributes;

				for ( var i = 0, il = enabledAttributes.length; i < il; i ++ ) {

					if ( enabledAttributes[ i ] !== newAttributes[ i ] ) {

						gl.disableVertexAttribArray( i );
						enabledAttributes[ i ] = 0;

					}

				}

			}

			function vertexAttribPointer( index, size, type, normalized, stride, offset ) {

				if ( capabilities.isWebGL2 === true && ( type === 5124 || type === 5125 ) ) {

					gl.vertexAttribIPointer( index, size, type, stride, offset );

				} else {

					gl.vertexAttribPointer( index, size, type, normalized, stride, offset );

				}

			}

			function setupVertexAttributes( object, material, program, geometry ) {

				if ( capabilities.isWebGL2 === false && ( object.isInstancedMesh || geometry.isInstancedBufferGeometry ) ) {

					if ( extensions.get( 'ANGLE_instanced_arrays' ) === null ) { return; }

				}

				initAttributes();

				var geometryAttributes = geometry.attributes;

				var programAttributes = program.getAttributes();

				var materialDefaultAttributeValues = material.defaultAttributeValues;

				for ( var name in programAttributes ) {

					var programAttribute = programAttributes[ name ];

					if ( programAttribute >= 0 ) {

						var geometryAttribute = geometryAttributes[ name ];

						if ( geometryAttribute !== undefined ) {

							var normalized = geometryAttribute.normalized;
							var size = geometryAttribute.itemSize;

							var attribute = attributes.get( geometryAttribute );

							// TODO Attribute may not be available on context restore

							if ( attribute === undefined ) { continue; }

							var buffer = attribute.buffer;
							var type = attribute.type;
							var bytesPerElement = attribute.bytesPerElement;

							if ( geometryAttribute.isInterleavedBufferAttribute ) {

								var data = geometryAttribute.data;
								var stride = data.stride;
								var offset = geometryAttribute.offset;

								if ( data && data.isInstancedInterleavedBuffer ) {

									enableAttributeAndDivisor( programAttribute, data.meshPerAttribute );

									if ( geometry._maxInstanceCount === undefined ) {

										geometry._maxInstanceCount = data.meshPerAttribute * data.count;

									}

								} else {

									enableAttribute( programAttribute );

								}

								gl.bindBuffer( 34962, buffer );
								vertexAttribPointer( programAttribute, size, type, normalized, stride * bytesPerElement, offset * bytesPerElement );

							} else {

								if ( geometryAttribute.isInstancedBufferAttribute ) {

									enableAttributeAndDivisor( programAttribute, geometryAttribute.meshPerAttribute );

									if ( geometry._maxInstanceCount === undefined ) {

										geometry._maxInstanceCount = geometryAttribute.meshPerAttribute * geometryAttribute.count;

									}

								} else {

									enableAttribute( programAttribute );

								}

								gl.bindBuffer( 34962, buffer );
								vertexAttribPointer( programAttribute, size, type, normalized, 0, 0 );

							}

						} else if ( name === 'instanceMatrix' ) {

							var attribute$1 = attributes.get( object.instanceMatrix );

							// TODO Attribute may not be available on context restore

							if ( attribute$1 === undefined ) { continue; }

							var buffer$1 = attribute$1.buffer;
							var type$1 = attribute$1.type;

							enableAttributeAndDivisor( programAttribute + 0, 1 );
							enableAttributeAndDivisor( programAttribute + 1, 1 );
							enableAttributeAndDivisor( programAttribute + 2, 1 );
							enableAttributeAndDivisor( programAttribute + 3, 1 );

							gl.bindBuffer( 34962, buffer$1 );

							gl.vertexAttribPointer( programAttribute + 0, 4, type$1, false, 64, 0 );
							gl.vertexAttribPointer( programAttribute + 1, 4, type$1, false, 64, 16 );
							gl.vertexAttribPointer( programAttribute + 2, 4, type$1, false, 64, 32 );
							gl.vertexAttribPointer( programAttribute + 3, 4, type$1, false, 64, 48 );

						} else if ( name === 'instanceColor' ) {

							var attribute$2 = attributes.get( object.instanceColor );

							// TODO Attribute may not be available on context restore

							if ( attribute$2 === undefined ) { continue; }

							var buffer$2 = attribute$2.buffer;
							var type$2 = attribute$2.type;

							enableAttributeAndDivisor( programAttribute, 1 );

							gl.bindBuffer( 34962, buffer$2 );

							gl.vertexAttribPointer( programAttribute, 3, type$2, false, 12, 0 );

						} else if ( materialDefaultAttributeValues !== undefined ) {

							var value = materialDefaultAttributeValues[ name ];

							if ( value !== undefined ) {

								switch ( value.length ) {

									case 2:
										gl.vertexAttrib2fv( programAttribute, value );
										break;

									case 3:
										gl.vertexAttrib3fv( programAttribute, value );
										break;

									case 4:
										gl.vertexAttrib4fv( programAttribute, value );
										break;

									default:
										gl.vertexAttrib1fv( programAttribute, value );

								}

							}

						}

					}

				}

				disableUnusedAttributes();

			}

			function dispose() {

				reset();

				for ( var geometryId in bindingStates ) {

					var programMap = bindingStates[ geometryId ];

					for ( var programId in programMap ) {

						var stateMap = programMap[ programId ];

						for ( var wireframe in stateMap ) {

							deleteVertexArrayObject( stateMap[ wireframe ].object );

							delete stateMap[ wireframe ];

						}

						delete programMap[ programId ];

					}

					delete bindingStates[ geometryId ];

				}

			}

			function releaseStatesOfGeometry( geometry ) {

				if ( bindingStates[ geometry.id ] === undefined ) { return; }

				var programMap = bindingStates[ geometry.id ];

				for ( var programId in programMap ) {

					var stateMap = programMap[ programId ];

					for ( var wireframe in stateMap ) {

						deleteVertexArrayObject( stateMap[ wireframe ].object );

						delete stateMap[ wireframe ];

					}

					delete programMap[ programId ];

				}

				delete bindingStates[ geometry.id ];

			}

			function releaseStatesOfProgram( program ) {

				for ( var geometryId in bindingStates ) {

					var programMap = bindingStates[ geometryId ];

					if ( programMap[ program.id ] === undefined ) { continue; }

					var stateMap = programMap[ program.id ];

					for ( var wireframe in stateMap ) {

						deleteVertexArrayObject( stateMap[ wireframe ].object );

						delete stateMap[ wireframe ];

					}

					delete programMap[ program.id ];

				}

			}

			function reset() {

				resetDefaultState();

				if ( currentState === defaultState ) { return; }

				currentState = defaultState;
				bindVertexArrayObject( currentState.object );

			}

			// for backward-compatilibity

			function resetDefaultState() {

				defaultState.geometry = null;
				defaultState.program = null;
				defaultState.wireframe = false;

			}

			return {

				setup: setup,
				reset: reset,
				resetDefaultState: resetDefaultState,
				dispose: dispose,
				releaseStatesOfGeometry: releaseStatesOfGeometry,
				releaseStatesOfProgram: releaseStatesOfProgram,

				initAttributes: initAttributes,
				enableAttribute: enableAttribute,
				disableUnusedAttributes: disableUnusedAttributes

			};

		}

		function WebGLBufferRenderer( gl, extensions, info, capabilities ) {

			var isWebGL2 = capabilities.isWebGL2;

			var mode;

			function setMode( value ) {

				mode = value;

			}

			function render( start, count ) {

				gl.drawArrays( mode, start, count );

				info.update( count, mode, 1 );

			}

			function renderInstances( start, count, primcount ) {

				if ( primcount === 0 ) { return; }

				var extension, methodName;

				if ( isWebGL2 ) {

					extension = gl;
					methodName = 'drawArraysInstanced';

				} else {

					extension = extensions.get( 'ANGLE_instanced_arrays' );
					methodName = 'drawArraysInstancedANGLE';

					if ( extension === null ) {

						console.error( 'THREE.WebGLBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.' );
						return;

					}

				}

				extension[ methodName ]( mode, start, count, primcount );

				info.update( count, mode, primcount );

			}

			//

			this.setMode = setMode;
			this.render = render;
			this.renderInstances = renderInstances;

		}

		function WebGLCapabilities( gl, extensions, parameters ) {

			var maxAnisotropy;

			function getMaxAnisotropy() {

				if ( maxAnisotropy !== undefined ) { return maxAnisotropy; }

				var extension = extensions.get( 'EXT_texture_filter_anisotropic' );

				if ( extension !== null ) {

					maxAnisotropy = gl.getParameter( extension.MAX_TEXTURE_MAX_ANISOTROPY_EXT );

				} else {

					maxAnisotropy = 0;

				}

				return maxAnisotropy;

			}

			function getMaxPrecision( precision ) {

				if ( precision === 'highp' ) {

					if ( gl.getShaderPrecisionFormat( 35633, 36338 ).precision > 0 &&
						gl.getShaderPrecisionFormat( 35632, 36338 ).precision > 0 ) {

						return 'highp';

					}

					precision = 'mediump';

				}

				if ( precision === 'mediump' ) {

					if ( gl.getShaderPrecisionFormat( 35633, 36337 ).precision > 0 &&
						gl.getShaderPrecisionFormat( 35632, 36337 ).precision > 0 ) {

						return 'mediump';

					}

				}

				return 'lowp';

			}

			/* eslint-disable no-undef */
			var isWebGL2 = ( typeof WebGL2RenderingContext !== 'undefined' && gl instanceof WebGL2RenderingContext ) ||
				( typeof WebGL2ComputeRenderingContext !== 'undefined' && gl instanceof WebGL2ComputeRenderingContext );
			/* eslint-enable no-undef */

			var precision = parameters.precision !== undefined ? parameters.precision : 'highp';
			var maxPrecision = getMaxPrecision( precision );

			if ( maxPrecision !== precision ) {

				console.warn( 'THREE.WebGLRenderer:', precision, 'not supported, using', maxPrecision, 'instead.' );
				precision = maxPrecision;

			}

			var logarithmicDepthBuffer = parameters.logarithmicDepthBuffer === true;

			var maxTextures = gl.getParameter( 34930 );
			var maxVertexTextures = gl.getParameter( 35660 );
			var maxTextureSize = gl.getParameter( 3379 );
			var maxCubemapSize = gl.getParameter( 34076 );

			var maxAttributes = gl.getParameter( 34921 );
			var maxVertexUniforms = gl.getParameter( 36347 );
			var maxVaryings = gl.getParameter( 36348 );
			var maxFragmentUniforms = gl.getParameter( 36349 );

			var vertexTextures = maxVertexTextures > 0;
			var floatFragmentTextures = isWebGL2 || !! extensions.get( 'OES_texture_float' );
			var floatVertexTextures = vertexTextures && floatFragmentTextures;

			var maxSamples = isWebGL2 ? gl.getParameter( 36183 ) : 0;

			return {

				isWebGL2: isWebGL2,

				getMaxAnisotropy: getMaxAnisotropy,
				getMaxPrecision: getMaxPrecision,

				precision: precision,
				logarithmicDepthBuffer: logarithmicDepthBuffer,

				maxTextures: maxTextures,
				maxVertexTextures: maxVertexTextures,
				maxTextureSize: maxTextureSize,
				maxCubemapSize: maxCubemapSize,

				maxAttributes: maxAttributes,
				maxVertexUniforms: maxVertexUniforms,
				maxVaryings: maxVaryings,
				maxFragmentUniforms: maxFragmentUniforms,

				vertexTextures: vertexTextures,
				floatFragmentTextures: floatFragmentTextures,
				floatVertexTextures: floatVertexTextures,

				maxSamples: maxSamples

			};

		}

		function WebGLClipping( properties ) {

			var scope = this;

			var globalState = null,
				numGlobalPlanes = 0,
				localClippingEnabled = false,
				renderingShadows = false;

			var plane = new Plane(),
				viewNormalMatrix = new Matrix3(),

				uniform = { value: null, needsUpdate: false };

			this.uniform = uniform;
			this.numPlanes = 0;
			this.numIntersection = 0;

			this.init = function ( planes, enableLocalClipping, camera ) {

				var enabled =
					planes.length !== 0 ||
					enableLocalClipping ||
					// enable state of previous frame - the clipping code has to
					// run another frame in order to reset the state:
					numGlobalPlanes !== 0 ||
					localClippingEnabled;

				localClippingEnabled = enableLocalClipping;

				globalState = projectPlanes( planes, camera, 0 );
				numGlobalPlanes = planes.length;

				return enabled;

			};

			this.beginShadows = function () {

				renderingShadows = true;
				projectPlanes( null );

			};

			this.endShadows = function () {

				renderingShadows = false;
				resetGlobalState();

			};

			this.setState = function ( material, camera, useCache ) {

				var planes = material.clippingPlanes,
					clipIntersection = material.clipIntersection,
					clipShadows = material.clipShadows;

				var materialProperties = properties.get( material );

				if ( ! localClippingEnabled || planes === null || planes.length === 0 || renderingShadows && ! clipShadows ) {

					// there's no local clipping

					if ( renderingShadows ) {

						// there's no global clipping

						projectPlanes( null );

					} else {

						resetGlobalState();

					}

				} else {

					var nGlobal = renderingShadows ? 0 : numGlobalPlanes,
						lGlobal = nGlobal * 4;

					var dstArray = materialProperties.clippingState || null;

					uniform.value = dstArray; // ensure unique state

					dstArray = projectPlanes( planes, camera, lGlobal, useCache );

					for ( var i = 0; i !== lGlobal; ++ i ) {

						dstArray[ i ] = globalState[ i ];

					}

					materialProperties.clippingState = dstArray;
					this.numIntersection = clipIntersection ? this.numPlanes : 0;
					this.numPlanes += nGlobal;

				}


			};

			function resetGlobalState() {

				if ( uniform.value !== globalState ) {

					uniform.value = globalState;
					uniform.needsUpdate = numGlobalPlanes > 0;

				}

				scope.numPlanes = numGlobalPlanes;
				scope.numIntersection = 0;

			}

			function projectPlanes( planes, camera, dstOffset, skipTransform ) {

				var nPlanes = planes !== null ? planes.length : 0;
				var dstArray = null;

				if ( nPlanes !== 0 ) {

					dstArray = uniform.value;

					if ( skipTransform !== true || dstArray === null ) {

						var flatSize = dstOffset + nPlanes * 4,
							viewMatrix = camera.matrixWorldInverse;

						viewNormalMatrix.getNormalMatrix( viewMatrix );

						if ( dstArray === null || dstArray.length < flatSize ) {

							dstArray = new Float32Array( flatSize );

						}

						for ( var i = 0, i4 = dstOffset; i !== nPlanes; ++ i, i4 += 4 ) {

							plane.copy( planes[ i ] ).applyMatrix4( viewMatrix, viewNormalMatrix );

							plane.normal.toArray( dstArray, i4 );
							dstArray[ i4 + 3 ] = plane.constant;

						}

					}

					uniform.value = dstArray;
					uniform.needsUpdate = true;

				}

				scope.numPlanes = nPlanes;
				scope.numIntersection = 0;

				return dstArray;

			}

		}

		function WebGLCubeMaps( renderer ) {

			var cubemaps = new WeakMap();

			function mapTextureMapping( texture, mapping ) {

				if ( mapping === EquirectangularReflectionMapping ) {

					texture.mapping = CubeReflectionMapping;

				} else if ( mapping === EquirectangularRefractionMapping ) {

					texture.mapping = CubeRefractionMapping;

				}

				return texture;

			}

			function get( texture ) {

				if ( texture && texture.isTexture ) {

					var mapping = texture.mapping;

					if ( mapping === EquirectangularReflectionMapping || mapping === EquirectangularRefractionMapping ) {

						if ( cubemaps.has( texture ) ) {

							var cubemap = cubemaps.get( texture ).texture;
							return mapTextureMapping( cubemap, texture.mapping );

						} else {

							var image = texture.image;

							if ( image && image.height > 0 ) {

								var currentRenderList = renderer.getRenderList();
								var currentRenderTarget = renderer.getRenderTarget();
								var currentRenderState = renderer.getRenderState();

								var renderTarget = new WebGLCubeRenderTarget( image.height / 2 );
								renderTarget.fromEquirectangularTexture( renderer, texture );
								cubemaps.set( texture, renderTarget );

								renderer.setRenderTarget( currentRenderTarget );
								renderer.setRenderList( currentRenderList );
								renderer.setRenderState( currentRenderState );

								return mapTextureMapping( renderTarget.texture, texture.mapping );

							} else {

								// image not yet ready. try the conversion next frame

								return null;

							}

						}

					}

				}

				return texture;

			}

			function dispose() {

				cubemaps = new WeakMap();

			}

			return {
				get: get,
				dispose: dispose
			};

		}

		function WebGLExtensions( gl ) {

			var extensions = {};

			return {

				has: function ( name ) {

					if ( extensions[ name ] !== undefined ) {

						return extensions[ name ] !== null;

					}

					var extension;

					switch ( name ) {

						case 'WEBGL_depth_texture':
							extension = gl.getExtension( 'WEBGL_depth_texture' ) || gl.getExtension( 'MOZ_WEBGL_depth_texture' ) || gl.getExtension( 'WEBKIT_WEBGL_depth_texture' );
							break;

						case 'EXT_texture_filter_anisotropic':
							extension = gl.getExtension( 'EXT_texture_filter_anisotropic' ) || gl.getExtension( 'MOZ_EXT_texture_filter_anisotropic' ) || gl.getExtension( 'WEBKIT_EXT_texture_filter_anisotropic' );
							break;

						case 'WEBGL_compressed_texture_s3tc':
							extension = gl.getExtension( 'WEBGL_compressed_texture_s3tc' ) || gl.getExtension( 'MOZ_WEBGL_compressed_texture_s3tc' ) || gl.getExtension( 'WEBKIT_WEBGL_compressed_texture_s3tc' );
							break;

						case 'WEBGL_compressed_texture_pvrtc':
							extension = gl.getExtension( 'WEBGL_compressed_texture_pvrtc' ) || gl.getExtension( 'WEBKIT_WEBGL_compressed_texture_pvrtc' );
							break;

						default:
							extension = gl.getExtension( name );

					}

					extensions[ name ] = extension;

					return extension !== null;

				},

				get: function ( name ) {

					if ( ! this.has( name ) ) {

						console.warn( 'THREE.WebGLRenderer: ' + name + ' extension not supported.' );

					}

					return extensions[ name ];

				}

			};

		}

		function WebGLGeometries( gl, attributes, info, bindingStates ) {

			var geometries = new WeakMap();
			var wireframeAttributes = new WeakMap();

			function onGeometryDispose( event ) {

				var geometry = event.target;
				var buffergeometry = geometries.get( geometry );

				if ( buffergeometry.index !== null ) {

					attributes.remove( buffergeometry.index );

				}

				for ( var name in buffergeometry.attributes ) {

					attributes.remove( buffergeometry.attributes[ name ] );

				}

				geometry.removeEventListener( 'dispose', onGeometryDispose );

				geometries.delete( geometry );

				var attribute = wireframeAttributes.get( buffergeometry );

				if ( attribute ) {

					attributes.remove( attribute );
					wireframeAttributes.delete( buffergeometry );

				}

				bindingStates.releaseStatesOfGeometry( geometry );

				if ( geometry.isInstancedBufferGeometry === true ) {

					delete geometry._maxInstanceCount;

				}

				//

				info.memory.geometries --;

			}

			function get( object, geometry ) {

				var buffergeometry = geometries.get( geometry );

				if ( buffergeometry ) { return buffergeometry; }

				geometry.addEventListener( 'dispose', onGeometryDispose );

				if ( geometry.isBufferGeometry ) {

					buffergeometry = geometry;

				} else if ( geometry.isGeometry ) {

					if ( geometry._bufferGeometry === undefined ) {

						geometry._bufferGeometry = new BufferGeometry().setFromObject( object );

					}

					buffergeometry = geometry._bufferGeometry;

				}

				geometries.set( geometry, buffergeometry );

				info.memory.geometries ++;

				return buffergeometry;

			}

			function update( geometry ) {

				var geometryAttributes = geometry.attributes;

				// Updating index buffer in VAO now. See WebGLBindingStates.

				for ( var name in geometryAttributes ) {

					attributes.update( geometryAttributes[ name ], 34962 );

				}

				// morph targets

				var morphAttributes = geometry.morphAttributes;

				for ( var name$1 in morphAttributes ) {

					var array = morphAttributes[ name$1 ];

					for ( var i = 0, l = array.length; i < l; i ++ ) {

						attributes.update( array[ i ], 34962 );

					}

				}

			}

			function updateWireframeAttribute( geometry ) {

				var indices = [];

				var geometryIndex = geometry.index;
				var geometryPosition = geometry.attributes.position;
				var version = 0;

				if ( geometryIndex !== null ) {

					var array = geometryIndex.array;
					version = geometryIndex.version;

					for ( var i = 0, l = array.length; i < l; i += 3 ) {

						var a = array[ i + 0 ];
						var b = array[ i + 1 ];
						var c = array[ i + 2 ];

						indices.push( a, b, b, c, c, a );

					}

				} else {

					var array$1 = geometryPosition.array;
					version = geometryPosition.version;

					for ( var i$1 = 0, l$1 = ( array$1.length / 3 ) - 1; i$1 < l$1; i$1 += 3 ) {

						var a$1 = i$1 + 0;
						var b$1 = i$1 + 1;
						var c$1 = i$1 + 2;

						indices.push( a$1, b$1, b$1, c$1, c$1, a$1 );

					}

				}

				var attribute = new ( arrayMax( indices ) > 65535 ? Uint32BufferAttribute : Uint16BufferAttribute )( indices, 1 );
				attribute.version = version;

				// Updating index buffer in VAO now. See WebGLBindingStates

				//

				var previousAttribute = wireframeAttributes.get( geometry );

				if ( previousAttribute ) { attributes.remove( previousAttribute ); }

				//

				wireframeAttributes.set( geometry, attribute );

			}

			function getWireframeAttribute( geometry ) {

				var currentAttribute = wireframeAttributes.get( geometry );

				if ( currentAttribute ) {

					var geometryIndex = geometry.index;

					if ( geometryIndex !== null ) {

						// if the attribute is obsolete, create a new one

						if ( currentAttribute.version < geometryIndex.version ) {

							updateWireframeAttribute( geometry );

						}

					}

				} else {

					updateWireframeAttribute( geometry );

				}

				return wireframeAttributes.get( geometry );

			}

			return {

				get: get,
				update: update,

				getWireframeAttribute: getWireframeAttribute

			};

		}

		function WebGLIndexedBufferRenderer( gl, extensions, info, capabilities ) {

			var isWebGL2 = capabilities.isWebGL2;

			var mode;

			function setMode( value ) {

				mode = value;

			}

			var type, bytesPerElement;

			function setIndex( value ) {

				type = value.type;
				bytesPerElement = value.bytesPerElement;

			}

			function render( start, count ) {

				gl.drawElements( mode, count, type, start * bytesPerElement );

				info.update( count, mode, 1 );

			}

			function renderInstances( start, count, primcount ) {

				if ( primcount === 0 ) { return; }

				var extension, methodName;

				if ( isWebGL2 ) {

					extension = gl;
					methodName = 'drawElementsInstanced';

				} else {

					extension = extensions.get( 'ANGLE_instanced_arrays' );
					methodName = 'drawElementsInstancedANGLE';

					if ( extension === null ) {

						console.error( 'THREE.WebGLIndexedBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.' );
						return;

					}

				}

				extension[ methodName ]( mode, count, type, start * bytesPerElement, primcount );

				info.update( count, mode, primcount );

			}

			//

			this.setMode = setMode;
			this.setIndex = setIndex;
			this.render = render;
			this.renderInstances = renderInstances;

		}

		function WebGLInfo( gl ) {

			var memory = {
				geometries: 0,
				textures: 0
			};

			var render = {
				frame: 0,
				calls: 0,
				triangles: 0,
				points: 0,
				lines: 0
			};

			function update( count, mode, instanceCount ) {

				render.calls ++;

				switch ( mode ) {

					case 4:
						render.triangles += instanceCount * ( count / 3 );
						break;

					case 1:
						render.lines += instanceCount * ( count / 2 );
						break;

					case 3:
						render.lines += instanceCount * ( count - 1 );
						break;

					case 2:
						render.lines += instanceCount * count;
						break;

					case 0:
						render.points += instanceCount * count;
						break;

					default:
						console.error( 'THREE.WebGLInfo: Unknown draw mode:', mode );
						break;

				}

			}

			function reset() {

				render.frame ++;
				render.calls = 0;
				render.triangles = 0;
				render.points = 0;
				render.lines = 0;

			}

			return {
				memory: memory,
				render: render,
				programs: null,
				autoReset: true,
				reset: reset,
				update: update
			};

		}

		function numericalSort( a, b ) {

			return a[ 0 ] - b[ 0 ];

		}

		function absNumericalSort( a, b ) {

			return Math.abs( b[ 1 ] ) - Math.abs( a[ 1 ] );

		}

		function WebGLMorphtargets( gl ) {

			var influencesList = {};
			var morphInfluences = new Float32Array( 8 );

			var workInfluences = [];

			for ( var i = 0; i < 8; i ++ ) {

				workInfluences[ i ] = [ i, 0 ];

			}

			function update( object, geometry, material, program ) {

				var objectInfluences = object.morphTargetInfluences;

				// When object doesn't have morph target influences defined, we treat it as a 0-length array
				// This is important to make sure we set up morphTargetBaseInfluence / morphTargetInfluences

				var length = objectInfluences === undefined ? 0 : objectInfluences.length;

				var influences = influencesList[ geometry.id ];

				if ( influences === undefined ) {

					// initialise list

					influences = [];

					for ( var i = 0; i < length; i ++ ) {

						influences[ i ] = [ i, 0 ];

					}

					influencesList[ geometry.id ] = influences;

				}

				// Collect influences

				for ( var i$1 = 0; i$1 < length; i$1 ++ ) {

					var influence = influences[ i$1 ];

					influence[ 0 ] = i$1;
					influence[ 1 ] = objectInfluences[ i$1 ];

				}

				influences.sort( absNumericalSort );

				for ( var i$2 = 0; i$2 < 8; i$2 ++ ) {

					if ( i$2 < length && influences[ i$2 ][ 1 ] ) {

						workInfluences[ i$2 ][ 0 ] = influences[ i$2 ][ 0 ];
						workInfluences[ i$2 ][ 1 ] = influences[ i$2 ][ 1 ];

					} else {

						workInfluences[ i$2 ][ 0 ] = Number.MAX_SAFE_INTEGER;
						workInfluences[ i$2 ][ 1 ] = 0;

					}

				}

				workInfluences.sort( numericalSort );

				var morphTargets = material.morphTargets && geometry.morphAttributes.position;
				var morphNormals = material.morphNormals && geometry.morphAttributes.normal;

				var morphInfluencesSum = 0;

				for ( var i$3 = 0; i$3 < 8; i$3 ++ ) {

					var influence$1 = workInfluences[ i$3 ];
					var index = influence$1[ 0 ];
					var value = influence$1[ 1 ];

					if ( index !== Number.MAX_SAFE_INTEGER && value ) {

						if ( morphTargets && geometry.getAttribute( 'morphTarget' + i$3 ) !== morphTargets[ index ] ) {

							geometry.setAttribute( 'morphTarget' + i$3, morphTargets[ index ] );

						}

						if ( morphNormals && geometry.getAttribute( 'morphNormal' + i$3 ) !== morphNormals[ index ] ) {

							geometry.setAttribute( 'morphNormal' + i$3, morphNormals[ index ] );

						}

						morphInfluences[ i$3 ] = value;
						morphInfluencesSum += value;

					} else {

						if ( morphTargets && geometry.getAttribute( 'morphTarget' + i$3 ) !== undefined ) {

							geometry.deleteAttribute( 'morphTarget' + i$3 );

						}

						if ( morphNormals && geometry.getAttribute( 'morphNormal' + i$3 ) !== undefined ) {

							geometry.deleteAttribute( 'morphNormal' + i$3 );

						}

						morphInfluences[ i$3 ] = 0;

					}

				}

				// GLSL shader uses formula baseinfluence * base + sum(target * influence)
				// This allows us to switch between absolute morphs and relative morphs without changing shader code
				// When baseinfluence = 1 - sum(influence), the above is equivalent to sum((target - base) * influence)
				var morphBaseInfluence = geometry.morphTargetsRelative ? 1 : 1 - morphInfluencesSum;

				program.getUniforms().setValue( gl, 'morphTargetBaseInfluence', morphBaseInfluence );
				program.getUniforms().setValue( gl, 'morphTargetInfluences', morphInfluences );

			}

			return {

				update: update

			};

		}

		function WebGLObjects( gl, geometries, attributes, info ) {

			var updateMap = new WeakMap();

			function update( object ) {

				var frame = info.render.frame;

				var geometry = object.geometry;
				var buffergeometry = geometries.get( object, geometry );

				// Update once per frame

				if ( updateMap.get( buffergeometry ) !== frame ) {

					if ( geometry.isGeometry ) {

						buffergeometry.updateFromObject( object );

					}

					geometries.update( buffergeometry );

					updateMap.set( buffergeometry, frame );

				}

				if ( object.isInstancedMesh ) {

					attributes.update( object.instanceMatrix, 34962 );

					if ( object.instanceColor !== null ) {

						attributes.update( object.instanceColor, 34962 );

					}

				}

				return buffergeometry;

			}

			function dispose() {

				updateMap = new WeakMap();

			}

			return {

				update: update,
				dispose: dispose

			};

		}

		function CubeTexture( images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding ) {

			images = images !== undefined ? images : [];
			mapping = mapping !== undefined ? mapping : CubeReflectionMapping;
			format = format !== undefined ? format : RGBFormat;

			Texture.call( this, images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );

			this.flipY = false;

		}

		CubeTexture.prototype = Object.create( Texture.prototype );
		CubeTexture.prototype.constructor = CubeTexture;

		CubeTexture.prototype.isCubeTexture = true;

		Object.defineProperty( CubeTexture.prototype, 'images', {

			get: function () {

				return this.image;

			},

			set: function ( value ) {

				this.image = value;

			}

		} );

		function DataTexture2DArray( data, width, height, depth ) {

			Texture.call( this, null );

			this.image = { data: data || null, width: width || 1, height: height || 1, depth: depth || 1 };

			this.magFilter = NearestFilter;
			this.minFilter = NearestFilter;

			this.wrapR = ClampToEdgeWrapping;

			this.generateMipmaps = false;
			this.flipY = false;

			this.needsUpdate = true;

		}

		DataTexture2DArray.prototype = Object.create( Texture.prototype );
		DataTexture2DArray.prototype.constructor = DataTexture2DArray;
		DataTexture2DArray.prototype.isDataTexture2DArray = true;

		function DataTexture3D( data, width, height, depth ) {

			// We're going to add .setXXX() methods for setting properties later.
			// Users can still set in DataTexture3D directly.
			//
			//	const texture = new THREE.DataTexture3D( data, width, height, depth );
			// 	texture.anisotropy = 16;
			//
			// See #14839

			Texture.call( this, null );

			this.image = { data: data || null, width: width || 1, height: height || 1, depth: depth || 1 };

			this.magFilter = NearestFilter;
			this.minFilter = NearestFilter;

			this.wrapR = ClampToEdgeWrapping;

			this.generateMipmaps = false;
			this.flipY = false;

			this.needsUpdate = true;


		}

		DataTexture3D.prototype = Object.create( Texture.prototype );
		DataTexture3D.prototype.constructor = DataTexture3D;
		DataTexture3D.prototype.isDataTexture3D = true;

		/**
		 * Uniforms of a program.
		 * Those form a tree structure with a special top-level container for the root,
		 * which you get by calling 'new WebGLUniforms( gl, program )'.
		 *
		 *
		 * Properties of inner nodes including the top-level container:
		 *
		 * .seq - array of nested uniforms
		 * .map - nested uniforms by name
		 *
		 *
		 * Methods of all nodes except the top-level container:
		 *
		 * .setValue( gl, value, [textures] )
		 *
		 * 		uploads a uniform value(s)
		 *  	the 'textures' parameter is needed for sampler uniforms
		 *
		 *
		 * Static methods of the top-level container (textures factorizations):
		 *
		 * .upload( gl, seq, values, textures )
		 *
		 * 		sets uniforms in 'seq' to 'values[id].value'
		 *
		 * .seqWithValue( seq, values ) : filteredSeq
		 *
		 * 		filters 'seq' entries with corresponding entry in values
		 *
		 *
		 * Methods of the top-level container (textures factorizations):
		 *
		 * .setValue( gl, name, value, textures )
		 *
		 * 		sets uniform with  name 'name' to 'value'
		 *
		 * .setOptional( gl, obj, prop )
		 *
		 * 		like .set for an optional property of the object
		 *
		 */

		var emptyTexture = new Texture();
		var emptyTexture2dArray = new DataTexture2DArray();
		var emptyTexture3d = new DataTexture3D();
		var emptyCubeTexture = new CubeTexture();

		// --- Utilities ---

		// Array Caches (provide typed arrays for temporary by size)

		var arrayCacheF32 = [];
		var arrayCacheI32 = [];

		// Float32Array caches used for uploading Matrix uniforms

		var mat4array = new Float32Array( 16 );
		var mat3array = new Float32Array( 9 );
		var mat2array = new Float32Array( 4 );

		// Flattening for arrays of vectors and matrices

		function flatten( array, nBlocks, blockSize ) {

			var firstElem = array[ 0 ];

			if ( firstElem <= 0 || firstElem > 0 ) { return array; }
			// unoptimized: ! isNaN( firstElem )
			// see http://jacksondunstan.com/articles/983

			var n = nBlocks * blockSize;
			var r = arrayCacheF32[ n ];

			if ( r === undefined ) {

				r = new Float32Array( n );
				arrayCacheF32[ n ] = r;

			}

			if ( nBlocks !== 0 ) {

				firstElem.toArray( r, 0 );

				for ( var i = 1, offset = 0; i !== nBlocks; ++ i ) {

					offset += blockSize;
					array[ i ].toArray( r, offset );

				}

			}

			return r;

		}

		function arraysEqual( a, b ) {

			if ( a.length !== b.length ) { return false; }

			for ( var i = 0, l = a.length; i < l; i ++ ) {

				if ( a[ i ] !== b[ i ] ) { return false; }

			}

			return true;

		}

		function copyArray( a, b ) {

			for ( var i = 0, l = b.length; i < l; i ++ ) {

				a[ i ] = b[ i ];

			}

		}

		// Texture unit allocation

		function allocTexUnits( textures, n ) {

			var r = arrayCacheI32[ n ];

			if ( r === undefined ) {

				r = new Int32Array( n );
				arrayCacheI32[ n ] = r;

			}

			for ( var i = 0; i !== n; ++ i ) {

				r[ i ] = textures.allocateTextureUnit();

			}

			return r;

		}

		// --- Setters ---

		// Note: Defining these methods externally, because they come in a bunch
		// and this way their names minify.

		// Single scalar

		function setValueV1f( gl, v ) {

			var cache = this.cache;

			if ( cache[ 0 ] === v ) { return; }

			gl.uniform1f( this.addr, v );

			cache[ 0 ] = v;

		}

		// Single float vector (from flat array or THREE.VectorN)

		function setValueV2f( gl, v ) {

			var cache = this.cache;

			if ( v.x !== undefined ) {

				if ( cache[ 0 ] !== v.x || cache[ 1 ] !== v.y ) {

					gl.uniform2f( this.addr, v.x, v.y );

					cache[ 0 ] = v.x;
					cache[ 1 ] = v.y;

				}

			} else {

				if ( arraysEqual( cache, v ) ) { return; }

				gl.uniform2fv( this.addr, v );

				copyArray( cache, v );

			}

		}

		function setValueV3f( gl, v ) {

			var cache = this.cache;

			if ( v.x !== undefined ) {

				if ( cache[ 0 ] !== v.x || cache[ 1 ] !== v.y || cache[ 2 ] !== v.z ) {

					gl.uniform3f( this.addr, v.x, v.y, v.z );

					cache[ 0 ] = v.x;
					cache[ 1 ] = v.y;
					cache[ 2 ] = v.z;

				}

			} else if ( v.r !== undefined ) {

				if ( cache[ 0 ] !== v.r || cache[ 1 ] !== v.g || cache[ 2 ] !== v.b ) {

					gl.uniform3f( this.addr, v.r, v.g, v.b );

					cache[ 0 ] = v.r;
					cache[ 1 ] = v.g;
					cache[ 2 ] = v.b;

				}

			} else {

				if ( arraysEqual( cache, v ) ) { return; }

				gl.uniform3fv( this.addr, v );

				copyArray( cache, v );

			}

		}

		function setValueV4f( gl, v ) {

			var cache = this.cache;

			if ( v.x !== undefined ) {

				if ( cache[ 0 ] !== v.x || cache[ 1 ] !== v.y || cache[ 2 ] !== v.z || cache[ 3 ] !== v.w ) {

					gl.uniform4f( this.addr, v.x, v.y, v.z, v.w );

					cache[ 0 ] = v.x;
					cache[ 1 ] = v.y;
					cache[ 2 ] = v.z;
					cache[ 3 ] = v.w;

				}

			} else {

				if ( arraysEqual( cache, v ) ) { return; }

				gl.uniform4fv( this.addr, v );

				copyArray( cache, v );

			}

		}

		// Single matrix (from flat array or MatrixN)

		function setValueM2( gl, v ) {

			var cache = this.cache;
			var elements = v.elements;

			if ( elements === undefined ) {

				if ( arraysEqual( cache, v ) ) { return; }

				gl.uniformMatrix2fv( this.addr, false, v );

				copyArray( cache, v );

			} else {

				if ( arraysEqual( cache, elements ) ) { return; }

				mat2array.set( elements );

				gl.uniformMatrix2fv( this.addr, false, mat2array );

				copyArray( cache, elements );

			}

		}

		function setValueM3( gl, v ) {

			var cache = this.cache;
			var elements = v.elements;

			if ( elements === undefined ) {

				if ( arraysEqual( cache, v ) ) { return; }

				gl.uniformMatrix3fv( this.addr, false, v );

				copyArray( cache, v );

			} else {

				if ( arraysEqual( cache, elements ) ) { return; }

				mat3array.set( elements );

				gl.uniformMatrix3fv( this.addr, false, mat3array );

				copyArray( cache, elements );

			}

		}

		function setValueM4( gl, v ) {

			var cache = this.cache;
			var elements = v.elements;

			if ( elements === undefined ) {

				if ( arraysEqual( cache, v ) ) { return; }

				gl.uniformMatrix4fv( this.addr, false, v );

				copyArray( cache, v );

			} else {

				if ( arraysEqual( cache, elements ) ) { return; }

				mat4array.set( elements );

				gl.uniformMatrix4fv( this.addr, false, mat4array );

				copyArray( cache, elements );

			}

		}

		// Single texture (2D / Cube)

		function setValueT1( gl, v, textures ) {

			var cache = this.cache;
			var unit = textures.allocateTextureUnit();

			if ( cache[ 0 ] !== unit ) {

				gl.uniform1i( this.addr, unit );
				cache[ 0 ] = unit;

			}

			textures.safeSetTexture2D( v || emptyTexture, unit );

		}

		function setValueT2DArray1( gl, v, textures ) {

			var cache = this.cache;
			var unit = textures.allocateTextureUnit();

			if ( cache[ 0 ] !== unit ) {

				gl.uniform1i( this.addr, unit );
				cache[ 0 ] = unit;

			}

			textures.setTexture2DArray( v || emptyTexture2dArray, unit );

		}

		function setValueT3D1( gl, v, textures ) {

			var cache = this.cache;
			var unit = textures.allocateTextureUnit();

			if ( cache[ 0 ] !== unit ) {

				gl.uniform1i( this.addr, unit );
				cache[ 0 ] = unit;

			}

			textures.setTexture3D( v || emptyTexture3d, unit );

		}

		function setValueT6( gl, v, textures ) {

			var cache = this.cache;
			var unit = textures.allocateTextureUnit();

			if ( cache[ 0 ] !== unit ) {

				gl.uniform1i( this.addr, unit );
				cache[ 0 ] = unit;

			}

			textures.safeSetTextureCube( v || emptyCubeTexture, unit );

		}

		// Integer / Boolean vectors or arrays thereof (always flat arrays)

		function setValueV1i( gl, v ) {

			var cache = this.cache;

			if ( cache[ 0 ] === v ) { return; }

			gl.uniform1i( this.addr, v );

			cache[ 0 ] = v;

		}

		function setValueV2i( gl, v ) {

			var cache = this.cache;

			if ( arraysEqual( cache, v ) ) { return; }

			gl.uniform2iv( this.addr, v );

			copyArray( cache, v );

		}

		function setValueV3i( gl, v ) {

			var cache = this.cache;

			if ( arraysEqual( cache, v ) ) { return; }

			gl.uniform3iv( this.addr, v );

			copyArray( cache, v );

		}

		function setValueV4i( gl, v ) {

			var cache = this.cache;

			if ( arraysEqual( cache, v ) ) { return; }

			gl.uniform4iv( this.addr, v );

			copyArray( cache, v );

		}

		// uint

		function setValueV1ui( gl, v ) {

			var cache = this.cache;

			if ( cache[ 0 ] === v ) { return; }

			gl.uniform1ui( this.addr, v );

			cache[ 0 ] = v;

		}

		// Helper to pick the right setter for the singular case

		function getSingularSetter( type ) {

			switch ( type ) {

				case 0x1406: return setValueV1f; // FLOAT
				case 0x8b50: return setValueV2f; // _VEC2
				case 0x8b51: return setValueV3f; // _VEC3
				case 0x8b52: return setValueV4f; // _VEC4

				case 0x8b5a: return setValueM2; // _MAT2
				case 0x8b5b: return setValueM3; // _MAT3
				case 0x8b5c: return setValueM4; // _MAT4

				case 0x1404: case 0x8b56: return setValueV1i; // INT, BOOL
				case 0x8b53: case 0x8b57: return setValueV2i; // _VEC2
				case 0x8b54: case 0x8b58: return setValueV3i; // _VEC3
				case 0x8b55: case 0x8b59: return setValueV4i; // _VEC4

				case 0x1405: return setValueV1ui; // UINT

				case 0x8b5e: // SAMPLER_2D
				case 0x8d66: // SAMPLER_EXTERNAL_OES
				case 0x8dca: // INT_SAMPLER_2D
				case 0x8dd2: // UNSIGNED_INT_SAMPLER_2D
				case 0x8b62: // SAMPLER_2D_SHADOW
					return setValueT1;

				case 0x8b5f: // SAMPLER_3D
				case 0x8dcb: // INT_SAMPLER_3D
				case 0x8dd3: // UNSIGNED_INT_SAMPLER_3D
					return setValueT3D1;

				case 0x8b60: // SAMPLER_CUBE
				case 0x8dcc: // INT_SAMPLER_CUBE
				case 0x8dd4: // UNSIGNED_INT_SAMPLER_CUBE
				case 0x8dc5: // SAMPLER_CUBE_SHADOW
					return setValueT6;

				case 0x8dc1: // SAMPLER_2D_ARRAY
				case 0x8dcf: // INT_SAMPLER_2D_ARRAY
				case 0x8dd7: // UNSIGNED_INT_SAMPLER_2D_ARRAY
				case 0x8dc4: // SAMPLER_2D_ARRAY_SHADOW
					return setValueT2DArray1;

			}

		}

		// Array of scalars
		function setValueV1fArray( gl, v ) {

			gl.uniform1fv( this.addr, v );

		}

		// Integer / Boolean vectors or arrays thereof (always flat arrays)
		function setValueV1iArray( gl, v ) {

			gl.uniform1iv( this.addr, v );

		}

		function setValueV2iArray( gl, v ) {

			gl.uniform2iv( this.addr, v );

		}

		function setValueV3iArray( gl, v ) {

			gl.uniform3iv( this.addr, v );

		}

		function setValueV4iArray( gl, v ) {

			gl.uniform4iv( this.addr, v );

		}


		// Array of vectors (flat or from THREE classes)

		function setValueV2fArray( gl, v ) {

			var data = flatten( v, this.size, 2 );

			gl.uniform2fv( this.addr, data );

		}

		function setValueV3fArray( gl, v ) {

			var data = flatten( v, this.size, 3 );

			gl.uniform3fv( this.addr, data );

		}

		function setValueV4fArray( gl, v ) {

			var data = flatten( v, this.size, 4 );

			gl.uniform4fv( this.addr, data );

		}

		// Array of matrices (flat or from THREE clases)

		function setValueM2Array( gl, v ) {

			var data = flatten( v, this.size, 4 );

			gl.uniformMatrix2fv( this.addr, false, data );

		}

		function setValueM3Array( gl, v ) {

			var data = flatten( v, this.size, 9 );

			gl.uniformMatrix3fv( this.addr, false, data );

		}

		function setValueM4Array( gl, v ) {

			var data = flatten( v, this.size, 16 );

			gl.uniformMatrix4fv( this.addr, false, data );

		}

		// Array of textures (2D / Cube)

		function setValueT1Array( gl, v, textures ) {

			var n = v.length;

			var units = allocTexUnits( textures, n );

			gl.uniform1iv( this.addr, units );

			for ( var i = 0; i !== n; ++ i ) {

				textures.safeSetTexture2D( v[ i ] || emptyTexture, units[ i ] );

			}

		}

		function setValueT6Array( gl, v, textures ) {

			var n = v.length;

			var units = allocTexUnits( textures, n );

			gl.uniform1iv( this.addr, units );

			for ( var i = 0; i !== n; ++ i ) {

				textures.safeSetTextureCube( v[ i ] || emptyCubeTexture, units[ i ] );

			}

		}

		// Helper to pick the right setter for a pure (bottom-level) array

		function getPureArraySetter( type ) {

			switch ( type ) {

				case 0x1406: return setValueV1fArray; // FLOAT
				case 0x8b50: return setValueV2fArray; // _VEC2
				case 0x8b51: return setValueV3fArray; // _VEC3
				case 0x8b52: return setValueV4fArray; // _VEC4

				case 0x8b5a: return setValueM2Array; // _MAT2
				case 0x8b5b: return setValueM3Array; // _MAT3
				case 0x8b5c: return setValueM4Array; // _MAT4

				case 0x1404: case 0x8b56: return setValueV1iArray; // INT, BOOL
				case 0x8b53: case 0x8b57: return setValueV2iArray; // _VEC2
				case 0x8b54: case 0x8b58: return setValueV3iArray; // _VEC3
				case 0x8b55: case 0x8b59: return setValueV4iArray; // _VEC4

				case 0x8b5e: // SAMPLER_2D
				case 0x8d66: // SAMPLER_EXTERNAL_OES
				case 0x8dca: // INT_SAMPLER_2D
				case 0x8dd2: // UNSIGNED_INT_SAMPLER_2D
				case 0x8b62: // SAMPLER_2D_SHADOW
					return setValueT1Array;

				case 0x8b60: // SAMPLER_CUBE
				case 0x8dcc: // INT_SAMPLER_CUBE
				case 0x8dd4: // UNSIGNED_INT_SAMPLER_CUBE
				case 0x8dc5: // SAMPLER_CUBE_SHADOW
					return setValueT6Array;

			}

		}

		// --- Uniform Classes ---

		function SingleUniform( id, activeInfo, addr ) {

			this.id = id;
			this.addr = addr;
			this.cache = [];
			this.setValue = getSingularSetter( activeInfo.type );

			// this.path = activeInfo.name; // DEBUG

		}

		function PureArrayUniform( id, activeInfo, addr ) {

			this.id = id;
			this.addr = addr;
			this.cache = [];
			this.size = activeInfo.size;
			this.setValue = getPureArraySetter( activeInfo.type );

			// this.path = activeInfo.name; // DEBUG

		}

		PureArrayUniform.prototype.updateCache = function ( data ) {

			var cache = this.cache;

			if ( data instanceof Float32Array && cache.length !== data.length ) {

				this.cache = new Float32Array( data.length );

			}

			copyArray( cache, data );

		};

		function StructuredUniform( id ) {

			this.id = id;

			this.seq = [];
			this.map = {};

		}

		StructuredUniform.prototype.setValue = function ( gl, value, textures ) {

			var seq = this.seq;

			for ( var i = 0, n = seq.length; i !== n; ++ i ) {

				var u = seq[ i ];
				u.setValue( gl, value[ u.id ], textures );

			}

		};

		// --- Top-level ---

		// Parser - builds up the property tree from the path strings

		var RePathPart = /([\w\d_]+)(\])?(\[|\.)?/g;

		// extracts
		// 	- the identifier (member name or array index)
		//  - followed by an optional right bracket (found when array index)
		//  - followed by an optional left bracket or dot (type of subscript)
		//
		// Note: These portions can be read in a non-overlapping fashion and
		// allow straightforward parsing of the hierarchy that WebGL encodes
		// in the uniform names.

		function addUniform( container, uniformObject ) {

			container.seq.push( uniformObject );
			container.map[ uniformObject.id ] = uniformObject;

		}

		function parseUniform( activeInfo, addr, container ) {

			var path = activeInfo.name,
				pathLength = path.length;

			// reset RegExp object, because of the early exit of a previous run
			RePathPart.lastIndex = 0;

			while ( true ) {

				var match = RePathPart.exec( path ),
					matchEnd = RePathPart.lastIndex;

				var id = match[ 1 ];
				var idIsIndex = match[ 2 ] === ']',
					subscript = match[ 3 ];

				if ( idIsIndex ) { id = id | 0; } // convert to integer

				if ( subscript === undefined || subscript === '[' && matchEnd + 2 === pathLength ) {

					// bare name or "pure" bottom-level array "[0]" suffix

					addUniform( container, subscript === undefined ?
						new SingleUniform( id, activeInfo, addr ) :
						new PureArrayUniform( id, activeInfo, addr ) );

					break;

				} else {

					// step into inner node / create it in case it doesn't exist

					var map = container.map;
					var next = map[ id ];

					if ( next === undefined ) {

						next = new StructuredUniform( id );
						addUniform( container, next );

					}

					container = next;

				}

			}

		}

		// Root Container

		function WebGLUniforms( gl, program ) {

			this.seq = [];
			this.map = {};

			var n = gl.getProgramParameter( program, 35718 );

			for ( var i = 0; i < n; ++ i ) {

				var info = gl.getActiveUniform( program, i ),
					addr = gl.getUniformLocation( program, info.name );

				parseUniform( info, addr, this );

			}

		}

		WebGLUniforms.prototype.setValue = function ( gl, name, value, textures ) {

			var u = this.map[ name ];

			if ( u !== undefined ) { u.setValue( gl, value, textures ); }

		};

		WebGLUniforms.prototype.setOptional = function ( gl, object, name ) {

			var v = object[ name ];

			if ( v !== undefined ) { this.setValue( gl, name, v ); }

		};


		// Static interface

		WebGLUniforms.upload = function ( gl, seq, values, textures ) {

			for ( var i = 0, n = seq.length; i !== n; ++ i ) {

				var u = seq[ i ],
					v = values[ u.id ];

				if ( v.needsUpdate !== false ) {

					// note: always updating when .needsUpdate is undefined
					u.setValue( gl, v.value, textures );

				}

			}

		};

		WebGLUniforms.seqWithValue = function ( seq, values ) {

			var r = [];

			for ( var i = 0, n = seq.length; i !== n; ++ i ) {

				var u = seq[ i ];
				if ( u.id in values ) { r.push( u ); }

			}

			return r;

		};

		function WebGLShader( gl, type, string ) {

			var shader = gl.createShader( type );

			gl.shaderSource( shader, string );
			gl.compileShader( shader );

			return shader;

		}

		var programIdCount = 0;

		function addLineNumbers( string ) {

			var lines = string.split( '\n' );

			for ( var i = 0; i < lines.length; i ++ ) {

				lines[ i ] = ( i + 1 ) + ': ' + lines[ i ];

			}

			return lines.join( '\n' );

		}

		function getEncodingComponents( encoding ) {

			switch ( encoding ) {

				case LinearEncoding:
					return [ 'Linear', '( value )' ];
				case sRGBEncoding:
					return [ 'sRGB', '( value )' ];
				case RGBEEncoding:
					return [ 'RGBE', '( value )' ];
				case RGBM7Encoding:
					return [ 'RGBM', '( value, 7.0 )' ];
				case RGBM16Encoding:
					return [ 'RGBM', '( value, 16.0 )' ];
				case RGBDEncoding:
					return [ 'RGBD', '( value, 256.0 )' ];
				case GammaEncoding:
					return [ 'Gamma', '( value, float( GAMMA_FACTOR ) )' ];
				case LogLuvEncoding:
					return [ 'LogLuv', '( value )' ];
				default:
					console.warn( 'THREE.WebGLProgram: Unsupported encoding:', encoding );
					return [ 'Linear', '( value )' ];

			}

		}

		function getShaderErrors( gl, shader, type ) {

			var status = gl.getShaderParameter( shader, 35713 );
			var log = gl.getShaderInfoLog( shader ).trim();

			if ( status && log === '' ) { return ''; }

			// --enable-privileged-webgl-extension
			// console.log( '**' + type + '**', gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( shader ) );

			var source = gl.getShaderSource( shader );

			return 'THREE.WebGLShader: gl.getShaderInfoLog() ' + type + '\n' + log + addLineNumbers( source );

		}

		function getTexelDecodingFunction( functionName, encoding ) {

			var components = getEncodingComponents( encoding );
			return 'vec4 ' + functionName + '( vec4 value ) { return ' + components[ 0 ] + 'ToLinear' + components[ 1 ] + '; }';

		}

		function getTexelEncodingFunction( functionName, encoding ) {

			var components = getEncodingComponents( encoding );
			return 'vec4 ' + functionName + '( vec4 value ) { return LinearTo' + components[ 0 ] + components[ 1 ] + '; }';

		}

		function getToneMappingFunction( functionName, toneMapping ) {

			var toneMappingName;

			switch ( toneMapping ) {

				case LinearToneMapping:
					toneMappingName = 'Linear';
					break;

				case ReinhardToneMapping:
					toneMappingName = 'Reinhard';
					break;

				case CineonToneMapping:
					toneMappingName = 'OptimizedCineon';
					break;

				case ACESFilmicToneMapping:
					toneMappingName = 'ACESFilmic';
					break;

				case CustomToneMapping:
					toneMappingName = 'Custom';
					break;

				default:
					console.warn( 'THREE.WebGLProgram: Unsupported toneMapping:', toneMapping );
					toneMappingName = 'Linear';

			}

			return 'vec3 ' + functionName + '( vec3 color ) { return ' + toneMappingName + 'ToneMapping( color ); }';

		}

		function generateExtensions( parameters ) {

			var chunks = [
				( parameters.extensionDerivatives || parameters.envMapCubeUV || parameters.bumpMap || parameters.tangentSpaceNormalMap || parameters.clearcoatNormalMap || parameters.flatShading || parameters.shaderID === 'physical' ) ? '#extension GL_OES_standard_derivatives : enable' : '',
				( parameters.extensionFragDepth || parameters.logarithmicDepthBuffer ) && parameters.rendererExtensionFragDepth ? '#extension GL_EXT_frag_depth : enable' : '',
				( parameters.extensionDrawBuffers && parameters.rendererExtensionDrawBuffers ) ? '#extension GL_EXT_draw_buffers : require' : '',
				( parameters.extensionShaderTextureLOD || parameters.envMap ) && parameters.rendererExtensionShaderTextureLod ? '#extension GL_EXT_shader_texture_lod : enable' : ''
			];

			return chunks.filter( filterEmptyLine ).join( '\n' );

		}

		function generateDefines( defines ) {

			var chunks = [];

			for ( var name in defines ) {

				var value = defines[ name ];

				if ( value === false ) { continue; }

				chunks.push( '#define ' + name + ' ' + value );

			}

			return chunks.join( '\n' );

		}

		function fetchAttributeLocations( gl, program ) {

			var attributes = {};

			var n = gl.getProgramParameter( program, 35721 );

			for ( var i = 0; i < n; i ++ ) {

				var info = gl.getActiveAttrib( program, i );
				var name = info.name;

				// console.log( 'THREE.WebGLProgram: ACTIVE VERTEX ATTRIBUTE:', name, i );

				attributes[ name ] = gl.getAttribLocation( program, name );

			}

			return attributes;

		}

		function filterEmptyLine( string ) {

			return string !== '';

		}

		function replaceLightNums( string, parameters ) {

			return string
				.replace( /NUM_DIR_LIGHTS/g, parameters.numDirLights )
				.replace( /NUM_SPOT_LIGHTS/g, parameters.numSpotLights )
				.replace( /NUM_RECT_AREA_LIGHTS/g, parameters.numRectAreaLights )
				.replace( /NUM_POINT_LIGHTS/g, parameters.numPointLights )
				.replace( /NUM_HEMI_LIGHTS/g, parameters.numHemiLights )
				.replace( /NUM_DIR_LIGHT_SHADOWS/g, parameters.numDirLightShadows )
				.replace( /NUM_SPOT_LIGHT_SHADOWS/g, parameters.numSpotLightShadows )
				.replace( /NUM_POINT_LIGHT_SHADOWS/g, parameters.numPointLightShadows );

		}

		function replaceClippingPlaneNums( string, parameters ) {

			return string
				.replace( /NUM_CLIPPING_PLANES/g, parameters.numClippingPlanes )
				.replace( /UNION_CLIPPING_PLANES/g, ( parameters.numClippingPlanes - parameters.numClipIntersection ) );

		}

		// Resolve Includes

		var includePattern = /^[ \t]*#include +<([\w\d./]+)>/gm;

		function resolveIncludes( string ) {

			return string.replace( includePattern, includeReplacer );

		}

		function includeReplacer( match, include ) {

			var string = ShaderChunk[ include ];

			if ( string === undefined ) {

				throw new Error( 'Can not resolve #include <' + include + '>' );

			}

			return resolveIncludes( string );

		}

		// Unroll Loops

		var deprecatedUnrollLoopPattern = /#pragma unroll_loop[\s]+?for \( int i \= (\d+)\; i < (\d+)\; i \+\+ \) \{([\s\S]+?)(?=\})\}/g;
		var unrollLoopPattern = /#pragma unroll_loop_start\s+for\s*\(\s*int\s+i\s*=\s*(\d+)\s*;\s*i\s*<\s*(\d+)\s*;\s*i\s*\+\+\s*\)\s*{([\s\S]+?)}\s+#pragma unroll_loop_end/g;

		function unrollLoops( string ) {

			return string
				.replace( unrollLoopPattern, loopReplacer )
				.replace( deprecatedUnrollLoopPattern, deprecatedLoopReplacer );

		}

		function deprecatedLoopReplacer( match, start, end, snippet ) {

			console.warn( 'WebGLProgram: #pragma unroll_loop shader syntax is deprecated. Please use #pragma unroll_loop_start syntax instead.' );
			return loopReplacer( match, start, end, snippet );

		}

		function loopReplacer( match, start, end, snippet ) {

			var string = '';

			for ( var i = parseInt( start ); i < parseInt( end ); i ++ ) {

				string += snippet
					.replace( /\[\s*i\s*\]/g, '[ ' + i + ' ]' )
					.replace( /UNROLLED_LOOP_INDEX/g, i );

			}

			return string;

		}

		//

		function generatePrecision( parameters ) {

			var precisionstring = "precision " + parameters.precision + " float;\nprecision " + parameters.precision + " int;";

			if ( parameters.precision === "highp" ) {

				precisionstring += "\n#define HIGH_PRECISION";

			} else if ( parameters.precision === "mediump" ) {

				precisionstring += "\n#define MEDIUM_PRECISION";

			} else if ( parameters.precision === "lowp" ) {

				precisionstring += "\n#define LOW_PRECISION";

			}

			return precisionstring;

		}

		function generateShadowMapTypeDefine( parameters ) {

			var shadowMapTypeDefine = 'SHADOWMAP_TYPE_BASIC';

			if ( parameters.shadowMapType === PCFShadowMap ) {

				shadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF';

			} else if ( parameters.shadowMapType === PCFSoftShadowMap ) {

				shadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF_SOFT';

			} else if ( parameters.shadowMapType === VSMShadowMap ) {

				shadowMapTypeDefine = 'SHADOWMAP_TYPE_VSM';

			}

			return shadowMapTypeDefine;

		}

		function generateEnvMapTypeDefine( parameters ) {

			var envMapTypeDefine = 'ENVMAP_TYPE_CUBE';

			if ( parameters.envMap ) {

				switch ( parameters.envMapMode ) {

					case CubeReflectionMapping:
					case CubeRefractionMapping:
						envMapTypeDefine = 'ENVMAP_TYPE_CUBE';
						break;

					case CubeUVReflectionMapping:
					case CubeUVRefractionMapping:
						envMapTypeDefine = 'ENVMAP_TYPE_CUBE_UV';
						break;

				}

			}

			return envMapTypeDefine;

		}

		function generateEnvMapModeDefine( parameters ) {

			var envMapModeDefine = 'ENVMAP_MODE_REFLECTION';

			if ( parameters.envMap ) {

				switch ( parameters.envMapMode ) {

					case CubeRefractionMapping:
					case CubeUVRefractionMapping:

						envMapModeDefine = 'ENVMAP_MODE_REFRACTION';
						break;

				}

			}

			return envMapModeDefine;

		}

		function generateEnvMapBlendingDefine( parameters ) {

			var envMapBlendingDefine = 'ENVMAP_BLENDING_NONE';

			if ( parameters.envMap ) {

				switch ( parameters.combine ) {

					case MultiplyOperation:
						envMapBlendingDefine = 'ENVMAP_BLENDING_MULTIPLY';
						break;

					case MixOperation:
						envMapBlendingDefine = 'ENVMAP_BLENDING_MIX';
						break;

					case AddOperation:
						envMapBlendingDefine = 'ENVMAP_BLENDING_ADD';
						break;

				}

			}

			return envMapBlendingDefine;

		}

		function WebGLProgram( renderer, cacheKey, parameters, bindingStates ) {

			var gl = renderer.getContext();

			var defines = parameters.defines;

			var vertexShader = parameters.vertexShader;
			var fragmentShader = parameters.fragmentShader;

			var shadowMapTypeDefine = generateShadowMapTypeDefine( parameters );
			var envMapTypeDefine = generateEnvMapTypeDefine( parameters );
			var envMapModeDefine = generateEnvMapModeDefine( parameters );
			var envMapBlendingDefine = generateEnvMapBlendingDefine( parameters );


			var gammaFactorDefine = ( renderer.gammaFactor > 0 ) ? renderer.gammaFactor : 1.0;

			var customExtensions = parameters.isWebGL2 ? '' : generateExtensions( parameters );

			var customDefines = generateDefines( defines );

			var program = gl.createProgram();

			var prefixVertex, prefixFragment;
			var versionString = parameters.glslVersion ? '#version ' + parameters.glslVersion + "\n" : '';

			if ( parameters.isRawShaderMaterial ) {

				prefixVertex = [

					customDefines

				].filter( filterEmptyLine ).join( '\n' );

				if ( prefixVertex.length > 0 ) {

					prefixVertex += '\n';

				}

				prefixFragment = [

					customExtensions,
					customDefines

				].filter( filterEmptyLine ).join( '\n' );

				if ( prefixFragment.length > 0 ) {

					prefixFragment += '\n';

				}

			} else {

				prefixVertex = [

					generatePrecision( parameters ),

					'#define SHADER_NAME ' + parameters.shaderName,

					customDefines,

					parameters.instancing ? '#define USE_INSTANCING' : '',
					parameters.instancingColor ? '#define USE_INSTANCING_COLOR' : '',

					parameters.supportsVertexTextures ? '#define VERTEX_TEXTURES' : '',

					'#define GAMMA_FACTOR ' + gammaFactorDefine,

					'#define MAX_BONES ' + parameters.maxBones,
					( parameters.useFog && parameters.fog ) ? '#define USE_FOG' : '',
					( parameters.useFog && parameters.fogExp2 ) ? '#define FOG_EXP2' : '',

					parameters.map ? '#define USE_MAP' : '',
					parameters.envMap ? '#define USE_ENVMAP' : '',
					parameters.envMap ? '#define ' + envMapModeDefine : '',
					parameters.lightMap ? '#define USE_LIGHTMAP' : '',
					parameters.aoMap ? '#define USE_AOMAP' : '',
					parameters.emissiveMap ? '#define USE_EMISSIVEMAP' : '',
					parameters.bumpMap ? '#define USE_BUMPMAP' : '',
					parameters.normalMap ? '#define USE_NORMALMAP' : '',
					( parameters.normalMap && parameters.objectSpaceNormalMap ) ? '#define OBJECTSPACE_NORMALMAP' : '',
					( parameters.normalMap && parameters.tangentSpaceNormalMap ) ? '#define TANGENTSPACE_NORMALMAP' : '',

					parameters.clearcoatMap ? '#define USE_CLEARCOATMAP' : '',
					parameters.clearcoatRoughnessMap ? '#define USE_CLEARCOAT_ROUGHNESSMAP' : '',
					parameters.clearcoatNormalMap ? '#define USE_CLEARCOAT_NORMALMAP' : '',
					parameters.displacementMap && parameters.supportsVertexTextures ? '#define USE_DISPLACEMENTMAP' : '',
					parameters.specularMap ? '#define USE_SPECULARMAP' : '',
					parameters.roughnessMap ? '#define USE_ROUGHNESSMAP' : '',
					parameters.metalnessMap ? '#define USE_METALNESSMAP' : '',
					parameters.alphaMap ? '#define USE_ALPHAMAP' : '',
					parameters.transmissionMap ? '#define USE_TRANSMISSIONMAP' : '',

					parameters.vertexTangents ? '#define USE_TANGENT' : '',
					parameters.vertexColors ? '#define USE_COLOR' : '',
					parameters.vertexUvs ? '#define USE_UV' : '',
					parameters.uvsVertexOnly ? '#define UVS_VERTEX_ONLY' : '',

					parameters.flatShading ? '#define FLAT_SHADED' : '',

					parameters.skinning ? '#define USE_SKINNING' : '',
					parameters.useVertexTexture ? '#define BONE_TEXTURE' : '',

					parameters.morphTargets ? '#define USE_MORPHTARGETS' : '',
					parameters.morphNormals && parameters.flatShading === false ? '#define USE_MORPHNORMALS' : '',
					parameters.doubleSided ? '#define DOUBLE_SIDED' : '',
					parameters.flipSided ? '#define FLIP_SIDED' : '',

					parameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '',
					parameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '',

					parameters.sizeAttenuation ? '#define USE_SIZEATTENUATION' : '',

					parameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '',
					( parameters.logarithmicDepthBuffer && parameters.rendererExtensionFragDepth ) ? '#define USE_LOGDEPTHBUF_EXT' : '',

					'uniform mat4 modelMatrix;',
					'uniform mat4 modelViewMatrix;',
					'uniform mat4 projectionMatrix;',
					'uniform mat4 viewMatrix;',
					'uniform mat3 normalMatrix;',
					'uniform vec3 cameraPosition;',
					'uniform bool isOrthographic;',

					'#ifdef USE_INSTANCING',

					'	attribute mat4 instanceMatrix;',

					'#endif',

					'#ifdef USE_INSTANCING_COLOR',

					'	attribute vec3 instanceColor;',

					'#endif',

					'attribute vec3 position;',
					'attribute vec3 normal;',
					'attribute vec2 uv;',

					'#ifdef USE_TANGENT',

					'	attribute vec4 tangent;',

					'#endif',

					'#ifdef USE_COLOR',

					'	attribute vec3 color;',

					'#endif',

					'#ifdef USE_MORPHTARGETS',

					'	attribute vec3 morphTarget0;',
					'	attribute vec3 morphTarget1;',
					'	attribute vec3 morphTarget2;',
					'	attribute vec3 morphTarget3;',

					'	#ifdef USE_MORPHNORMALS',

					'		attribute vec3 morphNormal0;',
					'		attribute vec3 morphNormal1;',
					'		attribute vec3 morphNormal2;',
					'		attribute vec3 morphNormal3;',

					'	#else',

					'		attribute vec3 morphTarget4;',
					'		attribute vec3 morphTarget5;',
					'		attribute vec3 morphTarget6;',
					'		attribute vec3 morphTarget7;',

					'	#endif',

					'#endif',

					'#ifdef USE_SKINNING',

					'	attribute vec4 skinIndex;',
					'	attribute vec4 skinWeight;',

					'#endif',

					'\n'

				].filter( filterEmptyLine ).join( '\n' );

				prefixFragment = [

					customExtensions,

					generatePrecision( parameters ),

					'#define SHADER_NAME ' + parameters.shaderName,

					customDefines,

					parameters.alphaTest ? '#define ALPHATEST ' + parameters.alphaTest + ( parameters.alphaTest % 1 ? '' : '.0' ) : '', // add '.0' if integer

					'#define GAMMA_FACTOR ' + gammaFactorDefine,

					( parameters.useFog && parameters.fog ) ? '#define USE_FOG' : '',
					( parameters.useFog && parameters.fogExp2 ) ? '#define FOG_EXP2' : '',

					parameters.map ? '#define USE_MAP' : '',
					parameters.matcap ? '#define USE_MATCAP' : '',
					parameters.envMap ? '#define USE_ENVMAP' : '',
					parameters.envMap ? '#define ' + envMapTypeDefine : '',
					parameters.envMap ? '#define ' + envMapModeDefine : '',
					parameters.envMap ? '#define ' + envMapBlendingDefine : '',
					parameters.lightMap ? '#define USE_LIGHTMAP' : '',
					parameters.aoMap ? '#define USE_AOMAP' : '',
					parameters.emissiveMap ? '#define USE_EMISSIVEMAP' : '',
					parameters.bumpMap ? '#define USE_BUMPMAP' : '',
					parameters.normalMap ? '#define USE_NORMALMAP' : '',
					( parameters.normalMap && parameters.objectSpaceNormalMap ) ? '#define OBJECTSPACE_NORMALMAP' : '',
					( parameters.normalMap && parameters.tangentSpaceNormalMap ) ? '#define TANGENTSPACE_NORMALMAP' : '',
					parameters.clearcoatMap ? '#define USE_CLEARCOATMAP' : '',
					parameters.clearcoatRoughnessMap ? '#define USE_CLEARCOAT_ROUGHNESSMAP' : '',
					parameters.clearcoatNormalMap ? '#define USE_CLEARCOAT_NORMALMAP' : '',
					parameters.specularMap ? '#define USE_SPECULARMAP' : '',
					parameters.roughnessMap ? '#define USE_ROUGHNESSMAP' : '',
					parameters.metalnessMap ? '#define USE_METALNESSMAP' : '',
					parameters.alphaMap ? '#define USE_ALPHAMAP' : '',

					parameters.sheen ? '#define USE_SHEEN' : '',
					parameters.transmissionMap ? '#define USE_TRANSMISSIONMAP' : '',

					parameters.vertexTangents ? '#define USE_TANGENT' : '',
					parameters.vertexColors || parameters.instancingColor ? '#define USE_COLOR' : '',
					parameters.vertexUvs ? '#define USE_UV' : '',
					parameters.uvsVertexOnly ? '#define UVS_VERTEX_ONLY' : '',

					parameters.gradientMap ? '#define USE_GRADIENTMAP' : '',

					parameters.flatShading ? '#define FLAT_SHADED' : '',

					parameters.doubleSided ? '#define DOUBLE_SIDED' : '',
					parameters.flipSided ? '#define FLIP_SIDED' : '',

					parameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '',
					parameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '',

					parameters.premultipliedAlpha ? '#define PREMULTIPLIED_ALPHA' : '',

					parameters.physicallyCorrectLights ? '#define PHYSICALLY_CORRECT_LIGHTS' : '',

					parameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '',
					( parameters.logarithmicDepthBuffer && parameters.rendererExtensionFragDepth ) ? '#define USE_LOGDEPTHBUF_EXT' : '',

					( ( parameters.extensionShaderTextureLOD || parameters.envMap ) && parameters.rendererExtensionShaderTextureLod ) ? '#define TEXTURE_LOD_EXT' : '',

					'uniform mat4 viewMatrix;',
					'uniform vec3 cameraPosition;',
					'uniform bool isOrthographic;',

					( parameters.toneMapping !== NoToneMapping ) ? '#define TONE_MAPPING' : '',
					( parameters.toneMapping !== NoToneMapping ) ? ShaderChunk[ 'tonemapping_pars_fragment' ] : '', // this code is required here because it is used by the toneMapping() function defined below
					( parameters.toneMapping !== NoToneMapping ) ? getToneMappingFunction( 'toneMapping', parameters.toneMapping ) : '',

					parameters.dithering ? '#define DITHERING' : '',

					ShaderChunk[ 'encodings_pars_fragment' ], // this code is required here because it is used by the various encoding/decoding function defined below
					parameters.map ? getTexelDecodingFunction( 'mapTexelToLinear', parameters.mapEncoding ) : '',
					parameters.matcap ? getTexelDecodingFunction( 'matcapTexelToLinear', parameters.matcapEncoding ) : '',
					parameters.envMap ? getTexelDecodingFunction( 'envMapTexelToLinear', parameters.envMapEncoding ) : '',
					parameters.emissiveMap ? getTexelDecodingFunction( 'emissiveMapTexelToLinear', parameters.emissiveMapEncoding ) : '',
					parameters.lightMap ? getTexelDecodingFunction( 'lightMapTexelToLinear', parameters.lightMapEncoding ) : '',
					getTexelEncodingFunction( 'linearToOutputTexel', parameters.outputEncoding ),

					parameters.depthPacking ? '#define DEPTH_PACKING ' + parameters.depthPacking : '',

					'\n'

				].filter( filterEmptyLine ).join( '\n' );

			}

			vertexShader = resolveIncludes( vertexShader );
			vertexShader = replaceLightNums( vertexShader, parameters );
			vertexShader = replaceClippingPlaneNums( vertexShader, parameters );

			fragmentShader = resolveIncludes( fragmentShader );
			fragmentShader = replaceLightNums( fragmentShader, parameters );
			fragmentShader = replaceClippingPlaneNums( fragmentShader, parameters );

			vertexShader = unrollLoops( vertexShader );
			fragmentShader = unrollLoops( fragmentShader );

			if ( parameters.isWebGL2 && parameters.isRawShaderMaterial !== true ) {

				// GLSL 3.0 conversion for built-in materials and ShaderMaterial

				versionString = '#version 300 es\n';

				prefixVertex = [
					'#define attribute in',
					'#define varying out',
					'#define texture2D texture'
				].join( '\n' ) + '\n' + prefixVertex;

				prefixFragment = [
					'#define varying in',
					( parameters.glslVersion === GLSL3 ) ? '' : 'out highp vec4 pc_fragColor;',
					( parameters.glslVersion === GLSL3 ) ? '' : '#define gl_FragColor pc_fragColor',
					'#define gl_FragDepthEXT gl_FragDepth',
					'#define texture2D texture',
					'#define textureCube texture',
					'#define texture2DProj textureProj',
					'#define texture2DLodEXT textureLod',
					'#define texture2DProjLodEXT textureProjLod',
					'#define textureCubeLodEXT textureLod',
					'#define texture2DGradEXT textureGrad',
					'#define texture2DProjGradEXT textureProjGrad',
					'#define textureCubeGradEXT textureGrad'
				].join( '\n' ) + '\n' + prefixFragment;

			}

			var vertexGlsl = versionString + prefixVertex + vertexShader;
			var fragmentGlsl = versionString + prefixFragment + fragmentShader;

			// console.log( '*VERTEX*', vertexGlsl );
			// console.log( '*FRAGMENT*', fragmentGlsl );

			var glVertexShader = WebGLShader( gl, 35633, vertexGlsl );
			var glFragmentShader = WebGLShader( gl, 35632, fragmentGlsl );

			gl.attachShader( program, glVertexShader );
			gl.attachShader( program, glFragmentShader );

			// Force a particular attribute to index 0.

			if ( parameters.index0AttributeName !== undefined ) {

				gl.bindAttribLocation( program, 0, parameters.index0AttributeName );

			} else if ( parameters.morphTargets === true ) {

				// programs with morphTargets displace position out of attribute 0
				gl.bindAttribLocation( program, 0, 'position' );

			}

			gl.linkProgram( program );

			// check for link errors
			if ( renderer.debug.checkShaderErrors ) {

				var programLog = gl.getProgramInfoLog( program ).trim();
				var vertexLog = gl.getShaderInfoLog( glVertexShader ).trim();
				var fragmentLog = gl.getShaderInfoLog( glFragmentShader ).trim();

				var runnable = true;
				var haveDiagnostics = true;

				if ( gl.getProgramParameter( program, 35714 ) === false ) {

					runnable = false;

					var vertexErrors = getShaderErrors( gl, glVertexShader, 'vertex' );
					var fragmentErrors = getShaderErrors( gl, glFragmentShader, 'fragment' );

					console.error( 'THREE.WebGLProgram: shader error: ', gl.getError(), '35715', gl.getProgramParameter( program, 35715 ), 'gl.getProgramInfoLog', programLog, vertexErrors, fragmentErrors );

				} else if ( programLog !== '' ) {

					console.warn( 'THREE.WebGLProgram: gl.getProgramInfoLog()', programLog );

				} else if ( vertexLog === '' || fragmentLog === '' ) {

					haveDiagnostics = false;

				}

				if ( haveDiagnostics ) {

					this.diagnostics = {

						runnable: runnable,

						programLog: programLog,

						vertexShader: {

							log: vertexLog,
							prefix: prefixVertex

						},

						fragmentShader: {

							log: fragmentLog,
							prefix: prefixFragment

						}

					};

				}

			}

			// Clean up

			// Crashes in iOS9 and iOS10. #18402
			// gl.detachShader( program, glVertexShader );
			// gl.detachShader( program, glFragmentShader );

			gl.deleteShader( glVertexShader );
			gl.deleteShader( glFragmentShader );

			// set up caching for uniform locations

			var cachedUniforms;

			this.getUniforms = function () {

				if ( cachedUniforms === undefined ) {

					cachedUniforms = new WebGLUniforms( gl, program );

				}

				return cachedUniforms;

			};

			// set up caching for attribute locations

			var cachedAttributes;

			this.getAttributes = function () {

				if ( cachedAttributes === undefined ) {

					cachedAttributes = fetchAttributeLocations( gl, program );

				}

				return cachedAttributes;

			};

			// free resource

			this.destroy = function () {

				bindingStates.releaseStatesOfProgram( this );

				gl.deleteProgram( program );
				this.program = undefined;

			};

			//

			this.name = parameters.shaderName;
			this.id = programIdCount ++;
			this.cacheKey = cacheKey;
			this.usedTimes = 1;
			this.program = program;
			this.vertexShader = glVertexShader;
			this.fragmentShader = glFragmentShader;

			return this;

		}

		function WebGLPrograms( renderer, cubemaps, extensions, capabilities, bindingStates, clipping ) {

			var programs = [];

			var isWebGL2 = capabilities.isWebGL2;
			var logarithmicDepthBuffer = capabilities.logarithmicDepthBuffer;
			var floatVertexTextures = capabilities.floatVertexTextures;
			var maxVertexUniforms = capabilities.maxVertexUniforms;
			var vertexTextures = capabilities.vertexTextures;

			var precision = capabilities.precision;

			var shaderIDs = {
				MeshDepthMaterial: 'depth',
				MeshDistanceMaterial: 'distanceRGBA',
				MeshNormalMaterial: 'normal',
				MeshBasicMaterial: 'basic',
				MeshLambertMaterial: 'lambert',
				MeshPhongMaterial: 'phong',
				MeshToonMaterial: 'toon',
				MeshStandardMaterial: 'physical',
				MeshPhysicalMaterial: 'physical',
				MeshMatcapMaterial: 'matcap',
				LineBasicMaterial: 'basic',
				LineDashedMaterial: 'dashed',
				PointsMaterial: 'points',
				ShadowMaterial: 'shadow',
				SpriteMaterial: 'sprite'
			};

			var parameterNames = [
				"precision", "isWebGL2", "supportsVertexTextures", "outputEncoding", "instancing", "instancingColor",
				"map", "mapEncoding", "matcap", "matcapEncoding", "envMap", "envMapMode", "envMapEncoding", "envMapCubeUV",
				"lightMap", "lightMapEncoding", "aoMap", "emissiveMap", "emissiveMapEncoding", "bumpMap", "normalMap", "objectSpaceNormalMap", "tangentSpaceNormalMap", "clearcoatMap", "clearcoatRoughnessMap", "clearcoatNormalMap", "displacementMap", "specularMap",
				"roughnessMap", "metalnessMap", "gradientMap",
				"alphaMap", "combine", "vertexColors", "vertexTangents", "vertexUvs", "uvsVertexOnly", "fog", "useFog", "fogExp2",
				"flatShading", "sizeAttenuation", "logarithmicDepthBuffer", "skinning",
				"maxBones", "useVertexTexture", "morphTargets", "morphNormals",
				"maxMorphTargets", "maxMorphNormals", "premultipliedAlpha",
				"numDirLights", "numPointLights", "numSpotLights", "numHemiLights", "numRectAreaLights",
				"numDirLightShadows", "numPointLightShadows", "numSpotLightShadows",
				"shadowMapEnabled", "shadowMapType", "toneMapping", 'physicallyCorrectLights',
				"alphaTest", "doubleSided", "flipSided", "numClippingPlanes", "numClipIntersection", "depthPacking", "dithering",
				"sheen", "transmissionMap"
			];

			function getMaxBones( object ) {

				var skeleton = object.skeleton;
				var bones = skeleton.bones;

				if ( floatVertexTextures ) {

					return 1024;

				} else {

					// default for when object is not specified
					// ( for example when prebuilding shader to be used with multiple objects )
					//
					//  - leave some extra space for other uniforms
					//  - limit here is ANGLE's 254 max uniform vectors
					//    (up to 54 should be safe)

					var nVertexUniforms = maxVertexUniforms;
					var nVertexMatrices = Math.floor( ( nVertexUniforms - 20 ) / 4 );

					var maxBones = Math.min( nVertexMatrices, bones.length );

					if ( maxBones < bones.length ) {

						console.warn( 'THREE.WebGLRenderer: Skeleton has ' + bones.length + ' bones. This GPU supports ' + maxBones + '.' );
						return 0;

					}

					return maxBones;

				}

			}

			function getTextureEncodingFromMap( map ) {

				var encoding;

				if ( ! map ) {

					encoding = LinearEncoding;

				} else if ( map.isTexture ) {

					encoding = map.encoding;

				} else if ( map.isWebGLRenderTarget ) {

					console.warn( "THREE.WebGLPrograms.getTextureEncodingFromMap: don't use render targets as textures. Use their .texture property instead." );
					encoding = map.texture.encoding;

				}

				return encoding;

			}

			function getParameters( material, lights, shadows, scene, object ) {

				var fog = scene.fog;
				var environment = material.isMeshStandardMaterial ? scene.environment : null;

				var envMap = cubemaps.get( material.envMap || environment );

				var shaderID = shaderIDs[ material.type ];

				// heuristics to create shader parameters according to lights in the scene
				// (not to blow over maxLights budget)

				var maxBones = object.isSkinnedMesh ? getMaxBones( object ) : 0;

				if ( material.precision !== null ) {

					precision = capabilities.getMaxPrecision( material.precision );

					if ( precision !== material.precision ) {

						console.warn( 'THREE.WebGLProgram.getParameters:', material.precision, 'not supported, using', precision, 'instead.' );

					}

				}

				var vertexShader, fragmentShader;

				if ( shaderID ) {

					var shader = ShaderLib[ shaderID ];

					vertexShader = shader.vertexShader;
					fragmentShader = shader.fragmentShader;

				} else {

					vertexShader = material.vertexShader;
					fragmentShader = material.fragmentShader;

				}

				var currentRenderTarget = renderer.getRenderTarget();

				var parameters = {

					isWebGL2: isWebGL2,

					shaderID: shaderID,
					shaderName: material.type,

					vertexShader: vertexShader,
					fragmentShader: fragmentShader,
					defines: material.defines,

					isRawShaderMaterial: material.isRawShaderMaterial === true,
					glslVersion: material.glslVersion,

					precision: precision,

					instancing: object.isInstancedMesh === true,
					instancingColor: object.isInstancedMesh === true && object.instanceColor !== null,

					supportsVertexTextures: vertexTextures,
					outputEncoding: ( currentRenderTarget !== null ) ? getTextureEncodingFromMap( currentRenderTarget.texture ) : renderer.outputEncoding,
					map: !! material.map,
					mapEncoding: getTextureEncodingFromMap( material.map ),
					matcap: !! material.matcap,
					matcapEncoding: getTextureEncodingFromMap( material.matcap ),
					envMap: !! envMap,
					envMapMode: envMap && envMap.mapping,
					envMapEncoding: getTextureEncodingFromMap( envMap ),
					envMapCubeUV: ( !! envMap ) && ( ( envMap.mapping === CubeUVReflectionMapping ) || ( envMap.mapping === CubeUVRefractionMapping ) ),
					lightMap: !! material.lightMap,
					lightMapEncoding: getTextureEncodingFromMap( material.lightMap ),
					aoMap: !! material.aoMap,
					emissiveMap: !! material.emissiveMap,
					emissiveMapEncoding: getTextureEncodingFromMap( material.emissiveMap ),
					bumpMap: !! material.bumpMap,
					normalMap: !! material.normalMap,
					objectSpaceNormalMap: material.normalMapType === ObjectSpaceNormalMap,
					tangentSpaceNormalMap: material.normalMapType === TangentSpaceNormalMap,
					clearcoatMap: !! material.clearcoatMap,
					clearcoatRoughnessMap: !! material.clearcoatRoughnessMap,
					clearcoatNormalMap: !! material.clearcoatNormalMap,
					displacementMap: !! material.displacementMap,
					roughnessMap: !! material.roughnessMap,
					metalnessMap: !! material.metalnessMap,
					specularMap: !! material.specularMap,
					alphaMap: !! material.alphaMap,

					gradientMap: !! material.gradientMap,

					sheen: !! material.sheen,

					transmissionMap: !! material.transmissionMap,

					combine: material.combine,

					vertexTangents: ( material.normalMap && material.vertexTangents ),
					vertexColors: material.vertexColors,
					vertexUvs: !! material.map || !! material.bumpMap || !! material.normalMap || !! material.specularMap || !! material.alphaMap || !! material.emissiveMap || !! material.roughnessMap || !! material.metalnessMap || !! material.clearcoatMap || !! material.clearcoatRoughnessMap || !! material.clearcoatNormalMap || !! material.displacementMap || !! material.transmissionMap,
					uvsVertexOnly: ! ( !! material.map || !! material.bumpMap || !! material.normalMap || !! material.specularMap || !! material.alphaMap || !! material.emissiveMap || !! material.roughnessMap || !! material.metalnessMap || !! material.clearcoatNormalMap || !! material.transmissionMap ) && !! material.displacementMap,

					fog: !! fog,
					useFog: material.fog,
					fogExp2: ( fog && fog.isFogExp2 ),

					flatShading: material.flatShading,

					sizeAttenuation: material.sizeAttenuation,
					logarithmicDepthBuffer: logarithmicDepthBuffer,

					skinning: material.skinning && maxBones > 0,
					maxBones: maxBones,
					useVertexTexture: floatVertexTextures,

					morphTargets: material.morphTargets,
					morphNormals: material.morphNormals,
					maxMorphTargets: renderer.maxMorphTargets,
					maxMorphNormals: renderer.maxMorphNormals,

					numDirLights: lights.directional.length,
					numPointLights: lights.point.length,
					numSpotLights: lights.spot.length,
					numRectAreaLights: lights.rectArea.length,
					numHemiLights: lights.hemi.length,

					numDirLightShadows: lights.directionalShadowMap.length,
					numPointLightShadows: lights.pointShadowMap.length,
					numSpotLightShadows: lights.spotShadowMap.length,

					numClippingPlanes: clipping.numPlanes,
					numClipIntersection: clipping.numIntersection,

					dithering: material.dithering,

					shadowMapEnabled: renderer.shadowMap.enabled && shadows.length > 0,
					shadowMapType: renderer.shadowMap.type,

					toneMapping: material.toneMapped ? renderer.toneMapping : NoToneMapping,
					physicallyCorrectLights: renderer.physicallyCorrectLights,

					premultipliedAlpha: material.premultipliedAlpha,

					alphaTest: material.alphaTest,
					doubleSided: material.side === DoubleSide,
					flipSided: material.side === BackSide,

					depthPacking: ( material.depthPacking !== undefined ) ? material.depthPacking : false,

					index0AttributeName: material.index0AttributeName,

					extensionDerivatives: material.extensions && material.extensions.derivatives,
					extensionFragDepth: material.extensions && material.extensions.fragDepth,
					extensionDrawBuffers: material.extensions && material.extensions.drawBuffers,
					extensionShaderTextureLOD: material.extensions && material.extensions.shaderTextureLOD,

					rendererExtensionFragDepth: isWebGL2 || extensions.has( 'EXT_frag_depth' ),
					rendererExtensionDrawBuffers: isWebGL2 || extensions.has( 'WEBGL_draw_buffers' ),
					rendererExtensionShaderTextureLod: isWebGL2 || extensions.has( 'EXT_shader_texture_lod' ),

					customProgramCacheKey: material.customProgramCacheKey()

				};

				return parameters;

			}

			function getProgramCacheKey( parameters ) {

				var array = [];

				if ( parameters.shaderID ) {

					array.push( parameters.shaderID );

				} else {

					array.push( parameters.fragmentShader );
					array.push( parameters.vertexShader );

				}

				if ( parameters.defines !== undefined ) {

					for ( var name in parameters.defines ) {

						array.push( name );
						array.push( parameters.defines[ name ] );

					}

				}

				if ( parameters.isRawShaderMaterial === false ) {

					for ( var i = 0; i < parameterNames.length; i ++ ) {

						array.push( parameters[ parameterNames[ i ] ] );

					}

					array.push( renderer.outputEncoding );
					array.push( renderer.gammaFactor );

				}

				array.push( parameters.customProgramCacheKey );

				return array.join();

			}

			function getUniforms( material ) {

				var shaderID = shaderIDs[ material.type ];
				var uniforms;

				if ( shaderID ) {

					var shader = ShaderLib[ shaderID ];
					uniforms = UniformsUtils.clone( shader.uniforms );

				} else {

					uniforms = material.uniforms;

				}

				return uniforms;

			}

			function acquireProgram( parameters, cacheKey ) {

				var program;

				// Check if code has been already compiled
				for ( var p = 0, pl = programs.length; p < pl; p ++ ) {

					var preexistingProgram = programs[ p ];

					if ( preexistingProgram.cacheKey === cacheKey ) {

						program = preexistingProgram;
						++ program.usedTimes;

						break;

					}

				}

				if ( program === undefined ) {

					program = new WebGLProgram( renderer, cacheKey, parameters, bindingStates );
					programs.push( program );

				}

				return program;

			}

			function releaseProgram( program ) {

				if ( -- program.usedTimes === 0 ) {

					// Remove from unordered set
					var i = programs.indexOf( program );
					programs[ i ] = programs[ programs.length - 1 ];
					programs.pop();

					// Free WebGL resources
					program.destroy();

				}

			}

			return {
				getParameters: getParameters,
				getProgramCacheKey: getProgramCacheKey,
				getUniforms: getUniforms,
				acquireProgram: acquireProgram,
				releaseProgram: releaseProgram,
				// Exposed for resource monitoring & error feedback via renderer.info:
				programs: programs
			};

		}

		function WebGLProperties() {

			var properties = new WeakMap();

			function get( object ) {

				var map = properties.get( object );

				if ( map === undefined ) {

					map = {};
					properties.set( object, map );

				}

				return map;

			}

			function remove( object ) {

				properties.delete( object );

			}

			function update( object, key, value ) {

				properties.get( object )[ key ] = value;

			}

			function dispose() {

				properties = new WeakMap();

			}

			return {
				get: get,
				remove: remove,
				update: update,
				dispose: dispose
			};

		}

		function painterSortStable( a, b ) {

			if ( a.groupOrder !== b.groupOrder ) {

				return a.groupOrder - b.groupOrder;

			} else if ( a.renderOrder !== b.renderOrder ) {

				return a.renderOrder - b.renderOrder;

			} else if ( a.program !== b.program ) {

				return a.program.id - b.program.id;

			} else if ( a.material.id !== b.material.id ) {

				return a.material.id - b.material.id;

			} else if ( a.z !== b.z ) {

				return a.z - b.z;

			} else {

				return a.id - b.id;

			}

		}

		function reversePainterSortStable( a, b ) {

			if ( a.groupOrder !== b.groupOrder ) {

				return a.groupOrder - b.groupOrder;

			} else if ( a.renderOrder !== b.renderOrder ) {

				return a.renderOrder - b.renderOrder;

			} else if ( a.z !== b.z ) {

				return b.z - a.z;

			} else {

				return a.id - b.id;

			}

		}


		function WebGLRenderList( properties ) {

			var renderItems = [];
			var renderItemsIndex = 0;

			var opaque = [];
			var transparent = [];

			var defaultProgram = { id: - 1 };

			function init() {

				renderItemsIndex = 0;

				opaque.length = 0;
				transparent.length = 0;

			}

			function getNextRenderItem( object, geometry, material, groupOrder, z, group ) {

				var renderItem = renderItems[ renderItemsIndex ];
				var materialProperties = properties.get( material );

				if ( renderItem === undefined ) {

					renderItem = {
						id: object.id,
						object: object,
						geometry: geometry,
						material: material,
						program: materialProperties.program || defaultProgram,
						groupOrder: groupOrder,
						renderOrder: object.renderOrder,
						z: z,
						group: group
					};

					renderItems[ renderItemsIndex ] = renderItem;

				} else {

					renderItem.id = object.id;
					renderItem.object = object;
					renderItem.geometry = geometry;
					renderItem.material = material;
					renderItem.program = materialProperties.program || defaultProgram;
					renderItem.groupOrder = groupOrder;
					renderItem.renderOrder = object.renderOrder;
					renderItem.z = z;
					renderItem.group = group;

				}

				renderItemsIndex ++;

				return renderItem;

			}

			function push( object, geometry, material, groupOrder, z, group ) {

				var renderItem = getNextRenderItem( object, geometry, material, groupOrder, z, group );

				( material.transparent === true ? transparent : opaque ).push( renderItem );

			}

			function unshift( object, geometry, material, groupOrder, z, group ) {

				var renderItem = getNextRenderItem( object, geometry, material, groupOrder, z, group );

				( material.transparent === true ? transparent : opaque ).unshift( renderItem );

			}

			function sort( customOpaqueSort, customTransparentSort ) {

				if ( opaque.length > 1 ) { opaque.sort( customOpaqueSort || painterSortStable ); }
				if ( transparent.length > 1 ) { transparent.sort( customTransparentSort || reversePainterSortStable ); }

			}

			function finish() {

				// Clear references from inactive renderItems in the list

				for ( var i = renderItemsIndex, il = renderItems.length; i < il; i ++ ) {

					var renderItem = renderItems[ i ];

					if ( renderItem.id === null ) { break; }

					renderItem.id = null;
					renderItem.object = null;
					renderItem.geometry = null;
					renderItem.material = null;
					renderItem.program = null;
					renderItem.group = null;

				}

			}

			return {

				opaque: opaque,
				transparent: transparent,

				init: init,
				push: push,
				unshift: unshift,
				finish: finish,

				sort: sort
			};

		}

		function WebGLRenderLists( properties ) {

			var lists = new WeakMap();

			function get( scene, camera ) {

				var cameras = lists.get( scene );
				var list;

				if ( cameras === undefined ) {

					list = new WebGLRenderList( properties );
					lists.set( scene, new WeakMap() );
					lists.get( scene ).set( camera, list );

				} else {

					list = cameras.get( camera );
					if ( list === undefined ) {

						list = new WebGLRenderList( properties );
						cameras.set( camera, list );

					}

				}

				return list;

			}

			function dispose() {

				lists = new WeakMap();

			}

			return {
				get: get,
				dispose: dispose
			};

		}

		function UniformsCache() {

			var lights = {};

			return {

				get: function ( light ) {

					if ( lights[ light.id ] !== undefined ) {

						return lights[ light.id ];

					}

					var uniforms;

					switch ( light.type ) {

						case 'DirectionalLight':
							uniforms = {
								direction: new Vector3(),
								color: new Color()
							};
							break;

						case 'SpotLight':
							uniforms = {
								position: new Vector3(),
								direction: new Vector3(),
								color: new Color(),
								distance: 0,
								coneCos: 0,
								penumbraCos: 0,
								decay: 0
							};
							break;

						case 'PointLight':
							uniforms = {
								position: new Vector3(),
								color: new Color(),
								distance: 0,
								decay: 0
							};
							break;

						case 'HemisphereLight':
							uniforms = {
								direction: new Vector3(),
								skyColor: new Color(),
								groundColor: new Color()
							};
							break;

						case 'RectAreaLight':
							uniforms = {
								color: new Color(),
								position: new Vector3(),
								halfWidth: new Vector3(),
								halfHeight: new Vector3()
							};
							break;

					}

					lights[ light.id ] = uniforms;

					return uniforms;

				}

			};

		}

		function ShadowUniformsCache() {

			var lights = {};

			return {

				get: function ( light ) {

					if ( lights[ light.id ] !== undefined ) {

						return lights[ light.id ];

					}

					var uniforms;

					switch ( light.type ) {

						case 'DirectionalLight':
							uniforms = {
								shadowBias: 0,
								shadowNormalBias: 0,
								shadowRadius: 1,
								shadowMapSize: new Vector2()
							};
							break;

						case 'SpotLight':
							uniforms = {
								shadowBias: 0,
								shadowNormalBias: 0,
								shadowRadius: 1,
								shadowMapSize: new Vector2()
							};
							break;

						case 'PointLight':
							uniforms = {
								shadowBias: 0,
								shadowNormalBias: 0,
								shadowRadius: 1,
								shadowMapSize: new Vector2(),
								shadowCameraNear: 1,
								shadowCameraFar: 1000
							};
							break;

						// TODO (abelnation): set RectAreaLight shadow uniforms

					}

					lights[ light.id ] = uniforms;

					return uniforms;

				}

			};

		}



		var nextVersion = 0;

		function shadowCastingLightsFirst( lightA, lightB ) {

			return ( lightB.castShadow ? 1 : 0 ) - ( lightA.castShadow ? 1 : 0 );

		}

		function WebGLLights() {

			var cache = new UniformsCache();

			var shadowCache = ShadowUniformsCache();

			var state = {

				version: 0,

				hash: {
					directionalLength: - 1,
					pointLength: - 1,
					spotLength: - 1,
					rectAreaLength: - 1,
					hemiLength: - 1,

					numDirectionalShadows: - 1,
					numPointShadows: - 1,
					numSpotShadows: - 1
				},

				ambient: [ 0, 0, 0 ],
				probe: [],
				directional: [],
				directionalShadow: [],
				directionalShadowMap: [],
				directionalShadowMatrix: [],
				spot: [],
				spotShadow: [],
				spotShadowMap: [],
				spotShadowMatrix: [],
				rectArea: [],
				rectAreaLTC1: null,
				rectAreaLTC2: null,
				point: [],
				pointShadow: [],
				pointShadowMap: [],
				pointShadowMatrix: [],
				hemi: []

			};

			for ( var i = 0; i < 9; i ++ ) { state.probe.push( new Vector3() ); }

			var vector3 = new Vector3();
			var matrix4 = new Matrix4();
			var matrix42 = new Matrix4();

			function setup( lights, shadows, camera ) {

				var r = 0, g = 0, b = 0;

				for ( var i = 0; i < 9; i ++ ) { state.probe[ i ].set( 0, 0, 0 ); }

				var directionalLength = 0;
				var pointLength = 0;
				var spotLength = 0;
				var rectAreaLength = 0;
				var hemiLength = 0;

				var numDirectionalShadows = 0;
				var numPointShadows = 0;
				var numSpotShadows = 0;

				var viewMatrix = camera.matrixWorldInverse;

				lights.sort( shadowCastingLightsFirst );

				for ( var i$1 = 0, l = lights.length; i$1 < l; i$1 ++ ) {

					var light = lights[ i$1 ];

					var color = light.color;
					var intensity = light.intensity;
					var distance = light.distance;

					var shadowMap = ( light.shadow && light.shadow.map ) ? light.shadow.map.texture : null;

					if ( light.isAmbientLight ) {

						r += color.r * intensity;
						g += color.g * intensity;
						b += color.b * intensity;

					} else if ( light.isLightProbe ) {

						for ( var j = 0; j < 9; j ++ ) {

							state.probe[ j ].addScaledVector( light.sh.coefficients[ j ], intensity );

						}

					} else if ( light.isDirectionalLight ) {

						var uniforms = cache.get( light );

						uniforms.color.copy( light.color ).multiplyScalar( light.intensity );
						uniforms.direction.setFromMatrixPosition( light.matrixWorld );
						vector3.setFromMatrixPosition( light.target.matrixWorld );
						uniforms.direction.sub( vector3 );
						uniforms.direction.transformDirection( viewMatrix );

						if ( light.castShadow ) {

							var shadow = light.shadow;

							var shadowUniforms = shadowCache.get( light );

							shadowUniforms.shadowBias = shadow.bias;
							shadowUniforms.shadowNormalBias = shadow.normalBias;
							shadowUniforms.shadowRadius = shadow.radius;
							shadowUniforms.shadowMapSize = shadow.mapSize;

							state.directionalShadow[ directionalLength ] = shadowUniforms;
							state.directionalShadowMap[ directionalLength ] = shadowMap;
							state.directionalShadowMatrix[ directionalLength ] = light.shadow.matrix;

							numDirectionalShadows ++;

						}

						state.directional[ directionalLength ] = uniforms;

						directionalLength ++;

					} else if ( light.isSpotLight ) {

						var uniforms$1 = cache.get( light );

						uniforms$1.position.setFromMatrixPosition( light.matrixWorld );
						uniforms$1.position.applyMatrix4( viewMatrix );

						uniforms$1.color.copy( color ).multiplyScalar( intensity );
						uniforms$1.distance = distance;

						uniforms$1.direction.setFromMatrixPosition( light.matrixWorld );
						vector3.setFromMatrixPosition( light.target.matrixWorld );
						uniforms$1.direction.sub( vector3 );
						uniforms$1.direction.transformDirection( viewMatrix );

						uniforms$1.coneCos = Math.cos( light.angle );
						uniforms$1.penumbraCos = Math.cos( light.angle * ( 1 - light.penumbra ) );
						uniforms$1.decay = light.decay;

						if ( light.castShadow ) {

							var shadow$1 = light.shadow;

							var shadowUniforms$1 = shadowCache.get( light );

							shadowUniforms$1.shadowBias = shadow$1.bias;
							shadowUniforms$1.shadowNormalBias = shadow$1.normalBias;
							shadowUniforms$1.shadowRadius = shadow$1.radius;
							shadowUniforms$1.shadowMapSize = shadow$1.mapSize;

							state.spotShadow[ spotLength ] = shadowUniforms$1;
							state.spotShadowMap[ spotLength ] = shadowMap;
							state.spotShadowMatrix[ spotLength ] = light.shadow.matrix;

							numSpotShadows ++;

						}

						state.spot[ spotLength ] = uniforms$1;

						spotLength ++;

					} else if ( light.isRectAreaLight ) {

						var uniforms$2 = cache.get( light );

						// (a) intensity is the total visible light emitted
						//uniforms.color.copy( color ).multiplyScalar( intensity / ( light.width * light.height * Math.PI ) );

						// (b) intensity is the brightness of the light
						uniforms$2.color.copy( color ).multiplyScalar( intensity );

						uniforms$2.position.setFromMatrixPosition( light.matrixWorld );
						uniforms$2.position.applyMatrix4( viewMatrix );

						// extract local rotation of light to derive width/height half vectors
						matrix42.identity();
						matrix4.copy( light.matrixWorld );
						matrix4.premultiply( viewMatrix );
						matrix42.extractRotation( matrix4 );

						uniforms$2.halfWidth.set( light.width * 0.5, 0.0, 0.0 );
						uniforms$2.halfHeight.set( 0.0, light.height * 0.5, 0.0 );

						uniforms$2.halfWidth.applyMatrix4( matrix42 );
						uniforms$2.halfHeight.applyMatrix4( matrix42 );

						// TODO (abelnation): RectAreaLight distance?
						// uniforms.distance = distance;

						state.rectArea[ rectAreaLength ] = uniforms$2;

						rectAreaLength ++;

					} else if ( light.isPointLight ) {

						var uniforms$3 = cache.get( light );

						uniforms$3.position.setFromMatrixPosition( light.matrixWorld );
						uniforms$3.position.applyMatrix4( viewMatrix );

						uniforms$3.color.copy( light.color ).multiplyScalar( light.intensity );
						uniforms$3.distance = light.distance;
						uniforms$3.decay = light.decay;

						if ( light.castShadow ) {

							var shadow$2 = light.shadow;

							var shadowUniforms$2 = shadowCache.get( light );

							shadowUniforms$2.shadowBias = shadow$2.bias;
							shadowUniforms$2.shadowNormalBias = shadow$2.normalBias;
							shadowUniforms$2.shadowRadius = shadow$2.radius;
							shadowUniforms$2.shadowMapSize = shadow$2.mapSize;
							shadowUniforms$2.shadowCameraNear = shadow$2.camera.near;
							shadowUniforms$2.shadowCameraFar = shadow$2.camera.far;

							state.pointShadow[ pointLength ] = shadowUniforms$2;
							state.pointShadowMap[ pointLength ] = shadowMap;
							state.pointShadowMatrix[ pointLength ] = light.shadow.matrix;

							numPointShadows ++;

						}

						state.point[ pointLength ] = uniforms$3;

						pointLength ++;

					} else if ( light.isHemisphereLight ) {

						var uniforms$4 = cache.get( light );

						uniforms$4.direction.setFromMatrixPosition( light.matrixWorld );
						uniforms$4.direction.transformDirection( viewMatrix );
						uniforms$4.direction.normalize();

						uniforms$4.skyColor.copy( light.color ).multiplyScalar( intensity );
						uniforms$4.groundColor.copy( light.groundColor ).multiplyScalar( intensity );

						state.hemi[ hemiLength ] = uniforms$4;

						hemiLength ++;

					}

				}

				if ( rectAreaLength > 0 ) {

					state.rectAreaLTC1 = UniformsLib.LTC_1;
					state.rectAreaLTC2 = UniformsLib.LTC_2;

				}

				state.ambient[ 0 ] = r;
				state.ambient[ 1 ] = g;
				state.ambient[ 2 ] = b;

				var hash = state.hash;

				if ( hash.directionalLength !== directionalLength ||
					hash.pointLength !== pointLength ||
					hash.spotLength !== spotLength ||
					hash.rectAreaLength !== rectAreaLength ||
					hash.hemiLength !== hemiLength ||
					hash.numDirectionalShadows !== numDirectionalShadows ||
					hash.numPointShadows !== numPointShadows ||
					hash.numSpotShadows !== numSpotShadows ) {

					state.directional.length = directionalLength;
					state.spot.length = spotLength;
					state.rectArea.length = rectAreaLength;
					state.point.length = pointLength;
					state.hemi.length = hemiLength;

					state.directionalShadow.length = numDirectionalShadows;
					state.directionalShadowMap.length = numDirectionalShadows;
					state.pointShadow.length = numPointShadows;
					state.pointShadowMap.length = numPointShadows;
					state.spotShadow.length = numSpotShadows;
					state.spotShadowMap.length = numSpotShadows;
					state.directionalShadowMatrix.length = numDirectionalShadows;
					state.pointShadowMatrix.length = numPointShadows;
					state.spotShadowMatrix.length = numSpotShadows;

					hash.directionalLength = directionalLength;
					hash.pointLength = pointLength;
					hash.spotLength = spotLength;
					hash.rectAreaLength = rectAreaLength;
					hash.hemiLength = hemiLength;

					hash.numDirectionalShadows = numDirectionalShadows;
					hash.numPointShadows = numPointShadows;
					hash.numSpotShadows = numSpotShadows;

					state.version = nextVersion ++;

				}

			}

			return {
				setup: setup,
				state: state
			};

		}

		function WebGLRenderState() {

			var lights = new WebGLLights();

			var lightsArray = [];
			var shadowsArray = [];

			function init() {

				lightsArray.length = 0;
				shadowsArray.length = 0;

			}

			function pushLight( light ) {

				lightsArray.push( light );

			}

			function pushShadow( shadowLight ) {

				shadowsArray.push( shadowLight );

			}

			function setupLights( camera ) {

				lights.setup( lightsArray, shadowsArray, camera );

			}

			var state = {
				lightsArray: lightsArray,
				shadowsArray: shadowsArray,

				lights: lights
			};

			return {
				init: init,
				state: state,
				setupLights: setupLights,

				pushLight: pushLight,
				pushShadow: pushShadow
			};

		}

		function WebGLRenderStates() {

			var renderStates = new WeakMap();

			function get( scene, camera ) {

				var renderState;

				if ( renderStates.has( scene ) === false ) {

					renderState = new WebGLRenderState();
					renderStates.set( scene, new WeakMap() );
					renderStates.get( scene ).set( camera, renderState );

				} else {

					if ( renderStates.get( scene ).has( camera ) === false ) {

						renderState = new WebGLRenderState();
						renderStates.get( scene ).set( camera, renderState );

					} else {

						renderState = renderStates.get( scene ).get( camera );

					}

				}

				return renderState;

			}

			function dispose() {

				renderStates = new WeakMap();

			}

			return {
				get: get,
				dispose: dispose
			};

		}

		/**
		 * parameters = {
		 *
		 *  opacity: <float>,
		 *
		 *  map: new THREE.Texture( <Image> ),
		 *
		 *  alphaMap: new THREE.Texture( <Image> ),
		 *
		 *  displacementMap: new THREE.Texture( <Image> ),
		 *  displacementScale: <float>,
		 *  displacementBias: <float>,
		 *
		 *  wireframe: <boolean>,
		 *  wireframeLinewidth: <float>
		 * }
		 */

		function MeshDepthMaterial( parameters ) {

			Material.call( this );

			this.type = 'MeshDepthMaterial';

			this.depthPacking = BasicDepthPacking;

			this.skinning = false;
			this.morphTargets = false;

			this.map = null;

			this.alphaMap = null;

			this.displacementMap = null;
			this.displacementScale = 1;
			this.displacementBias = 0;

			this.wireframe = false;
			this.wireframeLinewidth = 1;

			this.fog = false;

			this.setValues( parameters );

		}

		MeshDepthMaterial.prototype = Object.create( Material.prototype );
		MeshDepthMaterial.prototype.constructor = MeshDepthMaterial;

		MeshDepthMaterial.prototype.isMeshDepthMaterial = true;

		MeshDepthMaterial.prototype.copy = function ( source ) {

			Material.prototype.copy.call( this, source );

			this.depthPacking = source.depthPacking;

			this.skinning = source.skinning;
			this.morphTargets = source.morphTargets;

			this.map = source.map;

			this.alphaMap = source.alphaMap;

			this.displacementMap = source.displacementMap;
			this.displacementScale = source.displacementScale;
			this.displacementBias = source.displacementBias;

			this.wireframe = source.wireframe;
			this.wireframeLinewidth = source.wireframeLinewidth;

			return this;

		};

		/**
		 * parameters = {
		 *
		 *  referencePosition: <float>,
		 *  nearDistance: <float>,
		 *  farDistance: <float>,
		 *
		 *  skinning: <bool>,
		 *  morphTargets: <bool>,
		 *
		 *  map: new THREE.Texture( <Image> ),
		 *
		 *  alphaMap: new THREE.Texture( <Image> ),
		 *
		 *  displacementMap: new THREE.Texture( <Image> ),
		 *  displacementScale: <float>,
		 *  displacementBias: <float>
		 *
		 * }
		 */

		function MeshDistanceMaterial( parameters ) {

			Material.call( this );

			this.type = 'MeshDistanceMaterial';

			this.referencePosition = new Vector3();
			this.nearDistance = 1;
			this.farDistance = 1000;

			this.skinning = false;
			this.morphTargets = false;

			this.map = null;

			this.alphaMap = null;

			this.displacementMap = null;
			this.displacementScale = 1;
			this.displacementBias = 0;

			this.fog = false;

			this.setValues( parameters );

		}

		MeshDistanceMaterial.prototype = Object.create( Material.prototype );
		MeshDistanceMaterial.prototype.constructor = MeshDistanceMaterial;

		MeshDistanceMaterial.prototype.isMeshDistanceMaterial = true;

		MeshDistanceMaterial.prototype.copy = function ( source ) {

			Material.prototype.copy.call( this, source );

			this.referencePosition.copy( source.referencePosition );
			this.nearDistance = source.nearDistance;
			this.farDistance = source.farDistance;

			this.skinning = source.skinning;
			this.morphTargets = source.morphTargets;

			this.map = source.map;

			this.alphaMap = source.alphaMap;

			this.displacementMap = source.displacementMap;
			this.displacementScale = source.displacementScale;
			this.displacementBias = source.displacementBias;

			return this;

		};

		var vsm_frag = "uniform sampler2D shadow_pass;\nuniform vec2 resolution;\nuniform float radius;\n#include <packing>\nvoid main() {\n\tfloat mean = 0.0;\n\tfloat squared_mean = 0.0;\n\tfloat depth = unpackRGBAToDepth( texture2D( shadow_pass, ( gl_FragCoord.xy ) / resolution ) );\n\tfor ( float i = -1.0; i < 1.0 ; i += SAMPLE_RATE) {\n\t\t#ifdef HORIZONAL_PASS\n\t\t\tvec2 distribution = unpackRGBATo2Half( texture2D( shadow_pass, ( gl_FragCoord.xy + vec2( i, 0.0 ) * radius ) / resolution ) );\n\t\t\tmean += distribution.x;\n\t\t\tsquared_mean += distribution.y * distribution.y + distribution.x * distribution.x;\n\t\t#else\n\t\t\tfloat depth = unpackRGBAToDepth( texture2D( shadow_pass, ( gl_FragCoord.xy + vec2( 0.0, i ) * radius ) / resolution ) );\n\t\t\tmean += depth;\n\t\t\tsquared_mean += depth * depth;\n\t\t#endif\n\t}\n\tmean = mean * HALF_SAMPLE_RATE;\n\tsquared_mean = squared_mean * HALF_SAMPLE_RATE;\n\tfloat std_dev = sqrt( squared_mean - mean * mean );\n\tgl_FragColor = pack2HalfToRGBA( vec2( mean, std_dev ) );\n}";

		var vsm_vert = "void main() {\n\tgl_Position = vec4( position, 1.0 );\n}";

		function WebGLShadowMap( _renderer, _objects, maxTextureSize ) {

			var _frustum = new Frustum();

			var _shadowMapSize = new Vector2(),
				_viewportSize = new Vector2(),

				_viewport = new Vector4(),

				_depthMaterials = [],
				_distanceMaterials = [],

				_materialCache = {};

			var shadowSide = { 0: BackSide, 1: FrontSide, 2: DoubleSide };

			var shadowMaterialVertical = new ShaderMaterial( {

				defines: {
					SAMPLE_RATE: 2.0 / 8.0,
					HALF_SAMPLE_RATE: 1.0 / 8.0
				},

				uniforms: {
					shadow_pass: { value: null },
					resolution: { value: new Vector2() },
					radius: { value: 4.0 }
				},

				vertexShader: vsm_vert,

				fragmentShader: vsm_frag

			} );

			var shadowMaterialHorizonal = shadowMaterialVertical.clone();
			shadowMaterialHorizonal.defines.HORIZONAL_PASS = 1;

			var fullScreenTri = new BufferGeometry();
			fullScreenTri.setAttribute(
				"position",
				new BufferAttribute(
					new Float32Array( [ - 1, - 1, 0.5, 3, - 1, 0.5, - 1, 3, 0.5 ] ),
					3
				)
			);

			var fullScreenMesh = new Mesh( fullScreenTri, shadowMaterialVertical );

			var scope = this;

			this.enabled = false;

			this.autoUpdate = true;
			this.needsUpdate = false;

			this.type = PCFShadowMap;

			this.render = function ( lights, scene, camera ) {

				if ( scope.enabled === false ) { return; }
				if ( scope.autoUpdate === false && scope.needsUpdate === false ) { return; }

				if ( lights.length === 0 ) { return; }

				var currentRenderTarget = _renderer.getRenderTarget();
				var activeCubeFace = _renderer.getActiveCubeFace();
				var activeMipmapLevel = _renderer.getActiveMipmapLevel();

				var _state = _renderer.state;

				// Set GL state for depth map.
				_state.setBlending( NoBlending );
				_state.buffers.color.setClear( 1, 1, 1, 1 );
				_state.buffers.depth.setTest( true );
				_state.setScissorTest( false );

				// render depth map

				for ( var i = 0, il = lights.length; i < il; i ++ ) {

					var light = lights[ i ];
					var shadow = light.shadow;

					if ( shadow.autoUpdate === false && shadow.needsUpdate === false ) { continue; }

					if ( shadow === undefined ) {

						console.warn( 'THREE.WebGLShadowMap:', light, 'has no shadow.' );
						continue;

					}

					_shadowMapSize.copy( shadow.mapSize );

					var shadowFrameExtents = shadow.getFrameExtents();

					_shadowMapSize.multiply( shadowFrameExtents );

					_viewportSize.copy( shadow.mapSize );

					if ( _shadowMapSize.x > maxTextureSize || _shadowMapSize.y > maxTextureSize ) {

						if ( _shadowMapSize.x > maxTextureSize ) {

							_viewportSize.x = Math.floor( maxTextureSize / shadowFrameExtents.x );
							_shadowMapSize.x = _viewportSize.x * shadowFrameExtents.x;
							shadow.mapSize.x = _viewportSize.x;

						}

						if ( _shadowMapSize.y > maxTextureSize ) {

							_viewportSize.y = Math.floor( maxTextureSize / shadowFrameExtents.y );
							_shadowMapSize.y = _viewportSize.y * shadowFrameExtents.y;
							shadow.mapSize.y = _viewportSize.y;

						}

					}

					if ( shadow.map === null && ! shadow.isPointLightShadow && this.type === VSMShadowMap ) {

						var pars = { minFilter: LinearFilter, magFilter: LinearFilter, format: RGBAFormat };

						shadow.map = new WebGLRenderTarget( _shadowMapSize.x, _shadowMapSize.y, pars );
						shadow.map.texture.name = light.name + ".shadowMap";

						shadow.mapPass = new WebGLRenderTarget( _shadowMapSize.x, _shadowMapSize.y, pars );

						shadow.camera.updateProjectionMatrix();

					}

					if ( shadow.map === null ) {

						var pars$1 = { minFilter: NearestFilter, magFilter: NearestFilter, format: RGBAFormat };

						shadow.map = new WebGLRenderTarget( _shadowMapSize.x, _shadowMapSize.y, pars$1 );
						shadow.map.texture.name = light.name + ".shadowMap";

						shadow.camera.updateProjectionMatrix();

					}

					_renderer.setRenderTarget( shadow.map );
					_renderer.clear();

					var viewportCount = shadow.getViewportCount();

					for ( var vp = 0; vp < viewportCount; vp ++ ) {

						var viewport = shadow.getViewport( vp );

						_viewport.set(
							_viewportSize.x * viewport.x,
							_viewportSize.y * viewport.y,
							_viewportSize.x * viewport.z,
							_viewportSize.y * viewport.w
						);

						_state.viewport( _viewport );

						shadow.updateMatrices( light, vp );

						_frustum = shadow.getFrustum();

						renderObject( scene, camera, shadow.camera, light, this.type );

					}

					// do blur pass for VSM

					if ( ! shadow.isPointLightShadow && this.type === VSMShadowMap ) {

						VSMPass( shadow, camera );

					}

					shadow.needsUpdate = false;

				}

				scope.needsUpdate = false;

				_renderer.setRenderTarget( currentRenderTarget, activeCubeFace, activeMipmapLevel );

			};

			function VSMPass( shadow, camera ) {

				var geometry = _objects.update( fullScreenMesh );

				// vertical pass

				shadowMaterialVertical.uniforms.shadow_pass.value = shadow.map.texture;
				shadowMaterialVertical.uniforms.resolution.value = shadow.mapSize;
				shadowMaterialVertical.uniforms.radius.value = shadow.radius;
				_renderer.setRenderTarget( shadow.mapPass );
				_renderer.clear();
				_renderer.renderBufferDirect( camera, null, geometry, shadowMaterialVertical, fullScreenMesh, null );

				// horizonal pass

				shadowMaterialHorizonal.uniforms.shadow_pass.value = shadow.mapPass.texture;
				shadowMaterialHorizonal.uniforms.resolution.value = shadow.mapSize;
				shadowMaterialHorizonal.uniforms.radius.value = shadow.radius;
				_renderer.setRenderTarget( shadow.map );
				_renderer.clear();
				_renderer.renderBufferDirect( camera, null, geometry, shadowMaterialHorizonal, fullScreenMesh, null );

			}

			function getDepthMaterialVariant( useMorphing, useSkinning, useInstancing ) {

				var index = useMorphing << 0 | useSkinning << 1 | useInstancing << 2;

				var material = _depthMaterials[ index ];

				if ( material === undefined ) {

					material = new MeshDepthMaterial( {

						depthPacking: RGBADepthPacking,

						morphTargets: useMorphing,
						skinning: useSkinning

					} );

					_depthMaterials[ index ] = material;

				}

				return material;

			}

			function getDistanceMaterialVariant( useMorphing, useSkinning, useInstancing ) {

				var index = useMorphing << 0 | useSkinning << 1 | useInstancing << 2;

				var material = _distanceMaterials[ index ];

				if ( material === undefined ) {

					material = new MeshDistanceMaterial( {

						morphTargets: useMorphing,
						skinning: useSkinning

					} );

					_distanceMaterials[ index ] = material;

				}

				return material;

			}

			function getDepthMaterial( object, geometry, material, light, shadowCameraNear, shadowCameraFar, type ) {

				var result = null;

				var getMaterialVariant = getDepthMaterialVariant;
				var customMaterial = object.customDepthMaterial;

				if ( light.isPointLight === true ) {

					getMaterialVariant = getDistanceMaterialVariant;
					customMaterial = object.customDistanceMaterial;

				}

				if ( customMaterial === undefined ) {

					var useMorphing = false;

					if ( material.morphTargets === true ) {

						useMorphing = geometry.morphAttributes && geometry.morphAttributes.position && geometry.morphAttributes.position.length > 0;

					}

					var useSkinning = false;

					if ( object.isSkinnedMesh === true ) {

						if ( material.skinning === true ) {

							useSkinning = true;

						} else {

							console.warn( 'THREE.WebGLShadowMap: THREE.SkinnedMesh with material.skinning set to false:', object );

						}

					}

					var useInstancing = object.isInstancedMesh === true;

					result = getMaterialVariant( useMorphing, useSkinning, useInstancing );

				} else {

					result = customMaterial;

				}

				if ( _renderer.localClippingEnabled &&
						material.clipShadows === true &&
						material.clippingPlanes.length !== 0 ) {

					// in this case we need a unique material instance reflecting the
					// appropriate state

					var keyA = result.uuid, keyB = material.uuid;

					var materialsForVariant = _materialCache[ keyA ];

					if ( materialsForVariant === undefined ) {

						materialsForVariant = {};
						_materialCache[ keyA ] = materialsForVariant;

					}

					var cachedMaterial = materialsForVariant[ keyB ];

					if ( cachedMaterial === undefined ) {

						cachedMaterial = result.clone();
						materialsForVariant[ keyB ] = cachedMaterial;

					}

					result = cachedMaterial;

				}

				result.visible = material.visible;
				result.wireframe = material.wireframe;

				if ( type === VSMShadowMap ) {

					result.side = ( material.shadowSide !== null ) ? material.shadowSide : material.side;

				} else {

					result.side = ( material.shadowSide !== null ) ? material.shadowSide : shadowSide[ material.side ];

				}

				result.clipShadows = material.clipShadows;
				result.clippingPlanes = material.clippingPlanes;
				result.clipIntersection = material.clipIntersection;

				result.wireframeLinewidth = material.wireframeLinewidth;
				result.linewidth = material.linewidth;

				if ( light.isPointLight === true && result.isMeshDistanceMaterial === true ) {

					result.referencePosition.setFromMatrixPosition( light.matrixWorld );
					result.nearDistance = shadowCameraNear;
					result.farDistance = shadowCameraFar;

				}

				return result;

			}

			function renderObject( object, camera, shadowCamera, light, type ) {

				if ( object.visible === false ) { return; }

				var visible = object.layers.test( camera.layers );

				if ( visible && ( object.isMesh || object.isLine || object.isPoints ) ) {

					if ( ( object.castShadow || ( object.receiveShadow && type === VSMShadowMap ) ) && ( ! object.frustumCulled || _frustum.intersectsObject( object ) ) ) {

						object.modelViewMatrix.multiplyMatrices( shadowCamera.matrixWorldInverse, object.matrixWorld );

						var geometry = _objects.update( object );
						var material = object.material;

						if ( Array.isArray( material ) ) {

							var groups = geometry.groups;

							for ( var k = 0, kl = groups.length; k < kl; k ++ ) {

								var group = groups[ k ];
								var groupMaterial = material[ group.materialIndex ];

								if ( groupMaterial && groupMaterial.visible ) {

									var depthMaterial = getDepthMaterial( object, geometry, groupMaterial, light, shadowCamera.near, shadowCamera.far, type );

									_renderer.renderBufferDirect( shadowCamera, null, geometry, depthMaterial, object, group );

								}

							}

						} else if ( material.visible ) {

							var depthMaterial$1 = getDepthMaterial( object, geometry, material, light, shadowCamera.near, shadowCamera.far, type );

							_renderer.renderBufferDirect( shadowCamera, null, geometry, depthMaterial$1, object, null );

						}

					}

				}

				var children = object.children;

				for ( var i = 0, l = children.length; i < l; i ++ ) {

					renderObject( children[ i ], camera, shadowCamera, light, type );

				}

			}

		}

		function WebGLState( gl, extensions, capabilities ) {

			var isWebGL2 = capabilities.isWebGL2;

			function ColorBuffer() {

				var locked = false;

				var color = new Vector4();
				var currentColorMask = null;
				var currentColorClear = new Vector4( 0, 0, 0, 0 );

				return {

					setMask: function ( colorMask ) {

						if ( currentColorMask !== colorMask && ! locked ) {

							gl.colorMask( colorMask, colorMask, colorMask, colorMask );
							currentColorMask = colorMask;

						}

					},

					setLocked: function ( lock ) {

						locked = lock;

					},

					setClear: function ( r, g, b, a, premultipliedAlpha ) {

						if ( premultipliedAlpha === true ) {

							r *= a; g *= a; b *= a;

						}

						color.set( r, g, b, a );

						if ( currentColorClear.equals( color ) === false ) {

							gl.clearColor( r, g, b, a );
							currentColorClear.copy( color );

						}

					},

					reset: function () {

						locked = false;

						currentColorMask = null;
						currentColorClear.set( - 1, 0, 0, 0 ); // set to invalid state

					}

				};

			}

			function DepthBuffer() {

				var locked = false;

				var currentDepthMask = null;
				var currentDepthFunc = null;
				var currentDepthClear = null;

				return {

					setTest: function ( depthTest ) {

						if ( depthTest ) {

							enable( 2929 );

						} else {

							disable( 2929 );

						}

					},

					setMask: function ( depthMask ) {

						if ( currentDepthMask !== depthMask && ! locked ) {

							gl.depthMask( depthMask );
							currentDepthMask = depthMask;

						}

					},

					setFunc: function ( depthFunc ) {

						if ( currentDepthFunc !== depthFunc ) {

							if ( depthFunc ) {

								switch ( depthFunc ) {

									case NeverDepth:

										gl.depthFunc( 512 );
										break;

									case AlwaysDepth:

										gl.depthFunc( 519 );
										break;

									case LessDepth:

										gl.depthFunc( 513 );
										break;

									case LessEqualDepth:

										gl.depthFunc( 515 );
										break;

									case EqualDepth:

										gl.depthFunc( 514 );
										break;

									case GreaterEqualDepth:

										gl.depthFunc( 518 );
										break;

									case GreaterDepth:

										gl.depthFunc( 516 );
										break;

									case NotEqualDepth:

										gl.depthFunc( 517 );
										break;

									default:

										gl.depthFunc( 515 );

								}

							} else {

								gl.depthFunc( 515 );

							}

							currentDepthFunc = depthFunc;

						}

					},

					setLocked: function ( lock ) {

						locked = lock;

					},

					setClear: function ( depth ) {

						if ( currentDepthClear !== depth ) {

							gl.clearDepth( depth );
							currentDepthClear = depth;

						}

					},

					reset: function () {

						locked = false;

						currentDepthMask = null;
						currentDepthFunc = null;
						currentDepthClear = null;

					}

				};

			}

			function StencilBuffer() {

				var locked = false;

				var currentStencilMask = null;
				var currentStencilFunc = null;
				var currentStencilRef = null;
				var currentStencilFuncMask = null;
				var currentStencilFail = null;
				var currentStencilZFail = null;
				var currentStencilZPass = null;
				var currentStencilClear = null;

				return {

					setTest: function ( stencilTest ) {

						if ( ! locked ) {

							if ( stencilTest ) {

								enable( 2960 );

							} else {

								disable( 2960 );

							}

						}

					},

					setMask: function ( stencilMask ) {

						if ( currentStencilMask !== stencilMask && ! locked ) {

							gl.stencilMask( stencilMask );
							currentStencilMask = stencilMask;

						}

					},

					setFunc: function ( stencilFunc, stencilRef, stencilMask ) {

						if ( currentStencilFunc !== stencilFunc ||
						     currentStencilRef !== stencilRef ||
						     currentStencilFuncMask !== stencilMask ) {

							gl.stencilFunc( stencilFunc, stencilRef, stencilMask );

							currentStencilFunc = stencilFunc;
							currentStencilRef = stencilRef;
							currentStencilFuncMask = stencilMask;

						}

					},

					setOp: function ( stencilFail, stencilZFail, stencilZPass ) {

						if ( currentStencilFail !== stencilFail ||
						     currentStencilZFail !== stencilZFail ||
						     currentStencilZPass !== stencilZPass ) {

							gl.stencilOp( stencilFail, stencilZFail, stencilZPass );

							currentStencilFail = stencilFail;
							currentStencilZFail = stencilZFail;
							currentStencilZPass = stencilZPass;

						}

					},

					setLocked: function ( lock ) {

						locked = lock;

					},

					setClear: function ( stencil ) {

						if ( currentStencilClear !== stencil ) {

							gl.clearStencil( stencil );
							currentStencilClear = stencil;

						}

					},

					reset: function () {

						locked = false;

						currentStencilMask = null;
						currentStencilFunc = null;
						currentStencilRef = null;
						currentStencilFuncMask = null;
						currentStencilFail = null;
						currentStencilZFail = null;
						currentStencilZPass = null;
						currentStencilClear = null;

					}

				};

			}

			//

			var colorBuffer = new ColorBuffer();
			var depthBuffer = new DepthBuffer();
			var stencilBuffer = new StencilBuffer();

			var enabledCapabilities = {};

			var currentProgram = null;

			var currentBlendingEnabled = null;
			var currentBlending = null;
			var currentBlendEquation = null;
			var currentBlendSrc = null;
			var currentBlendDst = null;
			var currentBlendEquationAlpha = null;
			var currentBlendSrcAlpha = null;
			var currentBlendDstAlpha = null;
			var currentPremultipledAlpha = false;

			var currentFlipSided = null;
			var currentCullFace = null;

			var currentLineWidth = null;

			var currentPolygonOffsetFactor = null;
			var currentPolygonOffsetUnits = null;

			var maxTextures = gl.getParameter( 35661 );

			var lineWidthAvailable = false;
			var version = 0;
			var glVersion = gl.getParameter( 7938 );

			if ( glVersion.indexOf( 'WebGL' ) !== - 1 ) {

				version = parseFloat( /^WebGL\ ([0-9])/.exec( glVersion )[ 1 ] );
				lineWidthAvailable = ( version >= 1.0 );

			} else if ( glVersion.indexOf( 'OpenGL ES' ) !== - 1 ) {

				version = parseFloat( /^OpenGL\ ES\ ([0-9])/.exec( glVersion )[ 1 ] );
				lineWidthAvailable = ( version >= 2.0 );

			}

			var currentTextureSlot = null;
			var currentBoundTextures = {};

			var currentScissor = new Vector4();
			var currentViewport = new Vector4();

			function createTexture( type, target, count ) {

				var data = new Uint8Array( 4 ); // 4 is required to match default unpack alignment of 4.
				var texture = gl.createTexture();

				gl.bindTexture( type, texture );
				gl.texParameteri( type, 10241, 9728 );
				gl.texParameteri( type, 10240, 9728 );

				for ( var i = 0; i < count; i ++ ) {

					gl.texImage2D( target + i, 0, 6408, 1, 1, 0, 6408, 5121, data );

				}

				return texture;

			}

			var emptyTextures = {};
			emptyTextures[ 3553 ] = createTexture( 3553, 3553, 1 );
			emptyTextures[ 34067 ] = createTexture( 34067, 34069, 6 );

			// init

			colorBuffer.setClear( 0, 0, 0, 1 );
			depthBuffer.setClear( 1 );
			stencilBuffer.setClear( 0 );

			enable( 2929 );
			depthBuffer.setFunc( LessEqualDepth );

			setFlipSided( false );
			setCullFace( CullFaceBack );
			enable( 2884 );

			setBlending( NoBlending );

			//

			function enable( id ) {

				if ( enabledCapabilities[ id ] !== true ) {

					gl.enable( id );
					enabledCapabilities[ id ] = true;

				}

			}

			function disable( id ) {

				if ( enabledCapabilities[ id ] !== false ) {

					gl.disable( id );
					enabledCapabilities[ id ] = false;

				}

			}

			function useProgram( program ) {

				if ( currentProgram !== program ) {

					gl.useProgram( program );

					currentProgram = program;

					return true;

				}

				return false;

			}

			var equationToGL = {};
			equationToGL[ AddEquation ] = 32774;
			equationToGL[ SubtractEquation ] = 32778;
			equationToGL[ ReverseSubtractEquation ] = 32779;

			if ( isWebGL2 ) {

				equationToGL[ MinEquation ] = 32775;
				equationToGL[ MaxEquation ] = 32776;

			} else {

				var extension = extensions.get( 'EXT_blend_minmax' );

				if ( extension !== null ) {

					equationToGL[ MinEquation ] = extension.MIN_EXT;
					equationToGL[ MaxEquation ] = extension.MAX_EXT;

				}

			}

			var factorToGL = {};
			factorToGL[ ZeroFactor ] = 0;
			factorToGL[ OneFactor ] = 1;
			factorToGL[ SrcColorFactor ] = 768;
			factorToGL[ SrcAlphaFactor ] = 770;
			factorToGL[ SrcAlphaSaturateFactor ] = 776;
			factorToGL[ DstColorFactor ] = 774;
			factorToGL[ DstAlphaFactor ] = 772;
			factorToGL[ OneMinusSrcColorFactor ] = 769;
			factorToGL[ OneMinusSrcAlphaFactor ] = 771;
			factorToGL[ OneMinusDstColorFactor ] = 775;
			factorToGL[ OneMinusDstAlphaFactor ] = 773;

			function setBlending( blending, blendEquation, blendSrc, blendDst, blendEquationAlpha, blendSrcAlpha, blendDstAlpha, premultipliedAlpha ) {

				if ( blending === NoBlending ) {

					if ( currentBlendingEnabled ) {

						disable( 3042 );
						currentBlendingEnabled = false;

					}

					return;

				}

				if ( ! currentBlendingEnabled ) {

					enable( 3042 );
					currentBlendingEnabled = true;

				}

				if ( blending !== CustomBlending ) {

					if ( blending !== currentBlending || premultipliedAlpha !== currentPremultipledAlpha ) {

						if ( currentBlendEquation !== AddEquation || currentBlendEquationAlpha !== AddEquation ) {

							gl.blendEquation( 32774 );

							currentBlendEquation = AddEquation;
							currentBlendEquationAlpha = AddEquation;

						}

						if ( premultipliedAlpha ) {

							switch ( blending ) {

								case NormalBlending:
									gl.blendFuncSeparate( 1, 771, 1, 771 );
									break;

								case AdditiveBlending:
									gl.blendFunc( 1, 1 );
									break;

								case SubtractiveBlending:
									gl.blendFuncSeparate( 0, 0, 769, 771 );
									break;

								case MultiplyBlending:
									gl.blendFuncSeparate( 0, 768, 0, 770 );
									break;

								default:
									console.error( 'THREE.WebGLState: Invalid blending: ', blending );
									break;

							}

						} else {

							switch ( blending ) {

								case NormalBlending:
									gl.blendFuncSeparate( 770, 771, 1, 771 );
									break;

								case AdditiveBlending:
									gl.blendFunc( 770, 1 );
									break;

								case SubtractiveBlending:
									gl.blendFunc( 0, 769 );
									break;

								case MultiplyBlending:
									gl.blendFunc( 0, 768 );
									break;

								default:
									console.error( 'THREE.WebGLState: Invalid blending: ', blending );
									break;

							}

						}

						currentBlendSrc = null;
						currentBlendDst = null;
						currentBlendSrcAlpha = null;
						currentBlendDstAlpha = null;

						currentBlending = blending;
						currentPremultipledAlpha = premultipliedAlpha;

					}

					return;

				}

				// custom blending

				blendEquationAlpha = blendEquationAlpha || blendEquation;
				blendSrcAlpha = blendSrcAlpha || blendSrc;
				blendDstAlpha = blendDstAlpha || blendDst;

				if ( blendEquation !== currentBlendEquation || blendEquationAlpha !== currentBlendEquationAlpha ) {

					gl.blendEquationSeparate( equationToGL[ blendEquation ], equationToGL[ blendEquationAlpha ] );

					currentBlendEquation = blendEquation;
					currentBlendEquationAlpha = blendEquationAlpha;

				}

				if ( blendSrc !== currentBlendSrc || blendDst !== currentBlendDst || blendSrcAlpha !== currentBlendSrcAlpha || blendDstAlpha !== currentBlendDstAlpha ) {

					gl.blendFuncSeparate( factorToGL[ blendSrc ], factorToGL[ blendDst ], factorToGL[ blendSrcAlpha ], factorToGL[ blendDstAlpha ] );

					currentBlendSrc = blendSrc;
					currentBlendDst = blendDst;
					currentBlendSrcAlpha = blendSrcAlpha;
					currentBlendDstAlpha = blendDstAlpha;

				}

				currentBlending = blending;
				currentPremultipledAlpha = null;

			}

			function setMaterial( material, frontFaceCW ) {

				material.side === DoubleSide
					? disable( 2884 )
					: enable( 2884 );

				var flipSided = ( material.side === BackSide );
				if ( frontFaceCW ) { flipSided = ! flipSided; }

				setFlipSided( flipSided );

				( material.blending === NormalBlending && material.transparent === false )
					? setBlending( NoBlending )
					: setBlending( material.blending, material.blendEquation, material.blendSrc, material.blendDst, material.blendEquationAlpha, material.blendSrcAlpha, material.blendDstAlpha, material.premultipliedAlpha );

				depthBuffer.setFunc( material.depthFunc );
				depthBuffer.setTest( material.depthTest );
				depthBuffer.setMask( material.depthWrite );
				colorBuffer.setMask( material.colorWrite );

				var stencilWrite = material.stencilWrite;
				stencilBuffer.setTest( stencilWrite );
				if ( stencilWrite ) {

					stencilBuffer.setMask( material.stencilWriteMask );
					stencilBuffer.setFunc( material.stencilFunc, material.stencilRef, material.stencilFuncMask );
					stencilBuffer.setOp( material.stencilFail, material.stencilZFail, material.stencilZPass );

				}

				setPolygonOffset( material.polygonOffset, material.polygonOffsetFactor, material.polygonOffsetUnits );

			}

			//

			function setFlipSided( flipSided ) {

				if ( currentFlipSided !== flipSided ) {

					if ( flipSided ) {

						gl.frontFace( 2304 );

					} else {

						gl.frontFace( 2305 );

					}

					currentFlipSided = flipSided;

				}

			}

			function setCullFace( cullFace ) {

				if ( cullFace !== CullFaceNone ) {

					enable( 2884 );

					if ( cullFace !== currentCullFace ) {

						if ( cullFace === CullFaceBack ) {

							gl.cullFace( 1029 );

						} else if ( cullFace === CullFaceFront ) {

							gl.cullFace( 1028 );

						} else {

							gl.cullFace( 1032 );

						}

					}

				} else {

					disable( 2884 );

				}

				currentCullFace = cullFace;

			}

			function setLineWidth( width ) {

				if ( width !== currentLineWidth ) {

					if ( lineWidthAvailable ) { gl.lineWidth( width ); }

					currentLineWidth = width;

				}

			}

			function setPolygonOffset( polygonOffset, factor, units ) {

				if ( polygonOffset ) {

					enable( 32823 );

					if ( currentPolygonOffsetFactor !== factor || currentPolygonOffsetUnits !== units ) {

						gl.polygonOffset( factor, units );

						currentPolygonOffsetFactor = factor;
						currentPolygonOffsetUnits = units;

					}

				} else {

					disable( 32823 );

				}

			}

			function setScissorTest( scissorTest ) {

				if ( scissorTest ) {

					enable( 3089 );

				} else {

					disable( 3089 );

				}

			}

			// texture

			function activeTexture( webglSlot ) {

				if ( webglSlot === undefined ) { webglSlot = 33984 + maxTextures - 1; }

				if ( currentTextureSlot !== webglSlot ) {

					gl.activeTexture( webglSlot );
					currentTextureSlot = webglSlot;

				}

			}

			function bindTexture( webglType, webglTexture ) {

				if ( currentTextureSlot === null ) {

					activeTexture();

				}

				var boundTexture = currentBoundTextures[ currentTextureSlot ];

				if ( boundTexture === undefined ) {

					boundTexture = { type: undefined, texture: undefined };
					currentBoundTextures[ currentTextureSlot ] = boundTexture;

				}

				if ( boundTexture.type !== webglType || boundTexture.texture !== webglTexture ) {

					gl.bindTexture( webglType, webglTexture || emptyTextures[ webglType ] );

					boundTexture.type = webglType;
					boundTexture.texture = webglTexture;

				}

			}

			function unbindTexture() {

				var boundTexture = currentBoundTextures[ currentTextureSlot ];

				if ( boundTexture !== undefined && boundTexture.type !== undefined ) {

					gl.bindTexture( boundTexture.type, null );

					boundTexture.type = undefined;
					boundTexture.texture = undefined;

				}

			}

			function compressedTexImage2D() {

				try {

					gl.compressedTexImage2D.apply( gl, arguments );

				} catch ( error ) {

					console.error( 'THREE.WebGLState:', error );

				}

			}

			function texImage2D() {

				try {

					gl.texImage2D.apply( gl, arguments );

				} catch ( error ) {

					console.error( 'THREE.WebGLState:', error );

				}

			}

			function texImage3D() {

				try {

					gl.texImage3D.apply( gl, arguments );

				} catch ( error ) {

					console.error( 'THREE.WebGLState:', error );

				}

			}

			//

			function scissor( scissor ) {

				if ( currentScissor.equals( scissor ) === false ) {

					gl.scissor( scissor.x, scissor.y, scissor.z, scissor.w );
					currentScissor.copy( scissor );

				}

			}

			function viewport( viewport ) {

				if ( currentViewport.equals( viewport ) === false ) {

					gl.viewport( viewport.x, viewport.y, viewport.z, viewport.w );
					currentViewport.copy( viewport );

				}

			}

			//

			function reset() {

				enabledCapabilities = {};

				currentTextureSlot = null;
				currentBoundTextures = {};

				currentProgram = null;

				currentBlending = null;

				currentFlipSided = null;
				currentCullFace = null;

				colorBuffer.reset();
				depthBuffer.reset();
				stencilBuffer.reset();

			}

			return {

				buffers: {
					color: colorBuffer,
					depth: depthBuffer,
					stencil: stencilBuffer
				},

				enable: enable,
				disable: disable,

				useProgram: useProgram,

				setBlending: setBlending,
				setMaterial: setMaterial,

				setFlipSided: setFlipSided,
				setCullFace: setCullFace,

				setLineWidth: setLineWidth,
				setPolygonOffset: setPolygonOffset,

				setScissorTest: setScissorTest,

				activeTexture: activeTexture,
				bindTexture: bindTexture,
				unbindTexture: unbindTexture,
				compressedTexImage2D: compressedTexImage2D,
				texImage2D: texImage2D,
				texImage3D: texImage3D,

				scissor: scissor,
				viewport: viewport,

				reset: reset

			};

		}

		function WebGLTextures( _gl, extensions, state, properties, capabilities, utils, info ) {

			var isWebGL2 = capabilities.isWebGL2;
			var maxTextures = capabilities.maxTextures;
			var maxCubemapSize = capabilities.maxCubemapSize;
			var maxTextureSize = capabilities.maxTextureSize;
			var maxSamples = capabilities.maxSamples;

			var _videoTextures = new WeakMap();
			var _canvas;

			// cordova iOS (as of 5.0) still uses UIWebView, which provides OffscreenCanvas,
			// also OffscreenCanvas.getContext("webgl"), but not OffscreenCanvas.getContext("2d")!
			// Some implementations may only implement OffscreenCanvas partially (e.g. lacking 2d).

			var useOffscreenCanvas = false;

			try {

				useOffscreenCanvas = typeof OffscreenCanvas !== 'undefined'
					&& ( new OffscreenCanvas( 1, 1 ).getContext( "2d" ) ) !== null;

			} catch ( err ) {

				// Ignore any errors

			}

			function createCanvas( width, height ) {

				// Use OffscreenCanvas when available. Specially needed in web workers

				return useOffscreenCanvas ?
					new OffscreenCanvas( width, height ) :
					document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );

			}

			function resizeImage( image, needsPowerOfTwo, needsNewCanvas, maxSize ) {

				var scale = 1;

				// handle case if texture exceeds max size

				if ( image.width > maxSize || image.height > maxSize ) {

					scale = maxSize / Math.max( image.width, image.height );

				}

				// only perform resize if necessary

				if ( scale < 1 || needsPowerOfTwo === true ) {

					// only perform resize for certain image types

					if ( ( typeof HTMLImageElement !== 'undefined' && image instanceof HTMLImageElement ) ||
						( typeof HTMLCanvasElement !== 'undefined' && image instanceof HTMLCanvasElement ) ||
						( typeof ImageBitmap !== 'undefined' && image instanceof ImageBitmap ) ) {

						var floor = needsPowerOfTwo ? MathUtils.floorPowerOfTwo : Math.floor;

						var width = floor( scale * image.width );
						var height = floor( scale * image.height );

						if ( _canvas === undefined ) { _canvas = createCanvas( width, height ); }

						// cube textures can't reuse the same canvas

						var canvas = needsNewCanvas ? createCanvas( width, height ) : _canvas;

						canvas.width = width;
						canvas.height = height;

						var context = canvas.getContext( '2d' );
						context.drawImage( image, 0, 0, width, height );

						console.warn( 'THREE.WebGLRenderer: Texture has been resized from (' + image.width + 'x' + image.height + ') to (' + width + 'x' + height + ').' );

						return canvas;

					} else {

						if ( 'data' in image ) {

							console.warn( 'THREE.WebGLRenderer: Image in DataTexture is too big (' + image.width + 'x' + image.height + ').' );

						}

						return image;

					}

				}

				return image;

			}

			function isPowerOfTwo( image ) {

				return MathUtils.isPowerOfTwo( image.width ) && MathUtils.isPowerOfTwo( image.height );

			}

			function textureNeedsPowerOfTwo( texture ) {

				if ( isWebGL2 ) { return false; }

				return ( texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping ) ||
					( texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter );

			}

			function textureNeedsGenerateMipmaps( texture, supportsMips ) {

				return texture.generateMipmaps && supportsMips &&
					texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter;

			}

			function generateMipmap( target, texture, width, height ) {

				_gl.generateMipmap( target );

				var textureProperties = properties.get( texture );

				// Note: Math.log( x ) * Math.LOG2E used instead of Math.log2( x ) which is not supported by IE11
				textureProperties.__maxMipLevel = Math.log( Math.max( width, height ) ) * Math.LOG2E;

			}

			function getInternalFormat( internalFormatName, glFormat, glType ) {

				if ( isWebGL2 === false ) { return glFormat; }

				if ( internalFormatName !== null ) {

					if ( _gl[ internalFormatName ] !== undefined ) { return _gl[ internalFormatName ]; }

					console.warn( 'THREE.WebGLRenderer: Attempt to use non-existing WebGL internal format \'' + internalFormatName + '\'' );

				}

				var internalFormat = glFormat;

				if ( glFormat === 6403 ) {

					if ( glType === 5126 ) { internalFormat = 33326; }
					if ( glType === 5131 ) { internalFormat = 33325; }
					if ( glType === 5121 ) { internalFormat = 33321; }

				}

				if ( glFormat === 6407 ) {

					if ( glType === 5126 ) { internalFormat = 34837; }
					if ( glType === 5131 ) { internalFormat = 34843; }
					if ( glType === 5121 ) { internalFormat = 32849; }

				}

				if ( glFormat === 6408 ) {

					if ( glType === 5126 ) { internalFormat = 34836; }
					if ( glType === 5131 ) { internalFormat = 34842; }
					if ( glType === 5121 ) { internalFormat = 32856; }

				}

				if ( internalFormat === 33325 || internalFormat === 33326 ||
					internalFormat === 34842 || internalFormat === 34836 ) {

					extensions.get( 'EXT_color_buffer_float' );

				}

				return internalFormat;

			}

			// Fallback filters for non-power-of-2 textures

			function filterFallback( f ) {

				if ( f === NearestFilter || f === NearestMipmapNearestFilter || f === NearestMipmapLinearFilter ) {

					return 9728;

				}

				return 9729;

			}

			//

			function onTextureDispose( event ) {

				var texture = event.target;

				texture.removeEventListener( 'dispose', onTextureDispose );

				deallocateTexture( texture );

				if ( texture.isVideoTexture ) {

					_videoTextures.delete( texture );

				}

				info.memory.textures --;

			}

			function onRenderTargetDispose( event ) {

				var renderTarget = event.target;

				renderTarget.removeEventListener( 'dispose', onRenderTargetDispose );

				deallocateRenderTarget( renderTarget );

				info.memory.textures --;

			}

			//

			function deallocateTexture( texture ) {

				var textureProperties = properties.get( texture );

				if ( textureProperties.__webglInit === undefined ) { return; }

				_gl.deleteTexture( textureProperties.__webglTexture );

				properties.remove( texture );

			}

			function deallocateRenderTarget( renderTarget ) {

				var renderTargetProperties = properties.get( renderTarget );
				var textureProperties = properties.get( renderTarget.texture );

				if ( ! renderTarget ) { return; }

				if ( textureProperties.__webglTexture !== undefined ) {

					_gl.deleteTexture( textureProperties.__webglTexture );

				}

				if ( renderTarget.depthTexture ) {

					renderTarget.depthTexture.dispose();

				}

				if ( renderTarget.isWebGLCubeRenderTarget ) {

					for ( var i = 0; i < 6; i ++ ) {

						_gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer[ i ] );
						if ( renderTargetProperties.__webglDepthbuffer ) { _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthbuffer[ i ] ); }

					}

				} else {

					_gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer );
					if ( renderTargetProperties.__webglDepthbuffer ) { _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthbuffer ); }
					if ( renderTargetProperties.__webglMultisampledFramebuffer ) { _gl.deleteFramebuffer( renderTargetProperties.__webglMultisampledFramebuffer ); }
					if ( renderTargetProperties.__webglColorRenderbuffer ) { _gl.deleteRenderbuffer( renderTargetProperties.__webglColorRenderbuffer ); }
					if ( renderTargetProperties.__webglDepthRenderbuffer ) { _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthRenderbuffer ); }

				}

				properties.remove( renderTarget.texture );
				properties.remove( renderTarget );

			}

			//

			var textureUnits = 0;

			function resetTextureUnits() {

				textureUnits = 0;

			}

			function allocateTextureUnit() {

				var textureUnit = textureUnits;

				if ( textureUnit >= maxTextures ) {

					console.warn( 'THREE.WebGLTextures: Trying to use ' + textureUnit + ' texture units while this GPU supports only ' + maxTextures );

				}

				textureUnits += 1;

				return textureUnit;

			}

			//

			function setTexture2D( texture, slot ) {

				var textureProperties = properties.get( texture );

				if ( texture.isVideoTexture ) { updateVideoTexture( texture ); }

				if ( texture.version > 0 && textureProperties.__version !== texture.version ) {

					var image = texture.image;

					if ( image === undefined ) {

						console.warn( 'THREE.WebGLRenderer: Texture marked for update but image is undefined' );

					} else if ( image.complete === false ) {

						console.warn( 'THREE.WebGLRenderer: Texture marked for update but image is incomplete' );

					} else {

						uploadTexture( textureProperties, texture, slot );
						return;

					}

				}

				state.activeTexture( 33984 + slot );
				state.bindTexture( 3553, textureProperties.__webglTexture );

			}

			function setTexture2DArray( texture, slot ) {

				var textureProperties = properties.get( texture );

				if ( texture.version > 0 && textureProperties.__version !== texture.version ) {

					uploadTexture( textureProperties, texture, slot );
					return;

				}

				state.activeTexture( 33984 + slot );
				state.bindTexture( 35866, textureProperties.__webglTexture );

			}

			function setTexture3D( texture, slot ) {

				var textureProperties = properties.get( texture );

				if ( texture.version > 0 && textureProperties.__version !== texture.version ) {

					uploadTexture( textureProperties, texture, slot );
					return;

				}

				state.activeTexture( 33984 + slot );
				state.bindTexture( 32879, textureProperties.__webglTexture );

			}

			function setTextureCube( texture, slot ) {

				if ( texture.image.length !== 6 ) { return; }

				var textureProperties = properties.get( texture );

				if ( texture.version > 0 && textureProperties.__version !== texture.version ) {

					initTexture( textureProperties, texture );

					state.activeTexture( 33984 + slot );
					state.bindTexture( 34067, textureProperties.__webglTexture );

					_gl.pixelStorei( 37440, texture.flipY );

					var isCompressed = ( texture && ( texture.isCompressedTexture || texture.image[ 0 ].isCompressedTexture ) );
					var isDataTexture = ( texture.image[ 0 ] && texture.image[ 0 ].isDataTexture );

					var cubeImage = [];

					for ( var i = 0; i < 6; i ++ ) {

						if ( ! isCompressed && ! isDataTexture ) {

							cubeImage[ i ] = resizeImage( texture.image[ i ], false, true, maxCubemapSize );

						} else {

							cubeImage[ i ] = isDataTexture ? texture.image[ i ].image : texture.image[ i ];

						}

					}

					var image = cubeImage[ 0 ],
						supportsMips = isPowerOfTwo( image ) || isWebGL2,
						glFormat = utils.convert( texture.format ),
						glType = utils.convert( texture.type ),
						glInternalFormat = getInternalFormat( texture.internalFormat, glFormat, glType );

					setTextureParameters( 34067, texture, supportsMips );

					var mipmaps;

					if ( isCompressed ) {

						for ( var i$1 = 0; i$1 < 6; i$1 ++ ) {

							mipmaps = cubeImage[ i$1 ].mipmaps;

							for ( var j = 0; j < mipmaps.length; j ++ ) {

								var mipmap = mipmaps[ j ];

								if ( texture.format !== RGBAFormat && texture.format !== RGBFormat ) {

									if ( glFormat !== null ) {

										state.compressedTexImage2D( 34069 + i$1, j, glInternalFormat, mipmap.width, mipmap.height, 0, mipmap.data );

									} else {

										console.warn( 'THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .setTextureCube()' );

									}

								} else {

									state.texImage2D( 34069 + i$1, j, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );

								}

							}

						}

						textureProperties.__maxMipLevel = mipmaps.length - 1;

					} else {

						mipmaps = texture.mipmaps;

						for ( var i$2 = 0; i$2 < 6; i$2 ++ ) {

							if ( isDataTexture ) {

								state.texImage2D( 34069 + i$2, 0, glInternalFormat, cubeImage[ i$2 ].width, cubeImage[ i$2 ].height, 0, glFormat, glType, cubeImage[ i$2 ].data );

								for ( var j$1 = 0; j$1 < mipmaps.length; j$1 ++ ) {

									var mipmap$1 = mipmaps[ j$1 ];
									var mipmapImage = mipmap$1.image[ i$2 ].image;

									state.texImage2D( 34069 + i$2, j$1 + 1, glInternalFormat, mipmapImage.width, mipmapImage.height, 0, glFormat, glType, mipmapImage.data );

								}

							} else {

								state.texImage2D( 34069 + i$2, 0, glInternalFormat, glFormat, glType, cubeImage[ i$2 ] );

								for ( var j$2 = 0; j$2 < mipmaps.length; j$2 ++ ) {

									var mipmap$2 = mipmaps[ j$2 ];

									state.texImage2D( 34069 + i$2, j$2 + 1, glInternalFormat, glFormat, glType, mipmap$2.image[ i$2 ] );

								}

							}

						}

						textureProperties.__maxMipLevel = mipmaps.length;

					}

					if ( textureNeedsGenerateMipmaps( texture, supportsMips ) ) {

						// We assume images for cube map have the same size.
						generateMipmap( 34067, texture, image.width, image.height );

					}

					textureProperties.__version = texture.version;

					if ( texture.onUpdate ) { texture.onUpdate( texture ); }

				} else {

					state.activeTexture( 33984 + slot );
					state.bindTexture( 34067, textureProperties.__webglTexture );

				}

			}

			function setTextureCubeDynamic( texture, slot ) {

				state.activeTexture( 33984 + slot );
				state.bindTexture( 34067, properties.get( texture ).__webglTexture );

			}

			var wrappingToGL = {};
			wrappingToGL[ RepeatWrapping ] = 10497;
			wrappingToGL[ ClampToEdgeWrapping ] = 33071;
			wrappingToGL[ MirroredRepeatWrapping ] = 33648;

			var filterToGL = {};
			filterToGL[ NearestFilter ] = 9728;
			filterToGL[ NearestMipmapNearestFilter ] = 9984;
			filterToGL[ NearestMipmapLinearFilter ] = 9986;
			filterToGL[ LinearFilter ] = 9729;
			filterToGL[ LinearMipmapNearestFilter ] = 9985;
			filterToGL[ LinearMipmapLinearFilter ] = 9987;

			function setTextureParameters( textureType, texture, supportsMips ) {

				if ( supportsMips ) {

					_gl.texParameteri( textureType, 10242, wrappingToGL[ texture.wrapS ] );
					_gl.texParameteri( textureType, 10243, wrappingToGL[ texture.wrapT ] );

					if ( textureType === 32879 || textureType === 35866 ) {

						_gl.texParameteri( textureType, 32882, wrappingToGL[ texture.wrapR ] );

					}

					_gl.texParameteri( textureType, 10240, filterToGL[ texture.magFilter ] );
					_gl.texParameteri( textureType, 10241, filterToGL[ texture.minFilter ] );

				} else {

					_gl.texParameteri( textureType, 10242, 33071 );
					_gl.texParameteri( textureType, 10243, 33071 );

					if ( textureType === 32879 || textureType === 35866 ) {

						_gl.texParameteri( textureType, 32882, 33071 );

					}

					if ( texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping ) {

						console.warn( 'THREE.WebGLRenderer: Texture is not power of two. Texture.wrapS and Texture.wrapT should be set to THREE.ClampToEdgeWrapping.' );

					}

					_gl.texParameteri( textureType, 10240, filterFallback( texture.magFilter ) );
					_gl.texParameteri( textureType, 10241, filterFallback( texture.minFilter ) );

					if ( texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter ) {

						console.warn( 'THREE.WebGLRenderer: Texture is not power of two. Texture.minFilter should be set to THREE.NearestFilter or THREE.LinearFilter.' );

					}

				}

				var extension = extensions.get( 'EXT_texture_filter_anisotropic' );

				if ( extension ) {

					if ( texture.type === FloatType && extensions.get( 'OES_texture_float_linear' ) === null ) { return; }
					if ( texture.type === HalfFloatType && ( isWebGL2 || extensions.get( 'OES_texture_half_float_linear' ) ) === null ) { return; }

					if ( texture.anisotropy > 1 || properties.get( texture ).__currentAnisotropy ) {

						_gl.texParameterf( textureType, extension.TEXTURE_MAX_ANISOTROPY_EXT, Math.min( texture.anisotropy, capabilities.getMaxAnisotropy() ) );
						properties.get( texture ).__currentAnisotropy = texture.anisotropy;

					}

				}

			}

			function initTexture( textureProperties, texture ) {

				if ( textureProperties.__webglInit === undefined ) {

					textureProperties.__webglInit = true;

					texture.addEventListener( 'dispose', onTextureDispose );

					textureProperties.__webglTexture = _gl.createTexture();

					info.memory.textures ++;

				}

			}

			function uploadTexture( textureProperties, texture, slot ) {

				var textureType = 3553;

				if ( texture.isDataTexture2DArray ) { textureType = 35866; }
				if ( texture.isDataTexture3D ) { textureType = 32879; }

				initTexture( textureProperties, texture );

				state.activeTexture( 33984 + slot );
				state.bindTexture( textureType, textureProperties.__webglTexture );

				_gl.pixelStorei( 37440, texture.flipY );
				_gl.pixelStorei( 37441, texture.premultiplyAlpha );
				_gl.pixelStorei( 3317, texture.unpackAlignment );

				var needsPowerOfTwo = textureNeedsPowerOfTwo( texture ) && isPowerOfTwo( texture.image ) === false;
				var image = resizeImage( texture.image, needsPowerOfTwo, false, maxTextureSize );

				var supportsMips = isPowerOfTwo( image ) || isWebGL2,
					glFormat = utils.convert( texture.format );

				var glType = utils.convert( texture.type ),
					glInternalFormat = getInternalFormat( texture.internalFormat, glFormat, glType );

				setTextureParameters( textureType, texture, supportsMips );

				var mipmap;
				var mipmaps = texture.mipmaps;

				if ( texture.isDepthTexture ) {

					// populate depth texture with dummy data

					glInternalFormat = 6402;

					if ( isWebGL2 ) {

						if ( texture.type === FloatType ) {

							glInternalFormat = 36012;

						} else if ( texture.type === UnsignedIntType ) {

							glInternalFormat = 33190;

						} else if ( texture.type === UnsignedInt248Type ) {

							glInternalFormat = 35056;

						} else {

							glInternalFormat = 33189; // WebGL2 requires sized internalformat for glTexImage2D

						}

					} else {

						if ( texture.type === FloatType ) {

							console.error( 'WebGLRenderer: Floating point depth texture requires WebGL2.' );

						}

					}

					// validation checks for WebGL 1

					if ( texture.format === DepthFormat && glInternalFormat === 6402 ) {

						// The error INVALID_OPERATION is generated by texImage2D if format and internalformat are
						// DEPTH_COMPONENT and type is not UNSIGNED_SHORT or UNSIGNED_INT
						// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)
						if ( texture.type !== UnsignedShortType && texture.type !== UnsignedIntType ) {

							console.warn( 'THREE.WebGLRenderer: Use UnsignedShortType or UnsignedIntType for DepthFormat DepthTexture.' );

							texture.type = UnsignedShortType;
							glType = utils.convert( texture.type );

						}

					}

					if ( texture.format === DepthStencilFormat && glInternalFormat === 6402 ) {

						// Depth stencil textures need the DEPTH_STENCIL internal format
						// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)
						glInternalFormat = 34041;

						// The error INVALID_OPERATION is generated by texImage2D if format and internalformat are
						// DEPTH_STENCIL and type is not UNSIGNED_INT_24_8_WEBGL.
						// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)
						if ( texture.type !== UnsignedInt248Type ) {

							console.warn( 'THREE.WebGLRenderer: Use UnsignedInt248Type for DepthStencilFormat DepthTexture.' );

							texture.type = UnsignedInt248Type;
							glType = utils.convert( texture.type );

						}

					}

					//

					state.texImage2D( 3553, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, null );

				} else if ( texture.isDataTexture ) {

					// use manually created mipmaps if available
					// if there are no manual mipmaps
					// set 0 level mipmap and then use GL to generate other mipmap levels

					if ( mipmaps.length > 0 && supportsMips ) {

						for ( var i = 0, il = mipmaps.length; i < il; i ++ ) {

							mipmap = mipmaps[ i ];
							state.texImage2D( 3553, i, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );

						}

						texture.generateMipmaps = false;
						textureProperties.__maxMipLevel = mipmaps.length - 1;

					} else {

						state.texImage2D( 3553, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, image.data );
						textureProperties.__maxMipLevel = 0;

					}

				} else if ( texture.isCompressedTexture ) {

					for ( var i$1 = 0, il$1 = mipmaps.length; i$1 < il$1; i$1 ++ ) {

						mipmap = mipmaps[ i$1 ];

						if ( texture.format !== RGBAFormat && texture.format !== RGBFormat ) {

							if ( glFormat !== null ) {

								state.compressedTexImage2D( 3553, i$1, glInternalFormat, mipmap.width, mipmap.height, 0, mipmap.data );

							} else {

								console.warn( 'THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .uploadTexture()' );

							}

						} else {

							state.texImage2D( 3553, i$1, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );

						}

					}

					textureProperties.__maxMipLevel = mipmaps.length - 1;

				} else if ( texture.isDataTexture2DArray ) {

					state.texImage3D( 35866, 0, glInternalFormat, image.width, image.height, image.depth, 0, glFormat, glType, image.data );
					textureProperties.__maxMipLevel = 0;

				} else if ( texture.isDataTexture3D ) {

					state.texImage3D( 32879, 0, glInternalFormat, image.width, image.height, image.depth, 0, glFormat, glType, image.data );
					textureProperties.__maxMipLevel = 0;

				} else {

					// regular Texture (image, video, canvas)

					// use manually created mipmaps if available
					// if there are no manual mipmaps
					// set 0 level mipmap and then use GL to generate other mipmap levels

					if ( mipmaps.length > 0 && supportsMips ) {

						for ( var i$2 = 0, il$2 = mipmaps.length; i$2 < il$2; i$2 ++ ) {

							mipmap = mipmaps[ i$2 ];
							state.texImage2D( 3553, i$2, glInternalFormat, glFormat, glType, mipmap );

						}

						texture.generateMipmaps = false;
						textureProperties.__maxMipLevel = mipmaps.length - 1;

					} else {

						state.texImage2D( 3553, 0, glInternalFormat, glFormat, glType, image );
						textureProperties.__maxMipLevel = 0;

					}

				}

				if ( textureNeedsGenerateMipmaps( texture, supportsMips ) ) {

					generateMipmap( textureType, texture, image.width, image.height );

				}

				textureProperties.__version = texture.version;

				if ( texture.onUpdate ) { texture.onUpdate( texture ); }

			}

			// Render targets

			// Setup storage for target texture and bind it to correct framebuffer
			function setupFrameBufferTexture( framebuffer, renderTarget, attachment, textureTarget ) {

				var glFormat = utils.convert( renderTarget.texture.format );
				var glType = utils.convert( renderTarget.texture.type );
				var glInternalFormat = getInternalFormat( renderTarget.texture.internalFormat, glFormat, glType );
				state.texImage2D( textureTarget, 0, glInternalFormat, renderTarget.width, renderTarget.height, 0, glFormat, glType, null );
				_gl.bindFramebuffer( 36160, framebuffer );
				_gl.framebufferTexture2D( 36160, attachment, textureTarget, properties.get( renderTarget.texture ).__webglTexture, 0 );
				_gl.bindFramebuffer( 36160, null );

			}

			// Setup storage for internal depth/stencil buffers and bind to correct framebuffer
			function setupRenderBufferStorage( renderbuffer, renderTarget, isMultisample ) {

				_gl.bindRenderbuffer( 36161, renderbuffer );

				if ( renderTarget.depthBuffer && ! renderTarget.stencilBuffer ) {

					var glInternalFormat = 33189;

					if ( isMultisample ) {

						var depthTexture = renderTarget.depthTexture;

						if ( depthTexture && depthTexture.isDepthTexture ) {

							if ( depthTexture.type === FloatType ) {

								glInternalFormat = 36012;

							} else if ( depthTexture.type === UnsignedIntType ) {

								glInternalFormat = 33190;

							}

						}

						var samples = getRenderTargetSamples( renderTarget );

						_gl.renderbufferStorageMultisample( 36161, samples, glInternalFormat, renderTarget.width, renderTarget.height );

					} else {

						_gl.renderbufferStorage( 36161, glInternalFormat, renderTarget.width, renderTarget.height );

					}

					_gl.framebufferRenderbuffer( 36160, 36096, 36161, renderbuffer );

				} else if ( renderTarget.depthBuffer && renderTarget.stencilBuffer ) {

					if ( isMultisample ) {

						var samples$1 = getRenderTargetSamples( renderTarget );

						_gl.renderbufferStorageMultisample( 36161, samples$1, 35056, renderTarget.width, renderTarget.height );

					} else {

						_gl.renderbufferStorage( 36161, 34041, renderTarget.width, renderTarget.height );

					}


					_gl.framebufferRenderbuffer( 36160, 33306, 36161, renderbuffer );

				} else {

					var glFormat = utils.convert( renderTarget.texture.format );
					var glType = utils.convert( renderTarget.texture.type );
					var glInternalFormat$1 = getInternalFormat( renderTarget.texture.internalFormat, glFormat, glType );

					if ( isMultisample ) {

						var samples$2 = getRenderTargetSamples( renderTarget );

						_gl.renderbufferStorageMultisample( 36161, samples$2, glInternalFormat$1, renderTarget.width, renderTarget.height );

					} else {

						_gl.renderbufferStorage( 36161, glInternalFormat$1, renderTarget.width, renderTarget.height );

					}

				}

				_gl.bindRenderbuffer( 36161, null );

			}

			// Setup resources for a Depth Texture for a FBO (needs an extension)
			function setupDepthTexture( framebuffer, renderTarget ) {

				var isCube = ( renderTarget && renderTarget.isWebGLCubeRenderTarget );
				if ( isCube ) { throw new Error( 'Depth Texture with cube render targets is not supported' ); }

				_gl.bindFramebuffer( 36160, framebuffer );

				if ( ! ( renderTarget.depthTexture && renderTarget.depthTexture.isDepthTexture ) ) {

					throw new Error( 'renderTarget.depthTexture must be an instance of THREE.DepthTexture' );

				}

				// upload an empty depth texture with framebuffer size
				if ( ! properties.get( renderTarget.depthTexture ).__webglTexture ||
						renderTarget.depthTexture.image.width !== renderTarget.width ||
						renderTarget.depthTexture.image.height !== renderTarget.height ) {

					renderTarget.depthTexture.image.width = renderTarget.width;
					renderTarget.depthTexture.image.height = renderTarget.height;
					renderTarget.depthTexture.needsUpdate = true;

				}

				setTexture2D( renderTarget.depthTexture, 0 );

				var webglDepthTexture = properties.get( renderTarget.depthTexture ).__webglTexture;

				if ( renderTarget.depthTexture.format === DepthFormat ) {

					_gl.framebufferTexture2D( 36160, 36096, 3553, webglDepthTexture, 0 );

				} else if ( renderTarget.depthTexture.format === DepthStencilFormat ) {

					_gl.framebufferTexture2D( 36160, 33306, 3553, webglDepthTexture, 0 );

				} else {

					throw new Error( 'Unknown depthTexture format' );

				}

			}

			// Setup GL resources for a non-texture depth buffer
			function setupDepthRenderbuffer( renderTarget ) {

				var renderTargetProperties = properties.get( renderTarget );

				var isCube = ( renderTarget.isWebGLCubeRenderTarget === true );

				if ( renderTarget.depthTexture ) {

					if ( isCube ) { throw new Error( 'target.depthTexture not supported in Cube render targets' ); }

					setupDepthTexture( renderTargetProperties.__webglFramebuffer, renderTarget );

				} else {

					if ( isCube ) {

						renderTargetProperties.__webglDepthbuffer = [];

						for ( var i = 0; i < 6; i ++ ) {

							_gl.bindFramebuffer( 36160, renderTargetProperties.__webglFramebuffer[ i ] );
							renderTargetProperties.__webglDepthbuffer[ i ] = _gl.createRenderbuffer();
							setupRenderBufferStorage( renderTargetProperties.__webglDepthbuffer[ i ], renderTarget, false );

						}

					} else {

						_gl.bindFramebuffer( 36160, renderTargetProperties.__webglFramebuffer );
						renderTargetProperties.__webglDepthbuffer = _gl.createRenderbuffer();
						setupRenderBufferStorage( renderTargetProperties.__webglDepthbuffer, renderTarget, false );

					}

				}

				_gl.bindFramebuffer( 36160, null );

			}

			// Set up GL resources for the render target
			function setupRenderTarget( renderTarget ) {

				var renderTargetProperties = properties.get( renderTarget );
				var textureProperties = properties.get( renderTarget.texture );

				renderTarget.addEventListener( 'dispose', onRenderTargetDispose );

				textureProperties.__webglTexture = _gl.createTexture();

				info.memory.textures ++;

				var isCube = ( renderTarget.isWebGLCubeRenderTarget === true );
				var isMultisample = ( renderTarget.isWebGLMultisampleRenderTarget === true );
				var supportsMips = isPowerOfTwo( renderTarget ) || isWebGL2;

				// Handles WebGL2 RGBFormat fallback - #18858

				if ( isWebGL2 && renderTarget.texture.format === RGBFormat && ( renderTarget.texture.type === FloatType || renderTarget.texture.type === HalfFloatType ) ) {

					renderTarget.texture.format = RGBAFormat;

					console.warn( 'THREE.WebGLRenderer: Rendering to textures with RGB format is not supported. Using RGBA format instead.' );

				}

				// Setup framebuffer

				if ( isCube ) {

					renderTargetProperties.__webglFramebuffer = [];

					for ( var i = 0; i < 6; i ++ ) {

						renderTargetProperties.__webglFramebuffer[ i ] = _gl.createFramebuffer();

					}

				} else {

					renderTargetProperties.__webglFramebuffer = _gl.createFramebuffer();

					if ( isMultisample ) {

						if ( isWebGL2 ) {

							renderTargetProperties.__webglMultisampledFramebuffer = _gl.createFramebuffer();
							renderTargetProperties.__webglColorRenderbuffer = _gl.createRenderbuffer();

							_gl.bindRenderbuffer( 36161, renderTargetProperties.__webglColorRenderbuffer );

							var glFormat = utils.convert( renderTarget.texture.format );
							var glType = utils.convert( renderTarget.texture.type );
							var glInternalFormat = getInternalFormat( renderTarget.texture.internalFormat, glFormat, glType );
							var samples = getRenderTargetSamples( renderTarget );
							_gl.renderbufferStorageMultisample( 36161, samples, glInternalFormat, renderTarget.width, renderTarget.height );

							_gl.bindFramebuffer( 36160, renderTargetProperties.__webglMultisampledFramebuffer );
							_gl.framebufferRenderbuffer( 36160, 36064, 36161, renderTargetProperties.__webglColorRenderbuffer );
							_gl.bindRenderbuffer( 36161, null );

							if ( renderTarget.depthBuffer ) {

								renderTargetProperties.__webglDepthRenderbuffer = _gl.createRenderbuffer();
								setupRenderBufferStorage( renderTargetProperties.__webglDepthRenderbuffer, renderTarget, true );

							}

							_gl.bindFramebuffer( 36160, null );


						} else {

							console.warn( 'THREE.WebGLRenderer: WebGLMultisampleRenderTarget can only be used with WebGL2.' );

						}

					}

				}

				// Setup color buffer

				if ( isCube ) {

					state.bindTexture( 34067, textureProperties.__webglTexture );
					setTextureParameters( 34067, renderTarget.texture, supportsMips );

					for ( var i$1 = 0; i$1 < 6; i$1 ++ ) {

						setupFrameBufferTexture( renderTargetProperties.__webglFramebuffer[ i$1 ], renderTarget, 36064, 34069 + i$1 );

					}

					if ( textureNeedsGenerateMipmaps( renderTarget.texture, supportsMips ) ) {

						generateMipmap( 34067, renderTarget.texture, renderTarget.width, renderTarget.height );

					}

					state.bindTexture( 34067, null );

				} else {

					state.bindTexture( 3553, textureProperties.__webglTexture );
					setTextureParameters( 3553, renderTarget.texture, supportsMips );
					setupFrameBufferTexture( renderTargetProperties.__webglFramebuffer, renderTarget, 36064, 3553 );

					if ( textureNeedsGenerateMipmaps( renderTarget.texture, supportsMips ) ) {

						generateMipmap( 3553, renderTarget.texture, renderTarget.width, renderTarget.height );

					}

					state.bindTexture( 3553, null );

				}

				// Setup depth and stencil buffers

				if ( renderTarget.depthBuffer ) {

					setupDepthRenderbuffer( renderTarget );

				}

			}

			function updateRenderTargetMipmap( renderTarget ) {

				var texture = renderTarget.texture;
				var supportsMips = isPowerOfTwo( renderTarget ) || isWebGL2;

				if ( textureNeedsGenerateMipmaps( texture, supportsMips ) ) {

					var target = renderTarget.isWebGLCubeRenderTarget ? 34067 : 3553;
					var webglTexture = properties.get( texture ).__webglTexture;

					state.bindTexture( target, webglTexture );
					generateMipmap( target, texture, renderTarget.width, renderTarget.height );
					state.bindTexture( target, null );

				}

			}

			function updateMultisampleRenderTarget( renderTarget ) {

				if ( renderTarget.isWebGLMultisampleRenderTarget ) {

					if ( isWebGL2 ) {

						var renderTargetProperties = properties.get( renderTarget );

						_gl.bindFramebuffer( 36008, renderTargetProperties.__webglMultisampledFramebuffer );
						_gl.bindFramebuffer( 36009, renderTargetProperties.__webglFramebuffer );

						var width = renderTarget.width;
						var height = renderTarget.height;
						var mask = 16384;

						if ( renderTarget.depthBuffer ) { mask |= 256; }
						if ( renderTarget.stencilBuffer ) { mask |= 1024; }

						_gl.blitFramebuffer( 0, 0, width, height, 0, 0, width, height, mask, 9728 );

						_gl.bindFramebuffer( 36160, renderTargetProperties.__webglMultisampledFramebuffer ); // see #18905

					} else {

						console.warn( 'THREE.WebGLRenderer: WebGLMultisampleRenderTarget can only be used with WebGL2.' );

					}

				}

			}

			function getRenderTargetSamples( renderTarget ) {

				return ( isWebGL2 && renderTarget.isWebGLMultisampleRenderTarget ) ?
					Math.min( maxSamples, renderTarget.samples ) : 0;

			}

			function updateVideoTexture( texture ) {

				var frame = info.render.frame;

				// Check the last frame we updated the VideoTexture

				if ( _videoTextures.get( texture ) !== frame ) {

					_videoTextures.set( texture, frame );
					texture.update();

				}

			}

			// backwards compatibility

			var warnedTexture2D = false;
			var warnedTextureCube = false;

			function safeSetTexture2D( texture, slot ) {

				if ( texture && texture.isWebGLRenderTarget ) {

					if ( warnedTexture2D === false ) {

						console.warn( "THREE.WebGLTextures.safeSetTexture2D: don't use render targets as textures. Use their .texture property instead." );
						warnedTexture2D = true;

					}

					texture = texture.texture;

				}

				setTexture2D( texture, slot );

			}

			function safeSetTextureCube( texture, slot ) {

				if ( texture && texture.isWebGLCubeRenderTarget ) {

					if ( warnedTextureCube === false ) {

						console.warn( "THREE.WebGLTextures.safeSetTextureCube: don't use cube render targets as textures. Use their .texture property instead." );
						warnedTextureCube = true;

					}

					texture = texture.texture;

				}

				// currently relying on the fact that WebGLCubeRenderTarget.texture is a Texture and NOT a CubeTexture
				// TODO: unify these code paths
				if ( ( texture && texture.isCubeTexture ) ||
					( Array.isArray( texture.image ) && texture.image.length === 6 ) ) {

					// CompressedTexture can have Array in image :/

					// this function alone should take care of cube textures
					setTextureCube( texture, slot );

				} else {

					// assumed: texture property of THREE.WebGLCubeRenderTarget
					setTextureCubeDynamic( texture, slot );

				}

			}

			//

			this.allocateTextureUnit = allocateTextureUnit;
			this.resetTextureUnits = resetTextureUnits;

			this.setTexture2D = setTexture2D;
			this.setTexture2DArray = setTexture2DArray;
			this.setTexture3D = setTexture3D;
			this.setTextureCube = setTextureCube;
			this.setTextureCubeDynamic = setTextureCubeDynamic;
			this.setupRenderTarget = setupRenderTarget;
			this.updateRenderTargetMipmap = updateRenderTargetMipmap;
			this.updateMultisampleRenderTarget = updateMultisampleRenderTarget;

			this.safeSetTexture2D = safeSetTexture2D;
			this.safeSetTextureCube = safeSetTextureCube;

		}

		function WebGLUtils( gl, extensions, capabilities ) {

			var isWebGL2 = capabilities.isWebGL2;

			function convert( p ) {

				var extension;

				if ( p === UnsignedByteType ) { return 5121; }
				if ( p === UnsignedShort4444Type ) { return 32819; }
				if ( p === UnsignedShort5551Type ) { return 32820; }
				if ( p === UnsignedShort565Type ) { return 33635; }

				if ( p === ByteType ) { return 5120; }
				if ( p === ShortType ) { return 5122; }
				if ( p === UnsignedShortType ) { return 5123; }
				if ( p === IntType ) { return 5124; }
				if ( p === UnsignedIntType ) { return 5125; }
				if ( p === FloatType ) { return 5126; }

				if ( p === HalfFloatType ) {

					if ( isWebGL2 ) { return 5131; }

					extension = extensions.get( 'OES_texture_half_float' );

					if ( extension !== null ) {

						return extension.HALF_FLOAT_OES;

					} else {

						return null;

					}

				}

				if ( p === AlphaFormat ) { return 6406; }
				if ( p === RGBFormat ) { return 6407; }
				if ( p === RGBAFormat ) { return 6408; }
				if ( p === LuminanceFormat ) { return 6409; }
				if ( p === LuminanceAlphaFormat ) { return 6410; }
				if ( p === DepthFormat ) { return 6402; }
				if ( p === DepthStencilFormat ) { return 34041; }
				if ( p === RedFormat ) { return 6403; }

				// WebGL2 formats.

				if ( p === RedIntegerFormat ) { return 36244; }
				if ( p === RGFormat ) { return 33319; }
				if ( p === RGIntegerFormat ) { return 33320; }
				if ( p === RGBIntegerFormat ) { return 36248; }
				if ( p === RGBAIntegerFormat ) { return 36249; }

				if ( p === RGB_S3TC_DXT1_Format || p === RGBA_S3TC_DXT1_Format ||
					p === RGBA_S3TC_DXT3_Format || p === RGBA_S3TC_DXT5_Format ) {

					extension = extensions.get( 'WEBGL_compressed_texture_s3tc' );

					if ( extension !== null ) {

						if ( p === RGB_S3TC_DXT1_Format ) { return extension.COMPRESSED_RGB_S3TC_DXT1_EXT; }
						if ( p === RGBA_S3TC_DXT1_Format ) { return extension.COMPRESSED_RGBA_S3TC_DXT1_EXT; }
						if ( p === RGBA_S3TC_DXT3_Format ) { return extension.COMPRESSED_RGBA_S3TC_DXT3_EXT; }
						if ( p === RGBA_S3TC_DXT5_Format ) { return extension.COMPRESSED_RGBA_S3TC_DXT5_EXT; }

					} else {

						return null;

					}

				}

				if ( p === RGB_PVRTC_4BPPV1_Format || p === RGB_PVRTC_2BPPV1_Format ||
					p === RGBA_PVRTC_4BPPV1_Format || p === RGBA_PVRTC_2BPPV1_Format ) {

					extension = extensions.get( 'WEBGL_compressed_texture_pvrtc' );

					if ( extension !== null ) {

						if ( p === RGB_PVRTC_4BPPV1_Format ) { return extension.COMPRESSED_RGB_PVRTC_4BPPV1_IMG; }
						if ( p === RGB_PVRTC_2BPPV1_Format ) { return extension.COMPRESSED_RGB_PVRTC_2BPPV1_IMG; }
						if ( p === RGBA_PVRTC_4BPPV1_Format ) { return extension.COMPRESSED_RGBA_PVRTC_4BPPV1_IMG; }
						if ( p === RGBA_PVRTC_2BPPV1_Format ) { return extension.COMPRESSED_RGBA_PVRTC_2BPPV1_IMG; }

					} else {

						return null;

					}

				}

				if ( p === RGB_ETC1_Format ) {

					extension = extensions.get( 'WEBGL_compressed_texture_etc1' );

					if ( extension !== null ) {

						return extension.COMPRESSED_RGB_ETC1_WEBGL;

					} else {

						return null;

					}

				}

				if ( p === RGB_ETC2_Format || p === RGBA_ETC2_EAC_Format ) {

					extension = extensions.get( 'WEBGL_compressed_texture_etc' );

					if ( extension !== null ) {

						if ( p === RGB_ETC2_Format ) { return extension.COMPRESSED_RGB8_ETC2; }
						if ( p === RGBA_ETC2_EAC_Format ) { return extension.COMPRESSED_RGBA8_ETC2_EAC; }

					}

				}

				if ( p === RGBA_ASTC_4x4_Format || p === RGBA_ASTC_5x4_Format || p === RGBA_ASTC_5x5_Format ||
					p === RGBA_ASTC_6x5_Format || p === RGBA_ASTC_6x6_Format || p === RGBA_ASTC_8x5_Format ||
					p === RGBA_ASTC_8x6_Format || p === RGBA_ASTC_8x8_Format || p === RGBA_ASTC_10x5_Format ||
					p === RGBA_ASTC_10x6_Format || p === RGBA_ASTC_10x8_Format || p === RGBA_ASTC_10x10_Format ||
					p === RGBA_ASTC_12x10_Format || p === RGBA_ASTC_12x12_Format ||
					p === SRGB8_ALPHA8_ASTC_4x4_Format || p === SRGB8_ALPHA8_ASTC_5x4_Format || p === SRGB8_ALPHA8_ASTC_5x5_Format ||
					p === SRGB8_ALPHA8_ASTC_6x5_Format || p === SRGB8_ALPHA8_ASTC_6x6_Format || p === SRGB8_ALPHA8_ASTC_8x5_Format ||
					p === SRGB8_ALPHA8_ASTC_8x6_Format || p === SRGB8_ALPHA8_ASTC_8x8_Format || p === SRGB8_ALPHA8_ASTC_10x5_Format ||
					p === SRGB8_ALPHA8_ASTC_10x6_Format || p === SRGB8_ALPHA8_ASTC_10x8_Format || p === SRGB8_ALPHA8_ASTC_10x10_Format ||
					p === SRGB8_ALPHA8_ASTC_12x10_Format || p === SRGB8_ALPHA8_ASTC_12x12_Format ) {

					extension = extensions.get( 'WEBGL_compressed_texture_astc' );

					if ( extension !== null ) {

						// TODO Complete?

						return p;

					} else {

						return null;

					}

				}

				if ( p === RGBA_BPTC_Format ) {

					extension = extensions.get( 'EXT_texture_compression_bptc' );

					if ( extension !== null ) {

						// TODO Complete?

						return p;

					} else {

						return null;

					}

				}

				if ( p === UnsignedInt248Type ) {

					if ( isWebGL2 ) { return 34042; }

					extension = extensions.get( 'WEBGL_depth_texture' );

					if ( extension !== null ) {

						return extension.UNSIGNED_INT_24_8_WEBGL;

					} else {

						return null;

					}

				}

			}

			return { convert: convert };

		}

		function ArrayCamera( array ) {

			PerspectiveCamera.call( this );

			this.cameras = array || [];

		}

		ArrayCamera.prototype = Object.assign( Object.create( PerspectiveCamera.prototype ), {

			constructor: ArrayCamera,

			isArrayCamera: true

		} );

		function Group() {

			Object3D.call( this );

			this.type = 'Group';

		}

		Group.prototype = Object.assign( Object.create( Object3D.prototype ), {

			constructor: Group,

			isGroup: true

		} );

		function WebXRController() {

			this._targetRay = null;
			this._grip = null;
			this._hand = null;

		}

		Object.assign( WebXRController.prototype, {

			constructor: WebXRController,

			getHandSpace: function () {

				if ( this._hand === null ) {

					this._hand = new Group();
					this._hand.matrixAutoUpdate = false;
					this._hand.visible = false;

					this._hand.joints = [];
					this._hand.inputState = { pinching: false };

					if ( window.XRHand ) {

						for ( var i = 0; i <= window.XRHand.LITTLE_PHALANX_TIP; i ++ ) {

							// The transform of this joint will be updated with the joint pose on each frame
							var joint = new Group();
							joint.matrixAutoUpdate = false;
							joint.visible = false;
							this._hand.joints.push( joint );
							// ??
							this._hand.add( joint );

						}

					}

				}

				return this._hand;

			},

			getTargetRaySpace: function () {

				if ( this._targetRay === null ) {

					this._targetRay = new Group();
					this._targetRay.matrixAutoUpdate = false;
					this._targetRay.visible = false;

				}

				return this._targetRay;

			},

			getGripSpace: function () {

				if ( this._grip === null ) {

					this._grip = new Group();
					this._grip.matrixAutoUpdate = false;
					this._grip.visible = false;

				}

				return this._grip;

			},

			dispatchEvent: function ( event ) {

				if ( this._targetRay !== null ) {

					this._targetRay.dispatchEvent( event );

				}

				if ( this._grip !== null ) {

					this._grip.dispatchEvent( event );

				}

				if ( this._hand !== null ) {

					this._hand.dispatchEvent( event );

				}

				return this;

			},

			disconnect: function ( inputSource ) {

				this.dispatchEvent( { type: 'disconnected', data: inputSource } );

				if ( this._targetRay !== null ) {

					this._targetRay.visible = false;

				}

				if ( this._grip !== null ) {

					this._grip.visible = false;

				}

				if ( this._hand !== null ) {

					this._hand.visible = false;

				}

				return this;

			},

			update: function ( inputSource, frame, referenceSpace ) {

				var inputPose = null;
				var gripPose = null;
				var handPose = null;

				var targetRay = this._targetRay;
				var grip = this._grip;
				var hand = this._hand;

				if ( inputSource ) {

					if ( hand && inputSource.hand ) {

						handPose = true;

						for ( var i = 0; i <= window.XRHand.LITTLE_PHALANX_TIP; i ++ ) {

							if ( inputSource.hand[ i ] ) {

								// Update the joints groups with the XRJoint poses
								var jointPose = frame.getJointPose( inputSource.hand[ i ], referenceSpace );
								var joint = hand.joints[ i ];

								if ( jointPose !== null ) {

									joint.matrix.fromArray( jointPose.transform.matrix );
									joint.matrix.decompose( joint.position, joint.rotation, joint.scale );
									joint.jointRadius = jointPose.radius;

								}

								joint.visible = jointPose !== null;

								// Custom events

								// Check pinch
								var indexTip = hand.joints[ window.XRHand.INDEX_PHALANX_TIP ];
								var thumbTip = hand.joints[ window.XRHand.THUMB_PHALANX_TIP ];
								var distance = indexTip.position.distanceTo( thumbTip.position );

								var distanceToPinch = 0.02;
								var threshold = 0.005;

								if ( hand.inputState.pinching && distance > distanceToPinch + threshold ) {

									hand.inputState.pinching = false;
									this.dispatchEvent( {
										type: "pinchend",
										handedness: inputSource.handedness,
										target: this
									} );

								} else if ( ! hand.inputState.pinching && distance <= distanceToPinch - threshold ) {

									hand.inputState.pinching = true;
									this.dispatchEvent( {
										type: "pinchstart",
										handedness: inputSource.handedness,
										target: this
									} );

								}

							}

						}

					} else {

						if ( targetRay !== null ) {

							inputPose = frame.getPose( inputSource.targetRaySpace, referenceSpace );

							if ( inputPose !== null ) {

								targetRay.matrix.fromArray( inputPose.transform.matrix );
								targetRay.matrix.decompose( targetRay.position, targetRay.rotation, targetRay.scale );

							}

						}

						if ( grip !== null && inputSource.gripSpace ) {

							gripPose = frame.getPose( inputSource.gripSpace, referenceSpace );

							if ( gripPose !== null ) {

								grip.matrix.fromArray( gripPose.transform.matrix );
								grip.matrix.decompose( grip.position, grip.rotation, grip.scale );

							}

						}

					}

				}

				if ( targetRay !== null ) {

					targetRay.visible = ( inputPose !== null );

				}

				if ( grip !== null ) {

					grip.visible = ( gripPose !== null );

				}

				if ( hand !== null ) {

					hand.visible = ( handPose !== null );

				}

				return this;

			}

		} );

		function WebXRManager( renderer, gl ) {

			var scope = this;

			var session = null;

			var framebufferScaleFactor = 1.0;

			var referenceSpace = null;
			var referenceSpaceType = 'local-floor';

			var pose = null;

			var controllers = [];
			var inputSourcesMap = new Map();

			//

			var cameraL = new PerspectiveCamera();
			cameraL.layers.enable( 1 );
			cameraL.viewport = new Vector4();

			var cameraR = new PerspectiveCamera();
			cameraR.layers.enable( 2 );
			cameraR.viewport = new Vector4();

			var cameras = [ cameraL, cameraR ];

			var cameraVR = new ArrayCamera();
			cameraVR.layers.enable( 1 );
			cameraVR.layers.enable( 2 );

			var _currentDepthNear = null;
			var _currentDepthFar = null;

			//

			this.enabled = false;

			this.isPresenting = false;

			this.getController = function ( index ) {

				var controller = controllers[ index ];

				if ( controller === undefined ) {

					controller = new WebXRController();
					controllers[ index ] = controller;

				}

				return controller.getTargetRaySpace();

			};

			this.getControllerGrip = function ( index ) {

				var controller = controllers[ index ];

				if ( controller === undefined ) {

					controller = new WebXRController();
					controllers[ index ] = controller;

				}

				return controller.getGripSpace();

			};

			this.getHand = function ( index ) {

				var controller = controllers[ index ];

				if ( controller === undefined ) {

					controller = new WebXRController();
					controllers[ index ] = controller;

				}

				return controller.getHandSpace();

			};

			//

			function onSessionEvent( event ) {

				var controller = inputSourcesMap.get( event.inputSource );

				if ( controller ) {

					controller.dispatchEvent( { type: event.type } );

				}

			}

			function onSessionEnd() {

				inputSourcesMap.forEach( function ( controller, inputSource ) {

					controller.disconnect( inputSource );

				} );

				inputSourcesMap.clear();

				//

				renderer.setFramebuffer( null );
				renderer.setRenderTarget( renderer.getRenderTarget() ); // Hack #15830
				animation.stop();

				scope.isPresenting = false;

				scope.dispatchEvent( { type: 'sessionend' } );

			}

			function onRequestReferenceSpace( value ) {

				referenceSpace = value;

				animation.setContext( session );
				animation.start();

				scope.isPresenting = true;

				scope.dispatchEvent( { type: 'sessionstart' } );

			}

			this.setFramebufferScaleFactor = function ( value ) {

				framebufferScaleFactor = value;

				if ( scope.isPresenting === true ) {

					console.warn( 'THREE.WebXRManager: Cannot change framebuffer scale while presenting.' );

				}

			};

			this.setReferenceSpaceType = function ( value ) {

				referenceSpaceType = value;

				if ( scope.isPresenting === true ) {

					console.warn( 'THREE.WebXRManager: Cannot change reference space type while presenting.' );

				}

			};

			this.getReferenceSpace = function () {

				return referenceSpace;

			};

			this.getSession = function () {

				return session;

			};

			this.setSession = function ( value ) {

				session = value;

				if ( session !== null ) {

					session.addEventListener( 'select', onSessionEvent );
					session.addEventListener( 'selectstart', onSessionEvent );
					session.addEventListener( 'selectend', onSessionEvent );
					session.addEventListener( 'squeeze', onSessionEvent );
					session.addEventListener( 'squeezestart', onSessionEvent );
					session.addEventListener( 'squeezeend', onSessionEvent );
					session.addEventListener( 'end', onSessionEnd );

					var attributes = gl.getContextAttributes();

					if ( attributes.xrCompatible !== true ) {

						gl.makeXRCompatible();

					}

					var layerInit = {
						antialias: attributes.antialias,
						alpha: attributes.alpha,
						depth: attributes.depth,
						stencil: attributes.stencil,
						framebufferScaleFactor: framebufferScaleFactor
					};

					// eslint-disable-next-line no-undef
					var baseLayer = new XRWebGLLayer( session, gl, layerInit );

					session.updateRenderState( { baseLayer: baseLayer } );

					session.requestReferenceSpace( referenceSpaceType ).then( onRequestReferenceSpace );

					//

					session.addEventListener( 'inputsourceschange', updateInputSources );

				}

			};

			function updateInputSources( event ) {

				var inputSources = session.inputSources;

				// Assign inputSources to available controllers

				for ( var i = 0; i < controllers.length; i ++ ) {

					inputSourcesMap.set( inputSources[ i ], controllers[ i ] );

				}

				// Notify disconnected

				for ( var i$1 = 0; i$1 < event.removed.length; i$1 ++ ) {

					var inputSource = event.removed[ i$1 ];
					var controller = inputSourcesMap.get( inputSource );

					if ( controller ) {

						controller.dispatchEvent( { type: 'disconnected', data: inputSource } );
						inputSourcesMap.delete( inputSource );

					}

				}

				// Notify connected

				for ( var i$2 = 0; i$2 < event.added.length; i$2 ++ ) {

					var inputSource$1 = event.added[ i$2 ];
					var controller$1 = inputSourcesMap.get( inputSource$1 );

					if ( controller$1 ) {

						controller$1.dispatchEvent( { type: 'connected', data: inputSource$1 } );

					}

				}

			}

			//

			var cameraLPos = new Vector3();
			var cameraRPos = new Vector3();

			/**
			 * Assumes 2 cameras that are parallel and share an X-axis, and that
			 * the cameras' projection and world matrices have already been set.
			 * And that near and far planes are identical for both cameras.
			 * Visualization of this technique: https://computergraphics.stackexchange.com/a/4765
			 */
			function setProjectionFromUnion( camera, cameraL, cameraR ) {

				cameraLPos.setFromMatrixPosition( cameraL.matrixWorld );
				cameraRPos.setFromMatrixPosition( cameraR.matrixWorld );

				var ipd = cameraLPos.distanceTo( cameraRPos );

				var projL = cameraL.projectionMatrix.elements;
				var projR = cameraR.projectionMatrix.elements;

				// VR systems will have identical far and near planes, and
				// most likely identical top and bottom frustum extents.
				// Use the left camera for these values.
				var near = projL[ 14 ] / ( projL[ 10 ] - 1 );
				var far = projL[ 14 ] / ( projL[ 10 ] + 1 );
				var topFov = ( projL[ 9 ] + 1 ) / projL[ 5 ];
				var bottomFov = ( projL[ 9 ] - 1 ) / projL[ 5 ];

				var leftFov = ( projL[ 8 ] - 1 ) / projL[ 0 ];
				var rightFov = ( projR[ 8 ] + 1 ) / projR[ 0 ];
				var left = near * leftFov;
				var right = near * rightFov;

				// Calculate the new camera's position offset from the
				// left camera. xOffset should be roughly half `ipd`.
				var zOffset = ipd / ( - leftFov + rightFov );
				var xOffset = zOffset * - leftFov;

				// TODO: Better way to apply this offset?
				cameraL.matrixWorld.decompose( camera.position, camera.quaternion, camera.scale );
				camera.translateX( xOffset );
				camera.translateZ( zOffset );
				camera.matrixWorld.compose( camera.position, camera.quaternion, camera.scale );
				camera.matrixWorldInverse.getInverse( camera.matrixWorld );

				// Find the union of the frustum values of the cameras and scale
				// the values so that the near plane's position does not change in world space,
				// although must now be relative to the new union camera.
				var near2 = near + zOffset;
				var far2 = far + zOffset;
				var left2 = left - xOffset;
				var right2 = right + ( ipd - xOffset );
				var top2 = topFov * far / far2 * near2;
				var bottom2 = bottomFov * far / far2 * near2;

				camera.projectionMatrix.makePerspective( left2, right2, top2, bottom2, near2, far2 );

			}

			function updateCamera( camera, parent ) {

				if ( parent === null ) {

					camera.matrixWorld.copy( camera.matrix );

				} else {

					camera.matrixWorld.multiplyMatrices( parent.matrixWorld, camera.matrix );

				}

				camera.matrixWorldInverse.getInverse( camera.matrixWorld );

			}

			this.getCamera = function ( camera ) {

				cameraVR.near = cameraR.near = cameraL.near = camera.near;
				cameraVR.far = cameraR.far = cameraL.far = camera.far;

				if ( _currentDepthNear !== cameraVR.near || _currentDepthFar !== cameraVR.far ) {

					// Note that the new renderState won't apply until the next frame. See #18320

					session.updateRenderState( {
						depthNear: cameraVR.near,
						depthFar: cameraVR.far
					} );

					_currentDepthNear = cameraVR.near;
					_currentDepthFar = cameraVR.far;

				}

				var parent = camera.parent;
				var cameras = cameraVR.cameras;

				updateCamera( cameraVR, parent );

				for ( var i = 0; i < cameras.length; i ++ ) {

					updateCamera( cameras[ i ], parent );

				}

				// update camera and its children

				camera.matrixWorld.copy( cameraVR.matrixWorld );

				var children = camera.children;

				for ( var i$1 = 0, l = children.length; i$1 < l; i$1 ++ ) {

					children[ i$1 ].updateMatrixWorld( true );

				}

				// update projection matrix for proper view frustum culling

				if ( cameras.length === 2 ) {

					setProjectionFromUnion( cameraVR, cameraL, cameraR );

				} else {

					// assume single camera setup (AR)

					cameraVR.projectionMatrix.copy( cameraL.projectionMatrix );

				}

				return cameraVR;

			};

			// Animation Loop

			var onAnimationFrameCallback = null;

			function onAnimationFrame( time, frame ) {

				pose = frame.getViewerPose( referenceSpace );

				if ( pose !== null ) {

					var views = pose.views;
					var baseLayer = session.renderState.baseLayer;

					renderer.setFramebuffer( baseLayer.framebuffer );

					var cameraVRNeedsUpdate = false;

					// check if it's necessary to rebuild cameraVR's camera list

					if ( views.length !== cameraVR.cameras.length ) {

						cameraVR.cameras.length = 0;
						cameraVRNeedsUpdate = true;

					}

					for ( var i = 0; i < views.length; i ++ ) {

						var view = views[ i ];
						var viewport = baseLayer.getViewport( view );

						var camera = cameras[ i ];
						camera.matrix.fromArray( view.transform.matrix );
						camera.projectionMatrix.fromArray( view.projectionMatrix );
						camera.viewport.set( viewport.x, viewport.y, viewport.width, viewport.height );

						if ( i === 0 ) {

							cameraVR.matrix.copy( camera.matrix );

						}

						if ( cameraVRNeedsUpdate === true ) {

							cameraVR.cameras.push( camera );

						}

					}

				}

				//

				var inputSources = session.inputSources;

				for ( var i$1 = 0; i$1 < controllers.length; i$1 ++ ) {

					var controller = controllers[ i$1 ];
					var inputSource = inputSources[ i$1 ];

					controller.update( inputSource, frame, referenceSpace );

				}

				if ( onAnimationFrameCallback ) { onAnimationFrameCallback( time, frame ); }

			}

			var animation = new WebGLAnimation();
			animation.setAnimationLoop( onAnimationFrame );

			this.setAnimationLoop = function ( callback ) {

				onAnimationFrameCallback = callback;

			};

			this.dispose = function () {};

		}

		Object.assign( WebXRManager.prototype, EventDispatcher.prototype );

		function WebGLMaterials( properties ) {

			function refreshFogUniforms( uniforms, fog ) {

				uniforms.fogColor.value.copy( fog.color );

				if ( fog.isFog ) {

					uniforms.fogNear.value = fog.near;
					uniforms.fogFar.value = fog.far;

				} else if ( fog.isFogExp2 ) {

					uniforms.fogDensity.value = fog.density;

				}

			}

			function refreshMaterialUniforms( uniforms, material, pixelRatio, height ) {

				if ( material.isMeshBasicMaterial ) {

					refreshUniformsCommon( uniforms, material );

				} else if ( material.isMeshLambertMaterial ) {

					refreshUniformsCommon( uniforms, material );
					refreshUniformsLambert( uniforms, material );

				} else if ( material.isMeshToonMaterial ) {

					refreshUniformsCommon( uniforms, material );
					refreshUniformsToon( uniforms, material );

				} else if ( material.isMeshPhongMaterial ) {

					refreshUniformsCommon( uniforms, material );
					refreshUniformsPhong( uniforms, material );

				} else if ( material.isMeshStandardMaterial ) {

					refreshUniformsCommon( uniforms, material );

					if ( material.isMeshPhysicalMaterial ) {

						refreshUniformsPhysical( uniforms, material );

					} else {

						refreshUniformsStandard( uniforms, material );

					}

				} else if ( material.isMeshMatcapMaterial ) {

					refreshUniformsCommon( uniforms, material );
					refreshUniformsMatcap( uniforms, material );

				} else if ( material.isMeshDepthMaterial ) {

					refreshUniformsCommon( uniforms, material );
					refreshUniformsDepth( uniforms, material );

				} else if ( material.isMeshDistanceMaterial ) {

					refreshUniformsCommon( uniforms, material );
					refreshUniformsDistance( uniforms, material );

				} else if ( material.isMeshNormalMaterial ) {

					refreshUniformsCommon( uniforms, material );
					refreshUniformsNormal( uniforms, material );

				} else if ( material.isLineBasicMaterial ) {

					refreshUniformsLine( uniforms, material );

					if ( material.isLineDashedMaterial ) {

						refreshUniformsDash( uniforms, material );

					}

				} else if ( material.isPointsMaterial ) {

					refreshUniformsPoints( uniforms, material, pixelRatio, height );

				} else if ( material.isSpriteMaterial ) {

					refreshUniformsSprites( uniforms, material );

				} else if ( material.isShadowMaterial ) {

					uniforms.color.value.copy( material.color );
					uniforms.opacity.value = material.opacity;

				} else if ( material.isShaderMaterial ) {

					material.uniformsNeedUpdate = false; // #15581

				}

			}

			function refreshUniformsCommon( uniforms, material ) {

				uniforms.opacity.value = material.opacity;

				if ( material.color ) {

					uniforms.diffuse.value.copy( material.color );

				}

				if ( material.emissive ) {

					uniforms.emissive.value.copy( material.emissive ).multiplyScalar( material.emissiveIntensity );

				}

				if ( material.map ) {

					uniforms.map.value = material.map;

				}

				if ( material.alphaMap ) {

					uniforms.alphaMap.value = material.alphaMap;

				}

				if ( material.specularMap ) {

					uniforms.specularMap.value = material.specularMap;

				}

				var envMap = properties.get( material ).envMap;

				if ( envMap ) {

					uniforms.envMap.value = envMap;

					uniforms.flipEnvMap.value = envMap.isCubeTexture ? - 1 : 1;

					uniforms.reflectivity.value = material.reflectivity;
					uniforms.refractionRatio.value = material.refractionRatio;

					var maxMipLevel = properties.get( envMap ).__maxMipLevel;

					if ( maxMipLevel !== undefined ) {

						uniforms.maxMipLevel.value = maxMipLevel;

					}

				}

				if ( material.lightMap ) {

					uniforms.lightMap.value = material.lightMap;
					uniforms.lightMapIntensity.value = material.lightMapIntensity;

				}

				if ( material.aoMap ) {

					uniforms.aoMap.value = material.aoMap;
					uniforms.aoMapIntensity.value = material.aoMapIntensity;

				}

				// uv repeat and offset setting priorities
				// 1. color map
				// 2. specular map
				// 3. displacementMap map
				// 4. normal map
				// 5. bump map
				// 6. roughnessMap map
				// 7. metalnessMap map
				// 8. alphaMap map
				// 9. emissiveMap map
				// 10. clearcoat map
				// 11. clearcoat normal map
				// 12. clearcoat roughnessMap map

				var uvScaleMap;

				if ( material.map ) {

					uvScaleMap = material.map;

				} else if ( material.specularMap ) {

					uvScaleMap = material.specularMap;

				} else if ( material.displacementMap ) {

					uvScaleMap = material.displacementMap;

				} else if ( material.normalMap ) {

					uvScaleMap = material.normalMap;

				} else if ( material.bumpMap ) {

					uvScaleMap = material.bumpMap;

				} else if ( material.roughnessMap ) {

					uvScaleMap = material.roughnessMap;

				} else if ( material.metalnessMap ) {

					uvScaleMap = material.metalnessMap;

				} else if ( material.alphaMap ) {

					uvScaleMap = material.alphaMap;

				} else if ( material.emissiveMap ) {

					uvScaleMap = material.emissiveMap;

				} else if ( material.clearcoatMap ) {

					uvScaleMap = material.clearcoatMap;

				} else if ( material.clearcoatNormalMap ) {

					uvScaleMap = material.clearcoatNormalMap;

				} else if ( material.clearcoatRoughnessMap ) {

					uvScaleMap = material.clearcoatRoughnessMap;

				}

				if ( uvScaleMap !== undefined ) {

					// backwards compatibility
					if ( uvScaleMap.isWebGLRenderTarget ) {

						uvScaleMap = uvScaleMap.texture;

					}

					if ( uvScaleMap.matrixAutoUpdate === true ) {

						uvScaleMap.updateMatrix();

					}

					uniforms.uvTransform.value.copy( uvScaleMap.matrix );

				}

				// uv repeat and offset setting priorities for uv2
				// 1. ao map
				// 2. light map

				var uv2ScaleMap;

				if ( material.aoMap ) {

					uv2ScaleMap = material.aoMap;

				} else if ( material.lightMap ) {

					uv2ScaleMap = material.lightMap;

				}

				if ( uv2ScaleMap !== undefined ) {

					// backwards compatibility
					if ( uv2ScaleMap.isWebGLRenderTarget ) {

						uv2ScaleMap = uv2ScaleMap.texture;

					}

					if ( uv2ScaleMap.matrixAutoUpdate === true ) {

						uv2ScaleMap.updateMatrix();

					}

					uniforms.uv2Transform.value.copy( uv2ScaleMap.matrix );

				}

			}

			function refreshUniformsLine( uniforms, material ) {

				uniforms.diffuse.value.copy( material.color );
				uniforms.opacity.value = material.opacity;

			}

			function refreshUniformsDash( uniforms, material ) {

				uniforms.dashSize.value = material.dashSize;
				uniforms.totalSize.value = material.dashSize + material.gapSize;
				uniforms.scale.value = material.scale;

			}

			function refreshUniformsPoints( uniforms, material, pixelRatio, height ) {

				uniforms.diffuse.value.copy( material.color );
				uniforms.opacity.value = material.opacity;
				uniforms.size.value = material.size * pixelRatio;
				uniforms.scale.value = height * 0.5;

				if ( material.map ) {

					uniforms.map.value = material.map;

				}

				if ( material.alphaMap ) {

					uniforms.alphaMap.value = material.alphaMap;

				}

				// uv repeat and offset setting priorities
				// 1. color map
				// 2. alpha map

				var uvScaleMap;

				if ( material.map ) {

					uvScaleMap = material.map;

				} else if ( material.alphaMap ) {

					uvScaleMap = material.alphaMap;

				}

				if ( uvScaleMap !== undefined ) {

					if ( uvScaleMap.matrixAutoUpdate === true ) {

						uvScaleMap.updateMatrix();

					}

					uniforms.uvTransform.value.copy( uvScaleMap.matrix );

				}

			}

			function refreshUniformsSprites( uniforms, material ) {

				uniforms.diffuse.value.copy( material.color );
				uniforms.opacity.value = material.opacity;
				uniforms.rotation.value = material.rotation;

				if ( material.map ) {

					uniforms.map.value = material.map;

				}

				if ( material.alphaMap ) {

					uniforms.alphaMap.value = material.alphaMap;

				}

				// uv repeat and offset setting priorities
				// 1. color map
				// 2. alpha map

				var uvScaleMap;

				if ( material.map ) {

					uvScaleMap = material.map;

				} else if ( material.alphaMap ) {

					uvScaleMap = material.alphaMap;

				}

				if ( uvScaleMap !== undefined ) {

					if ( uvScaleMap.matrixAutoUpdate === true ) {

						uvScaleMap.updateMatrix();

					}

					uniforms.uvTransform.value.copy( uvScaleMap.matrix );

				}

			}

			function refreshUniformsLambert( uniforms, material ) {

				if ( material.emissiveMap ) {

					uniforms.emissiveMap.value = material.emissiveMap;

				}

			}

			function refreshUniformsPhong( uniforms, material ) {

				uniforms.specular.value.copy( material.specular );
				uniforms.shininess.value = Math.max( material.shininess, 1e-4 ); // to prevent pow( 0.0, 0.0 )

				if ( material.emissiveMap ) {

					uniforms.emissiveMap.value = material.emissiveMap;

				}

				if ( material.bumpMap ) {

					uniforms.bumpMap.value = material.bumpMap;
					uniforms.bumpScale.value = material.bumpScale;
					if ( material.side === BackSide ) { uniforms.bumpScale.value *= - 1; }

				}

				if ( material.normalMap ) {

					uniforms.normalMap.value = material.normalMap;
					uniforms.normalScale.value.copy( material.normalScale );
					if ( material.side === BackSide ) { uniforms.normalScale.value.negate(); }

				}

				if ( material.displacementMap ) {

					uniforms.displacementMap.value = material.displacementMap;
					uniforms.displacementScale.value = material.displacementScale;
					uniforms.displacementBias.value = material.displacementBias;

				}

			}

			function refreshUniformsToon( uniforms, material ) {

				if ( material.gradientMap ) {

					uniforms.gradientMap.value = material.gradientMap;

				}

				if ( material.emissiveMap ) {

					uniforms.emissiveMap.value = material.emissiveMap;

				}

				if ( material.bumpMap ) {

					uniforms.bumpMap.value = material.bumpMap;
					uniforms.bumpScale.value = material.bumpScale;
					if ( material.side === BackSide ) { uniforms.bumpScale.value *= - 1; }

				}

				if ( material.normalMap ) {

					uniforms.normalMap.value = material.normalMap;
					uniforms.normalScale.value.copy( material.normalScale );
					if ( material.side === BackSide ) { uniforms.normalScale.value.negate(); }

				}

				if ( material.displacementMap ) {

					uniforms.displacementMap.value = material.displacementMap;
					uniforms.displacementScale.value = material.displacementScale;
					uniforms.displacementBias.value = material.displacementBias;

				}

			}

			function refreshUniformsStandard( uniforms, material ) {

				uniforms.roughness.value = material.roughness;
				uniforms.metalness.value = material.metalness;

				if ( material.roughnessMap ) {

					uniforms.roughnessMap.value = material.roughnessMap;

				}

				if ( material.metalnessMap ) {

					uniforms.metalnessMap.value = material.metalnessMap;

				}

				if ( material.emissiveMap ) {

					uniforms.emissiveMap.value = material.emissiveMap;

				}

				if ( material.bumpMap ) {

					uniforms.bumpMap.value = material.bumpMap;
					uniforms.bumpScale.value = material.bumpScale;
					if ( material.side === BackSide ) { uniforms.bumpScale.value *= - 1; }

				}

				if ( material.normalMap ) {

					uniforms.normalMap.value = material.normalMap;
					uniforms.normalScale.value.copy( material.normalScale );
					if ( material.side === BackSide ) { uniforms.normalScale.value.negate(); }

				}

				if ( material.displacementMap ) {

					uniforms.displacementMap.value = material.displacementMap;
					uniforms.displacementScale.value = material.displacementScale;
					uniforms.displacementBias.value = material.displacementBias;

				}

				var envMap = properties.get( material ).envMap;

				if ( envMap ) {

					//uniforms.envMap.value = material.envMap; // part of uniforms common
					uniforms.envMapIntensity.value = material.envMapIntensity;

				}

			}

			function refreshUniformsPhysical( uniforms, material ) {

				refreshUniformsStandard( uniforms, material );

				uniforms.reflectivity.value = material.reflectivity; // also part of uniforms common

				uniforms.clearcoat.value = material.clearcoat;
				uniforms.clearcoatRoughness.value = material.clearcoatRoughness;
				if ( material.sheen ) { uniforms.sheen.value.copy( material.sheen ); }

				if ( material.clearcoatMap ) {

					uniforms.clearcoatMap.value = material.clearcoatMap;

				}

				if ( material.clearcoatRoughnessMap ) {

					uniforms.clearcoatRoughnessMap.value = material.clearcoatRoughnessMap;

				}

				if ( material.clearcoatNormalMap ) {

					uniforms.clearcoatNormalScale.value.copy( material.clearcoatNormalScale );
					uniforms.clearcoatNormalMap.value = material.clearcoatNormalMap;

					if ( material.side === BackSide ) {

						uniforms.clearcoatNormalScale.value.negate();

					}

				}

				uniforms.transmission.value = material.transmission;

				if ( material.transmissionMap ) {

					uniforms.transmissionMap.value = material.transmissionMap;

				}

			}

			function refreshUniformsMatcap( uniforms, material ) {

				if ( material.matcap ) {

					uniforms.matcap.value = material.matcap;

				}

				if ( material.bumpMap ) {

					uniforms.bumpMap.value = material.bumpMap;
					uniforms.bumpScale.value = material.bumpScale;
					if ( material.side === BackSide ) { uniforms.bumpScale.value *= - 1; }

				}

				if ( material.normalMap ) {

					uniforms.normalMap.value = material.normalMap;
					uniforms.normalScale.value.copy( material.normalScale );
					if ( material.side === BackSide ) { uniforms.normalScale.value.negate(); }

				}

				if ( material.displacementMap ) {

					uniforms.displacementMap.value = material.displacementMap;
					uniforms.displacementScale.value = material.displacementScale;
					uniforms.displacementBias.value = material.displacementBias;

				}

			}

			function refreshUniformsDepth( uniforms, material ) {

				if ( material.displacementMap ) {

					uniforms.displacementMap.value = material.displacementMap;
					uniforms.displacementScale.value = material.displacementScale;
					uniforms.displacementBias.value = material.displacementBias;

				}

			}

			function refreshUniformsDistance( uniforms, material ) {

				if ( material.displacementMap ) {

					uniforms.displacementMap.value = material.displacementMap;
					uniforms.displacementScale.value = material.displacementScale;
					uniforms.displacementBias.value = material.displacementBias;

				}

				uniforms.referencePosition.value.copy( material.referencePosition );
				uniforms.nearDistance.value = material.nearDistance;
				uniforms.farDistance.value = material.farDistance;

			}

			function refreshUniformsNormal( uniforms, material ) {

				if ( material.bumpMap ) {

					uniforms.bumpMap.value = material.bumpMap;
					uniforms.bumpScale.value = material.bumpScale;
					if ( material.side === BackSide ) { uniforms.bumpScale.value *= - 1; }

				}

				if ( material.normalMap ) {

					uniforms.normalMap.value = material.normalMap;
					uniforms.normalScale.value.copy( material.normalScale );
					if ( material.side === BackSide ) { uniforms.normalScale.value.negate(); }

				}

				if ( material.displacementMap ) {

					uniforms.displacementMap.value = material.displacementMap;
					uniforms.displacementScale.value = material.displacementScale;
					uniforms.displacementBias.value = material.displacementBias;

				}

			}

			return {
				refreshFogUniforms: refreshFogUniforms,
				refreshMaterialUniforms: refreshMaterialUniforms
			};

		}

		function WebGLRenderer( parameters ) {

			parameters = parameters || {};

			var _canvas = parameters.canvas !== undefined ? parameters.canvas : document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' ),
				_context = parameters.context !== undefined ? parameters.context : null,

				_alpha = parameters.alpha !== undefined ? parameters.alpha : false,
				_depth = parameters.depth !== undefined ? parameters.depth : true,
				_stencil = parameters.stencil !== undefined ? parameters.stencil : true,
				_antialias = parameters.antialias !== undefined ? parameters.antialias : false,
				_premultipliedAlpha = parameters.premultipliedAlpha !== undefined ? parameters.premultipliedAlpha : true,
				_preserveDrawingBuffer = parameters.preserveDrawingBuffer !== undefined ? parameters.preserveDrawingBuffer : false,
				_powerPreference = parameters.powerPreference !== undefined ? parameters.powerPreference : 'default',
				_failIfMajorPerformanceCaveat = parameters.failIfMajorPerformanceCaveat !== undefined ? parameters.failIfMajorPerformanceCaveat : false;

			var currentRenderList = null;
			var currentRenderState = null;

			// public properties

			this.domElement = _canvas;

			// Debug configuration container
			this.debug = {

				/**
				 * Enables error checking and reporting when shader programs are being compiled
				 * @type {boolean}
				 */
				checkShaderErrors: true
			};

			// clearing

			this.autoClear = true;
			this.autoClearColor = true;
			this.autoClearDepth = true;
			this.autoClearStencil = true;

			// scene graph

			this.sortObjects = true;

			// user-defined clipping

			this.clippingPlanes = [];
			this.localClippingEnabled = false;

			// physically based shading

			this.gammaFactor = 2.0;	// for backwards compatibility
			this.outputEncoding = LinearEncoding;

			// physical lights

			this.physicallyCorrectLights = false;

			// tone mapping

			this.toneMapping = NoToneMapping;
			this.toneMappingExposure = 1.0;

			// morphs

			this.maxMorphTargets = 8;
			this.maxMorphNormals = 4;

			// internal properties

			var _this = this;

			var _isContextLost = false;

			// internal state cache

			var _framebuffer = null;

			var _currentActiveCubeFace = 0;
			var _currentActiveMipmapLevel = 0;
			var _currentRenderTarget = null;
			var _currentFramebuffer = null;
			var _currentMaterialId = - 1;

			var _currentCamera = null;
			var _currentArrayCamera = null;

			var _currentViewport = new Vector4();
			var _currentScissor = new Vector4();
			var _currentScissorTest = null;

			//

			var _width = _canvas.width;
			var _height = _canvas.height;

			var _pixelRatio = 1;
			var _opaqueSort = null;
			var _transparentSort = null;

			var _viewport = new Vector4( 0, 0, _width, _height );
			var _scissor = new Vector4( 0, 0, _width, _height );
			var _scissorTest = false;

			// frustum

			var _frustum = new Frustum();

			// clipping

			var _clippingEnabled = false;
			var _localClippingEnabled = false;

			// camera matrices cache

			var _projScreenMatrix = new Matrix4();

			var _vector3 = new Vector3();

			var _emptyScene = { background: null, fog: null, environment: null, overrideMaterial: null, isScene: true };

			function getTargetPixelRatio() {

				return _currentRenderTarget === null ? _pixelRatio : 1;

			}

			// initialize

			var _gl = _context;

			function getContext( contextNames, contextAttributes ) {

				for ( var i = 0; i < contextNames.length; i ++ ) {

					var contextName = contextNames[ i ];
					var context = _canvas.getContext( contextName, contextAttributes );
					if ( context !== null ) { return context; }

				}

				return null;

			}

			try {

				var contextAttributes = {
					alpha: _alpha,
					depth: _depth,
					stencil: _stencil,
					antialias: _antialias,
					premultipliedAlpha: _premultipliedAlpha,
					preserveDrawingBuffer: _preserveDrawingBuffer,
					powerPreference: _powerPreference,
					failIfMajorPerformanceCaveat: _failIfMajorPerformanceCaveat
				};

				// event listeners must be registered before WebGL context is created, see #12753

				_canvas.addEventListener( 'webglcontextlost', onContextLost, false );
				_canvas.addEventListener( 'webglcontextrestored', onContextRestore, false );

				if ( _gl === null ) {

					var contextNames = [ 'webgl2', 'webgl', 'experimental-webgl' ];

					if ( _this.isWebGL1Renderer === true ) {

						contextNames.shift();

					}

					_gl = getContext( contextNames, contextAttributes );

					if ( _gl === null ) {

						if ( getContext( contextNames ) ) {

							throw new Error( 'Error creating WebGL context with your selected attributes.' );

						} else {

							throw new Error( 'Error creating WebGL context.' );

						}

					}

				}

				// Some experimental-webgl implementations do not have getShaderPrecisionFormat

				if ( _gl.getShaderPrecisionFormat === undefined ) {

					_gl.getShaderPrecisionFormat = function () {

						return { 'rangeMin': 1, 'rangeMax': 1, 'precision': 1 };

					};

				}

			} catch ( error ) {

				console.error( 'THREE.WebGLRenderer: ' + error.message );
				throw error;

			}

			var extensions, capabilities, state, info;
			var properties, textures, cubemaps, attributes, geometries, objects;
			var programCache, materials, renderLists, renderStates, clipping;

			var background, morphtargets, bufferRenderer, indexedBufferRenderer;

			var utils, bindingStates;

			function initGLContext() {

				extensions = new WebGLExtensions( _gl );

				capabilities = new WebGLCapabilities( _gl, extensions, parameters );

				if ( capabilities.isWebGL2 === false ) {

					extensions.get( 'WEBGL_depth_texture' );
					extensions.get( 'OES_texture_float' );
					extensions.get( 'OES_texture_half_float' );
					extensions.get( 'OES_texture_half_float_linear' );
					extensions.get( 'OES_standard_derivatives' );
					extensions.get( 'OES_element_index_uint' );
					extensions.get( 'OES_vertex_array_object' );
					extensions.get( 'ANGLE_instanced_arrays' );

				}

				extensions.get( 'OES_texture_float_linear' );

				utils = new WebGLUtils( _gl, extensions, capabilities );

				state = new WebGLState( _gl, extensions, capabilities );
				state.scissor( _currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ).floor() );
				state.viewport( _currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ).floor() );

				info = new WebGLInfo( _gl );
				properties = new WebGLProperties();
				textures = new WebGLTextures( _gl, extensions, state, properties, capabilities, utils, info );
				cubemaps = new WebGLCubeMaps( _this );
				attributes = new WebGLAttributes( _gl, capabilities );
				bindingStates = new WebGLBindingStates( _gl, extensions, attributes, capabilities );
				geometries = new WebGLGeometries( _gl, attributes, info, bindingStates );
				objects = new WebGLObjects( _gl, geometries, attributes, info );
				morphtargets = new WebGLMorphtargets( _gl );
				clipping = new WebGLClipping( properties );
				programCache = new WebGLPrograms( _this, cubemaps, extensions, capabilities, bindingStates, clipping );
				materials = new WebGLMaterials( properties );
				renderLists = new WebGLRenderLists( properties );
				renderStates = new WebGLRenderStates();
				background = new WebGLBackground( _this, cubemaps, state, objects, _premultipliedAlpha );

				bufferRenderer = new WebGLBufferRenderer( _gl, extensions, info, capabilities );
				indexedBufferRenderer = new WebGLIndexedBufferRenderer( _gl, extensions, info, capabilities );

				info.programs = programCache.programs;

				_this.capabilities = capabilities;
				_this.extensions = extensions;
				_this.properties = properties;
				_this.renderLists = renderLists;
				_this.state = state;
				_this.info = info;

			}

			initGLContext();

			// xr

			var xr = new WebXRManager( _this, _gl );

			this.xr = xr;

			// shadow map

			var shadowMap = new WebGLShadowMap( _this, objects, capabilities.maxTextureSize );

			this.shadowMap = shadowMap;

			// API

			this.getContext = function () {

				return _gl;

			};

			this.getContextAttributes = function () {

				return _gl.getContextAttributes();

			};

			this.forceContextLoss = function () {

				var extension = extensions.get( 'WEBGL_lose_context' );
				if ( extension ) { extension.loseContext(); }

			};

			this.forceContextRestore = function () {

				var extension = extensions.get( 'WEBGL_lose_context' );
				if ( extension ) { extension.restoreContext(); }

			};

			this.getPixelRatio = function () {

				return _pixelRatio;

			};

			this.setPixelRatio = function ( value ) {

				if ( value === undefined ) { return; }

				_pixelRatio = value;

				this.setSize( _width, _height, false );

			};

			this.getSize = function ( target ) {

				if ( target === undefined ) {

					console.warn( 'WebGLRenderer: .getsize() now requires a Vector2 as an argument' );

					target = new Vector2();

				}

				return target.set( _width, _height );

			};

			this.setSize = function ( width, height, updateStyle ) {

				if ( xr.isPresenting ) {

					console.warn( 'THREE.WebGLRenderer: Can\'t change size while VR device is presenting.' );
					return;

				}

				_width = width;
				_height = height;

				_canvas.width = Math.floor( width * _pixelRatio );
				_canvas.height = Math.floor( height * _pixelRatio );

				if ( updateStyle !== false ) {

					_canvas.style.width = width + 'px';
					_canvas.style.height = height + 'px';

				}

				this.setViewport( 0, 0, width, height );

			};

			this.getDrawingBufferSize = function ( target ) {

				if ( target === undefined ) {

					console.warn( 'WebGLRenderer: .getdrawingBufferSize() now requires a Vector2 as an argument' );

					target = new Vector2();

				}

				return target.set( _width * _pixelRatio, _height * _pixelRatio ).floor();

			};

			this.setDrawingBufferSize = function ( width, height, pixelRatio ) {

				_width = width;
				_height = height;

				_pixelRatio = pixelRatio;

				_canvas.width = Math.floor( width * pixelRatio );
				_canvas.height = Math.floor( height * pixelRatio );

				this.setViewport( 0, 0, width, height );

			};

			this.getCurrentViewport = function ( target ) {

				if ( target === undefined ) {

					console.warn( 'WebGLRenderer: .getCurrentViewport() now requires a Vector4 as an argument' );

					target = new Vector4();

				}

				return target.copy( _currentViewport );

			};

			this.getViewport = function ( target ) {

				return target.copy( _viewport );

			};

			this.setViewport = function ( x, y, width, height ) {

				if ( x.isVector4 ) {

					_viewport.set( x.x, x.y, x.z, x.w );

				} else {

					_viewport.set( x, y, width, height );

				}

				state.viewport( _currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ).floor() );

			};

			this.getScissor = function ( target ) {

				return target.copy( _scissor );

			};

			this.setScissor = function ( x, y, width, height ) {

				if ( x.isVector4 ) {

					_scissor.set( x.x, x.y, x.z, x.w );

				} else {

					_scissor.set( x, y, width, height );

				}

				state.scissor( _currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ).floor() );

			};

			this.getScissorTest = function () {

				return _scissorTest;

			};

			this.setScissorTest = function ( boolean ) {

				state.setScissorTest( _scissorTest = boolean );

			};

			this.setOpaqueSort = function ( method ) {

				_opaqueSort = method;

			};

			this.setTransparentSort = function ( method ) {

				_transparentSort = method;

			};

			// Clearing

			this.getClearColor = function () {

				return background.getClearColor();

			};

			this.setClearColor = function () {

				background.setClearColor.apply( background, arguments );

			};

			this.getClearAlpha = function () {

				return background.getClearAlpha();

			};

			this.setClearAlpha = function () {

				background.setClearAlpha.apply( background, arguments );

			};

			this.clear = function ( color, depth, stencil ) {

				var bits = 0;

				if ( color === undefined || color ) { bits |= 16384; }
				if ( depth === undefined || depth ) { bits |= 256; }
				if ( stencil === undefined || stencil ) { bits |= 1024; }

				_gl.clear( bits );

			};

			this.clearColor = function () {

				this.clear( true, false, false );

			};

			this.clearDepth = function () {

				this.clear( false, true, false );

			};

			this.clearStencil = function () {

				this.clear( false, false, true );

			};

			//

			this.dispose = function () {

				_canvas.removeEventListener( 'webglcontextlost', onContextLost, false );
				_canvas.removeEventListener( 'webglcontextrestored', onContextRestore, false );

				renderLists.dispose();
				renderStates.dispose();
				properties.dispose();
				cubemaps.dispose();
				objects.dispose();
				bindingStates.dispose();

				xr.dispose();

				animation.stop();

			};

			// Events

			function onContextLost( event ) {

				event.preventDefault();

				console.log( 'THREE.WebGLRenderer: Context Lost.' );

				_isContextLost = true;

			}

			function onContextRestore( /* event */ ) {

				console.log( 'THREE.WebGLRenderer: Context Restored.' );

				_isContextLost = false;

				initGLContext();

			}

			function onMaterialDispose( event ) {

				var material = event.target;

				material.removeEventListener( 'dispose', onMaterialDispose );

				deallocateMaterial( material );

			}

			// Buffer deallocation

			function deallocateMaterial( material ) {

				releaseMaterialProgramReference( material );

				properties.remove( material );

			}


			function releaseMaterialProgramReference( material ) {

				var programInfo = properties.get( material ).program;

				if ( programInfo !== undefined ) {

					programCache.releaseProgram( programInfo );

				}

			}

			// Buffer rendering

			function renderObjectImmediate( object, program ) {

				object.render( function ( object ) {

					_this.renderBufferImmediate( object, program );

				} );

			}

			this.renderBufferImmediate = function ( object, program ) {

				bindingStates.initAttributes();

				var buffers = properties.get( object );

				if ( object.hasPositions && ! buffers.position ) { buffers.position = _gl.createBuffer(); }
				if ( object.hasNormals && ! buffers.normal ) { buffers.normal = _gl.createBuffer(); }
				if ( object.hasUvs && ! buffers.uv ) { buffers.uv = _gl.createBuffer(); }
				if ( object.hasColors && ! buffers.color ) { buffers.color = _gl.createBuffer(); }

				var programAttributes = program.getAttributes();

				if ( object.hasPositions ) {

					_gl.bindBuffer( 34962, buffers.position );
					_gl.bufferData( 34962, object.positionArray, 35048 );

					bindingStates.enableAttribute( programAttributes.position );
					_gl.vertexAttribPointer( programAttributes.position, 3, 5126, false, 0, 0 );

				}

				if ( object.hasNormals ) {

					_gl.bindBuffer( 34962, buffers.normal );
					_gl.bufferData( 34962, object.normalArray, 35048 );

					bindingStates.enableAttribute( programAttributes.normal );
					_gl.vertexAttribPointer( programAttributes.normal, 3, 5126, false, 0, 0 );

				}

				if ( object.hasUvs ) {

					_gl.bindBuffer( 34962, buffers.uv );
					_gl.bufferData( 34962, object.uvArray, 35048 );

					bindingStates.enableAttribute( programAttributes.uv );
					_gl.vertexAttribPointer( programAttributes.uv, 2, 5126, false, 0, 0 );

				}

				if ( object.hasColors ) {

					_gl.bindBuffer( 34962, buffers.color );
					_gl.bufferData( 34962, object.colorArray, 35048 );

					bindingStates.enableAttribute( programAttributes.color );
					_gl.vertexAttribPointer( programAttributes.color, 3, 5126, false, 0, 0 );

				}

				bindingStates.disableUnusedAttributes();

				_gl.drawArrays( 4, 0, object.count );

				object.count = 0;

			};

			this.renderBufferDirect = function ( camera, scene, geometry, material, object, group ) {

				if ( scene === null ) { scene = _emptyScene; } // renderBufferDirect second parameter used to be fog (could be null)

				var frontFaceCW = ( object.isMesh && object.matrixWorld.determinant() < 0 );

				var program = setProgram( camera, scene, material, object );

				state.setMaterial( material, frontFaceCW );

				//

				var index = geometry.index;
				var position = geometry.attributes.position;

				//

				if ( index === null ) {

					if ( position === undefined || position.count === 0 ) { return; }

				} else if ( index.count === 0 ) {

					return;

				}

				//

				var rangeFactor = 1;

				if ( material.wireframe === true ) {

					index = geometries.getWireframeAttribute( geometry );
					rangeFactor = 2;

				}

				if ( material.morphTargets || material.morphNormals ) {

					morphtargets.update( object, geometry, material, program );

				}

				bindingStates.setup( object, material, program, geometry, index );

				var attribute;
				var renderer = bufferRenderer;

				if ( index !== null ) {

					attribute = attributes.get( index );

					renderer = indexedBufferRenderer;
					renderer.setIndex( attribute );

				}

				//

				var dataCount = ( index !== null ) ? index.count : position.count;

				var rangeStart = geometry.drawRange.start * rangeFactor;
				var rangeCount = geometry.drawRange.count * rangeFactor;

				var groupStart = group !== null ? group.start * rangeFactor : 0;
				var groupCount = group !== null ? group.count * rangeFactor : Infinity;

				var drawStart = Math.max( rangeStart, groupStart );
				var drawEnd = Math.min( dataCount, rangeStart + rangeCount, groupStart + groupCount ) - 1;

				var drawCount = Math.max( 0, drawEnd - drawStart + 1 );

				if ( drawCount === 0 ) { return; }

				//

				if ( object.isMesh ) {

					if ( material.wireframe === true ) {

						state.setLineWidth( material.wireframeLinewidth * getTargetPixelRatio() );
						renderer.setMode( 1 );

					} else {

						renderer.setMode( 4 );

					}

				} else if ( object.isLine ) {

					var lineWidth = material.linewidth;

					if ( lineWidth === undefined ) { lineWidth = 1; } // Not using Line*Material

					state.setLineWidth( lineWidth * getTargetPixelRatio() );

					if ( object.isLineSegments ) {

						renderer.setMode( 1 );

					} else if ( object.isLineLoop ) {

						renderer.setMode( 2 );

					} else {

						renderer.setMode( 3 );

					}

				} else if ( object.isPoints ) {

					renderer.setMode( 0 );

				} else if ( object.isSprite ) {

					renderer.setMode( 4 );

				}

				if ( object.isInstancedMesh ) {

					renderer.renderInstances( drawStart, drawCount, object.count );

				} else if ( geometry.isInstancedBufferGeometry ) {

					var instanceCount = Math.min( geometry.instanceCount, geometry._maxInstanceCount );

					renderer.renderInstances( drawStart, drawCount, instanceCount );

				} else {

					renderer.render( drawStart, drawCount );

				}

			};

			// Compile

			this.compile = function ( scene, camera ) {

				currentRenderState = renderStates.get( scene, camera );
				currentRenderState.init();

				scene.traverse( function ( object ) {

					if ( object.isLight ) {

						currentRenderState.pushLight( object );

						if ( object.castShadow ) {

							currentRenderState.pushShadow( object );

						}

					}

				} );

				currentRenderState.setupLights( camera );

				var compiled = new WeakMap();

				scene.traverse( function ( object ) {

					var material = object.material;

					if ( material ) {

						if ( Array.isArray( material ) ) {

							for ( var i = 0; i < material.length; i ++ ) {

								var material2 = material[ i ];

								if ( compiled.has( material2 ) === false ) {

									initMaterial( material2, scene, object );
									compiled.set( material2 );

								}

							}

						} else if ( compiled.has( material ) === false ) {

							initMaterial( material, scene, object );
							compiled.set( material );

						}

					}

				} );

			};

			// Animation Loop

			var onAnimationFrameCallback = null;

			function onAnimationFrame( time ) {

				if ( xr.isPresenting ) { return; }
				if ( onAnimationFrameCallback ) { onAnimationFrameCallback( time ); }

			}

			var animation = new WebGLAnimation();
			animation.setAnimationLoop( onAnimationFrame );

			if ( typeof window !== 'undefined' ) { animation.setContext( window ); }

			this.setAnimationLoop = function ( callback ) {

				onAnimationFrameCallback = callback;
				xr.setAnimationLoop( callback );

				( callback === null ) ? animation.stop() : animation.start();

			};

			// Rendering

			this.render = function ( scene, camera ) {

				var renderTarget, forceClear;

				if ( arguments[ 2 ] !== undefined ) {

					console.warn( 'THREE.WebGLRenderer.render(): the renderTarget argument has been removed. Use .setRenderTarget() instead.' );
					renderTarget = arguments[ 2 ];

				}

				if ( arguments[ 3 ] !== undefined ) {

					console.warn( 'THREE.WebGLRenderer.render(): the forceClear argument has been removed. Use .clear() instead.' );
					forceClear = arguments[ 3 ];

				}

				if ( camera !== undefined && camera.isCamera !== true ) {

					console.error( 'THREE.WebGLRenderer.render: camera is not an instance of THREE.Camera.' );
					return;

				}

				if ( _isContextLost === true ) { return; }

				// reset caching for this frame

				bindingStates.resetDefaultState();
				_currentMaterialId = - 1;
				_currentCamera = null;

				// update scene graph

				if ( scene.autoUpdate === true ) { scene.updateMatrixWorld(); }

				// update camera matrices and frustum

				if ( camera.parent === null ) { camera.updateMatrixWorld(); }

				if ( xr.enabled === true && xr.isPresenting === true ) {

					camera = xr.getCamera( camera );

				}

				//
				if ( scene.isScene === true ) { scene.onBeforeRender( _this, scene, camera, renderTarget || _currentRenderTarget ); }

				currentRenderState = renderStates.get( scene, camera );
				currentRenderState.init();

				_projScreenMatrix.multiplyMatrices( camera.projectionMatrix, camera.matrixWorldInverse );
				_frustum.setFromProjectionMatrix( _projScreenMatrix );

				_localClippingEnabled = this.localClippingEnabled;
				_clippingEnabled = clipping.init( this.clippingPlanes, _localClippingEnabled, camera );

				currentRenderList = renderLists.get( scene, camera );
				currentRenderList.init();

				projectObject( scene, camera, 0, _this.sortObjects );

				currentRenderList.finish();

				if ( _this.sortObjects === true ) {

					currentRenderList.sort( _opaqueSort, _transparentSort );

				}

				//

				if ( _clippingEnabled === true ) { clipping.beginShadows(); }

				var shadowsArray = currentRenderState.state.shadowsArray;

				shadowMap.render( shadowsArray, scene, camera );

				currentRenderState.setupLights( camera );

				if ( _clippingEnabled === true ) { clipping.endShadows(); }

				//

				if ( this.info.autoReset === true ) { this.info.reset(); }

				if ( renderTarget !== undefined ) {

					this.setRenderTarget( renderTarget );

				}

				//

				background.render( currentRenderList, scene, camera, forceClear );

				// render scene

				var opaqueObjects = currentRenderList.opaque;
				var transparentObjects = currentRenderList.transparent;

				if ( opaqueObjects.length > 0 ) { renderObjects( opaqueObjects, scene, camera ); }
				if ( transparentObjects.length > 0 ) { renderObjects( transparentObjects, scene, camera ); }

				//

				if ( scene.isScene === true ) { scene.onAfterRender( _this, scene, camera ); }

				//

				if ( _currentRenderTarget !== null ) {

					// Generate mipmap if we're using any kind of mipmap filtering

					textures.updateRenderTargetMipmap( _currentRenderTarget );

					// resolve multisample renderbuffers to a single-sample texture if necessary

					textures.updateMultisampleRenderTarget( _currentRenderTarget );

				}

				// Ensure depth buffer writing is enabled so it can be cleared on next render

				state.buffers.depth.setTest( true );
				state.buffers.depth.setMask( true );
				state.buffers.color.setMask( true );

				state.setPolygonOffset( false );

				// _gl.finish();

				currentRenderList = null;
				currentRenderState = null;

			};

			function projectObject( object, camera, groupOrder, sortObjects ) {

				if ( object.visible === false ) { return; }

				var visible = object.layers.test( camera.layers );

				if ( visible ) {

					if ( object.isGroup ) {

						groupOrder = object.renderOrder;

					} else if ( object.isLOD ) {

						if ( object.autoUpdate === true ) { object.update( camera ); }

					} else if ( object.isLight ) {

						currentRenderState.pushLight( object );

						if ( object.castShadow ) {

							currentRenderState.pushShadow( object );

						}

					} else if ( object.isSprite ) {

						if ( ! object.frustumCulled || _frustum.intersectsSprite( object ) ) {

							if ( sortObjects ) {

								_vector3.setFromMatrixPosition( object.matrixWorld )
									.applyMatrix4( _projScreenMatrix );

							}

							var geometry = objects.update( object );
							var material = object.material;

							if ( material.visible ) {

								currentRenderList.push( object, geometry, material, groupOrder, _vector3.z, null );

							}

						}

					} else if ( object.isImmediateRenderObject ) {

						if ( sortObjects ) {

							_vector3.setFromMatrixPosition( object.matrixWorld )
								.applyMatrix4( _projScreenMatrix );

						}

						currentRenderList.push( object, null, object.material, groupOrder, _vector3.z, null );

					} else if ( object.isMesh || object.isLine || object.isPoints ) {

						if ( object.isSkinnedMesh ) {

							// update skeleton only once in a frame

							if ( object.skeleton.frame !== info.render.frame ) {

								object.skeleton.update();
								object.skeleton.frame = info.render.frame;

							}

						}

						if ( ! object.frustumCulled || _frustum.intersectsObject( object ) ) {

							if ( sortObjects ) {

								_vector3.setFromMatrixPosition( object.matrixWorld )
									.applyMatrix4( _projScreenMatrix );

							}

							var geometry$1 = objects.update( object );
							var material$1 = object.material;

							if ( Array.isArray( material$1 ) ) {

								var groups = geometry$1.groups;

								for ( var i = 0, l = groups.length; i < l; i ++ ) {

									var group = groups[ i ];
									var groupMaterial = material$1[ group.materialIndex ];

									if ( groupMaterial && groupMaterial.visible ) {

										currentRenderList.push( object, geometry$1, groupMaterial, groupOrder, _vector3.z, group );

									}

								}

							} else if ( material$1.visible ) {

								currentRenderList.push( object, geometry$1, material$1, groupOrder, _vector3.z, null );

							}

						}

					}

				}

				var children = object.children;

				for ( var i$1 = 0, l$1 = children.length; i$1 < l$1; i$1 ++ ) {

					projectObject( children[ i$1 ], camera, groupOrder, sortObjects );

				}

			}

			function renderObjects( renderList, scene, camera ) {

				var overrideMaterial = scene.isScene === true ? scene.overrideMaterial : null;

				for ( var i = 0, l = renderList.length; i < l; i ++ ) {

					var renderItem = renderList[ i ];

					var object = renderItem.object;
					var geometry = renderItem.geometry;
					var material = overrideMaterial === null ? renderItem.material : overrideMaterial;
					var group = renderItem.group;

					if ( camera.isArrayCamera ) {

						_currentArrayCamera = camera;

						var cameras = camera.cameras;

						for ( var j = 0, jl = cameras.length; j < jl; j ++ ) {

							var camera2 = cameras[ j ];

							if ( object.layers.test( camera2.layers ) ) {

								state.viewport( _currentViewport.copy( camera2.viewport ) );

								currentRenderState.setupLights( camera2 );

								renderObject( object, scene, camera2, geometry, material, group );

							}

						}

					} else {

						_currentArrayCamera = null;

						renderObject( object, scene, camera, geometry, material, group );

					}

				}

			}

			function renderObject( object, scene, camera, geometry, material, group ) {

				object.onBeforeRender( _this, scene, camera, geometry, material, group );
				currentRenderState = renderStates.get( scene, _currentArrayCamera || camera );

				object.modelViewMatrix.multiplyMatrices( camera.matrixWorldInverse, object.matrixWorld );
				object.normalMatrix.getNormalMatrix( object.modelViewMatrix );

				if ( object.isImmediateRenderObject ) {

					var program = setProgram( camera, scene, material, object );

					state.setMaterial( material );

					bindingStates.reset();

					renderObjectImmediate( object, program );

				} else {

					_this.renderBufferDirect( camera, scene, geometry, material, object, group );

				}

				object.onAfterRender( _this, scene, camera, geometry, material, group );
				currentRenderState = renderStates.get( scene, _currentArrayCamera || camera );

			}

			function initMaterial( material, scene, object ) {

				if ( scene.isScene !== true ) { scene = _emptyScene; } // scene could be a Mesh, Line, Points, ...

				var materialProperties = properties.get( material );

				var lights = currentRenderState.state.lights;
				var shadowsArray = currentRenderState.state.shadowsArray;

				var lightsStateVersion = lights.state.version;

				var parameters = programCache.getParameters( material, lights.state, shadowsArray, scene, object );
				var programCacheKey = programCache.getProgramCacheKey( parameters );

				var program = materialProperties.program;
				var programChange = true;

				if ( program === undefined ) {

					// new material
					material.addEventListener( 'dispose', onMaterialDispose );

				} else if ( program.cacheKey !== programCacheKey ) {

					// changed glsl or parameters
					releaseMaterialProgramReference( material );

				} else if ( materialProperties.lightsStateVersion !== lightsStateVersion ) {

					programChange = false;

				} else if ( parameters.shaderID !== undefined ) {

					// same glsl and uniform list, envMap still needs the update here to avoid a frame-late effect

					var environment = material.isMeshStandardMaterial ? scene.environment : null;
					materialProperties.envMap = cubemaps.get( material.envMap || environment );

					return;

				} else {

					// only rebuild uniform list
					programChange = false;

				}

				if ( programChange ) {

					parameters.uniforms = programCache.getUniforms( material );

					material.onBeforeCompile( parameters, _this );

					program = programCache.acquireProgram( parameters, programCacheKey );

					materialProperties.program = program;
					materialProperties.uniforms = parameters.uniforms;
					materialProperties.outputEncoding = parameters.outputEncoding;

				}

				var uniforms = materialProperties.uniforms;

				if ( ! material.isShaderMaterial &&
					! material.isRawShaderMaterial ||
					material.clipping === true ) {

					materialProperties.numClippingPlanes = clipping.numPlanes;
					materialProperties.numIntersection = clipping.numIntersection;
					uniforms.clippingPlanes = clipping.uniform;

				}

				materialProperties.environment = material.isMeshStandardMaterial ? scene.environment : null;
				materialProperties.fog = scene.fog;
				materialProperties.envMap = cubemaps.get( material.envMap || materialProperties.environment );

				// store the light setup it was created for

				materialProperties.needsLights = materialNeedsLights( material );
				materialProperties.lightsStateVersion = lightsStateVersion;

				if ( materialProperties.needsLights ) {

					// wire up the material to this renderer's lighting state

					uniforms.ambientLightColor.value = lights.state.ambient;
					uniforms.lightProbe.value = lights.state.probe;
					uniforms.directionalLights.value = lights.state.directional;
					uniforms.directionalLightShadows.value = lights.state.directionalShadow;
					uniforms.spotLights.value = lights.state.spot;
					uniforms.spotLightShadows.value = lights.state.spotShadow;
					uniforms.rectAreaLights.value = lights.state.rectArea;
					uniforms.ltc_1.value = lights.state.rectAreaLTC1;
					uniforms.ltc_2.value = lights.state.rectAreaLTC2;
					uniforms.pointLights.value = lights.state.point;
					uniforms.pointLightShadows.value = lights.state.pointShadow;
					uniforms.hemisphereLights.value = lights.state.hemi;

					uniforms.directionalShadowMap.value = lights.state.directionalShadowMap;
					uniforms.directionalShadowMatrix.value = lights.state.directionalShadowMatrix;
					uniforms.spotShadowMap.value = lights.state.spotShadowMap;
					uniforms.spotShadowMatrix.value = lights.state.spotShadowMatrix;
					uniforms.pointShadowMap.value = lights.state.pointShadowMap;
					uniforms.pointShadowMatrix.value = lights.state.pointShadowMatrix;
					// TODO (abelnation): add area lights shadow info to uniforms

				}

				var progUniforms = materialProperties.program.getUniforms();
				var uniformsList = WebGLUniforms.seqWithValue( progUniforms.seq, uniforms );

				materialProperties.uniformsList = uniformsList;

			}

			function setProgram( camera, scene, material, object ) {

				if ( scene.isScene !== true ) { scene = _emptyScene; } // scene could be a Mesh, Line, Points, ...

				textures.resetTextureUnits();

				var fog = scene.fog;
				var environment = material.isMeshStandardMaterial ? scene.environment : null;
				var encoding = ( _currentRenderTarget === null ) ? _this.outputEncoding : _currentRenderTarget.texture.encoding;
				var envMap = cubemaps.get( material.envMap || environment );

				var materialProperties = properties.get( material );
				var lights = currentRenderState.state.lights;

				if ( _clippingEnabled === true ) {

					if ( _localClippingEnabled === true || camera !== _currentCamera ) {

						var useCache =
							camera === _currentCamera &&
							material.id === _currentMaterialId;

						// we might want to call this function with some ClippingGroup
						// object instead of the material, once it becomes feasible
						// (#8465, #8379)
						clipping.setState( material, camera, useCache );

					}

				}

				if ( material.version === materialProperties.__version ) {

					if ( material.fog && materialProperties.fog !== fog ) {

						initMaterial( material, scene, object );

					} else if ( materialProperties.environment !== environment ) {

						initMaterial( material, scene, object );

					} else if ( materialProperties.needsLights && ( materialProperties.lightsStateVersion !== lights.state.version ) ) {

						initMaterial( material, scene, object );

					} else if ( materialProperties.numClippingPlanes !== undefined &&
						( materialProperties.numClippingPlanes !== clipping.numPlanes ||
						materialProperties.numIntersection !== clipping.numIntersection ) ) {

						initMaterial( material, scene, object );

					} else if ( materialProperties.outputEncoding !== encoding ) {

						initMaterial( material, scene, object );

					} else if ( materialProperties.envMap !== envMap ) {

						initMaterial( material, scene, object );

					}

				} else {

					initMaterial( material, scene, object );
					materialProperties.__version = material.version;

				}

				var refreshProgram = false;
				var refreshMaterial = false;
				var refreshLights = false;

				var program = materialProperties.program,
					p_uniforms = program.getUniforms(),
					m_uniforms = materialProperties.uniforms;

				if ( state.useProgram( program.program ) ) {

					refreshProgram = true;
					refreshMaterial = true;
					refreshLights = true;

				}

				if ( material.id !== _currentMaterialId ) {

					_currentMaterialId = material.id;

					refreshMaterial = true;

				}

				if ( refreshProgram || _currentCamera !== camera ) {

					p_uniforms.setValue( _gl, 'projectionMatrix', camera.projectionMatrix );

					if ( capabilities.logarithmicDepthBuffer ) {

						p_uniforms.setValue( _gl, 'logDepthBufFC',
							2.0 / ( Math.log( camera.far + 1.0 ) / Math.LN2 ) );

					}

					if ( _currentCamera !== camera ) {

						_currentCamera = camera;

						// lighting uniforms depend on the camera so enforce an update
						// now, in case this material supports lights - or later, when
						// the next material that does gets activated:

						refreshMaterial = true;		// set to true on material change
						refreshLights = true;		// remains set until update done

					}

					// load material specific uniforms
					// (shader material also gets them for the sake of genericity)

					if ( material.isShaderMaterial ||
						material.isMeshPhongMaterial ||
						material.isMeshToonMaterial ||
						material.isMeshStandardMaterial ||
						material.envMap ) {

						var uCamPos = p_uniforms.map.cameraPosition;

						if ( uCamPos !== undefined ) {

							uCamPos.setValue( _gl,
								_vector3.setFromMatrixPosition( camera.matrixWorld ) );

						}

					}

					if ( material.isMeshPhongMaterial ||
						material.isMeshToonMaterial ||
						material.isMeshLambertMaterial ||
						material.isMeshBasicMaterial ||
						material.isMeshStandardMaterial ||
						material.isShaderMaterial ) {

						p_uniforms.setValue( _gl, 'isOrthographic', camera.isOrthographicCamera === true );

					}

					if ( material.isMeshPhongMaterial ||
						material.isMeshToonMaterial ||
						material.isMeshLambertMaterial ||
						material.isMeshBasicMaterial ||
						material.isMeshStandardMaterial ||
						material.isShaderMaterial ||
						material.isShadowMaterial ||
						material.skinning ) {

						p_uniforms.setValue( _gl, 'viewMatrix', camera.matrixWorldInverse );

					}

				}

				// skinning uniforms must be set even if material didn't change
				// auto-setting of texture unit for bone texture must go before other textures
				// otherwise textures used for skinning can take over texture units reserved for other material textures

				if ( material.skinning ) {

					p_uniforms.setOptional( _gl, object, 'bindMatrix' );
					p_uniforms.setOptional( _gl, object, 'bindMatrixInverse' );

					var skeleton = object.skeleton;

					if ( skeleton ) {

						var bones = skeleton.bones;

						if ( capabilities.floatVertexTextures ) {

							if ( skeleton.boneTexture === undefined ) {

								// layout (1 matrix = 4 pixels)
								//      RGBA RGBA RGBA RGBA (=> column1, column2, column3, column4)
								//  with  8x8  pixel texture max   16 bones * 4 pixels =  (8 * 8)
								//       16x16 pixel texture max   64 bones * 4 pixels = (16 * 16)
								//       32x32 pixel texture max  256 bones * 4 pixels = (32 * 32)
								//       64x64 pixel texture max 1024 bones * 4 pixels = (64 * 64)


								var size = Math.sqrt( bones.length * 4 ); // 4 pixels needed for 1 matrix
								size = MathUtils.ceilPowerOfTwo( size );
								size = Math.max( size, 4 );

								var boneMatrices = new Float32Array( size * size * 4 ); // 4 floats per RGBA pixel
								boneMatrices.set( skeleton.boneMatrices ); // copy current values

								var boneTexture = new DataTexture( boneMatrices, size, size, RGBAFormat, FloatType );

								skeleton.boneMatrices = boneMatrices;
								skeleton.boneTexture = boneTexture;
								skeleton.boneTextureSize = size;

							}

							p_uniforms.setValue( _gl, 'boneTexture', skeleton.boneTexture, textures );
							p_uniforms.setValue( _gl, 'boneTextureSize', skeleton.boneTextureSize );

						} else {

							p_uniforms.setOptional( _gl, skeleton, 'boneMatrices' );

						}

					}

				}

				if ( refreshMaterial || materialProperties.receiveShadow !== object.receiveShadow ) {

					materialProperties.receiveShadow = object.receiveShadow;
					p_uniforms.setValue( _gl, 'receiveShadow', object.receiveShadow );

				}

				if ( refreshMaterial ) {

					p_uniforms.setValue( _gl, 'toneMappingExposure', _this.toneMappingExposure );

					if ( materialProperties.needsLights ) {

						// the current material requires lighting info

						// note: all lighting uniforms are always set correctly
						// they simply reference the renderer's state for their
						// values
						//
						// use the current material's .needsUpdate flags to set
						// the GL state when required

						markUniformsLightsNeedsUpdate( m_uniforms, refreshLights );

					}

					// refresh uniforms common to several materials

					if ( fog && material.fog ) {

						materials.refreshFogUniforms( m_uniforms, fog );

					}

					materials.refreshMaterialUniforms( m_uniforms, material, _pixelRatio, _height );

					WebGLUniforms.upload( _gl, materialProperties.uniformsList, m_uniforms, textures );

				}

				if ( material.isShaderMaterial && material.uniformsNeedUpdate === true ) {

					WebGLUniforms.upload( _gl, materialProperties.uniformsList, m_uniforms, textures );
					material.uniformsNeedUpdate = false;

				}

				if ( material.isSpriteMaterial ) {

					p_uniforms.setValue( _gl, 'center', object.center );

				}

				// common matrices

				p_uniforms.setValue( _gl, 'modelViewMatrix', object.modelViewMatrix );
				p_uniforms.setValue( _gl, 'normalMatrix', object.normalMatrix );
				p_uniforms.setValue( _gl, 'modelMatrix', object.matrixWorld );

				return program;

			}

			// If uniforms are marked as clean, they don't need to be loaded to the GPU.

			function markUniformsLightsNeedsUpdate( uniforms, value ) {

				uniforms.ambientLightColor.needsUpdate = value;
				uniforms.lightProbe.needsUpdate = value;

				uniforms.directionalLights.needsUpdate = value;
				uniforms.directionalLightShadows.needsUpdate = value;
				uniforms.pointLights.needsUpdate = value;
				uniforms.pointLightShadows.needsUpdate = value;
				uniforms.spotLights.needsUpdate = value;
				uniforms.spotLightShadows.needsUpdate = value;
				uniforms.rectAreaLights.needsUpdate = value;
				uniforms.hemisphereLights.needsUpdate = value;

			}

			function materialNeedsLights( material ) {

				return material.isMeshLambertMaterial || material.isMeshToonMaterial || material.isMeshPhongMaterial ||
					material.isMeshStandardMaterial || material.isShadowMaterial ||
					( material.isShaderMaterial && material.lights === true );

			}

			//
			this.setFramebuffer = function ( value ) {

				if ( _framebuffer !== value && _currentRenderTarget === null ) { _gl.bindFramebuffer( 36160, value ); }

				_framebuffer = value;

			};

			this.getActiveCubeFace = function () {

				return _currentActiveCubeFace;

			};

			this.getActiveMipmapLevel = function () {

				return _currentActiveMipmapLevel;

			};

			this.getRenderList = function () {

				return currentRenderList;

			};

			this.setRenderList = function ( renderList ) {

				currentRenderList = renderList;

			};

			this.getRenderState = function () {

				return currentRenderState;

			};

			this.setRenderState = function ( renderState ) {

				currentRenderState = renderState;

			};

			this.getRenderTarget = function () {

				return _currentRenderTarget;

			};

			this.setRenderTarget = function ( renderTarget, activeCubeFace, activeMipmapLevel ) {
				if ( activeCubeFace === void 0 ) activeCubeFace = 0;
				if ( activeMipmapLevel === void 0 ) activeMipmapLevel = 0;


				_currentRenderTarget = renderTarget;
				_currentActiveCubeFace = activeCubeFace;
				_currentActiveMipmapLevel = activeMipmapLevel;

				if ( renderTarget && properties.get( renderTarget ).__webglFramebuffer === undefined ) {

					textures.setupRenderTarget( renderTarget );

				}

				var framebuffer = _framebuffer;
				var isCube = false;

				if ( renderTarget ) {

					var _webglFramebuffer = properties.get( renderTarget ).__webglFramebuffer;

					if ( renderTarget.isWebGLCubeRenderTarget ) {

						framebuffer = _webglFramebuffer[ activeCubeFace ];
						isCube = true;

					} else if ( renderTarget.isWebGLMultisampleRenderTarget ) {

						framebuffer = properties.get( renderTarget ).__webglMultisampledFramebuffer;

					} else {

						framebuffer = _webglFramebuffer;

					}

					_currentViewport.copy( renderTarget.viewport );
					_currentScissor.copy( renderTarget.scissor );
					_currentScissorTest = renderTarget.scissorTest;

				} else {

					_currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ).floor();
					_currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ).floor();
					_currentScissorTest = _scissorTest;

				}

				if ( _currentFramebuffer !== framebuffer ) {

					_gl.bindFramebuffer( 36160, framebuffer );
					_currentFramebuffer = framebuffer;

				}

				state.viewport( _currentViewport );
				state.scissor( _currentScissor );
				state.setScissorTest( _currentScissorTest );

				if ( isCube ) {

					var textureProperties = properties.get( renderTarget.texture );
					_gl.framebufferTexture2D( 36160, 36064, 34069 + activeCubeFace, textureProperties.__webglTexture, activeMipmapLevel );

				}

			};

			this.readRenderTargetPixels = function ( renderTarget, x, y, width, height, buffer, activeCubeFaceIndex ) {

				if ( ! ( renderTarget && renderTarget.isWebGLRenderTarget ) ) {

					console.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not THREE.WebGLRenderTarget.' );
					return;

				}

				var framebuffer = properties.get( renderTarget ).__webglFramebuffer;

				if ( renderTarget.isWebGLCubeRenderTarget && activeCubeFaceIndex !== undefined ) {

					framebuffer = framebuffer[ activeCubeFaceIndex ];

				}

				if ( framebuffer ) {

					var restore = false;

					if ( framebuffer !== _currentFramebuffer ) {

						_gl.bindFramebuffer( 36160, framebuffer );

						restore = true;

					}

					try {

						var texture = renderTarget.texture;
						var textureFormat = texture.format;
						var textureType = texture.type;

						if ( textureFormat !== RGBAFormat && utils.convert( textureFormat ) !== _gl.getParameter( 35739 ) ) {

							console.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in RGBA or implementation defined format.' );
							return;

						}

						if ( textureType !== UnsignedByteType && utils.convert( textureType ) !== _gl.getParameter( 35738 ) && // IE11, Edge and Chrome Mac < 52 (#9513)
							! ( textureType === FloatType && ( capabilities.isWebGL2 || extensions.get( 'OES_texture_float' ) || extensions.get( 'WEBGL_color_buffer_float' ) ) ) && // Chrome Mac >= 52 and Firefox
							! ( textureType === HalfFloatType && ( capabilities.isWebGL2 ? extensions.get( 'EXT_color_buffer_float' ) : extensions.get( 'EXT_color_buffer_half_float' ) ) ) ) {

							console.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in UnsignedByteType or implementation defined type.' );
							return;

						}

						if ( _gl.checkFramebufferStatus( 36160 ) === 36053 ) {

							// the following if statement ensures valid read requests (no out-of-bounds pixels, see #8604)

							if ( ( x >= 0 && x <= ( renderTarget.width - width ) ) && ( y >= 0 && y <= ( renderTarget.height - height ) ) ) {

								_gl.readPixels( x, y, width, height, utils.convert( textureFormat ), utils.convert( textureType ), buffer );

							}

						} else {

							console.error( 'THREE.WebGLRenderer.readRenderTargetPixels: readPixels from renderTarget failed. Framebuffer not complete.' );

						}

					} finally {

						if ( restore ) {

							_gl.bindFramebuffer( 36160, _currentFramebuffer );

						}

					}

				}

			};

			this.copyFramebufferToTexture = function ( position, texture, level ) {

				if ( level === undefined ) { level = 0; }

				var levelScale = Math.pow( 2, - level );
				var width = Math.floor( texture.image.width * levelScale );
				var height = Math.floor( texture.image.height * levelScale );
				var glFormat = utils.convert( texture.format );

				textures.setTexture2D( texture, 0 );

				_gl.copyTexImage2D( 3553, level, glFormat, position.x, position.y, width, height, 0 );

				state.unbindTexture();

			};

			this.copyTextureToTexture = function ( position, srcTexture, dstTexture, level ) {

				if ( level === undefined ) { level = 0; }

				var width = srcTexture.image.width;
				var height = srcTexture.image.height;
				var glFormat = utils.convert( dstTexture.format );
				var glType = utils.convert( dstTexture.type );

				textures.setTexture2D( dstTexture, 0 );

				// As another texture upload may have changed pixelStorei
				// parameters, make sure they are correct for the dstTexture
				_gl.pixelStorei( 37440, dstTexture.flipY );
				_gl.pixelStorei( 37441, dstTexture.premultiplyAlpha );
				_gl.pixelStorei( 3317, dstTexture.unpackAlignment );

				if ( srcTexture.isDataTexture ) {

					_gl.texSubImage2D( 3553, level, position.x, position.y, width, height, glFormat, glType, srcTexture.image.data );

				} else {

					if ( srcTexture.isCompressedTexture ) {

						_gl.compressedTexSubImage2D( 3553, level, position.x, position.y, srcTexture.mipmaps[ 0 ].width, srcTexture.mipmaps[ 0 ].height, glFormat, srcTexture.mipmaps[ 0 ].data );

					} else {

						_gl.texSubImage2D( 3553, level, position.x, position.y, glFormat, glType, srcTexture.image );

					}

				}

				// Generate mipmaps only when copying level 0
				if ( level === 0 && dstTexture.generateMipmaps ) { _gl.generateMipmap( 3553 ); }

				state.unbindTexture();

			};

			this.initTexture = function ( texture ) {

				textures.setTexture2D( texture, 0 );

				state.unbindTexture();

			};

			if ( typeof __THREE_DEVTOOLS__ !== 'undefined' ) {

				__THREE_DEVTOOLS__.dispatchEvent( new CustomEvent( 'observe', { detail: this } ) ); // eslint-disable-line no-undef

			}

		}

		function WebGL1Renderer( parameters ) {

			WebGLRenderer.call( this, parameters );

		}

		WebGL1Renderer.prototype = Object.assign( Object.create( WebGLRenderer.prototype ), {

			constructor: WebGL1Renderer,

			isWebGL1Renderer: true

		} );

		var FogExp2 = function FogExp2( color, density ) {

			Object.defineProperty( this, 'isFogExp2', { value: true } );

			this.name = '';

			this.color = new Color( color );
			this.density = ( density !== undefined ) ? density : 0.00025;

		};

		FogExp2.prototype.clone = function clone () {

			return new FogExp2( this.color, this.density );

		};

		FogExp2.prototype.toJSON = function toJSON ( /* meta */ ) {

			return {
				type: 'FogExp2',
				color: this.color.getHex(),
				density: this.density
			};

		};

		var Fog = function Fog( color, near, far ) {

			Object.defineProperty( this, 'isFog', { value: true } );

			this.name = '';

			this.color = new Color( color );

			this.near = ( near !== undefined ) ? near : 1;
			this.far = ( far !== undefined ) ? far : 1000;

		};

		Fog.prototype.clone = function clone () {

			return new Fog( this.color, this.near, this.far );

		};

		Fog.prototype.toJSON = function toJSON ( /* meta */ ) {

			return {
				type: 'Fog',
				color: this.color.getHex(),
				near: this.near,
				far: this.far
			};

		};

		function Scene() {

				Object3D.call(this);

				Object.defineProperty( this, 'isScene', { value: true } );

				this.type = 'Scene';

				this.background = null;
				this.environment = null;
				this.fog = null;

				this.overrideMaterial = null;

				this.autoUpdate = true; // checked by the renderer

				if ( typeof __THREE_DEVTOOLS__ !== 'undefined' ) {

					__THREE_DEVTOOLS__.dispatchEvent( new CustomEvent( 'observe', { detail: this } ) ); // eslint-disable-line no-undef

				}

			}

			Scene.prototype = Object.create( Object3D.prototype );
			Scene.prototype.constructor = Scene;

			Scene.prototype.copy = function copy ( source, recursive ) {

				Object3D.prototype.copy.call( this, source, recursive );

				if ( source.background !== null ) { this.background = source.background.clone(); }
				if ( source.environment !== null ) { this.environment = source.environment.clone(); }
				if ( source.fog !== null ) { this.fog = source.fog.clone(); }

				if ( source.overrideMaterial !== null ) { this.overrideMaterial = source.overrideMaterial.clone(); }

				this.autoUpdate = source.autoUpdate;
				this.matrixAutoUpdate = source.matrixAutoUpdate;

				return this;

			};

			Scene.prototype.toJSON = function toJSON ( meta ) {

				var data = Object3D.prototype.toJSON.call( this, meta );

				if ( this.background !== null ) { data.object.background = this.background.toJSON( meta ); }
				if ( this.environment !== null ) { data.object.environment = this.environment.toJSON( meta ); }
				if ( this.fog !== null ) { data.object.fog = this.fog.toJSON(); }

				return data;

			};

		function InterleavedBuffer( array, stride ) {

			this.array = array;
			this.stride = stride;
			this.count = array !== undefined ? array.length / stride : 0;

			this.usage = StaticDrawUsage;
			this.updateRange = { offset: 0, count: - 1 };

			this.version = 0;

			this.uuid = MathUtils.generateUUID();

		}

		Object.defineProperty( InterleavedBuffer.prototype, 'needsUpdate', {

			set: function ( value ) {

				if ( value === true ) { this.version ++; }

			}

		} );

		Object.assign( InterleavedBuffer.prototype, {

			isInterleavedBuffer: true,

			onUploadCallback: function () {},

			setUsage: function ( value ) {

				this.usage = value;

				return this;

			},

			copy: function ( source ) {

				this.array = new source.array.constructor( source.array );
				this.count = source.count;
				this.stride = source.stride;
				this.usage = source.usage;

				return this;

			},

			copyAt: function ( index1, attribute, index2 ) {

				index1 *= this.stride;
				index2 *= attribute.stride;

				for ( var i = 0, l = this.stride; i < l; i ++ ) {

					this.array[ index1 + i ] = attribute.array[ index2 + i ];

				}

				return this;

			},

			set: function ( value, offset ) {

				if ( offset === undefined ) { offset = 0; }

				this.array.set( value, offset );

				return this;

			},

			clone: function ( data ) {

				if ( data.arrayBuffers === undefined ) {

					data.arrayBuffers = {};

				}

				if ( this.array.buffer._uuid === undefined ) {

					this.array.buffer._uuid = MathUtils.generateUUID();

				}

				if ( data.arrayBuffers[ this.array.buffer._uuid ] === undefined ) {

					data.arrayBuffers[ this.array.buffer._uuid ] = this.array.slice( 0 ).buffer;

				}

				var array = new this.array.constructor( data.arrayBuffers[ this.array.buffer._uuid ] );

				var ib = new InterleavedBuffer( array, this.stride );
				ib.setUsage( this.usage );

				return ib;

			},

			onUpload: function ( callback ) {

				this.onUploadCallback = callback;

				return this;

			},

			toJSON: function ( data ) {

				if ( data.arrayBuffers === undefined ) {

					data.arrayBuffers = {};

				}

				// generate UUID for array buffer if necessary

				if ( this.array.buffer._uuid === undefined ) {

					this.array.buffer._uuid = MathUtils.generateUUID();

				}

				if ( data.arrayBuffers[ this.array.buffer._uuid ] === undefined ) {

					data.arrayBuffers[ this.array.buffer._uuid ] = Array.prototype.slice.call( new Uint32Array( this.array.buffer ) );

				}

				//

				return {
					uuid: this.uuid,
					buffer: this.array.buffer._uuid,
					type: this.array.constructor.name,
					stride: this.stride
				};

			}

		} );

		var _vector$6 = new Vector3();

		function InterleavedBufferAttribute( interleavedBuffer, itemSize, offset, normalized ) {

			this.name = '';

			this.data = interleavedBuffer;
			this.itemSize = itemSize;
			this.offset = offset;

			this.normalized = normalized === true;

		}

		Object.defineProperties( InterleavedBufferAttribute.prototype, {

			count: {

				get: function () {

					return this.data.count;

				}

			},

			array: {

				get: function () {

					return this.data.array;

				}

			},

			needsUpdate: {

				set: function ( value ) {

					this.data.needsUpdate = value;

				}

			}

		} );

		Object.assign( InterleavedBufferAttribute.prototype, {

			isInterleavedBufferAttribute: true,

			applyMatrix4: function ( m ) {

				for ( var i = 0, l = this.data.count; i < l; i ++ ) {

					_vector$6.x = this.getX( i );
					_vector$6.y = this.getY( i );
					_vector$6.z = this.getZ( i );

					_vector$6.applyMatrix4( m );

					this.setXYZ( i, _vector$6.x, _vector$6.y, _vector$6.z );

				}

				return this;

			},

			setX: function ( index, x ) {

				this.data.array[ index * this.data.stride + this.offset ] = x;

				return this;

			},

			setY: function ( index, y ) {

				this.data.array[ index * this.data.stride + this.offset + 1 ] = y;

				return this;

			},

			setZ: function ( index, z ) {

				this.data.array[ index * this.data.stride + this.offset + 2 ] = z;

				return this;

			},

			setW: function ( index, w ) {

				this.data.array[ index * this.data.stride + this.offset + 3 ] = w;

				return this;

			},

			getX: function ( index ) {

				return this.data.array[ index * this.data.stride + this.offset ];

			},

			getY: function ( index ) {

				return this.data.array[ index * this.data.stride + this.offset + 1 ];

			},

			getZ: function ( index ) {

				return this.data.array[ index * this.data.stride + this.offset + 2 ];

			},

			getW: function ( index ) {

				return this.data.array[ index * this.data.stride + this.offset + 3 ];

			},

			setXY: function ( index, x, y ) {

				index = index * this.data.stride + this.offset;

				this.data.array[ index + 0 ] = x;
				this.data.array[ index + 1 ] = y;

				return this;

			},

			setXYZ: function ( index, x, y, z ) {

				index = index * this.data.stride + this.offset;

				this.data.array[ index + 0 ] = x;
				this.data.array[ index + 1 ] = y;
				this.data.array[ index + 2 ] = z;

				return this;

			},

			setXYZW: function ( index, x, y, z, w ) {

				index = index * this.data.stride + this.offset;

				this.data.array[ index + 0 ] = x;
				this.data.array[ index + 1 ] = y;
				this.data.array[ index + 2 ] = z;
				this.data.array[ index + 3 ] = w;

				return this;

			},

			clone: function ( data ) {

				if ( data === undefined ) {

					console.log( 'THREE.InterleavedBufferAttribute.clone(): Cloning an interlaved buffer attribute will deinterleave buffer data.' );

					var array = [];

					for ( var i = 0; i < this.count; i ++ ) {

						var index = i * this.data.stride + this.offset;

						for ( var j = 0; j < this.itemSize; j ++ ) {

							array.push( this.data.array[ index + j ] );

						}

					}

					return new BufferAttribute( new this.array.constructor( array ), this.itemSize, this.normalized );

				} else {

					if ( data.interleavedBuffers === undefined ) {

						data.interleavedBuffers = {};

					}

					if ( data.interleavedBuffers[ this.data.uuid ] === undefined ) {

						data.interleavedBuffers[ this.data.uuid ] = this.data.clone( data );

					}

					return new InterleavedBufferAttribute( data.interleavedBuffers[ this.data.uuid ], this.itemSize, this.offset, this.normalized );

				}

			},

			toJSON: function ( data ) {

				if ( data === undefined ) {

					console.log( 'THREE.InterleavedBufferAttribute.toJSON(): Serializing an interlaved buffer attribute will deinterleave buffer data.' );

					var array = [];

					for ( var i = 0; i < this.count; i ++ ) {

						var index = i * this.data.stride + this.offset;

						for ( var j = 0; j < this.itemSize; j ++ ) {

							array.push( this.data.array[ index + j ] );

						}

					}

					// deinterleave data and save it as an ordinary buffer attribute for now

					return {
						itemSize: this.itemSize,
						type: this.array.constructor.name,
						array: array,
						normalized: this.normalized
					};

				} else {

					// save as true interlaved attribtue

					if ( data.interleavedBuffers === undefined ) {

						data.interleavedBuffers = {};

					}

					if ( data.interleavedBuffers[ this.data.uuid ] === undefined ) {

						data.interleavedBuffers[ this.data.uuid ] = this.data.toJSON( data );

					}

					return {
						isInterleavedBufferAttribute: true,
						itemSize: this.itemSize,
						data: this.data.uuid,
						offset: this.offset,
						normalized: this.normalized
					};

				}

			}

		} );

		/**
		 * parameters = {
		 *  color: <hex>,
		 *  map: new THREE.Texture( <Image> ),
		 *  alphaMap: new THREE.Texture( <Image> ),
		 *  rotation: <float>,
		 *  sizeAttenuation: <bool>
		 * }
		 */

		function SpriteMaterial( parameters ) {

			Material.call( this );

			this.type = 'SpriteMaterial';

			this.color = new Color( 0xffffff );

			this.map = null;

			this.alphaMap = null;

			this.rotation = 0;

			this.sizeAttenuation = true;

			this.transparent = true;

			this.setValues( parameters );

		}

		SpriteMaterial.prototype = Object.create( Material.prototype );
		SpriteMaterial.prototype.constructor = SpriteMaterial;
		SpriteMaterial.prototype.isSpriteMaterial = true;

		SpriteMaterial.prototype.copy = function ( source ) {

			Material.prototype.copy.call( this, source );

			this.color.copy( source.color );

			this.map = source.map;

			this.alphaMap = source.alphaMap;

			this.rotation = source.rotation;

			this.sizeAttenuation = source.sizeAttenuation;

			return this;

		};

		var _geometry;

		var _intersectPoint = new Vector3();
		var _worldScale = new Vector3();
		var _mvPosition = new Vector3();

		var _alignedPosition = new Vector2();
		var _rotatedPosition = new Vector2();
		var _viewWorldMatrix = new Matrix4();

		var _vA$1 = new Vector3();
		var _vB$1 = new Vector3();
		var _vC$1 = new Vector3();

		var _uvA$1 = new Vector2();
		var _uvB$1 = new Vector2();
		var _uvC$1 = new Vector2();

		function Sprite( material ) {

			Object3D.call( this );

			this.type = 'Sprite';

			if ( _geometry === undefined ) {

				_geometry = new BufferGeometry();

				var float32Array = new Float32Array( [
					- 0.5, - 0.5, 0, 0, 0,
					0.5, - 0.5, 0, 1, 0,
					0.5, 0.5, 0, 1, 1,
					- 0.5, 0.5, 0, 0, 1
				] );

				var interleavedBuffer = new InterleavedBuffer( float32Array, 5 );

				_geometry.setIndex( [ 0, 1, 2,	0, 2, 3 ] );
				_geometry.setAttribute( 'position', new InterleavedBufferAttribute( interleavedBuffer, 3, 0, false ) );
				_geometry.setAttribute( 'uv', new InterleavedBufferAttribute( interleavedBuffer, 2, 3, false ) );

			}

			this.geometry = _geometry;
			this.material = ( material !== undefined ) ? material : new SpriteMaterial();

			this.center = new Vector2( 0.5, 0.5 );

		}

		Sprite.prototype = Object.assign( Object.create( Object3D.prototype ), {

			constructor: Sprite,

			isSprite: true,

			raycast: function ( raycaster, intersects ) {

				if ( raycaster.camera === null ) {

					console.error( 'THREE.Sprite: "Raycaster.camera" needs to be set in order to raycast against sprites.' );

				}

				_worldScale.setFromMatrixScale( this.matrixWorld );

				_viewWorldMatrix.copy( raycaster.camera.matrixWorld );
				this.modelViewMatrix.multiplyMatrices( raycaster.camera.matrixWorldInverse, this.matrixWorld );

				_mvPosition.setFromMatrixPosition( this.modelViewMatrix );

				if ( raycaster.camera.isPerspectiveCamera && this.material.sizeAttenuation === false ) {

					_worldScale.multiplyScalar( - _mvPosition.z );

				}

				var rotation = this.material.rotation;
				var sin, cos;

				if ( rotation !== 0 ) {

					cos = Math.cos( rotation );
					sin = Math.sin( rotation );

				}

				var center = this.center;

				transformVertex( _vA$1.set( - 0.5, - 0.5, 0 ), _mvPosition, center, _worldScale, sin, cos );
				transformVertex( _vB$1.set( 0.5, - 0.5, 0 ), _mvPosition, center, _worldScale, sin, cos );
				transformVertex( _vC$1.set( 0.5, 0.5, 0 ), _mvPosition, center, _worldScale, sin, cos );

				_uvA$1.set( 0, 0 );
				_uvB$1.set( 1, 0 );
				_uvC$1.set( 1, 1 );

				// check first triangle
				var intersect = raycaster.ray.intersectTriangle( _vA$1, _vB$1, _vC$1, false, _intersectPoint );

				if ( intersect === null ) {

					// check second triangle
					transformVertex( _vB$1.set( - 0.5, 0.5, 0 ), _mvPosition, center, _worldScale, sin, cos );
					_uvB$1.set( 0, 1 );

					intersect = raycaster.ray.intersectTriangle( _vA$1, _vC$1, _vB$1, false, _intersectPoint );
					if ( intersect === null ) {

						return;

					}

				}

				var distance = raycaster.ray.origin.distanceTo( _intersectPoint );

				if ( distance < raycaster.near || distance > raycaster.far ) { return; }

				intersects.push( {

					distance: distance,
					point: _intersectPoint.clone(),
					uv: Triangle.getUV( _intersectPoint, _vA$1, _vB$1, _vC$1, _uvA$1, _uvB$1, _uvC$1, new Vector2() ),
					face: null,
					object: this

				} );

			},

			copy: function ( source ) {

				Object3D.prototype.copy.call( this, source );

				if ( source.center !== undefined ) { this.center.copy( source.center ); }

				this.material = source.material;

				return this;

			}

		} );

		function transformVertex( vertexPosition, mvPosition, center, scale, sin, cos ) {

			// compute position in camera space
			_alignedPosition.subVectors( vertexPosition, center ).addScalar( 0.5 ).multiply( scale );

			// to check if rotation is not zero
			if ( sin !== undefined ) {

				_rotatedPosition.x = ( cos * _alignedPosition.x ) - ( sin * _alignedPosition.y );
				_rotatedPosition.y = ( sin * _alignedPosition.x ) + ( cos * _alignedPosition.y );

			} else {

				_rotatedPosition.copy( _alignedPosition );

			}


			vertexPosition.copy( mvPosition );
			vertexPosition.x += _rotatedPosition.x;
			vertexPosition.y += _rotatedPosition.y;

			// transform to world space
			vertexPosition.applyMatrix4( _viewWorldMatrix );

		}

		var _v1$4 = new Vector3();
		var _v2$2 = new Vector3();

		function LOD() {

			Object3D.call( this );

			this._currentLevel = 0;

			this.type = 'LOD';

			Object.defineProperties( this, {
				levels: {
					enumerable: true,
					value: []
				}
			} );

			this.autoUpdate = true;

		}

		LOD.prototype = Object.assign( Object.create( Object3D.prototype ), {

			constructor: LOD,

			isLOD: true,

			copy: function ( source ) {

				Object3D.prototype.copy.call( this, source, false );

				var levels = source.levels;

				for ( var i = 0, l = levels.length; i < l; i ++ ) {

					var level = levels[ i ];

					this.addLevel( level.object.clone(), level.distance );

				}

				this.autoUpdate = source.autoUpdate;

				return this;

			},

			addLevel: function ( object, distance ) {

				if ( distance === undefined ) { distance = 0; }

				distance = Math.abs( distance );

				var levels = this.levels;

				var l;

				for ( l = 0; l < levels.length; l ++ ) {

					if ( distance < levels[ l ].distance ) {

						break;

					}

				}

				levels.splice( l, 0, { distance: distance, object: object } );

				this.add( object );

				return this;

			},

			getCurrentLevel: function () {

				return this._currentLevel;

			},

			getObjectForDistance: function ( distance ) {

				var levels = this.levels;

				if ( levels.length > 0 ) {

					var i, l;

					for ( i = 1, l = levels.length; i < l; i ++ ) {

						if ( distance < levels[ i ].distance ) {

							break;

						}

					}

					return levels[ i - 1 ].object;

				}

				return null;

			},

			raycast: function ( raycaster, intersects ) {

				var levels = this.levels;

				if ( levels.length > 0 ) {

					_v1$4.setFromMatrixPosition( this.matrixWorld );

					var distance = raycaster.ray.origin.distanceTo( _v1$4 );

					this.getObjectForDistance( distance ).raycast( raycaster, intersects );

				}

			},

			update: function ( camera ) {

				var levels = this.levels;

				if ( levels.length > 1 ) {

					_v1$4.setFromMatrixPosition( camera.matrixWorld );
					_v2$2.setFromMatrixPosition( this.matrixWorld );

					var distance = _v1$4.distanceTo( _v2$2 ) / camera.zoom;

					levels[ 0 ].object.visible = true;

					var i, l;

					for ( i = 1, l = levels.length; i < l; i ++ ) {

						if ( distance >= levels[ i ].distance ) {

							levels[ i - 1 ].object.visible = false;
							levels[ i ].object.visible = true;

						} else {

							break;

						}

					}

					this._currentLevel = i - 1;

					for ( ; i < l; i ++ ) {

						levels[ i ].object.visible = false;

					}

				}

			},

			toJSON: function ( meta ) {

				var data = Object3D.prototype.toJSON.call( this, meta );

				if ( this.autoUpdate === false ) { data.object.autoUpdate = false; }

				data.object.levels = [];

				var levels = this.levels;

				for ( var i = 0, l = levels.length; i < l; i ++ ) {

					var level = levels[ i ];

					data.object.levels.push( {
						object: level.object.uuid,
						distance: level.distance
					} );

				}

				return data;

			}

		} );

		function SkinnedMesh( geometry, material ) {

			if ( geometry && geometry.isGeometry ) {

				console.error( 'THREE.SkinnedMesh no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.' );

			}

			Mesh.call( this, geometry, material );

			this.type = 'SkinnedMesh';

			this.bindMode = 'attached';
			this.bindMatrix = new Matrix4();
			this.bindMatrixInverse = new Matrix4();

		}

		SkinnedMesh.prototype = Object.assign( Object.create( Mesh.prototype ), {

			constructor: SkinnedMesh,

			isSkinnedMesh: true,

			copy: function ( source ) {

				Mesh.prototype.copy.call( this, source );

				this.bindMode = source.bindMode;
				this.bindMatrix.copy( source.bindMatrix );
				this.bindMatrixInverse.copy( source.bindMatrixInverse );

				this.skeleton = source.skeleton;

				return this;

			},

			bind: function ( skeleton, bindMatrix ) {

				this.skeleton = skeleton;

				if ( bindMatrix === undefined ) {

					this.updateMatrixWorld( true );

					this.skeleton.calculateInverses();

					bindMatrix = this.matrixWorld;

				}

				this.bindMatrix.copy( bindMatrix );
				this.bindMatrixInverse.getInverse( bindMatrix );

			},

			pose: function () {

				this.skeleton.pose();

			},

			normalizeSkinWeights: function () {

				var vector = new Vector4();

				var skinWeight = this.geometry.attributes.skinWeight;

				for ( var i = 0, l = skinWeight.count; i < l; i ++ ) {

					vector.x = skinWeight.getX( i );
					vector.y = skinWeight.getY( i );
					vector.z = skinWeight.getZ( i );
					vector.w = skinWeight.getW( i );

					var scale = 1.0 / vector.manhattanLength();

					if ( scale !== Infinity ) {

						vector.multiplyScalar( scale );

					} else {

						vector.set( 1, 0, 0, 0 ); // do something reasonable

					}

					skinWeight.setXYZW( i, vector.x, vector.y, vector.z, vector.w );

				}

			},

			updateMatrixWorld: function ( force ) {

				Mesh.prototype.updateMatrixWorld.call( this, force );

				if ( this.bindMode === 'attached' ) {

					this.bindMatrixInverse.getInverse( this.matrixWorld );

				} else if ( this.bindMode === 'detached' ) {

					this.bindMatrixInverse.getInverse( this.bindMatrix );

				} else {

					console.warn( 'THREE.SkinnedMesh: Unrecognized bindMode: ' + this.bindMode );

				}

			},

			boneTransform: ( function () {

				var basePosition = new Vector3();

				var skinIndex = new Vector4();
				var skinWeight = new Vector4();

				var vector = new Vector3();
				var matrix = new Matrix4();

				return function ( index, target ) {

					var skeleton = this.skeleton;
					var geometry = this.geometry;

					skinIndex.fromBufferAttribute( geometry.attributes.skinIndex, index );
					skinWeight.fromBufferAttribute( geometry.attributes.skinWeight, index );

					basePosition.fromBufferAttribute( geometry.attributes.position, index ).applyMatrix4( this.bindMatrix );

					target.set( 0, 0, 0 );

					for ( var i = 0; i < 4; i ++ ) {

						var weight = skinWeight.getComponent( i );

						if ( weight !== 0 ) {

							var boneIndex = skinIndex.getComponent( i );

							matrix.multiplyMatrices( skeleton.bones[ boneIndex ].matrixWorld, skeleton.boneInverses[ boneIndex ] );

							target.addScaledVector( vector.copy( basePosition ).applyMatrix4( matrix ), weight );

						}

					}

					return target.applyMatrix4( this.bindMatrixInverse );

				};

			}() )

		} );

		var _offsetMatrix = new Matrix4();
		var _identityMatrix = new Matrix4();

		function Skeleton( bones, boneInverses ) {

			// copy the bone array

			bones = bones || [];

			this.bones = bones.slice( 0 );
			this.boneMatrices = new Float32Array( this.bones.length * 16 );

			this.frame = - 1;

			// use the supplied bone inverses or calculate the inverses

			if ( boneInverses === undefined ) {

				this.calculateInverses();

			} else {

				if ( this.bones.length === boneInverses.length ) {

					this.boneInverses = boneInverses.slice( 0 );

				} else {

					console.warn( 'THREE.Skeleton boneInverses is the wrong length.' );

					this.boneInverses = [];

					for ( var i = 0, il = this.bones.length; i < il; i ++ ) {

						this.boneInverses.push( new Matrix4() );

					}

				}

			}

		}

		Object.assign( Skeleton.prototype, {

			calculateInverses: function () {

				this.boneInverses = [];

				for ( var i = 0, il = this.bones.length; i < il; i ++ ) {

					var inverse = new Matrix4();

					if ( this.bones[ i ] ) {

						inverse.getInverse( this.bones[ i ].matrixWorld );

					}

					this.boneInverses.push( inverse );

				}

			},

			pose: function () {

				// recover the bind-time world matrices

				for ( var i = 0, il = this.bones.length; i < il; i ++ ) {

					var bone = this.bones[ i ];

					if ( bone ) {

						bone.matrixWorld.getInverse( this.boneInverses[ i ] );

					}

				}

				// compute the local matrices, positions, rotations and scales

				for ( var i$1 = 0, il$1 = this.bones.length; i$1 < il$1; i$1 ++ ) {

					var bone$1 = this.bones[ i$1 ];

					if ( bone$1 ) {

						if ( bone$1.parent && bone$1.parent.isBone ) {

							bone$1.matrix.getInverse( bone$1.parent.matrixWorld );
							bone$1.matrix.multiply( bone$1.matrixWorld );

						} else {

							bone$1.matrix.copy( bone$1.matrixWorld );

						}

						bone$1.matrix.decompose( bone$1.position, bone$1.quaternion, bone$1.scale );

					}

				}

			},

			update: function () {

				var bones = this.bones;
				var boneInverses = this.boneInverses;
				var boneMatrices = this.boneMatrices;
				var boneTexture = this.boneTexture;

				// flatten bone matrices to array

				for ( var i = 0, il = bones.length; i < il; i ++ ) {

					// compute the offset between the current and the original transform

					var matrix = bones[ i ] ? bones[ i ].matrixWorld : _identityMatrix;

					_offsetMatrix.multiplyMatrices( matrix, boneInverses[ i ] );
					_offsetMatrix.toArray( boneMatrices, i * 16 );

				}

				if ( boneTexture !== undefined ) {

					boneTexture.needsUpdate = true;

				}

			},

			clone: function () {

				return new Skeleton( this.bones, this.boneInverses );

			},

			getBoneByName: function ( name ) {

				for ( var i = 0, il = this.bones.length; i < il; i ++ ) {

					var bone = this.bones[ i ];

					if ( bone.name === name ) {

						return bone;

					}

				}

				return undefined;

			},

			dispose: function ( ) {

				if ( this.boneTexture ) {

					this.boneTexture.dispose();

					this.boneTexture = undefined;

				}

			}

		} );

		function Bone() {

			Object3D.call( this );

			this.type = 'Bone';

		}

		Bone.prototype = Object.assign( Object.create( Object3D.prototype ), {

			constructor: Bone,

			isBone: true

		} );

		var _instanceLocalMatrix = new Matrix4();
		var _instanceWorldMatrix = new Matrix4();

		var _instanceIntersects = [];

		var _mesh = new Mesh();

		function InstancedMesh( geometry, material, count ) {

			Mesh.call( this, geometry, material );

			this.instanceMatrix = new BufferAttribute( new Float32Array( count * 16 ), 16 );
			this.instanceColor = null;

			this.count = count;

			this.frustumCulled = false;

		}

		InstancedMesh.prototype = Object.assign( Object.create( Mesh.prototype ), {

			constructor: InstancedMesh,

			isInstancedMesh: true,

			copy: function ( source ) {

				Mesh.prototype.copy.call( this, source );

				this.instanceMatrix.copy( source.instanceMatrix );
				this.count = source.count;

				return this;

			},

			setColorAt: function ( index, color ) {

				if ( this.instanceColor === null ) {

					this.instanceColor = new BufferAttribute( new Float32Array( this.count * 3 ), 3 );

				}

				color.toArray( this.instanceColor.array, index * 3 );

			},

			getMatrixAt: function ( index, matrix ) {

				matrix.fromArray( this.instanceMatrix.array, index * 16 );

			},

			raycast: function ( raycaster, intersects ) {

				var matrixWorld = this.matrixWorld;
				var raycastTimes = this.count;

				_mesh.geometry = this.geometry;
				_mesh.material = this.material;

				if ( _mesh.material === undefined ) { return; }

				for ( var instanceId = 0; instanceId < raycastTimes; instanceId ++ ) {

					// calculate the world matrix for each instance

					this.getMatrixAt( instanceId, _instanceLocalMatrix );

					_instanceWorldMatrix.multiplyMatrices( matrixWorld, _instanceLocalMatrix );

					// the mesh represents this single instance

					_mesh.matrixWorld = _instanceWorldMatrix;

					_mesh.raycast( raycaster, _instanceIntersects );

					// process the result of raycast

					for ( var i = 0, l = _instanceIntersects.length; i < l; i ++ ) {

						var intersect = _instanceIntersects[ i ];
						intersect.instanceId = instanceId;
						intersect.object = this;
						intersects.push( intersect );

					}

					_instanceIntersects.length = 0;

				}

			},

			setMatrixAt: function ( index, matrix ) {

				matrix.toArray( this.instanceMatrix.array, index * 16 );

			},

			updateMorphTargets: function () {

			}

		} );

		/**
		 * parameters = {
		 *  color: <hex>,
		 *  opacity: <float>,
		 *
		 *  linewidth: <float>,
		 *  linecap: "round",
		 *  linejoin: "round"
		 * }
		 */

		function LineBasicMaterial( parameters ) {

			Material.call( this );

			this.type = 'LineBasicMaterial';

			this.color = new Color( 0xffffff );

			this.linewidth = 1;
			this.linecap = 'round';
			this.linejoin = 'round';

			this.morphTargets = false;

			this.setValues( parameters );

		}

		LineBasicMaterial.prototype = Object.create( Material.prototype );
		LineBasicMaterial.prototype.constructor = LineBasicMaterial;

		LineBasicMaterial.prototype.isLineBasicMaterial = true;

		LineBasicMaterial.prototype.copy = function ( source ) {

			Material.prototype.copy.call( this, source );

			this.color.copy( source.color );

			this.linewidth = source.linewidth;
			this.linecap = source.linecap;
			this.linejoin = source.linejoin;

			this.morphTargets = source.morphTargets;

			return this;

		};

		var _start = new Vector3();
		var _end = new Vector3();
		var _inverseMatrix$1 = new Matrix4();
		var _ray$1 = new Ray();
		var _sphere$2 = new Sphere();

		function Line( geometry, material, mode ) {

			if ( mode === 1 ) {

				console.error( 'THREE.Line: parameter THREE.LinePieces no longer supported. Use THREE.LineSegments instead.' );

			}

			Object3D.call( this );

			this.type = 'Line';

			this.geometry = geometry !== undefined ? geometry : new BufferGeometry();
			this.material = material !== undefined ? material : new LineBasicMaterial();

			this.updateMorphTargets();

		}

		Line.prototype = Object.assign( Object.create( Object3D.prototype ), {

			constructor: Line,

			isLine: true,

			copy: function ( source ) {

				Object3D.prototype.copy.call( this, source );

				this.material = source.material;
				this.geometry = source.geometry;

				return this;

			},

			computeLineDistances: function () {

				var geometry = this.geometry;

				if ( geometry.isBufferGeometry ) {

					// we assume non-indexed geometry

					if ( geometry.index === null ) {

						var positionAttribute = geometry.attributes.position;
						var lineDistances = [ 0 ];

						for ( var i = 1, l = positionAttribute.count; i < l; i ++ ) {

							_start.fromBufferAttribute( positionAttribute, i - 1 );
							_end.fromBufferAttribute( positionAttribute, i );

							lineDistances[ i ] = lineDistances[ i - 1 ];
							lineDistances[ i ] += _start.distanceTo( _end );

						}

						geometry.setAttribute( 'lineDistance', new Float32BufferAttribute( lineDistances, 1 ) );

					} else {

						console.warn( 'THREE.Line.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.' );

					}

				} else if ( geometry.isGeometry ) {

					var vertices = geometry.vertices;
					var lineDistances$1 = geometry.lineDistances;

					lineDistances$1[ 0 ] = 0;

					for ( var i$1 = 1, l$1 = vertices.length; i$1 < l$1; i$1 ++ ) {

						lineDistances$1[ i$1 ] = lineDistances$1[ i$1 - 1 ];
						lineDistances$1[ i$1 ] += vertices[ i$1 - 1 ].distanceTo( vertices[ i$1 ] );

					}

				}

				return this;

			},

			raycast: function ( raycaster, intersects ) {

				var geometry = this.geometry;
				var matrixWorld = this.matrixWorld;
				var threshold = raycaster.params.Line.threshold;

				// Checking boundingSphere distance to ray

				if ( geometry.boundingSphere === null ) { geometry.computeBoundingSphere(); }

				_sphere$2.copy( geometry.boundingSphere );
				_sphere$2.applyMatrix4( matrixWorld );
				_sphere$2.radius += threshold;

				if ( raycaster.ray.intersectsSphere( _sphere$2 ) === false ) { return; }

				//

				_inverseMatrix$1.getInverse( matrixWorld );
				_ray$1.copy( raycaster.ray ).applyMatrix4( _inverseMatrix$1 );

				var localThreshold = threshold / ( ( this.scale.x + this.scale.y + this.scale.z ) / 3 );
				var localThresholdSq = localThreshold * localThreshold;

				var vStart = new Vector3();
				var vEnd = new Vector3();
				var interSegment = new Vector3();
				var interRay = new Vector3();
				var step = ( this && this.isLineSegments ) ? 2 : 1;

				if ( geometry.isBufferGeometry ) {

					var index = geometry.index;
					var attributes = geometry.attributes;
					var positions = attributes.position.array;

					if ( index !== null ) {

						var indices = index.array;

						for ( var i = 0, l = indices.length - 1; i < l; i += step ) {

							var a = indices[ i ];
							var b = indices[ i + 1 ];

							vStart.fromArray( positions, a * 3 );
							vEnd.fromArray( positions, b * 3 );

							var distSq = _ray$1.distanceSqToSegment( vStart, vEnd, interRay, interSegment );

							if ( distSq > localThresholdSq ) { continue; }

							interRay.applyMatrix4( this.matrixWorld ); //Move back to world space for distance calculation

							var distance = raycaster.ray.origin.distanceTo( interRay );

							if ( distance < raycaster.near || distance > raycaster.far ) { continue; }

							intersects.push( {

								distance: distance,
								// What do we want? intersection point on the ray or on the segment??
								// point: raycaster.ray.at( distance ),
								point: interSegment.clone().applyMatrix4( this.matrixWorld ),
								index: i,
								face: null,
								faceIndex: null,
								object: this

							} );

						}

					} else {

						for ( var i$1 = 0, l$1 = positions.length / 3 - 1; i$1 < l$1; i$1 += step ) {

							vStart.fromArray( positions, 3 * i$1 );
							vEnd.fromArray( positions, 3 * i$1 + 3 );

							var distSq$1 = _ray$1.distanceSqToSegment( vStart, vEnd, interRay, interSegment );

							if ( distSq$1 > localThresholdSq ) { continue; }

							interRay.applyMatrix4( this.matrixWorld ); //Move back to world space for distance calculation

							var distance$1 = raycaster.ray.origin.distanceTo( interRay );

							if ( distance$1 < raycaster.near || distance$1 > raycaster.far ) { continue; }

							intersects.push( {

								distance: distance$1,
								// What do we want? intersection point on the ray or on the segment??
								// point: raycaster.ray.at( distance ),
								point: interSegment.clone().applyMatrix4( this.matrixWorld ),
								index: i$1,
								face: null,
								faceIndex: null,
								object: this

							} );

						}

					}

				} else if ( geometry.isGeometry ) {

					var vertices = geometry.vertices;
					var nbVertices = vertices.length;

					for ( var i$2 = 0; i$2 < nbVertices - 1; i$2 += step ) {

						var distSq$2 = _ray$1.distanceSqToSegment( vertices[ i$2 ], vertices[ i$2 + 1 ], interRay, interSegment );

						if ( distSq$2 > localThresholdSq ) { continue; }

						interRay.applyMatrix4( this.matrixWorld ); //Move back to world space for distance calculation

						var distance$2 = raycaster.ray.origin.distanceTo( interRay );

						if ( distance$2 < raycaster.near || distance$2 > raycaster.far ) { continue; }

						intersects.push( {

							distance: distance$2,
							// What do we want? intersection point on the ray or on the segment??
							// point: raycaster.ray.at( distance ),
							point: interSegment.clone().applyMatrix4( this.matrixWorld ),
							index: i$2,
							face: null,
							faceIndex: null,
							object: this

						} );

					}

				}

			},

			updateMorphTargets: function () {

				var geometry = this.geometry;

				if ( geometry.isBufferGeometry ) {

					var morphAttributes = geometry.morphAttributes;
					var keys = Object.keys( morphAttributes );

					if ( keys.length > 0 ) {

						var morphAttribute = morphAttributes[ keys[ 0 ] ];

						if ( morphAttribute !== undefined ) {

							this.morphTargetInfluences = [];
							this.morphTargetDictionary = {};

							for ( var m = 0, ml = morphAttribute.length; m < ml; m ++ ) {

								var name = morphAttribute[ m ].name || String( m );

								this.morphTargetInfluences.push( 0 );
								this.morphTargetDictionary[ name ] = m;

							}

						}

					}

				} else {

					var morphTargets = geometry.morphTargets;

					if ( morphTargets !== undefined && morphTargets.length > 0 ) {

						console.error( 'THREE.Line.updateMorphTargets() does not support THREE.Geometry. Use THREE.BufferGeometry instead.' );

					}

				}

			}

		} );

		var _start$1 = new Vector3();
		var _end$1 = new Vector3();

		function LineSegments( geometry, material ) {

			Line.call( this, geometry, material );

			this.type = 'LineSegments';

		}

		LineSegments.prototype = Object.assign( Object.create( Line.prototype ), {

			constructor: LineSegments,

			isLineSegments: true,

			computeLineDistances: function () {

				var geometry = this.geometry;

				if ( geometry.isBufferGeometry ) {

					// we assume non-indexed geometry

					if ( geometry.index === null ) {

						var positionAttribute = geometry.attributes.position;
						var lineDistances = [];

						for ( var i = 0, l = positionAttribute.count; i < l; i += 2 ) {

							_start$1.fromBufferAttribute( positionAttribute, i );
							_end$1.fromBufferAttribute( positionAttribute, i + 1 );

							lineDistances[ i ] = ( i === 0 ) ? 0 : lineDistances[ i - 1 ];
							lineDistances[ i + 1 ] = lineDistances[ i ] + _start$1.distanceTo( _end$1 );

						}

						geometry.setAttribute( 'lineDistance', new Float32BufferAttribute( lineDistances, 1 ) );

					} else {

						console.warn( 'THREE.LineSegments.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.' );

					}

				} else if ( geometry.isGeometry ) {

					var vertices = geometry.vertices;
					var lineDistances$1 = geometry.lineDistances;

					for ( var i$1 = 0, l$1 = vertices.length; i$1 < l$1; i$1 += 2 ) {

						_start$1.copy( vertices[ i$1 ] );
						_end$1.copy( vertices[ i$1 + 1 ] );

						lineDistances$1[ i$1 ] = ( i$1 === 0 ) ? 0 : lineDistances$1[ i$1 - 1 ];
						lineDistances$1[ i$1 + 1 ] = lineDistances$1[ i$1 ] + _start$1.distanceTo( _end$1 );

					}

				}

				return this;

			}

		} );

		function LineLoop( geometry, material ) {

			Line.call( this, geometry, material );

			this.type = 'LineLoop';

		}

		LineLoop.prototype = Object.assign( Object.create( Line.prototype ), {

			constructor: LineLoop,

			isLineLoop: true,

		} );

		/**
		 * parameters = {
		 *  color: <hex>,
		 *  opacity: <float>,
		 *  map: new THREE.Texture( <Image> ),
		 *  alphaMap: new THREE.Texture( <Image> ),
		 *
		 *  size: <float>,
		 *  sizeAttenuation: <bool>
		 *
		 *  morphTargets: <bool>
		 * }
		 */

		function PointsMaterial( parameters ) {

			Material.call( this );

			this.type = 'PointsMaterial';

			this.color = new Color( 0xffffff );

			this.map = null;

			this.alphaMap = null;

			this.size = 1;
			this.sizeAttenuation = true;

			this.morphTargets = false;

			this.setValues( parameters );

		}

		PointsMaterial.prototype = Object.create( Material.prototype );
		PointsMaterial.prototype.constructor = PointsMaterial;

		PointsMaterial.prototype.isPointsMaterial = true;

		PointsMaterial.prototype.copy = function ( source ) {

			Material.prototype.copy.call( this, source );

			this.color.copy( source.color );

			this.map = source.map;

			this.alphaMap = source.alphaMap;

			this.size = source.size;
			this.sizeAttenuation = source.sizeAttenuation;

			this.morphTargets = source.morphTargets;

			return this;

		};

		var _inverseMatrix$2 = new Matrix4();
		var _ray$2 = new Ray();
		var _sphere$3 = new Sphere();
		var _position$1 = new Vector3();

		function Points( geometry, material ) {

			Object3D.call( this );

			this.type = 'Points';

			this.geometry = geometry !== undefined ? geometry : new BufferGeometry();
			this.material = material !== undefined ? material : new PointsMaterial();

			this.updateMorphTargets();

		}

		Points.prototype = Object.assign( Object.create( Object3D.prototype ), {

			constructor: Points,

			isPoints: true,

			copy: function ( source ) {

				Object3D.prototype.copy.call( this, source );

				this.material = source.material;
				this.geometry = source.geometry;

				return this;

			},

			raycast: function ( raycaster, intersects ) {

				var geometry = this.geometry;
				var matrixWorld = this.matrixWorld;
				var threshold = raycaster.params.Points.threshold;

				// Checking boundingSphere distance to ray

				if ( geometry.boundingSphere === null ) { geometry.computeBoundingSphere(); }

				_sphere$3.copy( geometry.boundingSphere );
				_sphere$3.applyMatrix4( matrixWorld );
				_sphere$3.radius += threshold;

				if ( raycaster.ray.intersectsSphere( _sphere$3 ) === false ) { return; }

				//

				_inverseMatrix$2.getInverse( matrixWorld );
				_ray$2.copy( raycaster.ray ).applyMatrix4( _inverseMatrix$2 );

				var localThreshold = threshold / ( ( this.scale.x + this.scale.y + this.scale.z ) / 3 );
				var localThresholdSq = localThreshold * localThreshold;

				if ( geometry.isBufferGeometry ) {

					var index = geometry.index;
					var attributes = geometry.attributes;
					var positions = attributes.position.array;

					if ( index !== null ) {

						var indices = index.array;

						for ( var i = 0, il = indices.length; i < il; i ++ ) {

							var a = indices[ i ];

							_position$1.fromArray( positions, a * 3 );

							testPoint( _position$1, a, localThresholdSq, matrixWorld, raycaster, intersects, this );

						}

					} else {

						for ( var i$1 = 0, l = positions.length / 3; i$1 < l; i$1 ++ ) {

							_position$1.fromArray( positions, i$1 * 3 );

							testPoint( _position$1, i$1, localThresholdSq, matrixWorld, raycaster, intersects, this );

						}

					}

				} else {

					var vertices = geometry.vertices;

					for ( var i$2 = 0, l$1 = vertices.length; i$2 < l$1; i$2 ++ ) {

						testPoint( vertices[ i$2 ], i$2, localThresholdSq, matrixWorld, raycaster, intersects, this );

					}

				}

			},

			updateMorphTargets: function () {

				var geometry = this.geometry;

				if ( geometry.isBufferGeometry ) {

					var morphAttributes = geometry.morphAttributes;
					var keys = Object.keys( morphAttributes );

					if ( keys.length > 0 ) {

						var morphAttribute = morphAttributes[ keys[ 0 ] ];

						if ( morphAttribute !== undefined ) {

							this.morphTargetInfluences = [];
							this.morphTargetDictionary = {};

							for ( var m = 0, ml = morphAttribute.length; m < ml; m ++ ) {

								var name = morphAttribute[ m ].name || String( m );

								this.morphTargetInfluences.push( 0 );
								this.morphTargetDictionary[ name ] = m;

							}

						}

					}

				} else {

					var morphTargets = geometry.morphTargets;

					if ( morphTargets !== undefined && morphTargets.length > 0 ) {

						console.error( 'THREE.Points.updateMorphTargets() does not support THREE.Geometry. Use THREE.BufferGeometry instead.' );

					}

				}

			}

		} );

		function testPoint( point, index, localThresholdSq, matrixWorld, raycaster, intersects, object ) {

			var rayPointDistanceSq = _ray$2.distanceSqToPoint( point );

			if ( rayPointDistanceSq < localThresholdSq ) {

				var intersectPoint = new Vector3();

				_ray$2.closestPointToPoint( point, intersectPoint );
				intersectPoint.applyMatrix4( matrixWorld );

				var distance = raycaster.ray.origin.distanceTo( intersectPoint );

				if ( distance < raycaster.near || distance > raycaster.far ) { return; }

				intersects.push( {

					distance: distance,
					distanceToRay: Math.sqrt( rayPointDistanceSq ),
					point: intersectPoint,
					index: index,
					face: null,
					object: object

				} );

			}

		}

		function VideoTexture( video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy ) {

			Texture.call( this, video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy );

			this.format = format !== undefined ? format : RGBFormat;

			this.minFilter = minFilter !== undefined ? minFilter : LinearFilter;
			this.magFilter = magFilter !== undefined ? magFilter : LinearFilter;

			this.generateMipmaps = false;

			var scope = this;

			function updateVideo() {

				scope.needsUpdate = true;
				video.requestVideoFrameCallback( updateVideo );

			}

			if ( 'requestVideoFrameCallback' in video ) {

				video.requestVideoFrameCallback( updateVideo );

			}

		}

		VideoTexture.prototype = Object.assign( Object.create( Texture.prototype ), {

			constructor: VideoTexture,

			isVideoTexture: true,

			update: function () {

				var video = this.image;
				var hasVideoFrameCallback = 'requestVideoFrameCallback' in video;

				if ( hasVideoFrameCallback === false && video.readyState >= video.HAVE_CURRENT_DATA ) {

					this.needsUpdate = true;

				}

			}

		} );

		function CompressedTexture( mipmaps, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, encoding ) {

			Texture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );

			this.image = { width: width, height: height };
			this.mipmaps = mipmaps;

			// no flipping for cube textures
			// (also flipping doesn't work for compressed textures )

			this.flipY = false;

			// can't generate mipmaps for compressed textures
			// mips must be embedded in DDS files

			this.generateMipmaps = false;

		}

		CompressedTexture.prototype = Object.create( Texture.prototype );
		CompressedTexture.prototype.constructor = CompressedTexture;

		CompressedTexture.prototype.isCompressedTexture = true;

		function CanvasTexture( canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy ) {

			Texture.call( this, canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy );

			this.needsUpdate = true;

		}

		CanvasTexture.prototype = Object.create( Texture.prototype );
		CanvasTexture.prototype.constructor = CanvasTexture;
		CanvasTexture.prototype.isCanvasTexture = true;

		function DepthTexture( width, height, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, format ) {

			format = format !== undefined ? format : DepthFormat;

			if ( format !== DepthFormat && format !== DepthStencilFormat ) {

				throw new Error( 'DepthTexture format must be either THREE.DepthFormat or THREE.DepthStencilFormat' );

			}

			if ( type === undefined && format === DepthFormat ) { type = UnsignedShortType; }
			if ( type === undefined && format === DepthStencilFormat ) { type = UnsignedInt248Type; }

			Texture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy );

			this.image = { width: width, height: height };

			this.magFilter = magFilter !== undefined ? magFilter : NearestFilter;
			this.minFilter = minFilter !== undefined ? minFilter : NearestFilter;

			this.flipY = false;
			this.generateMipmaps	= false;

		}

		DepthTexture.prototype = Object.create( Texture.prototype );
		DepthTexture.prototype.constructor = DepthTexture;
		DepthTexture.prototype.isDepthTexture = true;

		function WireframeGeometry( geometry ) {

				BufferGeometry.call(this);
				this.type = 'WireframeGeometry';

				// buffer

				var vertices = [];

				// helper variables

				var edge = [ 0, 0 ], edges = {};
				var keys = [ 'a', 'b', 'c' ];

				// different logic for Geometry and BufferGeometry

				if ( geometry && geometry.isGeometry ) {

					// create a data structure that contains all edges without duplicates

					var faces = geometry.faces;

					for ( var i = 0, l = faces.length; i < l; i ++ ) {

						var face = faces[ i ];

						for ( var j = 0; j < 3; j ++ ) {

							var edge1 = face[ keys[ j ] ];
							var edge2 = face[ keys[ ( j + 1 ) % 3 ] ];
							edge[ 0 ] = Math.min( edge1, edge2 ); // sorting prevents duplicates
							edge[ 1 ] = Math.max( edge1, edge2 );

							var key = edge[ 0 ] + ',' + edge[ 1 ];

							if ( edges[ key ] === undefined ) {

								edges[ key ] = { index1: edge[ 0 ], index2: edge[ 1 ] };

							}

						}

					}

					// generate vertices

					for ( var key$1 in edges ) {

						var e = edges[ key$1 ];

						var vertex = geometry.vertices[ e.index1 ];
						vertices.push( vertex.x, vertex.y, vertex.z );

						vertex = geometry.vertices[ e.index2 ];
						vertices.push( vertex.x, vertex.y, vertex.z );

					}

				} else if ( geometry && geometry.isBufferGeometry ) {

					var vertex$1 = new Vector3();

					if ( geometry.index !== null ) {

						// indexed BufferGeometry

						var position = geometry.attributes.position;
						var indices = geometry.index;
						var groups = geometry.groups;

						if ( groups.length === 0 ) {

							groups = [ { start: 0, count: indices.count, materialIndex: 0 } ];

						}

						// create a data structure that contains all eges without duplicates

						for ( var o = 0, ol = groups.length; o < ol; ++ o ) {

							var group = groups[ o ];

							var start = group.start;
							var count = group.count;

							for ( var i$1 = start, l$1 = ( start + count ); i$1 < l$1; i$1 += 3 ) {

								for ( var j$1 = 0; j$1 < 3; j$1 ++ ) {

									var edge1$1 = indices.getX( i$1 + j$1 );
									var edge2$1 = indices.getX( i$1 + ( j$1 + 1 ) % 3 );
									edge[ 0 ] = Math.min( edge1$1, edge2$1 ); // sorting prevents duplicates
									edge[ 1 ] = Math.max( edge1$1, edge2$1 );

									var key$2 = edge[ 0 ] + ',' + edge[ 1 ];

									if ( edges[ key$2 ] === undefined ) {

										edges[ key$2 ] = { index1: edge[ 0 ], index2: edge[ 1 ] };

									}

								}

							}

						}

						// generate vertices

						for ( var key$3 in edges ) {

							var e$1 = edges[ key$3 ];

							vertex$1.fromBufferAttribute( position, e$1.index1 );
							vertices.push( vertex$1.x, vertex$1.y, vertex$1.z );

							vertex$1.fromBufferAttribute( position, e$1.index2 );
							vertices.push( vertex$1.x, vertex$1.y, vertex$1.z );

						}

					} else {

						// non-indexed BufferGeometry

						var position$1 = geometry.attributes.position;

						for ( var i$2 = 0, l$2 = ( position$1.count / 3 ); i$2 < l$2; i$2 ++ ) {

							for ( var j$2 = 0; j$2 < 3; j$2 ++ ) {

								// three edges per triangle, an edge is represented as (index1, index2)
								// e.g. the first triangle has the following edges: (0,1),(1,2),(2,0)

								var index1 = 3 * i$2 + j$2;
								vertex$1.fromBufferAttribute( position$1, index1 );
								vertices.push( vertex$1.x, vertex$1.y, vertex$1.z );

								var index2 = 3 * i$2 + ( ( j$2 + 1 ) % 3 );
								vertex$1.fromBufferAttribute( position$1, index2 );
								vertices.push( vertex$1.x, vertex$1.y, vertex$1.z );

							}

						}

					}

				}

				// build geometry

				this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );

			}

			WireframeGeometry.prototype = Object.create( BufferGeometry.prototype );
			WireframeGeometry.prototype.constructor = WireframeGeometry;

		/**
		 * Parametric Surfaces Geometry
		 * based on the brilliant article by @prideout https://prideout.net/blog/old/blog/index.html@p=44.html
		 */

		// ParametricGeometry

		function ParametricGeometry( func, slices, stacks ) {

			Geometry.call( this );

			this.type = 'ParametricGeometry';

			this.parameters = {
				func: func,
				slices: slices,
				stacks: stacks
			};

			this.fromBufferGeometry( new ParametricBufferGeometry( func, slices, stacks ) );
			this.mergeVertices();

		}

		ParametricGeometry.prototype = Object.create( Geometry.prototype );
		ParametricGeometry.prototype.constructor = ParametricGeometry;

		// ParametricBufferGeometry

		function ParametricBufferGeometry( func, slices, stacks ) {

			BufferGeometry.call( this );

			this.type = 'ParametricBufferGeometry';

			this.parameters = {
				func: func,
				slices: slices,
				stacks: stacks
			};

			// buffers

			var indices = [];
			var vertices = [];
			var normals = [];
			var uvs = [];

			var EPS = 0.00001;

			var normal = new Vector3();

			var p0 = new Vector3(), p1 = new Vector3();
			var pu = new Vector3(), pv = new Vector3();

			if ( func.length < 3 ) {

				console.error( 'THREE.ParametricGeometry: Function must now modify a Vector3 as third parameter.' );

			}

			// generate vertices, normals and uvs

			var sliceCount = slices + 1;

			for ( var i = 0; i <= stacks; i ++ ) {

				var v = i / stacks;

				for ( var j = 0; j <= slices; j ++ ) {

					var u = j / slices;

					// vertex

					func( u, v, p0 );
					vertices.push( p0.x, p0.y, p0.z );

					// normal

					// approximate tangent vectors via finite differences

					if ( u - EPS >= 0 ) {

						func( u - EPS, v, p1 );
						pu.subVectors( p0, p1 );

					} else {

						func( u + EPS, v, p1 );
						pu.subVectors( p1, p0 );

					}

					if ( v - EPS >= 0 ) {

						func( u, v - EPS, p1 );
						pv.subVectors( p0, p1 );

					} else {

						func( u, v + EPS, p1 );
						pv.subVectors( p1, p0 );

					}

					// cross product of tangent vectors returns surface normal

					normal.crossVectors( pu, pv ).normalize();
					normals.push( normal.x, normal.y, normal.z );

					// uv

					uvs.push( u, v );

				}

			}

			// generate indices

			for ( var i$1 = 0; i$1 < stacks; i$1 ++ ) {

				for ( var j$1 = 0; j$1 < slices; j$1 ++ ) {

					var a = i$1 * sliceCount + j$1;
					var b = i$1 * sliceCount + j$1 + 1;
					var c = ( i$1 + 1 ) * sliceCount + j$1 + 1;
					var d = ( i$1 + 1 ) * sliceCount + j$1;

					// faces one and two

					indices.push( a, b, d );
					indices.push( b, c, d );

				}

			}

			// build geometry

			this.setIndex( indices );
			this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
			this.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
			this.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

		}

		ParametricBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
		ParametricBufferGeometry.prototype.constructor = ParametricBufferGeometry;

		// PolyhedronGeometry

			function PolyhedronGeometry( vertices, indices, radius, detail ) {

				Geometry.call(this);

				this.type = 'PolyhedronGeometry';

				this.parameters = {
					vertices: vertices,
					indices: indices,
					radius: radius,
					detail: detail
				};

				this.fromBufferGeometry( new PolyhedronBufferGeometry( vertices, indices, radius, detail ) );
				this.mergeVertices();

			}

			PolyhedronGeometry.prototype = Object.create( Geometry.prototype );
			PolyhedronGeometry.prototype.constructor = PolyhedronGeometry;

		// PolyhedronBufferGeometry

			function PolyhedronBufferGeometry( vertices, indices, radius, detail ) {

				BufferGeometry.call(this);

				this.type = 'PolyhedronBufferGeometry';

				this.parameters = {
					vertices: vertices,
					indices: indices,
					radius: radius,
					detail: detail
				};

				radius = radius || 1;
				detail = detail || 0;

				// default buffer data

				var vertexBuffer = [];
				var uvBuffer = [];

				// the subdivision creates the vertex buffer data

				subdivide( detail );

				// all vertices should lie on a conceptual sphere with a given radius

				applyRadius( radius );

				// finally, create the uv data

				generateUVs();

				// build non-indexed geometry

				this.setAttribute( 'position', new Float32BufferAttribute( vertexBuffer, 3 ) );
				this.setAttribute( 'normal', new Float32BufferAttribute( vertexBuffer.slice(), 3 ) );
				this.setAttribute( 'uv', new Float32BufferAttribute( uvBuffer, 2 ) );

				if ( detail === 0 ) {

					this.computeVertexNormals(); // flat normals

				} else {

					this.normalizeNormals(); // smooth normals

				}

				// helper functions

				function subdivide( detail ) {

					var a = new Vector3();
					var b = new Vector3();
					var c = new Vector3();

					// iterate over all faces and apply a subdivison with the given detail value

					for ( var i = 0; i < indices.length; i += 3 ) {

						// get the vertices of the face

						getVertexByIndex( indices[ i + 0 ], a );
						getVertexByIndex( indices[ i + 1 ], b );
						getVertexByIndex( indices[ i + 2 ], c );

						// perform subdivision

						subdivideFace( a, b, c, detail );

					}

				}

				function subdivideFace( a, b, c, detail ) {

					var cols = Math.pow( 2, detail );

					// we use this multidimensional array as a data structure for creating the subdivision

					var v = [];

					// construct all of the vertices for this subdivision

					for ( var i = 0; i <= cols; i ++ ) {

						v[ i ] = [];

						var aj = a.clone().lerp( c, i / cols );
						var bj = b.clone().lerp( c, i / cols );

						var rows = cols - i;

						for ( var j = 0; j <= rows; j ++ ) {

							if ( j === 0 && i === cols ) {

								v[ i ][ j ] = aj;

							} else {

								v[ i ][ j ] = aj.clone().lerp( bj, j / rows );

							}

						}

					}

					// construct all of the faces

					for ( var i$1 = 0; i$1 < cols; i$1 ++ ) {

						for ( var j$1 = 0; j$1 < 2 * ( cols - i$1 ) - 1; j$1 ++ ) {

							var k = Math.floor( j$1 / 2 );

							if ( j$1 % 2 === 0 ) {

								pushVertex( v[ i$1 ][ k + 1 ] );
								pushVertex( v[ i$1 + 1 ][ k ] );
								pushVertex( v[ i$1 ][ k ] );

							} else {

								pushVertex( v[ i$1 ][ k + 1 ] );
								pushVertex( v[ i$1 + 1 ][ k + 1 ] );
								pushVertex( v[ i$1 + 1 ][ k ] );

							}

						}

					}

				}

				function applyRadius( radius ) {

					var vertex = new Vector3();

					// iterate over the entire buffer and apply the radius to each vertex

					for ( var i = 0; i < vertexBuffer.length; i += 3 ) {

						vertex.x = vertexBuffer[ i + 0 ];
						vertex.y = vertexBuffer[ i + 1 ];
						vertex.z = vertexBuffer[ i + 2 ];

						vertex.normalize().multiplyScalar( radius );

						vertexBuffer[ i + 0 ] = vertex.x;
						vertexBuffer[ i + 1 ] = vertex.y;
						vertexBuffer[ i + 2 ] = vertex.z;

					}

				}

				function generateUVs() {

					var vertex = new Vector3();

					for ( var i = 0; i < vertexBuffer.length; i += 3 ) {

						vertex.x = vertexBuffer[ i + 0 ];
						vertex.y = vertexBuffer[ i + 1 ];
						vertex.z = vertexBuffer[ i + 2 ];

						var u = azimuth( vertex ) / 2 / Math.PI + 0.5;
						var v = inclination( vertex ) / Math.PI + 0.5;
						uvBuffer.push( u, 1 - v );

					}

					correctUVs();

					correctSeam();

				}

				function correctSeam() {

					// handle case when face straddles the seam, see #3269

					for ( var i = 0; i < uvBuffer.length; i += 6 ) {

						// uv data of a single face

						var x0 = uvBuffer[ i + 0 ];
						var x1 = uvBuffer[ i + 2 ];
						var x2 = uvBuffer[ i + 4 ];

						var max = Math.max( x0, x1, x2 );
						var min = Math.min( x0, x1, x2 );

						// 0.9 is somewhat arbitrary

						if ( max > 0.9 && min < 0.1 ) {

							if ( x0 < 0.2 ) { uvBuffer[ i + 0 ] += 1; }
							if ( x1 < 0.2 ) { uvBuffer[ i + 2 ] += 1; }
							if ( x2 < 0.2 ) { uvBuffer[ i + 4 ] += 1; }

						}

					}

				}

				function pushVertex( vertex ) {

					vertexBuffer.push( vertex.x, vertex.y, vertex.z );

				}

				function getVertexByIndex( index, vertex ) {

					var stride = index * 3;

					vertex.x = vertices[ stride + 0 ];
					vertex.y = vertices[ stride + 1 ];
					vertex.z = vertices[ stride + 2 ];

				}

				function correctUVs() {

					var a = new Vector3();
					var b = new Vector3();
					var c = new Vector3();

					var centroid = new Vector3();

					var uvA = new Vector2();
					var uvB = new Vector2();
					var uvC = new Vector2();

					for ( var i = 0, j = 0; i < vertexBuffer.length; i += 9, j += 6 ) {

						a.set( vertexBuffer[ i + 0 ], vertexBuffer[ i + 1 ], vertexBuffer[ i + 2 ] );
						b.set( vertexBuffer[ i + 3 ], vertexBuffer[ i + 4 ], vertexBuffer[ i + 5 ] );
						c.set( vertexBuffer[ i + 6 ], vertexBuffer[ i + 7 ], vertexBuffer[ i + 8 ] );

						uvA.set( uvBuffer[ j + 0 ], uvBuffer[ j + 1 ] );
						uvB.set( uvBuffer[ j + 2 ], uvBuffer[ j + 3 ] );
						uvC.set( uvBuffer[ j + 4 ], uvBuffer[ j + 5 ] );

						centroid.copy( a ).add( b ).add( c ).divideScalar( 3 );

						var azi = azimuth( centroid );

						correctUV( uvA, j + 0, a, azi );
						correctUV( uvB, j + 2, b, azi );
						correctUV( uvC, j + 4, c, azi );

					}

				}

				function correctUV( uv, stride, vector, azimuth ) {

					if ( ( azimuth < 0 ) && ( uv.x === 1 ) ) {

						uvBuffer[ stride ] = uv.x - 1;

					}

					if ( ( vector.x === 0 ) && ( vector.z === 0 ) ) {

						uvBuffer[ stride ] = azimuth / 2 / Math.PI + 0.5;

					}

				}

				// Angle around the Y axis, counter-clockwise when looking from above.

				function azimuth( vector ) {

					return Math.atan2( vector.z, - vector.x );

				}


				// Angle above the XZ plane.

				function inclination( vector ) {

					return Math.atan2( - vector.y, Math.sqrt( ( vector.x * vector.x ) + ( vector.z * vector.z ) ) );

				}

			}

			PolyhedronBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
			PolyhedronBufferGeometry.prototype.constructor = PolyhedronBufferGeometry;

		// TetrahedronGeometry

			function TetrahedronGeometry( radius, detail ) {

				Geometry.call(this);
				this.type = 'TetrahedronGeometry';

				this.parameters = {
					radius: radius,
					detail: detail
				};

				this.fromBufferGeometry( new TetrahedronBufferGeometry( radius, detail ) );
				this.mergeVertices();

			}

			TetrahedronGeometry.prototype = Object.create( Geometry.prototype );
			TetrahedronGeometry.prototype.constructor = TetrahedronGeometry;


		// TetrahedronBufferGeometry

			function TetrahedronBufferGeometry( radius, detail ) {

				var vertices = [
					1, 1, 1, 	- 1, - 1, 1, 	- 1, 1, - 1, 	1, - 1, - 1
				];

				var indices = [
					2, 1, 0, 	0, 3, 2,	1, 3, 0,	2, 3, 1
				];

				PolyhedronBufferGeometry.call( this, vertices, indices, radius, detail );

				this.type = 'TetrahedronBufferGeometry';

				this.parameters = {
					radius: radius,
					detail: detail
				};

			}

			TetrahedronBufferGeometry.prototype = Object.create( PolyhedronBufferGeometry.prototype );
			TetrahedronBufferGeometry.prototype.constructor = TetrahedronBufferGeometry;

		// OctahedronGeometry

			function OctahedronGeometry( radius, detail ) {

				Geometry.call(this);

				this.type = 'OctahedronGeometry';

				this.parameters = {
					radius: radius,
					detail: detail
				};

				this.fromBufferGeometry( new OctahedronBufferGeometry( radius, detail ) );
				this.mergeVertices();

			}

			OctahedronGeometry.prototype = Object.create( Geometry.prototype );
			OctahedronGeometry.prototype.constructor = OctahedronGeometry;

		// OctahedronBufferGeometry

			function OctahedronBufferGeometry( radius, detail ) {

				var vertices = [
					1, 0, 0, 	- 1, 0, 0,	0, 1, 0,
					0, - 1, 0, 	0, 0, 1,	0, 0, - 1
				];

				var indices = [
					0, 2, 4,	0, 4, 3,	0, 3, 5,
					0, 5, 2,	1, 2, 5,	1, 5, 3,
					1, 3, 4,	1, 4, 2
				];

				PolyhedronBufferGeometry.call( this, vertices, indices, radius, detail );

				this.type = 'OctahedronBufferGeometry';

				this.parameters = {
					radius: radius,
					detail: detail
				};

			}

			OctahedronBufferGeometry.prototype = Object.create( PolyhedronBufferGeometry.prototype );
			OctahedronBufferGeometry.prototype.constructor = OctahedronBufferGeometry;

		// IcosahedronGeometry

			function IcosahedronGeometry( radius, detail ) {

				Geometry.call(this);

				this.type = 'IcosahedronGeometry';

				this.parameters = {
					radius: radius,
					detail: detail
				};

				this.fromBufferGeometry( new IcosahedronBufferGeometry( radius, detail ) );
				this.mergeVertices();

			}

			IcosahedronGeometry.prototype = Object.create( Geometry.prototype );
			IcosahedronGeometry.prototype.constructor = IcosahedronGeometry;

		// IcosahedronBufferGeometry

			function IcosahedronBufferGeometry( radius, detail ) {

				var t = ( 1 + Math.sqrt( 5 ) ) / 2;

				var vertices = [
					- 1, t, 0, 	1, t, 0, 	- 1, - t, 0, 	1, - t, 0,
					0, - 1, t, 	0, 1, t,	0, - 1, - t, 	0, 1, - t,
					t, 0, - 1, 	t, 0, 1, 	- t, 0, - 1, 	- t, 0, 1
				];

				var indices = [
					0, 11, 5, 	0, 5, 1, 	0, 1, 7, 	0, 7, 10, 	0, 10, 11,
					1, 5, 9, 	5, 11, 4,	11, 10, 2,	10, 7, 6,	7, 1, 8,
					3, 9, 4, 	3, 4, 2,	3, 2, 6,	3, 6, 8,	3, 8, 9,
					4, 9, 5, 	2, 4, 11,	6, 2, 10,	8, 6, 7,	9, 8, 1
				];

				PolyhedronBufferGeometry.call( this, vertices, indices, radius, detail );

				this.type = 'IcosahedronBufferGeometry';

				this.parameters = {
					radius: radius,
					detail: detail
				};

			}

			IcosahedronBufferGeometry.prototype = Object.create( PolyhedronBufferGeometry.prototype );
			IcosahedronBufferGeometry.prototype.constructor = IcosahedronBufferGeometry;

		// DodecahedronGeometry

			function DodecahedronGeometry( radius, detail ) {

				Geometry.call(this);
				this.type = 'DodecahedronGeometry';

				this.parameters = {
					radius: radius,
					detail: detail
				};

				this.fromBufferGeometry( new DodecahedronBufferGeometry( radius, detail ) );
				this.mergeVertices();

			}

			DodecahedronGeometry.prototype = Object.create( Geometry.prototype );
			DodecahedronGeometry.prototype.constructor = DodecahedronGeometry;

		// DodecahedronBufferGeometry

			function DodecahedronBufferGeometry( radius, detail ) {

				var t = ( 1 + Math.sqrt( 5 ) ) / 2;
				var r = 1 / t;

				var vertices = [

					// (±1, ±1, ±1)
					- 1, - 1, - 1,	- 1, - 1, 1,
					- 1, 1, - 1, - 1, 1, 1,
					1, - 1, - 1, 1, - 1, 1,
					1, 1, - 1, 1, 1, 1,

					// (0, ±1/φ, ±φ)
					0, - r, - t, 0, - r, t,
					0, r, - t, 0, r, t,

					// (±1/φ, ±φ, 0)
					- r, - t, 0, - r, t, 0,
					r, - t, 0, r, t, 0,

					// (±φ, 0, ±1/φ)
					- t, 0, - r, t, 0, - r,
					- t, 0, r, t, 0, r
				];

				var indices = [
					3, 11, 7, 	3, 7, 15, 	3, 15, 13,
					7, 19, 17, 	7, 17, 6, 	7, 6, 15,
					17, 4, 8, 	17, 8, 10, 	17, 10, 6,
					8, 0, 16, 	8, 16, 2, 	8, 2, 10,
					0, 12, 1, 	0, 1, 18, 	0, 18, 16,
					6, 10, 2, 	6, 2, 13, 	6, 13, 15,
					2, 16, 18, 	2, 18, 3, 	2, 3, 13,
					18, 1, 9, 	18, 9, 11, 	18, 11, 3,
					4, 14, 12, 	4, 12, 0, 	4, 0, 8,
					11, 9, 5, 	11, 5, 19, 	11, 19, 7,
					19, 5, 14, 	19, 14, 4, 	19, 4, 17,
					1, 12, 14, 	1, 14, 5, 	1, 5, 9
				];

				PolyhedronBufferGeometry.call( this, vertices, indices, radius, detail );

				this.type = 'DodecahedronBufferGeometry';

				this.parameters = {
					radius: radius,
					detail: detail
				};

			}

			DodecahedronBufferGeometry.prototype = Object.create( PolyhedronBufferGeometry.prototype );
			DodecahedronBufferGeometry.prototype.constructor = DodecahedronBufferGeometry;

		// TubeGeometry

			function TubeGeometry( path, tubularSegments, radius, radialSegments, closed, taper ) {

				Geometry.call(this);
				this.type = 'TubeGeometry';

				this.parameters = {
					path: path,
					tubularSegments: tubularSegments,
					radius: radius,
					radialSegments: radialSegments,
					closed: closed
				};

				if ( taper !== undefined ) { console.warn( 'THREE.TubeGeometry: taper has been removed.' ); }

				var bufferGeometry = new TubeBufferGeometry( path, tubularSegments, radius, radialSegments, closed );

				// expose internals

				this.tangents = bufferGeometry.tangents;
				this.normals = bufferGeometry.normals;
				this.binormals = bufferGeometry.binormals;

				// create geometry

				this.fromBufferGeometry( bufferGeometry );
				this.mergeVertices();

			}

			TubeGeometry.prototype = Object.create( Geometry.prototype );
			TubeGeometry.prototype.constructor = TubeGeometry;


		// TubeBufferGeometry

			function TubeBufferGeometry( path, tubularSegments, radius, radialSegments, closed ) {

				BufferGeometry.call(this);
				this.type = 'TubeBufferGeometry';

				this.parameters = {
					path: path,
					tubularSegments: tubularSegments,
					radius: radius,
					radialSegments: radialSegments,
					closed: closed
				};

				tubularSegments = tubularSegments || 64;
				radius = radius || 1;
				radialSegments = radialSegments || 8;
				closed = closed || false;

				var frames = path.computeFrenetFrames( tubularSegments, closed );

				// expose internals

				this.tangents = frames.tangents;
				this.normals = frames.normals;
				this.binormals = frames.binormals;

				// helper variables

				var vertex = new Vector3();
				var normal = new Vector3();
				var uv = new Vector2();
				var P = new Vector3();

				// buffer

				var vertices = [];
				var normals = [];
				var uvs = [];
				var indices = [];

				// create buffer data

				generateBufferData();

				// build geometry

				this.setIndex( indices );
				this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
				this.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
				this.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

				// functions

				function generateBufferData() {

					for ( var i = 0; i < tubularSegments; i ++ ) {

						generateSegment( i );

					}

					// if the geometry is not closed, generate the last row of vertices and normals
					// at the regular position on the given path
					//
					// if the geometry is closed, duplicate the first row of vertices and normals (uvs will differ)

					generateSegment( ( closed === false ) ? tubularSegments : 0 );

					// uvs are generated in a separate function.
					// this makes it easy compute correct values for closed geometries

					generateUVs();

					// finally create faces

					generateIndices();

				}

				function generateSegment( i ) {

					// we use getPointAt to sample evenly distributed points from the given path

					P = path.getPointAt( i / tubularSegments, P );

					// retrieve corresponding normal and binormal

					var N = frames.normals[ i ];
					var B = frames.binormals[ i ];

					// generate normals and vertices for the current segment

					for ( var j = 0; j <= radialSegments; j ++ ) {

						var v = j / radialSegments * Math.PI * 2;

						var sin = Math.sin( v );
						var cos = - Math.cos( v );

						// normal

						normal.x = ( cos * N.x + sin * B.x );
						normal.y = ( cos * N.y + sin * B.y );
						normal.z = ( cos * N.z + sin * B.z );
						normal.normalize();

						normals.push( normal.x, normal.y, normal.z );

						// vertex

						vertex.x = P.x + radius * normal.x;
						vertex.y = P.y + radius * normal.y;
						vertex.z = P.z + radius * normal.z;

						vertices.push( vertex.x, vertex.y, vertex.z );

					}

				}

				function generateIndices() {

					for ( var j = 1; j <= tubularSegments; j ++ ) {

						for ( var i = 1; i <= radialSegments; i ++ ) {

							var a = ( radialSegments + 1 ) * ( j - 1 ) + ( i - 1 );
							var b = ( radialSegments + 1 ) * j + ( i - 1 );
							var c = ( radialSegments + 1 ) * j + i;
							var d = ( radialSegments + 1 ) * ( j - 1 ) + i;

							// faces

							indices.push( a, b, d );
							indices.push( b, c, d );

						}

					}

				}

				function generateUVs() {

					for ( var i = 0; i <= tubularSegments; i ++ ) {

						for ( var j = 0; j <= radialSegments; j ++ ) {

							uv.x = i / tubularSegments;
							uv.y = j / radialSegments;

							uvs.push( uv.x, uv.y );

						}

					}

				}

			}

			TubeBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
			TubeBufferGeometry.prototype.constructor = TubeBufferGeometry;
			TubeBufferGeometry.prototype.toJSON = function toJSON () {

				var data = BufferGeometry.prototype.toJSON.call( this );

				data.path = this.parameters.path.toJSON();

				return data;

			};

		// TorusKnotGeometry

			function TorusKnotGeometry( radius, tube, tubularSegments, radialSegments, p, q, heightScale ) {

				Geometry.call(this);
				this.type = 'TorusKnotGeometry';

				this.parameters = {
					radius: radius,
					tube: tube,
					tubularSegments: tubularSegments,
					radialSegments: radialSegments,
					p: p,
					q: q
				};

				if ( heightScale !== undefined ) { console.warn( 'THREE.TorusKnotGeometry: heightScale has been deprecated. Use .scale( x, y, z ) instead.' ); }

				this.fromBufferGeometry( new TorusKnotBufferGeometry( radius, tube, tubularSegments, radialSegments, p, q ) );
				this.mergeVertices();

			}

			TorusKnotGeometry.prototype = Object.create( Geometry.prototype );
			TorusKnotGeometry.prototype.constructor = TorusKnotGeometry;


		// TorusKnotBufferGeometry

			function TorusKnotBufferGeometry( radius, tube, tubularSegments, radialSegments, p, q ) {

				BufferGeometry.call(this);
				this.type = 'TorusKnotBufferGeometry';

				this.parameters = {
					radius: radius,
					tube: tube,
					tubularSegments: tubularSegments,
					radialSegments: radialSegments,
					p: p,
					q: q
				};

				radius = radius || 1;
				tube = tube || 0.4;
				tubularSegments = Math.floor( tubularSegments ) || 64;
				radialSegments = Math.floor( radialSegments ) || 8;
				p = p || 2;
				q = q || 3;

				// buffers

				var indices = [];
				var vertices = [];
				var normals = [];
				var uvs = [];

				// helper variables

				var vertex = new Vector3();
				var normal = new Vector3();

				var P1 = new Vector3();
				var P2 = new Vector3();

				var B = new Vector3();
				var T = new Vector3();
				var N = new Vector3();

				// generate vertices, normals and uvs

				for ( var i = 0; i <= tubularSegments; ++ i ) {

					// the radian "u" is used to calculate the position on the torus curve of the current tubular segement

					var u = i / tubularSegments * p * Math.PI * 2;

					// now we calculate two points. P1 is our current position on the curve, P2 is a little farther ahead.
					// these points are used to create a special "coordinate space", which is necessary to calculate the correct vertex positions

					calculatePositionOnCurve( u, p, q, radius, P1 );
					calculatePositionOnCurve( u + 0.01, p, q, radius, P2 );

					// calculate orthonormal basis

					T.subVectors( P2, P1 );
					N.addVectors( P2, P1 );
					B.crossVectors( T, N );
					N.crossVectors( B, T );

					// normalize B, N. T can be ignored, we don't use it

					B.normalize();
					N.normalize();

					for ( var j = 0; j <= radialSegments; ++ j ) {

						// now calculate the vertices. they are nothing more than an extrusion of the torus curve.
						// because we extrude a shape in the xy-plane, there is no need to calculate a z-value.

						var v = j / radialSegments * Math.PI * 2;
						var cx = - tube * Math.cos( v );
						var cy = tube * Math.sin( v );

						// now calculate the final vertex position.
						// first we orient the extrusion with our basis vectos, then we add it to the current position on the curve

						vertex.x = P1.x + ( cx * N.x + cy * B.x );
						vertex.y = P1.y + ( cx * N.y + cy * B.y );
						vertex.z = P1.z + ( cx * N.z + cy * B.z );

						vertices.push( vertex.x, vertex.y, vertex.z );

						// normal (P1 is always the center/origin of the extrusion, thus we can use it to calculate the normal)

						normal.subVectors( vertex, P1 ).normalize();

						normals.push( normal.x, normal.y, normal.z );

						// uv

						uvs.push( i / tubularSegments );
						uvs.push( j / radialSegments );

					}

				}

				// generate indices

				for ( var j$1 = 1; j$1 <= tubularSegments; j$1 ++ ) {

					for ( var i$1 = 1; i$1 <= radialSegments; i$1 ++ ) {

						// indices

						var a = ( radialSegments + 1 ) * ( j$1 - 1 ) + ( i$1 - 1 );
						var b = ( radialSegments + 1 ) * j$1 + ( i$1 - 1 );
						var c = ( radialSegments + 1 ) * j$1 + i$1;
						var d = ( radialSegments + 1 ) * ( j$1 - 1 ) + i$1;

						// faces

						indices.push( a, b, d );
						indices.push( b, c, d );

					}

				}

				// build geometry

				this.setIndex( indices );
				this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
				this.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
				this.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

				// this function calculates the current position on the torus curve

				function calculatePositionOnCurve( u, p, q, radius, position ) {

					var cu = Math.cos( u );
					var su = Math.sin( u );
					var quOverP = q / p * u;
					var cs = Math.cos( quOverP );

					position.x = radius * ( 2 + cs ) * 0.5 * cu;
					position.y = radius * ( 2 + cs ) * su * 0.5;
					position.z = radius * Math.sin( quOverP ) * 0.5;

				}

			}

			TorusKnotBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
			TorusKnotBufferGeometry.prototype.constructor = TorusKnotBufferGeometry;

		// TorusGeometry

			function TorusGeometry( radius, tube, radialSegments, tubularSegments, arc ) {

				Geometry.call(this);
				this.type = 'TorusGeometry';

				this.parameters = {
					radius: radius,
					tube: tube,
					radialSegments: radialSegments,
					tubularSegments: tubularSegments,
					arc: arc
				};

				this.fromBufferGeometry( new TorusBufferGeometry( radius, tube, radialSegments, tubularSegments, arc ) );
				this.mergeVertices();

			}

			TorusGeometry.prototype = Object.create( Geometry.prototype );
			TorusGeometry.prototype.constructor = TorusGeometry;


		// TorusBufferGeometry

			function TorusBufferGeometry( radius, tube, radialSegments, tubularSegments, arc ) {

				BufferGeometry.call(this);
				this.type = 'TorusBufferGeometry';

				this.parameters = {
					radius: radius,
					tube: tube,
					radialSegments: radialSegments,
					tubularSegments: tubularSegments,
					arc: arc
				};

				radius = radius || 1;
				tube = tube || 0.4;
				radialSegments = Math.floor( radialSegments ) || 8;
				tubularSegments = Math.floor( tubularSegments ) || 6;
				arc = arc || Math.PI * 2;

				// buffers

				var indices = [];
				var vertices = [];
				var normals = [];
				var uvs = [];

				// helper variables

				var center = new Vector3();
				var vertex = new Vector3();
				var normal = new Vector3();

				// generate vertices, normals and uvs

				for ( var j = 0; j <= radialSegments; j ++ ) {

					for ( var i = 0; i <= tubularSegments; i ++ ) {

						var u = i / tubularSegments * arc;
						var v = j / radialSegments * Math.PI * 2;

						// vertex

						vertex.x = ( radius + tube * Math.cos( v ) ) * Math.cos( u );
						vertex.y = ( radius + tube * Math.cos( v ) ) * Math.sin( u );
						vertex.z = tube * Math.sin( v );

						vertices.push( vertex.x, vertex.y, vertex.z );

						// normal

						center.x = radius * Math.cos( u );
						center.y = radius * Math.sin( u );
						normal.subVectors( vertex, center ).normalize();

						normals.push( normal.x, normal.y, normal.z );

						// uv

						uvs.push( i / tubularSegments );
						uvs.push( j / radialSegments );

					}

				}

				// generate indices

				for ( var j$1 = 1; j$1 <= radialSegments; j$1 ++ ) {

					for ( var i$1 = 1; i$1 <= tubularSegments; i$1 ++ ) {

						// indices

						var a = ( tubularSegments + 1 ) * j$1 + i$1 - 1;
						var b = ( tubularSegments + 1 ) * ( j$1 - 1 ) + i$1 - 1;
						var c = ( tubularSegments + 1 ) * ( j$1 - 1 ) + i$1;
						var d = ( tubularSegments + 1 ) * j$1 + i$1;

						// faces

						indices.push( a, b, d );
						indices.push( b, c, d );

					}

				}

				// build geometry

				this.setIndex( indices );
				this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
				this.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
				this.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

			}

			TorusBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
			TorusBufferGeometry.prototype.constructor = TorusBufferGeometry;

		/**
		 * Port from https://github.com/mapbox/earcut (v2.2.2)
		 */

		var Earcut = {

			triangulate: function ( data, holeIndices, dim ) {

				dim = dim || 2;

				var hasHoles = holeIndices && holeIndices.length;
				var outerLen = hasHoles ? holeIndices[ 0 ] * dim : data.length;
				var outerNode = linkedList( data, 0, outerLen, dim, true );
				var triangles = [];

				if ( ! outerNode || outerNode.next === outerNode.prev ) { return triangles; }

				var minX, minY, maxX, maxY, x, y, invSize;

				if ( hasHoles ) { outerNode = eliminateHoles( data, holeIndices, outerNode, dim ); }

				// if the shape is not too simple, we'll use z-order curve hash later; calculate polygon bbox
				if ( data.length > 80 * dim ) {

					minX = maxX = data[ 0 ];
					minY = maxY = data[ 1 ];

					for ( var i = dim; i < outerLen; i += dim ) {

						x = data[ i ];
						y = data[ i + 1 ];
						if ( x < minX ) { minX = x; }
						if ( y < minY ) { minY = y; }
						if ( x > maxX ) { maxX = x; }
						if ( y > maxY ) { maxY = y; }

					}

					// minX, minY and invSize are later used to transform coords into integers for z-order calculation
					invSize = Math.max( maxX - minX, maxY - minY );
					invSize = invSize !== 0 ? 1 / invSize : 0;

				}

				earcutLinked( outerNode, triangles, dim, minX, minY, invSize );

				return triangles;

			}

		};

		// create a circular doubly linked list from polygon points in the specified winding order
		function linkedList( data, start, end, dim, clockwise ) {

			var i, last;

			if ( clockwise === ( signedArea( data, start, end, dim ) > 0 ) ) {

				for ( i = start; i < end; i += dim ) { last = insertNode( i, data[ i ], data[ i + 1 ], last ); }

			} else {

				for ( i = end - dim; i >= start; i -= dim ) { last = insertNode( i, data[ i ], data[ i + 1 ], last ); }

			}

			if ( last && equals( last, last.next ) ) {

				removeNode( last );
				last = last.next;

			}

			return last;

		}

		// eliminate colinear or duplicate points
		function filterPoints( start, end ) {

			if ( ! start ) { return start; }
			if ( ! end ) { end = start; }

			var p = start,
				again;
			do {

				again = false;

				if ( ! p.steiner && ( equals( p, p.next ) || area( p.prev, p, p.next ) === 0 ) ) {

					removeNode( p );
					p = end = p.prev;
					if ( p === p.next ) { break; }
					again = true;

				} else {

					p = p.next;

				}

			} while ( again || p !== end );

			return end;

		}

		// main ear slicing loop which triangulates a polygon (given as a linked list)
		function earcutLinked( ear, triangles, dim, minX, minY, invSize, pass ) {

			if ( ! ear ) { return; }

			// interlink polygon nodes in z-order
			if ( ! pass && invSize ) { indexCurve( ear, minX, minY, invSize ); }

			var stop = ear,
				prev, next;

			// iterate through ears, slicing them one by one
			while ( ear.prev !== ear.next ) {

				prev = ear.prev;
				next = ear.next;

				if ( invSize ? isEarHashed( ear, minX, minY, invSize ) : isEar( ear ) ) {

					// cut off the triangle
					triangles.push( prev.i / dim );
					triangles.push( ear.i / dim );
					triangles.push( next.i / dim );

					removeNode( ear );

					// skipping the next vertex leads to less sliver triangles
					ear = next.next;
					stop = next.next;

					continue;

				}

				ear = next;

				// if we looped through the whole remaining polygon and can't find any more ears
				if ( ear === stop ) {

					// try filtering points and slicing again
					if ( ! pass ) {

						earcutLinked( filterPoints( ear ), triangles, dim, minX, minY, invSize, 1 );

						// if this didn't work, try curing all small self-intersections locally

					} else if ( pass === 1 ) {

						ear = cureLocalIntersections( filterPoints( ear ), triangles, dim );
						earcutLinked( ear, triangles, dim, minX, minY, invSize, 2 );

						// as a last resort, try splitting the remaining polygon into two

					} else if ( pass === 2 ) {

						splitEarcut( ear, triangles, dim, minX, minY, invSize );

					}

					break;

				}

			}

		}

		// check whether a polygon node forms a valid ear with adjacent nodes
		function isEar( ear ) {

			var a = ear.prev,
				b = ear,
				c = ear.next;

			if ( area( a, b, c ) >= 0 ) { return false; } // reflex, can't be an ear

			// now make sure we don't have other points inside the potential ear
			var p = ear.next.next;

			while ( p !== ear.prev ) {

				if ( pointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y ) &&
					area( p.prev, p, p.next ) >= 0 ) { return false; }
				p = p.next;

			}

			return true;

		}

		function isEarHashed( ear, minX, minY, invSize ) {

			var a = ear.prev,
				b = ear,
				c = ear.next;

			if ( area( a, b, c ) >= 0 ) { return false; } // reflex, can't be an ear

			// triangle bbox; min & max are calculated like this for speed
			var minTX = a.x < b.x ? ( a.x < c.x ? a.x : c.x ) : ( b.x < c.x ? b.x : c.x ),
				minTY = a.y < b.y ? ( a.y < c.y ? a.y : c.y ) : ( b.y < c.y ? b.y : c.y ),
				maxTX = a.x > b.x ? ( a.x > c.x ? a.x : c.x ) : ( b.x > c.x ? b.x : c.x ),
				maxTY = a.y > b.y ? ( a.y > c.y ? a.y : c.y ) : ( b.y > c.y ? b.y : c.y );

			// z-order range for the current triangle bbox;
			var minZ = zOrder( minTX, minTY, minX, minY, invSize ),
				maxZ = zOrder( maxTX, maxTY, minX, minY, invSize );

			var p = ear.prevZ,
				n = ear.nextZ;

			// look for points inside the triangle in both directions
			while ( p && p.z >= minZ && n && n.z <= maxZ ) {

				if ( p !== ear.prev && p !== ear.next &&
					pointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y ) &&
					area( p.prev, p, p.next ) >= 0 ) { return false; }
				p = p.prevZ;

				if ( n !== ear.prev && n !== ear.next &&
					pointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, n.x, n.y ) &&
					area( n.prev, n, n.next ) >= 0 ) { return false; }
				n = n.nextZ;

			}

			// look for remaining points in decreasing z-order
			while ( p && p.z >= minZ ) {

				if ( p !== ear.prev && p !== ear.next &&
					pointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y ) &&
					area( p.prev, p, p.next ) >= 0 ) { return false; }
				p = p.prevZ;

			}

			// look for remaining points in increasing z-order
			while ( n && n.z <= maxZ ) {

				if ( n !== ear.prev && n !== ear.next &&
					pointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, n.x, n.y ) &&
					area( n.prev, n, n.next ) >= 0 ) { return false; }
				n = n.nextZ;

			}

			return true;

		}

		// go through all polygon nodes and cure small local self-intersections
		function cureLocalIntersections( start, triangles, dim ) {

			var p = start;
			do {

				var a = p.prev,
					b = p.next.next;

				if ( ! equals( a, b ) && intersects( a, p, p.next, b ) && locallyInside( a, b ) && locallyInside( b, a ) ) {

					triangles.push( a.i / dim );
					triangles.push( p.i / dim );
					triangles.push( b.i / dim );

					// remove two nodes involved
					removeNode( p );
					removeNode( p.next );

					p = start = b;

				}

				p = p.next;

			} while ( p !== start );

			return filterPoints( p );

		}

		// try splitting polygon into two and triangulate them independently
		function splitEarcut( start, triangles, dim, minX, minY, invSize ) {

			// look for a valid diagonal that divides the polygon into two
			var a = start;
			do {

				var b = a.next.next;
				while ( b !== a.prev ) {

					if ( a.i !== b.i && isValidDiagonal( a, b ) ) {

						// split the polygon in two by the diagonal
						var c = splitPolygon( a, b );

						// filter colinear points around the cuts
						a = filterPoints( a, a.next );
						c = filterPoints( c, c.next );

						// run earcut on each half
						earcutLinked( a, triangles, dim, minX, minY, invSize );
						earcutLinked( c, triangles, dim, minX, minY, invSize );
						return;

					}

					b = b.next;

				}

				a = a.next;

			} while ( a !== start );

		}

		// link every hole into the outer loop, producing a single-ring polygon without holes
		function eliminateHoles( data, holeIndices, outerNode, dim ) {

			var queue = [];
			var i, len, start, end, list;

			for ( i = 0, len = holeIndices.length; i < len; i ++ ) {

				start = holeIndices[ i ] * dim;
				end = i < len - 1 ? holeIndices[ i + 1 ] * dim : data.length;
				list = linkedList( data, start, end, dim, false );
				if ( list === list.next ) { list.steiner = true; }
				queue.push( getLeftmost( list ) );

			}

			queue.sort( compareX );

			// process holes from left to right
			for ( i = 0; i < queue.length; i ++ ) {

				eliminateHole( queue[ i ], outerNode );
				outerNode = filterPoints( outerNode, outerNode.next );

			}

			return outerNode;

		}

		function compareX( a, b ) {

			return a.x - b.x;

		}

		// find a bridge between vertices that connects hole with an outer ring and and link it
		function eliminateHole( hole, outerNode ) {

			outerNode = findHoleBridge( hole, outerNode );
			if ( outerNode ) {

				var b = splitPolygon( outerNode, hole );

				// filter collinear points around the cuts
				filterPoints( outerNode, outerNode.next );
				filterPoints( b, b.next );

			}

		}

		// David Eberly's algorithm for finding a bridge between hole and outer polygon
		function findHoleBridge( hole, outerNode ) {

			var p = outerNode;
			var hx = hole.x;
			var hy = hole.y;
			var qx = - Infinity, m;

			// find a segment intersected by a ray from the hole's leftmost point to the left;
			// segment's endpoint with lesser x will be potential connection point
			do {

				if ( hy <= p.y && hy >= p.next.y && p.next.y !== p.y ) {

					var x = p.x + ( hy - p.y ) * ( p.next.x - p.x ) / ( p.next.y - p.y );
					if ( x <= hx && x > qx ) {

						qx = x;
						if ( x === hx ) {

							if ( hy === p.y ) { return p; }
							if ( hy === p.next.y ) { return p.next; }

						}

						m = p.x < p.next.x ? p : p.next;

					}

				}

				p = p.next;

			} while ( p !== outerNode );

			if ( ! m ) { return null; }

			if ( hx === qx ) { return m; } // hole touches outer segment; pick leftmost endpoint

			// look for points inside the triangle of hole point, segment intersection and endpoint;
			// if there are no points found, we have a valid connection;
			// otherwise choose the point of the minimum angle with the ray as connection point

			var stop = m,
				mx = m.x,
				my = m.y;
			var tanMin = Infinity, tan;

			p = m;

			do {

				if ( hx >= p.x && p.x >= mx && hx !== p.x &&
						pointInTriangle( hy < my ? hx : qx, hy, mx, my, hy < my ? qx : hx, hy, p.x, p.y ) ) {

					tan = Math.abs( hy - p.y ) / ( hx - p.x ); // tangential

					if ( locallyInside( p, hole ) && ( tan < tanMin || ( tan === tanMin && ( p.x > m.x || ( p.x === m.x && sectorContainsSector( m, p ) ) ) ) ) ) {

						m = p;
						tanMin = tan;

					}

				}

				p = p.next;

			} while ( p !== stop );

			return m;

		}

		// whether sector in vertex m contains sector in vertex p in the same coordinates
		function sectorContainsSector( m, p ) {

			return area( m.prev, m, p.prev ) < 0 && area( p.next, m, m.next ) < 0;

		}

		// interlink polygon nodes in z-order
		function indexCurve( start, minX, minY, invSize ) {

			var p = start;
			do {

				if ( p.z === null ) { p.z = zOrder( p.x, p.y, minX, minY, invSize ); }
				p.prevZ = p.prev;
				p.nextZ = p.next;
				p = p.next;

			} while ( p !== start );

			p.prevZ.nextZ = null;
			p.prevZ = null;

			sortLinked( p );

		}

		// Simon Tatham's linked list merge sort algorithm
		// http://www.chiark.greenend.org.uk/~sgtatham/algorithms/listsort.html
		function sortLinked( list ) {

			var i, p, q, e, tail, numMerges, pSize, qSize,
				inSize = 1;

			do {

				p = list;
				list = null;
				tail = null;
				numMerges = 0;

				while ( p ) {

					numMerges ++;
					q = p;
					pSize = 0;
					for ( i = 0; i < inSize; i ++ ) {

						pSize ++;
						q = q.nextZ;
						if ( ! q ) { break; }

					}

					qSize = inSize;

					while ( pSize > 0 || ( qSize > 0 && q ) ) {

						if ( pSize !== 0 && ( qSize === 0 || ! q || p.z <= q.z ) ) {

							e = p;
							p = p.nextZ;
							pSize --;

						} else {

							e = q;
							q = q.nextZ;
							qSize --;

						}

						if ( tail ) { tail.nextZ = e; }
						else { list = e; }

						e.prevZ = tail;
						tail = e;

					}

					p = q;

				}

				tail.nextZ = null;
				inSize *= 2;

			} while ( numMerges > 1 );

			return list;

		}

		// z-order of a point given coords and inverse of the longer side of data bbox
		function zOrder( x, y, minX, minY, invSize ) {

			// coords are transformed into non-negative 15-bit integer range
			x = 32767 * ( x - minX ) * invSize;
			y = 32767 * ( y - minY ) * invSize;

			x = ( x | ( x << 8 ) ) & 0x00FF00FF;
			x = ( x | ( x << 4 ) ) & 0x0F0F0F0F;
			x = ( x | ( x << 2 ) ) & 0x33333333;
			x = ( x | ( x << 1 ) ) & 0x55555555;

			y = ( y | ( y << 8 ) ) & 0x00FF00FF;
			y = ( y | ( y << 4 ) ) & 0x0F0F0F0F;
			y = ( y | ( y << 2 ) ) & 0x33333333;
			y = ( y | ( y << 1 ) ) & 0x55555555;

			return x | ( y << 1 );

		}

		// find the leftmost node of a polygon ring
		function getLeftmost( start ) {

			var p = start,
				leftmost = start;
			do {

				if ( p.x < leftmost.x || ( p.x === leftmost.x && p.y < leftmost.y ) ) { leftmost = p; }
				p = p.next;

			} while ( p !== start );

			return leftmost;

		}

		// check if a point lies within a convex triangle
		function pointInTriangle( ax, ay, bx, by, cx, cy, px, py ) {

			return ( cx - px ) * ( ay - py ) - ( ax - px ) * ( cy - py ) >= 0 &&
					( ax - px ) * ( by - py ) - ( bx - px ) * ( ay - py ) >= 0 &&
					( bx - px ) * ( cy - py ) - ( cx - px ) * ( by - py ) >= 0;

		}

		// check if a diagonal between two polygon nodes is valid (lies in polygon interior)
		function isValidDiagonal( a, b ) {

			return a.next.i !== b.i && a.prev.i !== b.i && ! intersectsPolygon( a, b ) && // dones't intersect other edges
				( locallyInside( a, b ) && locallyInside( b, a ) && middleInside( a, b ) && // locally visible
				( area( a.prev, a, b.prev ) || area( a, b.prev, b ) ) || // does not create opposite-facing sectors
				equals( a, b ) && area( a.prev, a, a.next ) > 0 && area( b.prev, b, b.next ) > 0 ); // special zero-length case

		}

		// signed area of a triangle
		function area( p, q, r ) {

			return ( q.y - p.y ) * ( r.x - q.x ) - ( q.x - p.x ) * ( r.y - q.y );

		}

		// check if two points are equal
		function equals( p1, p2 ) {

			return p1.x === p2.x && p1.y === p2.y;

		}

		// check if two segments intersect
		function intersects( p1, q1, p2, q2 ) {

			var o1 = sign( area( p1, q1, p2 ) );
			var o2 = sign( area( p1, q1, q2 ) );
			var o3 = sign( area( p2, q2, p1 ) );
			var o4 = sign( area( p2, q2, q1 ) );

			if ( o1 !== o2 && o3 !== o4 ) { return true; } // general case

			if ( o1 === 0 && onSegment( p1, p2, q1 ) ) { return true; } // p1, q1 and p2 are collinear and p2 lies on p1q1
			if ( o2 === 0 && onSegment( p1, q2, q1 ) ) { return true; } // p1, q1 and q2 are collinear and q2 lies on p1q1
			if ( o3 === 0 && onSegment( p2, p1, q2 ) ) { return true; } // p2, q2 and p1 are collinear and p1 lies on p2q2
			if ( o4 === 0 && onSegment( p2, q1, q2 ) ) { return true; } // p2, q2 and q1 are collinear and q1 lies on p2q2

			return false;

		}

		// for collinear points p, q, r, check if point q lies on segment pr
		function onSegment( p, q, r ) {

			return q.x <= Math.max( p.x, r.x ) && q.x >= Math.min( p.x, r.x ) && q.y <= Math.max( p.y, r.y ) && q.y >= Math.min( p.y, r.y );

		}

		function sign( num ) {

			return num > 0 ? 1 : num < 0 ? - 1 : 0;

		}

		// check if a polygon diagonal intersects any polygon segments
		function intersectsPolygon( a, b ) {

			var p = a;
			do {

				if ( p.i !== a.i && p.next.i !== a.i && p.i !== b.i && p.next.i !== b.i &&
						intersects( p, p.next, a, b ) ) { return true; }
				p = p.next;

			} while ( p !== a );

			return false;

		}

		// check if a polygon diagonal is locally inside the polygon
		function locallyInside( a, b ) {

			return area( a.prev, a, a.next ) < 0 ?
				area( a, b, a.next ) >= 0 && area( a, a.prev, b ) >= 0 :
				area( a, b, a.prev ) < 0 || area( a, a.next, b ) < 0;

		}

		// check if the middle point of a polygon diagonal is inside the polygon
		function middleInside( a, b ) {

			var p = a,
				inside = false;
			var px = ( a.x + b.x ) / 2,
				py = ( a.y + b.y ) / 2;
			do {

				if ( ( ( p.y > py ) !== ( p.next.y > py ) ) && p.next.y !== p.y &&
						( px < ( p.next.x - p.x ) * ( py - p.y ) / ( p.next.y - p.y ) + p.x ) )
					{ inside = ! inside; }
				p = p.next;

			} while ( p !== a );

			return inside;

		}

		// link two polygon vertices with a bridge; if the vertices belong to the same ring, it splits polygon into two;
		// if one belongs to the outer ring and another to a hole, it merges it into a single ring
		function splitPolygon( a, b ) {

			var a2 = new Node( a.i, a.x, a.y ),
				b2 = new Node( b.i, b.x, b.y ),
				an = a.next,
				bp = b.prev;

			a.next = b;
			b.prev = a;

			a2.next = an;
			an.prev = a2;

			b2.next = a2;
			a2.prev = b2;

			bp.next = b2;
			b2.prev = bp;

			return b2;

		}

		// create a node and optionally link it with previous one (in a circular doubly linked list)
		function insertNode( i, x, y, last ) {

			var p = new Node( i, x, y );

			if ( ! last ) {

				p.prev = p;
				p.next = p;

			} else {

				p.next = last.next;
				p.prev = last;
				last.next.prev = p;
				last.next = p;

			}

			return p;

		}

		function removeNode( p ) {

			p.next.prev = p.prev;
			p.prev.next = p.next;

			if ( p.prevZ ) { p.prevZ.nextZ = p.nextZ; }
			if ( p.nextZ ) { p.nextZ.prevZ = p.prevZ; }

		}

		function Node( i, x, y ) {

			// vertex index in coordinates array
			this.i = i;

			// vertex coordinates
			this.x = x;
			this.y = y;

			// previous and next vertex nodes in a polygon ring
			this.prev = null;
			this.next = null;

			// z-order curve value
			this.z = null;

			// previous and next nodes in z-order
			this.prevZ = null;
			this.nextZ = null;

			// indicates whether this is a steiner point
			this.steiner = false;

		}

		function signedArea( data, start, end, dim ) {

			var sum = 0;
			for ( var i = start, j = end - dim; i < end; i += dim ) {

				sum += ( data[ j ] - data[ i ] ) * ( data[ i + 1 ] + data[ j + 1 ] );
				j = i;

			}

			return sum;

		}

		var ShapeUtils = {

			// calculate area of the contour polygon

			area: function ( contour ) {

				var n = contour.length;
				var a = 0.0;

				for ( var p = n - 1, q = 0; q < n; p = q ++ ) {

					a += contour[ p ].x * contour[ q ].y - contour[ q ].x * contour[ p ].y;

				}

				return a * 0.5;

			},

			isClockWise: function ( pts ) {

				return ShapeUtils.area( pts ) < 0;

			},

			triangulateShape: function ( contour, holes ) {

				var vertices = []; // flat array of vertices like [ x0,y0, x1,y1, x2,y2, ... ]
				var holeIndices = []; // array of hole indices
				var faces = []; // final array of vertex indices like [ [ a,b,d ], [ b,c,d ] ]

				removeDupEndPts( contour );
				addContour( vertices, contour );

				//

				var holeIndex = contour.length;

				holes.forEach( removeDupEndPts );

				for ( var i = 0; i < holes.length; i ++ ) {

					holeIndices.push( holeIndex );
					holeIndex += holes[ i ].length;
					addContour( vertices, holes[ i ] );

				}

				//

				var triangles = Earcut.triangulate( vertices, holeIndices );

				//

				for ( var i$1 = 0; i$1 < triangles.length; i$1 += 3 ) {

					faces.push( triangles.slice( i$1, i$1 + 3 ) );

				}

				return faces;

			}

		};

		function removeDupEndPts( points ) {

			var l = points.length;

			if ( l > 2 && points[ l - 1 ].equals( points[ 0 ] ) ) {

				points.pop();

			}

		}

		function addContour( vertices, contour ) {

			for ( var i = 0; i < contour.length; i ++ ) {

				vertices.push( contour[ i ].x );
				vertices.push( contour[ i ].y );

			}

		}

		/**
		 * Creates extruded geometry from a path shape.
		 *
		 * parameters = {
		 *
		 *  curveSegments: <int>, // number of points on the curves
		 *  steps: <int>, // number of points for z-side extrusions / used for subdividing segments of extrude spline too
		 *  depth: <float>, // Depth to extrude the shape
		 *
		 *  bevelEnabled: <bool>, // turn on bevel
		 *  bevelThickness: <float>, // how deep into the original shape bevel goes
		 *  bevelSize: <float>, // how far from shape outline (including bevelOffset) is bevel
		 *  bevelOffset: <float>, // how far from shape outline does bevel start
		 *  bevelSegments: <int>, // number of bevel layers
		 *
		 *  extrudePath: <THREE.Curve> // curve to extrude shape along
		 *
		 *  UVGenerator: <Object> // object that provides UV generator functions
		 *
		 * }
		 */

		// ExtrudeGeometry

			function ExtrudeGeometry( shapes, options ) {

				Geometry.call(this);

				this.type = 'ExtrudeGeometry';

				this.parameters = {
					shapes: shapes,
					options: options
				};

				this.fromBufferGeometry( new ExtrudeBufferGeometry( shapes, options ) );
				this.mergeVertices();

			}

			ExtrudeGeometry.prototype = Object.create( Geometry.prototype );
			ExtrudeGeometry.prototype.constructor = ExtrudeGeometry;

			ExtrudeGeometry.prototype.toJSON = function toJSON$1 () {

				var data = Geometry.prototype.toJSON.call(this);

				var shapes = this.parameters.shapes;
				var options = this.parameters.options;

				return toJSON( shapes, options, data );

			};


		// ExtrudeBufferGeometry

			function ExtrudeBufferGeometry( shapes, options ) {

				BufferGeometry.call(this);

				this.type = 'ExtrudeBufferGeometry';

				this.parameters = {
					shapes: shapes,
					options: options
				};

				shapes = Array.isArray( shapes ) ? shapes : [ shapes ];

				var scope = this;

				var verticesArray = [];
				var uvArray = [];

				for ( var i = 0, l = shapes.length; i < l; i ++ ) {

					var shape = shapes[ i ];
					addShape( shape );

				}

				// build geometry

				this.setAttribute( 'position', new Float32BufferAttribute( verticesArray, 3 ) );
				this.setAttribute( 'uv', new Float32BufferAttribute( uvArray, 2 ) );

				this.computeVertexNormals();

				// functions

				function addShape( shape ) {

					var placeholder = [];

					// options

					var curveSegments = options.curveSegments !== undefined ? options.curveSegments : 12;
					var steps = options.steps !== undefined ? options.steps : 1;
					var depth = options.depth !== undefined ? options.depth : 100;

					var bevelEnabled = options.bevelEnabled !== undefined ? options.bevelEnabled : true;
					var bevelThickness = options.bevelThickness !== undefined ? options.bevelThickness : 6;
					var bevelSize = options.bevelSize !== undefined ? options.bevelSize : bevelThickness - 2;
					var bevelOffset = options.bevelOffset !== undefined ? options.bevelOffset : 0;
					var bevelSegments = options.bevelSegments !== undefined ? options.bevelSegments : 3;

					var extrudePath = options.extrudePath;

					var uvgen = options.UVGenerator !== undefined ? options.UVGenerator : WorldUVGenerator;

					// deprecated options

					if ( options.amount !== undefined ) {

						console.warn( 'THREE.ExtrudeBufferGeometry: amount has been renamed to depth.' );
						depth = options.amount;

					}

					//

					var extrudePts, extrudeByPath = false;
					var splineTube, binormal, normal, position2;

					if ( extrudePath ) {

						extrudePts = extrudePath.getSpacedPoints( steps );

						extrudeByPath = true;
						bevelEnabled = false; // bevels not supported for path extrusion

						// SETUP TNB variables

						// TODO1 - have a .isClosed in spline?

						splineTube = extrudePath.computeFrenetFrames( steps, false );

						// console.log(splineTube, 'splineTube', splineTube.normals.length, 'steps', steps, 'extrudePts', extrudePts.length);

						binormal = new Vector3();
						normal = new Vector3();
						position2 = new Vector3();

					}

					// Safeguards if bevels are not enabled

					if ( ! bevelEnabled ) {

						bevelSegments = 0;
						bevelThickness = 0;
						bevelSize = 0;
						bevelOffset = 0;

					}

					// Variables initialization

					var shapePoints = shape.extractPoints( curveSegments );

					var vertices = shapePoints.shape;
					var holes = shapePoints.holes;

					var reverse = ! ShapeUtils.isClockWise( vertices );

					if ( reverse ) {

						vertices = vertices.reverse();

						// Maybe we should also check if holes are in the opposite direction, just to be safe ...

						for ( var h = 0, hl = holes.length; h < hl; h ++ ) {

							var ahole = holes[ h ];

							if ( ShapeUtils.isClockWise( ahole ) ) {

								holes[ h ] = ahole.reverse();

							}

						}

					}


					var faces = ShapeUtils.triangulateShape( vertices, holes );

					/* Vertices */

					var contour = vertices; // vertices has all points but contour has only points of circumference

					for ( var h$1 = 0, hl$1 = holes.length; h$1 < hl$1; h$1 ++ ) {

						var ahole$1 = holes[ h$1 ];

						vertices = vertices.concat( ahole$1 );

					}


					function scalePt2( pt, vec, size ) {

						if ( ! vec ) { console.error( "THREE.ExtrudeGeometry: vec does not exist" ); }

						return vec.clone().multiplyScalar( size ).add( pt );

					}

					var vlen = vertices.length, flen = faces.length;


					// Find directions for point movement


					function getBevelVec( inPt, inPrev, inNext ) {

						// computes for inPt the corresponding point inPt' on a new contour
						//   shifted by 1 unit (length of normalized vector) to the left
						// if we walk along contour clockwise, this new contour is outside the old one
						//
						// inPt' is the intersection of the two lines parallel to the two
						//  adjacent edges of inPt at a distance of 1 unit on the left side.

						var v_trans_x, v_trans_y, shrink_by; // resulting translation vector for inPt

						// good reading for geometry algorithms (here: line-line intersection)
						// http://geomalgorithms.com/a05-_intersect-1.html

						var v_prev_x = inPt.x - inPrev.x,
							v_prev_y = inPt.y - inPrev.y;
						var v_next_x = inNext.x - inPt.x,
							v_next_y = inNext.y - inPt.y;

						var v_prev_lensq = ( v_prev_x * v_prev_x + v_prev_y * v_prev_y );

						// check for collinear edges
						var collinear0 = ( v_prev_x * v_next_y - v_prev_y * v_next_x );

						if ( Math.abs( collinear0 ) > Number.EPSILON ) {

							// not collinear

							// length of vectors for normalizing

							var v_prev_len = Math.sqrt( v_prev_lensq );
							var v_next_len = Math.sqrt( v_next_x * v_next_x + v_next_y * v_next_y );

							// shift adjacent points by unit vectors to the left

							var ptPrevShift_x = ( inPrev.x - v_prev_y / v_prev_len );
							var ptPrevShift_y = ( inPrev.y + v_prev_x / v_prev_len );

							var ptNextShift_x = ( inNext.x - v_next_y / v_next_len );
							var ptNextShift_y = ( inNext.y + v_next_x / v_next_len );

							// scaling factor for v_prev to intersection point

							var sf = ( ( ptNextShift_x - ptPrevShift_x ) * v_next_y -
									( ptNextShift_y - ptPrevShift_y ) * v_next_x ) /
								( v_prev_x * v_next_y - v_prev_y * v_next_x );

							// vector from inPt to intersection point

							v_trans_x = ( ptPrevShift_x + v_prev_x * sf - inPt.x );
							v_trans_y = ( ptPrevShift_y + v_prev_y * sf - inPt.y );

							// Don't normalize!, otherwise sharp corners become ugly
							//  but prevent crazy spikes
							var v_trans_lensq = ( v_trans_x * v_trans_x + v_trans_y * v_trans_y );
							if ( v_trans_lensq <= 2 ) {

								return new Vector2( v_trans_x, v_trans_y );

							} else {

								shrink_by = Math.sqrt( v_trans_lensq / 2 );

							}

						} else {

							// handle special case of collinear edges

							var direction_eq = false; // assumes: opposite

							if ( v_prev_x > Number.EPSILON ) {

								if ( v_next_x > Number.EPSILON ) {

									direction_eq = true;

								}

							} else {

								if ( v_prev_x < - Number.EPSILON ) {

									if ( v_next_x < - Number.EPSILON ) {

										direction_eq = true;

									}

								} else {

									if ( Math.sign( v_prev_y ) === Math.sign( v_next_y ) ) {

										direction_eq = true;

									}

								}

							}

							if ( direction_eq ) {

								// console.log("Warning: lines are a straight sequence");
								v_trans_x = - v_prev_y;
								v_trans_y = v_prev_x;
								shrink_by = Math.sqrt( v_prev_lensq );

							} else {

								// console.log("Warning: lines are a straight spike");
								v_trans_x = v_prev_x;
								v_trans_y = v_prev_y;
								shrink_by = Math.sqrt( v_prev_lensq / 2 );

							}

						}

						return new Vector2( v_trans_x / shrink_by, v_trans_y / shrink_by );

					}


					var contourMovements = [];

					for ( var i = 0, il = contour.length, j = il - 1, k = i + 1; i < il; i ++, j ++, k ++ ) {

						if ( j === il ) { j = 0; }
						if ( k === il ) { k = 0; }

						//  (j)---(i)---(k)
						// console.log('i,j,k', i, j , k)

						contourMovements[ i ] = getBevelVec( contour[ i ], contour[ j ], contour[ k ] );

					}

					var holesMovements = [];
					var oneHoleMovements, verticesMovements = contourMovements.concat();

					for ( var h$2 = 0, hl$2 = holes.length; h$2 < hl$2; h$2 ++ ) {

						var ahole$2 = holes[ h$2 ];

						oneHoleMovements = [];

						for ( var i$1 = 0, il$1 = ahole$2.length, j$1 = il$1 - 1, k$1 = i$1 + 1; i$1 < il$1; i$1 ++, j$1 ++, k$1 ++ ) {

							if ( j$1 === il$1 ) { j$1 = 0; }
							if ( k$1 === il$1 ) { k$1 = 0; }

							//  (j)---(i)---(k)
							oneHoleMovements[ i$1 ] = getBevelVec( ahole$2[ i$1 ], ahole$2[ j$1 ], ahole$2[ k$1 ] );

						}

						holesMovements.push( oneHoleMovements );
						verticesMovements = verticesMovements.concat( oneHoleMovements );

					}


					// Loop bevelSegments, 1 for the front, 1 for the back

					for ( var b = 0; b < bevelSegments; b ++ ) {

						//for ( b = bevelSegments; b > 0; b -- ) {

						var t = b / bevelSegments;
						var z = bevelThickness * Math.cos( t * Math.PI / 2 );
						var bs$1 = bevelSize * Math.sin( t * Math.PI / 2 ) + bevelOffset;

						// contract shape

						for ( var i$2 = 0, il$2 = contour.length; i$2 < il$2; i$2 ++ ) {

							var vert = scalePt2( contour[ i$2 ], contourMovements[ i$2 ], bs$1 );

							v( vert.x, vert.y, - z );

						}

						// expand holes

						for ( var h$3 = 0, hl$3 = holes.length; h$3 < hl$3; h$3 ++ ) {

							var ahole$3 = holes[ h$3 ];
							oneHoleMovements = holesMovements[ h$3 ];

							for ( var i$3 = 0, il$3 = ahole$3.length; i$3 < il$3; i$3 ++ ) {

								var vert$1 = scalePt2( ahole$3[ i$3 ], oneHoleMovements[ i$3 ], bs$1 );

								v( vert$1.x, vert$1.y, - z );

							}

						}

					}

					var bs = bevelSize + bevelOffset;

					// Back facing vertices

					for ( var i$4 = 0; i$4 < vlen; i$4 ++ ) {

						var vert$2 = bevelEnabled ? scalePt2( vertices[ i$4 ], verticesMovements[ i$4 ], bs ) : vertices[ i$4 ];

						if ( ! extrudeByPath ) {

							v( vert$2.x, vert$2.y, 0 );

						} else {

							// v( vert.x, vert.y + extrudePts[ 0 ].y, extrudePts[ 0 ].x );

							normal.copy( splineTube.normals[ 0 ] ).multiplyScalar( vert$2.x );
							binormal.copy( splineTube.binormals[ 0 ] ).multiplyScalar( vert$2.y );

							position2.copy( extrudePts[ 0 ] ).add( normal ).add( binormal );

							v( position2.x, position2.y, position2.z );

						}

					}

					// Add stepped vertices...
					// Including front facing vertices

					for ( var s = 1; s <= steps; s ++ ) {

						for ( var i$5 = 0; i$5 < vlen; i$5 ++ ) {

							var vert$3 = bevelEnabled ? scalePt2( vertices[ i$5 ], verticesMovements[ i$5 ], bs ) : vertices[ i$5 ];

							if ( ! extrudeByPath ) {

								v( vert$3.x, vert$3.y, depth / steps * s );

							} else {

								// v( vert.x, vert.y + extrudePts[ s - 1 ].y, extrudePts[ s - 1 ].x );

								normal.copy( splineTube.normals[ s ] ).multiplyScalar( vert$3.x );
								binormal.copy( splineTube.binormals[ s ] ).multiplyScalar( vert$3.y );

								position2.copy( extrudePts[ s ] ).add( normal ).add( binormal );

								v( position2.x, position2.y, position2.z );

							}

						}

					}


					// Add bevel segments planes

					//for ( b = 1; b <= bevelSegments; b ++ ) {
					for ( var b$1 = bevelSegments - 1; b$1 >= 0; b$1 -- ) {

						var t$1 = b$1 / bevelSegments;
						var z$1 = bevelThickness * Math.cos( t$1 * Math.PI / 2 );
						var bs$2 = bevelSize * Math.sin( t$1 * Math.PI / 2 ) + bevelOffset;

						// contract shape

						for ( var i$6 = 0, il$4 = contour.length; i$6 < il$4; i$6 ++ ) {

							var vert$4 = scalePt2( contour[ i$6 ], contourMovements[ i$6 ], bs$2 );
							v( vert$4.x, vert$4.y, depth + z$1 );

						}

						// expand holes

						for ( var h$4 = 0, hl$4 = holes.length; h$4 < hl$4; h$4 ++ ) {

							var ahole$4 = holes[ h$4 ];
							oneHoleMovements = holesMovements[ h$4 ];

							for ( var i$7 = 0, il$5 = ahole$4.length; i$7 < il$5; i$7 ++ ) {

								var vert$5 = scalePt2( ahole$4[ i$7 ], oneHoleMovements[ i$7 ], bs$2 );

								if ( ! extrudeByPath ) {

									v( vert$5.x, vert$5.y, depth + z$1 );

								} else {

									v( vert$5.x, vert$5.y + extrudePts[ steps - 1 ].y, extrudePts[ steps - 1 ].x + z$1 );

								}

							}

						}

					}

					/* Faces */

					// Top and bottom faces

					buildLidFaces();

					// Sides faces

					buildSideFaces();


					/////  Internal functions

					function buildLidFaces() {

						var start = verticesArray.length / 3;

						if ( bevelEnabled ) {

							var layer = 0; // steps + 1
							var offset = vlen * layer;

							// Bottom faces

							for ( var i = 0; i < flen; i ++ ) {

								var face = faces[ i ];
								f3( face[ 2 ] + offset, face[ 1 ] + offset, face[ 0 ] + offset );

							}

							layer = steps + bevelSegments * 2;
							offset = vlen * layer;

							// Top faces

							for ( var i$1 = 0; i$1 < flen; i$1 ++ ) {

								var face$1 = faces[ i$1 ];
								f3( face$1[ 0 ] + offset, face$1[ 1 ] + offset, face$1[ 2 ] + offset );

							}

						} else {

							// Bottom faces

							for ( var i$2 = 0; i$2 < flen; i$2 ++ ) {

								var face$2 = faces[ i$2 ];
								f3( face$2[ 2 ], face$2[ 1 ], face$2[ 0 ] );

							}

							// Top faces

							for ( var i$3 = 0; i$3 < flen; i$3 ++ ) {

								var face$3 = faces[ i$3 ];
								f3( face$3[ 0 ] + vlen * steps, face$3[ 1 ] + vlen * steps, face$3[ 2 ] + vlen * steps );

							}

						}

						scope.addGroup( start, verticesArray.length / 3 - start, 0 );

					}

					// Create faces for the z-sides of the shape

					function buildSideFaces() {

						var start = verticesArray.length / 3;
						var layeroffset = 0;
						sidewalls( contour, layeroffset );
						layeroffset += contour.length;

						for ( var h = 0, hl = holes.length; h < hl; h ++ ) {

							var ahole = holes[ h ];
							sidewalls( ahole, layeroffset );

							//, true
							layeroffset += ahole.length;

						}


						scope.addGroup( start, verticesArray.length / 3 - start, 1 );


					}

					function sidewalls( contour, layeroffset ) {

						var i = contour.length;

						while ( -- i >= 0 ) {

							var j = i;
							var k = i - 1;
							if ( k < 0 ) { k = contour.length - 1; }

							//console.log('b', i,j, i-1, k,vertices.length);

							for ( var s = 0, sl = ( steps + bevelSegments * 2 ); s < sl; s ++ ) {

								var slen1 = vlen * s;
								var slen2 = vlen * ( s + 1 );

								var a = layeroffset + j + slen1,
									b = layeroffset + k + slen1,
									c = layeroffset + k + slen2,
									d = layeroffset + j + slen2;

								f4( a, b, c, d );

							}

						}

					}

					function v( x, y, z ) {

						placeholder.push( x );
						placeholder.push( y );
						placeholder.push( z );

					}


					function f3( a, b, c ) {

						addVertex( a );
						addVertex( b );
						addVertex( c );

						var nextIndex = verticesArray.length / 3;
						var uvs = uvgen.generateTopUV( scope, verticesArray, nextIndex - 3, nextIndex - 2, nextIndex - 1 );

						addUV( uvs[ 0 ] );
						addUV( uvs[ 1 ] );
						addUV( uvs[ 2 ] );

					}

					function f4( a, b, c, d ) {

						addVertex( a );
						addVertex( b );
						addVertex( d );

						addVertex( b );
						addVertex( c );
						addVertex( d );


						var nextIndex = verticesArray.length / 3;
						var uvs = uvgen.generateSideWallUV( scope, verticesArray, nextIndex - 6, nextIndex - 3, nextIndex - 2, nextIndex - 1 );

						addUV( uvs[ 0 ] );
						addUV( uvs[ 1 ] );
						addUV( uvs[ 3 ] );

						addUV( uvs[ 1 ] );
						addUV( uvs[ 2 ] );
						addUV( uvs[ 3 ] );

					}

					function addVertex( index ) {

						verticesArray.push( placeholder[ index * 3 + 0 ] );
						verticesArray.push( placeholder[ index * 3 + 1 ] );
						verticesArray.push( placeholder[ index * 3 + 2 ] );

					}


					function addUV( vector2 ) {

						uvArray.push( vector2.x );
						uvArray.push( vector2.y );

					}

				}

			}

			ExtrudeBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
			ExtrudeBufferGeometry.prototype.constructor = ExtrudeBufferGeometry;

			ExtrudeBufferGeometry.prototype.toJSON = function toJSON$2 () {

				var data = BufferGeometry.prototype.toJSON.call( this );

				var shapes = this.parameters.shapes;
				var options = this.parameters.options;

				return toJSON( shapes, options, data );

			};

		var WorldUVGenerator = {

			generateTopUV: function ( geometry, vertices, indexA, indexB, indexC ) {

				var a_x = vertices[ indexA * 3 ];
				var a_y = vertices[ indexA * 3 + 1 ];
				var b_x = vertices[ indexB * 3 ];
				var b_y = vertices[ indexB * 3 + 1 ];
				var c_x = vertices[ indexC * 3 ];
				var c_y = vertices[ indexC * 3 + 1 ];

				return [
					new Vector2( a_x, a_y ),
					new Vector2( b_x, b_y ),
					new Vector2( c_x, c_y )
				];

			},

			generateSideWallUV: function ( geometry, vertices, indexA, indexB, indexC, indexD ) {

				var a_x = vertices[ indexA * 3 ];
				var a_y = vertices[ indexA * 3 + 1 ];
				var a_z = vertices[ indexA * 3 + 2 ];
				var b_x = vertices[ indexB * 3 ];
				var b_y = vertices[ indexB * 3 + 1 ];
				var b_z = vertices[ indexB * 3 + 2 ];
				var c_x = vertices[ indexC * 3 ];
				var c_y = vertices[ indexC * 3 + 1 ];
				var c_z = vertices[ indexC * 3 + 2 ];
				var d_x = vertices[ indexD * 3 ];
				var d_y = vertices[ indexD * 3 + 1 ];
				var d_z = vertices[ indexD * 3 + 2 ];

				if ( Math.abs( a_y - b_y ) < 0.01 ) {

					return [
						new Vector2( a_x, 1 - a_z ),
						new Vector2( b_x, 1 - b_z ),
						new Vector2( c_x, 1 - c_z ),
						new Vector2( d_x, 1 - d_z )
					];

				} else {

					return [
						new Vector2( a_y, 1 - a_z ),
						new Vector2( b_y, 1 - b_z ),
						new Vector2( c_y, 1 - c_z ),
						new Vector2( d_y, 1 - d_z )
					];

				}

			}
		};

		function toJSON( shapes, options, data ) {

			data.shapes = [];

			if ( Array.isArray( shapes ) ) {

				for ( var i = 0, l = shapes.length; i < l; i ++ ) {

					var shape = shapes[ i ];

					data.shapes.push( shape.uuid );

				}

			} else {

				data.shapes.push( shapes.uuid );

			}

			if ( options.extrudePath !== undefined ) { data.options.extrudePath = options.extrudePath.toJSON(); }

			return data;

		}

		/**
		 * Text = 3D Text
		 *
		 * parameters = {
		 *  font: <THREE.Font>, // font
		 *
		 *  size: <float>, // size of the text
		 *  height: <float>, // thickness to extrude text
		 *  curveSegments: <int>, // number of points on the curves
		 *
		 *  bevelEnabled: <bool>, // turn on bevel
		 *  bevelThickness: <float>, // how deep into text bevel goes
		 *  bevelSize: <float>, // how far from text outline (including bevelOffset) is bevel
		 *  bevelOffset: <float> // how far from text outline does bevel start
		 * }
		 */

		// TextGeometry

			function TextGeometry( text, parameters ) {

				Geometry.call(this);
				this.type = 'TextGeometry';

				this.parameters = {
					text: text,
					parameters: parameters
				};

				this.fromBufferGeometry( new TextBufferGeometry( text, parameters ) );
				this.mergeVertices();

			}

			TextGeometry.prototype = Object.create( Geometry.prototype );
			TextGeometry.prototype.constructor = TextGeometry;


		// TextBufferGeometry

			function TextBufferGeometry( text, parameters ) {

				parameters = parameters || {};

				var font = parameters.font;

				if ( ! ( font && font.isFont ) ) {

					console.error( 'THREE.TextGeometry: font parameter is not an instance of THREE.Font.' );
					return new Geometry();

				}

				var shapes = font.generateShapes( text, parameters.size );

				// translate parameters to ExtrudeGeometry API

				parameters.depth = parameters.height !== undefined ? parameters.height : 50;

				// defaults

				if ( parameters.bevelThickness === undefined ) { parameters.bevelThickness = 10; }
				if ( parameters.bevelSize === undefined ) { parameters.bevelSize = 8; }
				if ( parameters.bevelEnabled === undefined ) { parameters.bevelEnabled = false; }

				ExtrudeBufferGeometry.call( this, shapes, parameters );

				this.type = 'TextBufferGeometry';

			}

			TextBufferGeometry.prototype = Object.create( ExtrudeBufferGeometry.prototype );
			TextBufferGeometry.prototype.constructor = TextBufferGeometry;

		// SphereGeometry

			function SphereGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) {

				Geometry.call(this);
				this.type = 'SphereGeometry';

				this.parameters = {
					radius: radius,
					widthSegments: widthSegments,
					heightSegments: heightSegments,
					phiStart: phiStart,
					phiLength: phiLength,
					thetaStart: thetaStart,
					thetaLength: thetaLength
				};

				this.fromBufferGeometry( new SphereBufferGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) );
				this.mergeVertices();

			}

			SphereGeometry.prototype = Object.create( Geometry.prototype );
			SphereGeometry.prototype.constructor = SphereGeometry;

		// SphereBufferGeometry

			function SphereBufferGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) {

				BufferGeometry.call(this);
				this.type = 'SphereBufferGeometry';

				this.parameters = {
					radius: radius,
					widthSegments: widthSegments,
					heightSegments: heightSegments,
					phiStart: phiStart,
					phiLength: phiLength,
					thetaStart: thetaStart,
					thetaLength: thetaLength
				};

				radius = radius || 1;

				widthSegments = Math.max( 3, Math.floor( widthSegments ) || 8 );
				heightSegments = Math.max( 2, Math.floor( heightSegments ) || 6 );

				phiStart = phiStart !== undefined ? phiStart : 0;
				phiLength = phiLength !== undefined ? phiLength : Math.PI * 2;

				thetaStart = thetaStart !== undefined ? thetaStart : 0;
				thetaLength = thetaLength !== undefined ? thetaLength : Math.PI;

				var thetaEnd = Math.min( thetaStart + thetaLength, Math.PI );

				var index = 0;
				var grid = [];

				var vertex = new Vector3();
				var normal = new Vector3();

				// buffers

				var indices = [];
				var vertices = [];
				var normals = [];
				var uvs = [];

				// generate vertices, normals and uvs

				for ( var iy = 0; iy <= heightSegments; iy ++ ) {

					var verticesRow = [];

					var v = iy / heightSegments;

					// special case for the poles

					var uOffset = 0;

					if ( iy == 0 && thetaStart == 0 ) {

						uOffset = 0.5 / widthSegments;

					} else if ( iy == heightSegments && thetaEnd == Math.PI ) {

						uOffset = - 0.5 / widthSegments;

					}

					for ( var ix = 0; ix <= widthSegments; ix ++ ) {

						var u = ix / widthSegments;

						// vertex

						vertex.x = - radius * Math.cos( phiStart + u * phiLength ) * Math.sin( thetaStart + v * thetaLength );
						vertex.y = radius * Math.cos( thetaStart + v * thetaLength );
						vertex.z = radius * Math.sin( phiStart + u * phiLength ) * Math.sin( thetaStart + v * thetaLength );

						vertices.push( vertex.x, vertex.y, vertex.z );

						// normal

						normal.copy( vertex ).normalize();
						normals.push( normal.x, normal.y, normal.z );

						// uv

						uvs.push( u + uOffset, 1 - v );

						verticesRow.push( index ++ );

					}

					grid.push( verticesRow );

				}

				// indices

				for ( var iy$1 = 0; iy$1 < heightSegments; iy$1 ++ ) {

					for ( var ix$1 = 0; ix$1 < widthSegments; ix$1 ++ ) {

						var a = grid[ iy$1 ][ ix$1 + 1 ];
						var b = grid[ iy$1 ][ ix$1 ];
						var c = grid[ iy$1 + 1 ][ ix$1 ];
						var d = grid[ iy$1 + 1 ][ ix$1 + 1 ];

						if ( iy$1 !== 0 || thetaStart > 0 ) { indices.push( a, b, d ); }
						if ( iy$1 !== heightSegments - 1 || thetaEnd < Math.PI ) { indices.push( b, c, d ); }

					}

				}

				// build geometry

				this.setIndex( indices );
				this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
				this.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
				this.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

			}

			SphereBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
			SphereBufferGeometry.prototype.constructor = SphereBufferGeometry;

		// RingGeometry

			function RingGeometry( innerRadius, outerRadius, thetaSegments, phiSegments, thetaStart, thetaLength ) {

				Geometry.call(this);

				this.type = 'RingGeometry';

				this.parameters = {
					innerRadius: innerRadius,
					outerRadius: outerRadius,
					thetaSegments: thetaSegments,
					phiSegments: phiSegments,
					thetaStart: thetaStart,
					thetaLength: thetaLength
				};

				this.fromBufferGeometry( new RingBufferGeometry( innerRadius, outerRadius, thetaSegments, phiSegments, thetaStart, thetaLength ) );
				this.mergeVertices();

			}

			RingGeometry.prototype = Object.create( Geometry.prototype );
			RingGeometry.prototype.constructor = RingGeometry;

		// RingBufferGeometry

			function RingBufferGeometry( innerRadius, outerRadius, thetaSegments, phiSegments, thetaStart, thetaLength ) {

				BufferGeometry.call(this);

				this.type = 'RingBufferGeometry';

				this.parameters = {
					innerRadius: innerRadius,
					outerRadius: outerRadius,
					thetaSegments: thetaSegments,
					phiSegments: phiSegments,
					thetaStart: thetaStart,
					thetaLength: thetaLength
				};

				innerRadius = innerRadius || 0.5;
				outerRadius = outerRadius || 1;

				thetaStart = thetaStart !== undefined ? thetaStart : 0;
				thetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;

				thetaSegments = thetaSegments !== undefined ? Math.max( 3, thetaSegments ) : 8;
				phiSegments = phiSegments !== undefined ? Math.max( 1, phiSegments ) : 1;

				// buffers

				var indices = [];
				var vertices = [];
				var normals = [];
				var uvs = [];

				// some helper variables

				var radius = innerRadius;
				var radiusStep = ( ( outerRadius - innerRadius ) / phiSegments );
				var vertex = new Vector3();
				var uv = new Vector2();

				// generate vertices, normals and uvs

				for ( var j = 0; j <= phiSegments; j ++ ) {

					for ( var i = 0; i <= thetaSegments; i ++ ) {

						// values are generate from the inside of the ring to the outside

						var segment = thetaStart + i / thetaSegments * thetaLength;

						// vertex

						vertex.x = radius * Math.cos( segment );
						vertex.y = radius * Math.sin( segment );

						vertices.push( vertex.x, vertex.y, vertex.z );

						// normal

						normals.push( 0, 0, 1 );

						// uv

						uv.x = ( vertex.x / outerRadius + 1 ) / 2;
						uv.y = ( vertex.y / outerRadius + 1 ) / 2;

						uvs.push( uv.x, uv.y );

					}

					// increase the radius for next row of vertices

					radius += radiusStep;

				}

				// indices

				for ( var j$1 = 0; j$1 < phiSegments; j$1 ++ ) {

					var thetaSegmentLevel = j$1 * ( thetaSegments + 1 );

					for ( var i$1 = 0; i$1 < thetaSegments; i$1 ++ ) {

						var segment$1 = i$1 + thetaSegmentLevel;

						var a = segment$1;
						var b = segment$1 + thetaSegments + 1;
						var c = segment$1 + thetaSegments + 2;
						var d = segment$1 + 1;

						// faces

						indices.push( a, b, d );
						indices.push( b, c, d );

					}

				}

				// build geometry

				this.setIndex( indices );
				this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
				this.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
				this.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

			}

			RingBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
			RingBufferGeometry.prototype.constructor = RingBufferGeometry;

		// LatheGeometry

			function LatheGeometry( points, segments, phiStart, phiLength ) {

				Geometry.call(this);

				this.type = 'LatheGeometry';

				this.parameters = {
					points: points,
					segments: segments,
					phiStart: phiStart,
					phiLength: phiLength
				};

				this.fromBufferGeometry( new LatheBufferGeometry( points, segments, phiStart, phiLength ) );
				this.mergeVertices();

			}

			LatheGeometry.prototype = Object.create( Geometry.prototype );
			LatheGeometry.prototype.constructor = LatheGeometry;

		// LatheBufferGeometry

			function LatheBufferGeometry( points, segments, phiStart, phiLength ) {

				BufferGeometry.call(this);

				this.type = 'LatheBufferGeometry';

				this.parameters = {
					points: points,
					segments: segments,
					phiStart: phiStart,
					phiLength: phiLength
				};

				segments = Math.floor( segments ) || 12;
				phiStart = phiStart || 0;
				phiLength = phiLength || Math.PI * 2;

				// clamp phiLength so it's in range of [ 0, 2PI ]

				phiLength = MathUtils.clamp( phiLength, 0, Math.PI * 2 );


				// buffers

				var indices = [];
				var vertices = [];
				var uvs = [];

				// helper variables

				var inverseSegments = 1.0 / segments;
				var vertex = new Vector3();
				var uv = new Vector2();

				// generate vertices and uvs

				for ( var i = 0; i <= segments; i ++ ) {

					var phi = phiStart + i * inverseSegments * phiLength;

					var sin = Math.sin( phi );
					var cos = Math.cos( phi );

					for ( var j = 0; j <= ( points.length - 1 ); j ++ ) {

						// vertex

						vertex.x = points[ j ].x * sin;
						vertex.y = points[ j ].y;
						vertex.z = points[ j ].x * cos;

						vertices.push( vertex.x, vertex.y, vertex.z );

						// uv

						uv.x = i / segments;
						uv.y = j / ( points.length - 1 );

						uvs.push( uv.x, uv.y );


					}

				}

				// indices

				for ( var i$1 = 0; i$1 < segments; i$1 ++ ) {

					for ( var j$1 = 0; j$1 < ( points.length - 1 ); j$1 ++ ) {

						var base = j$1 + i$1 * points.length;

						var a = base;
						var b = base + points.length;
						var c = base + points.length + 1;
						var d = base + 1;

						// faces

						indices.push( a, b, d );
						indices.push( b, c, d );

					}

				}

				// build geometry

				this.setIndex( indices );
				this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
				this.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

				// generate normals

				this.computeVertexNormals();

				// if the geometry is closed, we need to average the normals along the seam.
				// because the corresponding vertices are identical (but still have different UVs).

				if ( phiLength === Math.PI * 2 ) {

					var normals = this.attributes.normal.array;
					var n1 = new Vector3();
					var n2 = new Vector3();
					var n = new Vector3();

					// this is the buffer offset for the last line of vertices

					var base$1 = segments * points.length * 3;

					for ( var i$2 = 0, j$2 = 0; i$2 < points.length; i$2 ++, j$2 += 3 ) {

						// select the normal of the vertex in the first line

						n1.x = normals[ j$2 + 0 ];
						n1.y = normals[ j$2 + 1 ];
						n1.z = normals[ j$2 + 2 ];

						// select the normal of the vertex in the last line

						n2.x = normals[ base$1 + j$2 + 0 ];
						n2.y = normals[ base$1 + j$2 + 1 ];
						n2.z = normals[ base$1 + j$2 + 2 ];

						// average normals

						n.addVectors( n1, n2 ).normalize();

						// assign the new values to both normals

						normals[ j$2 + 0 ] = normals[ base$1 + j$2 + 0 ] = n.x;
						normals[ j$2 + 1 ] = normals[ base$1 + j$2 + 1 ] = n.y;
						normals[ j$2 + 2 ] = normals[ base$1 + j$2 + 2 ] = n.z;

					}

				}

			}

			LatheBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
			LatheBufferGeometry.prototype.constructor = LatheBufferGeometry;

		// ShapeGeometry

			function ShapeGeometry( shapes, curveSegments ) {

				Geometry.call(this);
				this.type = 'ShapeGeometry';

				if ( typeof curveSegments === 'object' ) {

					console.warn( 'THREE.ShapeGeometry: Options parameter has been removed.' );

					curveSegments = curveSegments.curveSegments;

				}

				this.parameters = {
					shapes: shapes,
					curveSegments: curveSegments
				};

				this.fromBufferGeometry( new ShapeBufferGeometry( shapes, curveSegments ) );
				this.mergeVertices();

			}

			ShapeGeometry.prototype = Object.create( Geometry.prototype );
			ShapeGeometry.prototype.constructor = ShapeGeometry;

			ShapeGeometry.prototype.toJSON = function toJSON$1$1 () {

				var data = Geometry.prototype.toJSON.call( this );

				var shapes = this.parameters.shapes;

				return toJSON$1( shapes, data );

			};

		// ShapeBufferGeometry

			function ShapeBufferGeometry( shapes, curveSegments ) {

				BufferGeometry.call(this);
				this.type = 'ShapeBufferGeometry';

				this.parameters = {
					shapes: shapes,
					curveSegments: curveSegments
				};

				curveSegments = curveSegments || 12;

				// buffers

				var indices = [];
				var vertices = [];
				var normals = [];
				var uvs = [];

				// helper variables

				var groupStart = 0;
				var groupCount = 0;

				// allow single and array values for "shapes" parameter

				if ( Array.isArray( shapes ) === false ) {

					addShape( shapes );

				} else {

					for ( var i = 0; i < shapes.length; i ++ ) {

						addShape( shapes[ i ] );

						this.addGroup( groupStart, groupCount, i ); // enables MultiMaterial support

						groupStart += groupCount;
						groupCount = 0;

					}

				}

				// build geometry

				this.setIndex( indices );
				this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
				this.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
				this.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );


				// helper functions

				function addShape( shape ) {

					var indexOffset = vertices.length / 3;
					var points = shape.extractPoints( curveSegments );

					var shapeVertices = points.shape;
					var shapeHoles = points.holes;

					// check direction of vertices

					if ( ShapeUtils.isClockWise( shapeVertices ) === false ) {

						shapeVertices = shapeVertices.reverse();

					}

					for ( var i = 0, l = shapeHoles.length; i < l; i ++ ) {

						var shapeHole = shapeHoles[ i ];

						if ( ShapeUtils.isClockWise( shapeHole ) === true ) {

							shapeHoles[ i ] = shapeHole.reverse();

						}

					}

					var faces = ShapeUtils.triangulateShape( shapeVertices, shapeHoles );

					// join vertices of inner and outer paths to a single array

					for ( var i$1 = 0, l$1 = shapeHoles.length; i$1 < l$1; i$1 ++ ) {

						var shapeHole$1 = shapeHoles[ i$1 ];
						shapeVertices = shapeVertices.concat( shapeHole$1 );

					}

					// vertices, normals, uvs

					for ( var i$2 = 0, l$2 = shapeVertices.length; i$2 < l$2; i$2 ++ ) {

						var vertex = shapeVertices[ i$2 ];

						vertices.push( vertex.x, vertex.y, 0 );
						normals.push( 0, 0, 1 );
						uvs.push( vertex.x, vertex.y ); // world uvs

					}

					// incides

					for ( var i$3 = 0, l$3 = faces.length; i$3 < l$3; i$3 ++ ) {

						var face = faces[ i$3 ];

						var a = face[ 0 ] + indexOffset;
						var b = face[ 1 ] + indexOffset;
						var c = face[ 2 ] + indexOffset;

						indices.push( a, b, c );
						groupCount += 3;

					}

				}

			}

			ShapeBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
			ShapeBufferGeometry.prototype.constructor = ShapeBufferGeometry;

			ShapeBufferGeometry.prototype.toJSON = function toJSON$2 () {

				var data = BufferGeometry.prototype.toJSON.call( this );

				var shapes = this.parameters.shapes;

				return toJSON$1( shapes, data );

			};

		//

		function toJSON$1( shapes, data ) {

			data.shapes = [];

			if ( Array.isArray( shapes ) ) {

				for ( var i = 0, l = shapes.length; i < l; i ++ ) {

					var shape = shapes[ i ];

					data.shapes.push( shape.uuid );

				}

			} else {

				data.shapes.push( shapes.uuid );

			}

			return data;

		}

		function EdgesGeometry( geometry, thresholdAngle ) {

				BufferGeometry.call(this);

				this.type = 'EdgesGeometry';

				this.parameters = {
					thresholdAngle: thresholdAngle
				};

				thresholdAngle = ( thresholdAngle !== undefined ) ? thresholdAngle : 1;

				// buffer

				var vertices = [];

				// helper variables

				var thresholdDot = Math.cos( MathUtils.DEG2RAD * thresholdAngle );
				var edge = [ 0, 0 ], edges = {};
				var edge1, edge2, key;
				var keys = [ 'a', 'b', 'c' ];

				// prepare source geometry

				var geometry2;

				if ( geometry.isBufferGeometry ) {

					geometry2 = new Geometry();
					geometry2.fromBufferGeometry( geometry );

				} else {

					geometry2 = geometry.clone();

				}

				geometry2.mergeVertices();
				geometry2.computeFaceNormals();

				var sourceVertices = geometry2.vertices;
				var faces = geometry2.faces;

				// now create a data structure where each entry represents an edge with its adjoining faces

				for ( var i = 0, l = faces.length; i < l; i ++ ) {

					var face = faces[ i ];

					for ( var j = 0; j < 3; j ++ ) {

						edge1 = face[ keys[ j ] ];
						edge2 = face[ keys[ ( j + 1 ) % 3 ] ];
						edge[ 0 ] = Math.min( edge1, edge2 );
						edge[ 1 ] = Math.max( edge1, edge2 );

						key = edge[ 0 ] + ',' + edge[ 1 ];

						if ( edges[ key ] === undefined ) {

							edges[ key ] = { index1: edge[ 0 ], index2: edge[ 1 ], face1: i, face2: undefined };

						} else {

							edges[ key ].face2 = i;

						}

					}

				}

				// generate vertices

				for ( key in edges ) {

					var e = edges[ key ];

					// an edge is only rendered if the angle (in degrees) between the face normals of the adjoining faces exceeds this value. default = 1 degree.

					if ( e.face2 === undefined || faces[ e.face1 ].normal.dot( faces[ e.face2 ].normal ) <= thresholdDot ) {

						var vertex = sourceVertices[ e.index1 ];
						vertices.push( vertex.x, vertex.y, vertex.z );

						vertex = sourceVertices[ e.index2 ];
						vertices.push( vertex.x, vertex.y, vertex.z );

					}

				}

				// build geometry

				this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );

			}

			EdgesGeometry.prototype = Object.create( BufferGeometry.prototype );
			EdgesGeometry.prototype.constructor = EdgesGeometry;

		// CylinderGeometry

			function CylinderGeometry( radiusTop, radiusBottom, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {

				Geometry.call(this);
				this.type = 'CylinderGeometry';

				this.parameters = {
					radiusTop: radiusTop,
					radiusBottom: radiusBottom,
					height: height,
					radialSegments: radialSegments,
					heightSegments: heightSegments,
					openEnded: openEnded,
					thetaStart: thetaStart,
					thetaLength: thetaLength
				};

				this.fromBufferGeometry( new CylinderBufferGeometry( radiusTop, radiusBottom, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) );
				this.mergeVertices();

			}

			CylinderGeometry.prototype = Object.create( Geometry.prototype );
			CylinderGeometry.prototype.constructor = CylinderGeometry;

		// CylinderBufferGeometry

			function CylinderBufferGeometry( radiusTop, radiusBottom, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {

				BufferGeometry.call(this);
				this.type = 'CylinderBufferGeometry';

				this.parameters = {
					radiusTop: radiusTop,
					radiusBottom: radiusBottom,
					height: height,
					radialSegments: radialSegments,
					heightSegments: heightSegments,
					openEnded: openEnded,
					thetaStart: thetaStart,
					thetaLength: thetaLength
				};

				var scope = this;

				radiusTop = radiusTop !== undefined ? radiusTop : 1;
				radiusBottom = radiusBottom !== undefined ? radiusBottom : 1;
				height = height || 1;

				radialSegments = Math.floor( radialSegments ) || 8;
				heightSegments = Math.floor( heightSegments ) || 1;

				openEnded = openEnded !== undefined ? openEnded : false;
				thetaStart = thetaStart !== undefined ? thetaStart : 0.0;
				thetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;

				// buffers

				var indices = [];
				var vertices = [];
				var normals = [];
				var uvs = [];

				// helper variables

				var index = 0;
				var indexArray = [];
				var halfHeight = height / 2;
				var groupStart = 0;

				// generate geometry

				generateTorso();

				if ( openEnded === false ) {

					if ( radiusTop > 0 ) { generateCap( true ); }
					if ( radiusBottom > 0 ) { generateCap( false ); }

				}

				// build geometry

				this.setIndex( indices );
				this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
				this.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
				this.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

				function generateTorso() {

					var normal = new Vector3();
					var vertex = new Vector3();

					var groupCount = 0;

					// this will be used to calculate the normal
					var slope = ( radiusBottom - radiusTop ) / height;

					// generate vertices, normals and uvs

					for ( var y = 0; y <= heightSegments; y ++ ) {

						var indexRow = [];

						var v = y / heightSegments;

						// calculate the radius of the current row

						var radius = v * ( radiusBottom - radiusTop ) + radiusTop;

						for ( var x = 0; x <= radialSegments; x ++ ) {

							var u = x / radialSegments;

							var theta = u * thetaLength + thetaStart;

							var sinTheta = Math.sin( theta );
							var cosTheta = Math.cos( theta );

							// vertex

							vertex.x = radius * sinTheta;
							vertex.y = - v * height + halfHeight;
							vertex.z = radius * cosTheta;
							vertices.push( vertex.x, vertex.y, vertex.z );

							// normal

							normal.set( sinTheta, slope, cosTheta ).normalize();
							normals.push( normal.x, normal.y, normal.z );

							// uv

							uvs.push( u, 1 - v );

							// save index of vertex in respective row

							indexRow.push( index ++ );

						}

						// now save vertices of the row in our index array

						indexArray.push( indexRow );

					}

					// generate indices

					for ( var x$1 = 0; x$1 < radialSegments; x$1 ++ ) {

						for ( var y$1 = 0; y$1 < heightSegments; y$1 ++ ) {

							// we use the index array to access the correct indices

							var a = indexArray[ y$1 ][ x$1 ];
							var b = indexArray[ y$1 + 1 ][ x$1 ];
							var c = indexArray[ y$1 + 1 ][ x$1 + 1 ];
							var d = indexArray[ y$1 ][ x$1 + 1 ];

							// faces

							indices.push( a, b, d );
							indices.push( b, c, d );

							// update group counter

							groupCount += 6;

						}

					}

					// add a group to the geometry. this will ensure multi material support

					scope.addGroup( groupStart, groupCount, 0 );

					// calculate new start value for groups

					groupStart += groupCount;

				}

				function generateCap( top ) {

					// save the index of the first center vertex
					var centerIndexStart = index;

					var uv = new Vector2();
					var vertex = new Vector3();

					var groupCount = 0;

					var radius = ( top === true ) ? radiusTop : radiusBottom;
					var sign = ( top === true ) ? 1 : - 1;

					// first we generate the center vertex data of the cap.
					// because the geometry needs one set of uvs per face,
					// we must generate a center vertex per face/segment

					for ( var x = 1; x <= radialSegments; x ++ ) {

						// vertex

						vertices.push( 0, halfHeight * sign, 0 );

						// normal

						normals.push( 0, sign, 0 );

						// uv

						uvs.push( 0.5, 0.5 );

						// increase index

						index ++;

					}

					// save the index of the last center vertex
					var centerIndexEnd = index;

					// now we generate the surrounding vertices, normals and uvs

					for ( var x$1 = 0; x$1 <= radialSegments; x$1 ++ ) {

						var u = x$1 / radialSegments;
						var theta = u * thetaLength + thetaStart;

						var cosTheta = Math.cos( theta );
						var sinTheta = Math.sin( theta );

						// vertex

						vertex.x = radius * sinTheta;
						vertex.y = halfHeight * sign;
						vertex.z = radius * cosTheta;
						vertices.push( vertex.x, vertex.y, vertex.z );

						// normal

						normals.push( 0, sign, 0 );

						// uv

						uv.x = ( cosTheta * 0.5 ) + 0.5;
						uv.y = ( sinTheta * 0.5 * sign ) + 0.5;
						uvs.push( uv.x, uv.y );

						// increase index

						index ++;

					}

					// generate indices

					for ( var x$2 = 0; x$2 < radialSegments; x$2 ++ ) {

						var c = centerIndexStart + x$2;
						var i = centerIndexEnd + x$2;

						if ( top === true ) {

							// face top

							indices.push( i, i + 1, c );

						} else {

							// face bottom

							indices.push( i + 1, i, c );

						}

						groupCount += 3;

					}

					// add a group to the geometry. this will ensure multi material support

					scope.addGroup( groupStart, groupCount, top === true ? 1 : 2 );

					// calculate new start value for groups

					groupStart += groupCount;

				}

			}

			CylinderBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
			CylinderBufferGeometry.prototype.constructor = CylinderBufferGeometry;

		// ConeGeometry

			function ConeGeometry( radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {

				CylinderGeometry.call( this, 0, radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength );
				this.type = 'ConeGeometry';

				this.parameters = {
					radius: radius,
					height: height,
					radialSegments: radialSegments,
					heightSegments: heightSegments,
					openEnded: openEnded,
					thetaStart: thetaStart,
					thetaLength: thetaLength
				};

			}

			ConeGeometry.prototype = Object.create( CylinderGeometry.prototype );
			ConeGeometry.prototype.constructor = ConeGeometry;

		// ConeBufferGeometry

			function ConeBufferGeometry( radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {

				CylinderBufferGeometry.call( this, 0, radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength );
				this.type = 'ConeBufferGeometry';

				this.parameters = {
					radius: radius,
					height: height,
					radialSegments: radialSegments,
					heightSegments: heightSegments,
					openEnded: openEnded,
					thetaStart: thetaStart,
					thetaLength: thetaLength
				};

			}

			ConeBufferGeometry.prototype = Object.create( CylinderBufferGeometry.prototype );
			ConeBufferGeometry.prototype.constructor = ConeBufferGeometry;

		// CircleGeometry

			function CircleGeometry( radius, segments, thetaStart, thetaLength ) {

				Geometry.call(this);
				this.type = 'CircleGeometry';

				this.parameters = {
					radius: radius,
					segments: segments,
					thetaStart: thetaStart,
					thetaLength: thetaLength
				};

				this.fromBufferGeometry( new CircleBufferGeometry( radius, segments, thetaStart, thetaLength ) );
				this.mergeVertices();

			}

			CircleGeometry.prototype = Object.create( Geometry.prototype );
			CircleGeometry.prototype.constructor = CircleGeometry;

		// CircleBufferGeometry

			function CircleBufferGeometry( radius, segments, thetaStart, thetaLength ) {

				BufferGeometry.call(this);

				this.type = 'CircleBufferGeometry';

				this.parameters = {
					radius: radius,
					segments: segments,
					thetaStart: thetaStart,
					thetaLength: thetaLength
				};

				radius = radius || 1;
				segments = segments !== undefined ? Math.max( 3, segments ) : 8;

				thetaStart = thetaStart !== undefined ? thetaStart : 0;
				thetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;

				// buffers

				var indices = [];
				var vertices = [];
				var normals = [];
				var uvs = [];

				// helper variables

				var vertex = new Vector3();
				var uv = new Vector2();

				// center point

				vertices.push( 0, 0, 0 );
				normals.push( 0, 0, 1 );
				uvs.push( 0.5, 0.5 );

				for ( var s = 0, i = 3; s <= segments; s ++, i += 3 ) {

					var segment = thetaStart + s / segments * thetaLength;

					// vertex

					vertex.x = radius * Math.cos( segment );
					vertex.y = radius * Math.sin( segment );

					vertices.push( vertex.x, vertex.y, vertex.z );

					// normal

					normals.push( 0, 0, 1 );

					// uvs

					uv.x = ( vertices[ i ] / radius + 1 ) / 2;
					uv.y = ( vertices[ i + 1 ] / radius + 1 ) / 2;

					uvs.push( uv.x, uv.y );

				}

				// indices

				for ( var i$1 = 1; i$1 <= segments; i$1 ++ ) {

					indices.push( i$1, i$1 + 1, 0 );

				}

				// build geometry

				this.setIndex( indices );
				this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
				this.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
				this.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

			}

			CircleBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
			CircleBufferGeometry.prototype.constructor = CircleBufferGeometry;

		var Geometries = /*#__PURE__*/Object.freeze({
			__proto__: null,
			WireframeGeometry: WireframeGeometry,
			ParametricGeometry: ParametricGeometry,
			ParametricBufferGeometry: ParametricBufferGeometry,
			TetrahedronGeometry: TetrahedronGeometry,
			TetrahedronBufferGeometry: TetrahedronBufferGeometry,
			OctahedronGeometry: OctahedronGeometry,
			OctahedronBufferGeometry: OctahedronBufferGeometry,
			IcosahedronGeometry: IcosahedronGeometry,
			IcosahedronBufferGeometry: IcosahedronBufferGeometry,
			DodecahedronGeometry: DodecahedronGeometry,
			DodecahedronBufferGeometry: DodecahedronBufferGeometry,
			PolyhedronGeometry: PolyhedronGeometry,
			PolyhedronBufferGeometry: PolyhedronBufferGeometry,
			TubeGeometry: TubeGeometry,
			TubeBufferGeometry: TubeBufferGeometry,
			TorusKnotGeometry: TorusKnotGeometry,
			TorusKnotBufferGeometry: TorusKnotBufferGeometry,
			TorusGeometry: TorusGeometry,
			TorusBufferGeometry: TorusBufferGeometry,
			TextGeometry: TextGeometry,
			TextBufferGeometry: TextBufferGeometry,
			SphereGeometry: SphereGeometry,
			SphereBufferGeometry: SphereBufferGeometry,
			RingGeometry: RingGeometry,
			RingBufferGeometry: RingBufferGeometry,
			PlaneGeometry: PlaneGeometry,
			PlaneBufferGeometry: PlaneBufferGeometry,
			LatheGeometry: LatheGeometry,
			LatheBufferGeometry: LatheBufferGeometry,
			ShapeGeometry: ShapeGeometry,
			ShapeBufferGeometry: ShapeBufferGeometry,
			ExtrudeGeometry: ExtrudeGeometry,
			ExtrudeBufferGeometry: ExtrudeBufferGeometry,
			EdgesGeometry: EdgesGeometry,
			ConeGeometry: ConeGeometry,
			ConeBufferGeometry: ConeBufferGeometry,
			CylinderGeometry: CylinderGeometry,
			CylinderBufferGeometry: CylinderBufferGeometry,
			CircleGeometry: CircleGeometry,
			CircleBufferGeometry: CircleBufferGeometry,
			BoxGeometry: BoxGeometry,
			BoxBufferGeometry: BoxBufferGeometry
		});

		/**
		 * parameters = {
		 *  color: <THREE.Color>
		 * }
		 */

		function ShadowMaterial( parameters ) {

			Material.call( this );

			this.type = 'ShadowMaterial';

			this.color = new Color( 0x000000 );
			this.transparent = true;

			this.setValues( parameters );

		}

		ShadowMaterial.prototype = Object.create( Material.prototype );
		ShadowMaterial.prototype.constructor = ShadowMaterial;

		ShadowMaterial.prototype.isShadowMaterial = true;

		ShadowMaterial.prototype.copy = function ( source ) {

			Material.prototype.copy.call( this, source );

			this.color.copy( source.color );

			return this;

		};

		function RawShaderMaterial( parameters ) {

			ShaderMaterial.call( this, parameters );

			this.type = 'RawShaderMaterial';

		}

		RawShaderMaterial.prototype = Object.create( ShaderMaterial.prototype );
		RawShaderMaterial.prototype.constructor = RawShaderMaterial;

		RawShaderMaterial.prototype.isRawShaderMaterial = true;

		/**
		 * parameters = {
		 *  color: <hex>,
		 *  roughness: <float>,
		 *  metalness: <float>,
		 *  opacity: <float>,
		 *
		 *  map: new THREE.Texture( <Image> ),
		 *
		 *  lightMap: new THREE.Texture( <Image> ),
		 *  lightMapIntensity: <float>
		 *
		 *  aoMap: new THREE.Texture( <Image> ),
		 *  aoMapIntensity: <float>
		 *
		 *  emissive: <hex>,
		 *  emissiveIntensity: <float>
		 *  emissiveMap: new THREE.Texture( <Image> ),
		 *
		 *  bumpMap: new THREE.Texture( <Image> ),
		 *  bumpScale: <float>,
		 *
		 *  normalMap: new THREE.Texture( <Image> ),
		 *  normalMapType: THREE.TangentSpaceNormalMap,
		 *  normalScale: <Vector2>,
		 *
		 *  displacementMap: new THREE.Texture( <Image> ),
		 *  displacementScale: <float>,
		 *  displacementBias: <float>,
		 *
		 *  roughnessMap: new THREE.Texture( <Image> ),
		 *
		 *  metalnessMap: new THREE.Texture( <Image> ),
		 *
		 *  alphaMap: new THREE.Texture( <Image> ),
		 *
		 *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),
		 *  envMapIntensity: <float>
		 *
		 *  refractionRatio: <float>,
		 *
		 *  wireframe: <boolean>,
		 *  wireframeLinewidth: <float>,
		 *
		 *  skinning: <bool>,
		 *  morphTargets: <bool>,
		 *  morphNormals: <bool>
		 * }
		 */

		function MeshStandardMaterial( parameters ) {

			Material.call( this );

			this.defines = { 'STANDARD': '' };

			this.type = 'MeshStandardMaterial';

			this.color = new Color( 0xffffff ); // diffuse
			this.roughness = 1.0;
			this.metalness = 0.0;

			this.map = null;

			this.lightMap = null;
			this.lightMapIntensity = 1.0;

			this.aoMap = null;
			this.aoMapIntensity = 1.0;

			this.emissive = new Color( 0x000000 );
			this.emissiveIntensity = 1.0;
			this.emissiveMap = null;

			this.bumpMap = null;
			this.bumpScale = 1;

			this.normalMap = null;
			this.normalMapType = TangentSpaceNormalMap;
			this.normalScale = new Vector2( 1, 1 );

			this.displacementMap = null;
			this.displacementScale = 1;
			this.displacementBias = 0;

			this.roughnessMap = null;

			this.metalnessMap = null;

			this.alphaMap = null;

			this.envMap = null;
			this.envMapIntensity = 1.0;

			this.refractionRatio = 0.98;

			this.wireframe = false;
			this.wireframeLinewidth = 1;
			this.wireframeLinecap = 'round';
			this.wireframeLinejoin = 'round';

			this.skinning = false;
			this.morphTargets = false;
			this.morphNormals = false;

			this.vertexTangents = false;

			this.setValues( parameters );

		}

		MeshStandardMaterial.prototype = Object.create( Material.prototype );
		MeshStandardMaterial.prototype.constructor = MeshStandardMaterial;

		MeshStandardMaterial.prototype.isMeshStandardMaterial = true;

		MeshStandardMaterial.prototype.copy = function ( source ) {

			Material.prototype.copy.call( this, source );

			this.defines = { 'STANDARD': '' };

			this.color.copy( source.color );
			this.roughness = source.roughness;
			this.metalness = source.metalness;

			this.map = source.map;

			this.lightMap = source.lightMap;
			this.lightMapIntensity = source.lightMapIntensity;

			this.aoMap = source.aoMap;
			this.aoMapIntensity = source.aoMapIntensity;

			this.emissive.copy( source.emissive );
			this.emissiveMap = source.emissiveMap;
			this.emissiveIntensity = source.emissiveIntensity;

			this.bumpMap = source.bumpMap;
			this.bumpScale = source.bumpScale;

			this.normalMap = source.normalMap;
			this.normalMapType = source.normalMapType;
			this.normalScale.copy( source.normalScale );

			this.displacementMap = source.displacementMap;
			this.displacementScale = source.displacementScale;
			this.displacementBias = source.displacementBias;

			this.roughnessMap = source.roughnessMap;

			this.metalnessMap = source.metalnessMap;

			this.alphaMap = source.alphaMap;

			this.envMap = source.envMap;
			this.envMapIntensity = source.envMapIntensity;

			this.refractionRatio = source.refractionRatio;

			this.wireframe = source.wireframe;
			this.wireframeLinewidth = source.wireframeLinewidth;
			this.wireframeLinecap = source.wireframeLinecap;
			this.wireframeLinejoin = source.wireframeLinejoin;

			this.skinning = source.skinning;
			this.morphTargets = source.morphTargets;
			this.morphNormals = source.morphNormals;

			this.vertexTangents = source.vertexTangents;

			return this;

		};

		/**
		 * parameters = {
		 *  clearcoat: <float>,
		 *  clearcoatMap: new THREE.Texture( <Image> ),
		 *  clearcoatRoughness: <float>,
		 *  clearcoatRoughnessMap: new THREE.Texture( <Image> ),
		 *  clearcoatNormalScale: <Vector2>,
		 *  clearcoatNormalMap: new THREE.Texture( <Image> ),
		 *
		 *  reflectivity: <float>,
		 *
		 *  sheen: <Color>,
		 *
		 *  transmission: <float>,
		 *  transmissionMap: new THREE.Texture( <Image> )
		 * }
		 */

		function MeshPhysicalMaterial( parameters ) {

			MeshStandardMaterial.call( this );

			this.defines = {

				'STANDARD': '',
				'PHYSICAL': ''

			};

			this.type = 'MeshPhysicalMaterial';

			this.clearcoat = 0.0;
			this.clearcoatMap = null;
			this.clearcoatRoughness = 0.0;
			this.clearcoatRoughnessMap = null;
			this.clearcoatNormalScale = new Vector2( 1, 1 );
			this.clearcoatNormalMap = null;

			this.reflectivity = 0.5; // maps to F0 = 0.04

			this.sheen = null; // null will disable sheen bsdf

			this.transmission = 0.0;
			this.transmissionMap = null;

			this.setValues( parameters );

		}

		MeshPhysicalMaterial.prototype = Object.create( MeshStandardMaterial.prototype );
		MeshPhysicalMaterial.prototype.constructor = MeshPhysicalMaterial;

		MeshPhysicalMaterial.prototype.isMeshPhysicalMaterial = true;

		MeshPhysicalMaterial.prototype.copy = function ( source ) {

			MeshStandardMaterial.prototype.copy.call( this, source );

			this.defines = {

				'STANDARD': '',
				'PHYSICAL': ''

			};

			this.clearcoat = source.clearcoat;
			this.clearcoatMap = source.clearcoatMap;
			this.clearcoatRoughness = source.clearcoatRoughness;
			this.clearcoatRoughnessMap = source.clearcoatRoughnessMap;
			this.clearcoatNormalMap = source.clearcoatNormalMap;
			this.clearcoatNormalScale.copy( source.clearcoatNormalScale );

			this.reflectivity = source.reflectivity;

			if ( source.sheen ) {

				this.sheen = ( this.sheen || new Color() ).copy( source.sheen );

			} else {

				this.sheen = null;

			}

			this.transmission = source.transmission;
			this.transmissionMap = source.transmissionMap;

			return this;

		};

		/**
		 * parameters = {
		 *  color: <hex>,
		 *  specular: <hex>,
		 *  shininess: <float>,
		 *  opacity: <float>,
		 *
		 *  map: new THREE.Texture( <Image> ),
		 *
		 *  lightMap: new THREE.Texture( <Image> ),
		 *  lightMapIntensity: <float>
		 *
		 *  aoMap: new THREE.Texture( <Image> ),
		 *  aoMapIntensity: <float>
		 *
		 *  emissive: <hex>,
		 *  emissiveIntensity: <float>
		 *  emissiveMap: new THREE.Texture( <Image> ),
		 *
		 *  bumpMap: new THREE.Texture( <Image> ),
		 *  bumpScale: <float>,
		 *
		 *  normalMap: new THREE.Texture( <Image> ),
		 *  normalMapType: THREE.TangentSpaceNormalMap,
		 *  normalScale: <Vector2>,
		 *
		 *  displacementMap: new THREE.Texture( <Image> ),
		 *  displacementScale: <float>,
		 *  displacementBias: <float>,
		 *
		 *  specularMap: new THREE.Texture( <Image> ),
		 *
		 *  alphaMap: new THREE.Texture( <Image> ),
		 *
		 *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),
		 *  combine: THREE.MultiplyOperation,
		 *  reflectivity: <float>,
		 *  refractionRatio: <float>,
		 *
		 *  wireframe: <boolean>,
		 *  wireframeLinewidth: <float>,
		 *
		 *  skinning: <bool>,
		 *  morphTargets: <bool>,
		 *  morphNormals: <bool>
		 * }
		 */

		function MeshPhongMaterial( parameters ) {

			Material.call( this );

			this.type = 'MeshPhongMaterial';

			this.color = new Color( 0xffffff ); // diffuse
			this.specular = new Color( 0x111111 );
			this.shininess = 30;

			this.map = null;

			this.lightMap = null;
			this.lightMapIntensity = 1.0;

			this.aoMap = null;
			this.aoMapIntensity = 1.0;

			this.emissive = new Color( 0x000000 );
			this.emissiveIntensity = 1.0;
			this.emissiveMap = null;

			this.bumpMap = null;
			this.bumpScale = 1;

			this.normalMap = null;
			this.normalMapType = TangentSpaceNormalMap;
			this.normalScale = new Vector2( 1, 1 );

			this.displacementMap = null;
			this.displacementScale = 1;
			this.displacementBias = 0;

			this.specularMap = null;

			this.alphaMap = null;

			this.envMap = null;
			this.combine = MultiplyOperation;
			this.reflectivity = 1;
			this.refractionRatio = 0.98;

			this.wireframe = false;
			this.wireframeLinewidth = 1;
			this.wireframeLinecap = 'round';
			this.wireframeLinejoin = 'round';

			this.skinning = false;
			this.morphTargets = false;
			this.morphNormals = false;

			this.setValues( parameters );

		}

		MeshPhongMaterial.prototype = Object.create( Material.prototype );
		MeshPhongMaterial.prototype.constructor = MeshPhongMaterial;

		MeshPhongMaterial.prototype.isMeshPhongMaterial = true;

		MeshPhongMaterial.prototype.copy = function ( source ) {

			Material.prototype.copy.call( this, source );

			this.color.copy( source.color );
			this.specular.copy( source.specular );
			this.shininess = source.shininess;

			this.map = source.map;

			this.lightMap = source.lightMap;
			this.lightMapIntensity = source.lightMapIntensity;

			this.aoMap = source.aoMap;
			this.aoMapIntensity = source.aoMapIntensity;

			this.emissive.copy( source.emissive );
			this.emissiveMap = source.emissiveMap;
			this.emissiveIntensity = source.emissiveIntensity;

			this.bumpMap = source.bumpMap;
			this.bumpScale = source.bumpScale;

			this.normalMap = source.normalMap;
			this.normalMapType = source.normalMapType;
			this.normalScale.copy( source.normalScale );

			this.displacementMap = source.displacementMap;
			this.displacementScale = source.displacementScale;
			this.displacementBias = source.displacementBias;

			this.specularMap = source.specularMap;

			this.alphaMap = source.alphaMap;

			this.envMap = source.envMap;
			this.combine = source.combine;
			this.reflectivity = source.reflectivity;
			this.refractionRatio = source.refractionRatio;

			this.wireframe = source.wireframe;
			this.wireframeLinewidth = source.wireframeLinewidth;
			this.wireframeLinecap = source.wireframeLinecap;
			this.wireframeLinejoin = source.wireframeLinejoin;

			this.skinning = source.skinning;
			this.morphTargets = source.morphTargets;
			this.morphNormals = source.morphNormals;

			return this;

		};

		/**
		 * parameters = {
		 *  color: <hex>,
		 *
		 *  map: new THREE.Texture( <Image> ),
		 *  gradientMap: new THREE.Texture( <Image> ),
		 *
		 *  lightMap: new THREE.Texture( <Image> ),
		 *  lightMapIntensity: <float>
		 *
		 *  aoMap: new THREE.Texture( <Image> ),
		 *  aoMapIntensity: <float>
		 *
		 *  emissive: <hex>,
		 *  emissiveIntensity: <float>
		 *  emissiveMap: new THREE.Texture( <Image> ),
		 *
		 *  bumpMap: new THREE.Texture( <Image> ),
		 *  bumpScale: <float>,
		 *
		 *  normalMap: new THREE.Texture( <Image> ),
		 *  normalMapType: THREE.TangentSpaceNormalMap,
		 *  normalScale: <Vector2>,
		 *
		 *  displacementMap: new THREE.Texture( <Image> ),
		 *  displacementScale: <float>,
		 *  displacementBias: <float>,
		 *
		 *  alphaMap: new THREE.Texture( <Image> ),
		 *
		 *  wireframe: <boolean>,
		 *  wireframeLinewidth: <float>,
		 *
		 *  skinning: <bool>,
		 *  morphTargets: <bool>,
		 *  morphNormals: <bool>
		 * }
		 */

		function MeshToonMaterial( parameters ) {

			Material.call( this );

			this.defines = { 'TOON': '' };

			this.type = 'MeshToonMaterial';

			this.color = new Color( 0xffffff );

			this.map = null;
			this.gradientMap = null;

			this.lightMap = null;
			this.lightMapIntensity = 1.0;

			this.aoMap = null;
			this.aoMapIntensity = 1.0;

			this.emissive = new Color( 0x000000 );
			this.emissiveIntensity = 1.0;
			this.emissiveMap = null;

			this.bumpMap = null;
			this.bumpScale = 1;

			this.normalMap = null;
			this.normalMapType = TangentSpaceNormalMap;
			this.normalScale = new Vector2( 1, 1 );

			this.displacementMap = null;
			this.displacementScale = 1;
			this.displacementBias = 0;

			this.alphaMap = null;

			this.wireframe = false;
			this.wireframeLinewidth = 1;
			this.wireframeLinecap = 'round';
			this.wireframeLinejoin = 'round';

			this.skinning = false;
			this.morphTargets = false;
			this.morphNormals = false;

			this.setValues( parameters );

		}

		MeshToonMaterial.prototype = Object.create( Material.prototype );
		MeshToonMaterial.prototype.constructor = MeshToonMaterial;

		MeshToonMaterial.prototype.isMeshToonMaterial = true;

		MeshToonMaterial.prototype.copy = function ( source ) {

			Material.prototype.copy.call( this, source );

			this.color.copy( source.color );

			this.map = source.map;
			this.gradientMap = source.gradientMap;

			this.lightMap = source.lightMap;
			this.lightMapIntensity = source.lightMapIntensity;

			this.aoMap = source.aoMap;
			this.aoMapIntensity = source.aoMapIntensity;

			this.emissive.copy( source.emissive );
			this.emissiveMap = source.emissiveMap;
			this.emissiveIntensity = source.emissiveIntensity;

			this.bumpMap = source.bumpMap;
			this.bumpScale = source.bumpScale;

			this.normalMap = source.normalMap;
			this.normalMapType = source.normalMapType;
			this.normalScale.copy( source.normalScale );

			this.displacementMap = source.displacementMap;
			this.displacementScale = source.displacementScale;
			this.displacementBias = source.displacementBias;

			this.alphaMap = source.alphaMap;

			this.wireframe = source.wireframe;
			this.wireframeLinewidth = source.wireframeLinewidth;
			this.wireframeLinecap = source.wireframeLinecap;
			this.wireframeLinejoin = source.wireframeLinejoin;

			this.skinning = source.skinning;
			this.morphTargets = source.morphTargets;
			this.morphNormals = source.morphNormals;

			return this;

		};

		/**
		 * parameters = {
		 *  opacity: <float>,
		 *
		 *  bumpMap: new THREE.Texture( <Image> ),
		 *  bumpScale: <float>,
		 *
		 *  normalMap: new THREE.Texture( <Image> ),
		 *  normalMapType: THREE.TangentSpaceNormalMap,
		 *  normalScale: <Vector2>,
		 *
		 *  displacementMap: new THREE.Texture( <Image> ),
		 *  displacementScale: <float>,
		 *  displacementBias: <float>,
		 *
		 *  wireframe: <boolean>,
		 *  wireframeLinewidth: <float>
		 *
		 *  skinning: <bool>,
		 *  morphTargets: <bool>,
		 *  morphNormals: <bool>
		 * }
		 */

		function MeshNormalMaterial( parameters ) {

			Material.call( this );

			this.type = 'MeshNormalMaterial';

			this.bumpMap = null;
			this.bumpScale = 1;

			this.normalMap = null;
			this.normalMapType = TangentSpaceNormalMap;
			this.normalScale = new Vector2( 1, 1 );

			this.displacementMap = null;
			this.displacementScale = 1;
			this.displacementBias = 0;

			this.wireframe = false;
			this.wireframeLinewidth = 1;

			this.fog = false;

			this.skinning = false;
			this.morphTargets = false;
			this.morphNormals = false;

			this.setValues( parameters );

		}

		MeshNormalMaterial.prototype = Object.create( Material.prototype );
		MeshNormalMaterial.prototype.constructor = MeshNormalMaterial;

		MeshNormalMaterial.prototype.isMeshNormalMaterial = true;

		MeshNormalMaterial.prototype.copy = function ( source ) {

			Material.prototype.copy.call( this, source );

			this.bumpMap = source.bumpMap;
			this.bumpScale = source.bumpScale;

			this.normalMap = source.normalMap;
			this.normalMapType = source.normalMapType;
			this.normalScale.copy( source.normalScale );

			this.displacementMap = source.displacementMap;
			this.displacementScale = source.displacementScale;
			this.displacementBias = source.displacementBias;

			this.wireframe = source.wireframe;
			this.wireframeLinewidth = source.wireframeLinewidth;

			this.skinning = source.skinning;
			this.morphTargets = source.morphTargets;
			this.morphNormals = source.morphNormals;

			return this;

		};

		/**
		 * parameters = {
		 *  color: <hex>,
		 *  opacity: <float>,
		 *
		 *  map: new THREE.Texture( <Image> ),
		 *
		 *  lightMap: new THREE.Texture( <Image> ),
		 *  lightMapIntensity: <float>
		 *
		 *  aoMap: new THREE.Texture( <Image> ),
		 *  aoMapIntensity: <float>
		 *
		 *  emissive: <hex>,
		 *  emissiveIntensity: <float>
		 *  emissiveMap: new THREE.Texture( <Image> ),
		 *
		 *  specularMap: new THREE.Texture( <Image> ),
		 *
		 *  alphaMap: new THREE.Texture( <Image> ),
		 *
		 *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),
		 *  combine: THREE.Multiply,
		 *  reflectivity: <float>,
		 *  refractionRatio: <float>,
		 *
		 *  wireframe: <boolean>,
		 *  wireframeLinewidth: <float>,
		 *
		 *  skinning: <bool>,
		 *  morphTargets: <bool>,
		 *  morphNormals: <bool>
		 * }
		 */

		function MeshLambertMaterial( parameters ) {

			Material.call( this );

			this.type = 'MeshLambertMaterial';

			this.color = new Color( 0xffffff ); // diffuse

			this.map = null;

			this.lightMap = null;
			this.lightMapIntensity = 1.0;

			this.aoMap = null;
			this.aoMapIntensity = 1.0;

			this.emissive = new Color( 0x000000 );
			this.emissiveIntensity = 1.0;
			this.emissiveMap = null;

			this.specularMap = null;

			this.alphaMap = null;

			this.envMap = null;
			this.combine = MultiplyOperation;
			this.reflectivity = 1;
			this.refractionRatio = 0.98;

			this.wireframe = false;
			this.wireframeLinewidth = 1;
			this.wireframeLinecap = 'round';
			this.wireframeLinejoin = 'round';

			this.skinning = false;
			this.morphTargets = false;
			this.morphNormals = false;

			this.setValues( parameters );

		}

		MeshLambertMaterial.prototype = Object.create( Material.prototype );
		MeshLambertMaterial.prototype.constructor = MeshLambertMaterial;

		MeshLambertMaterial.prototype.isMeshLambertMaterial = true;

		MeshLambertMaterial.prototype.copy = function ( source ) {

			Material.prototype.copy.call( this, source );

			this.color.copy( source.color );

			this.map = source.map;

			this.lightMap = source.lightMap;
			this.lightMapIntensity = source.lightMapIntensity;

			this.aoMap = source.aoMap;
			this.aoMapIntensity = source.aoMapIntensity;

			this.emissive.copy( source.emissive );
			this.emissiveMap = source.emissiveMap;
			this.emissiveIntensity = source.emissiveIntensity;

			this.specularMap = source.specularMap;

			this.alphaMap = source.alphaMap;

			this.envMap = source.envMap;
			this.combine = source.combine;
			this.reflectivity = source.reflectivity;
			this.refractionRatio = source.refractionRatio;

			this.wireframe = source.wireframe;
			this.wireframeLinewidth = source.wireframeLinewidth;
			this.wireframeLinecap = source.wireframeLinecap;
			this.wireframeLinejoin = source.wireframeLinejoin;

			this.skinning = source.skinning;
			this.morphTargets = source.morphTargets;
			this.morphNormals = source.morphNormals;

			return this;

		};

		/**
		 * parameters = {
		 *  color: <hex>,
		 *  opacity: <float>,
		 *
		 *  matcap: new THREE.Texture( <Image> ),
		 *
		 *  map: new THREE.Texture( <Image> ),
		 *
		 *  bumpMap: new THREE.Texture( <Image> ),
		 *  bumpScale: <float>,
		 *
		 *  normalMap: new THREE.Texture( <Image> ),
		 *  normalMapType: THREE.TangentSpaceNormalMap,
		 *  normalScale: <Vector2>,
		 *
		 *  displacementMap: new THREE.Texture( <Image> ),
		 *  displacementScale: <float>,
		 *  displacementBias: <float>,
		 *
		 *  alphaMap: new THREE.Texture( <Image> ),
		 *
		 *  skinning: <bool>,
		 *  morphTargets: <bool>,
		 *  morphNormals: <bool>
		 * }
		 */

		function MeshMatcapMaterial( parameters ) {

			Material.call( this );

			this.defines = { 'MATCAP': '' };

			this.type = 'MeshMatcapMaterial';

			this.color = new Color( 0xffffff ); // diffuse

			this.matcap = null;

			this.map = null;

			this.bumpMap = null;
			this.bumpScale = 1;

			this.normalMap = null;
			this.normalMapType = TangentSpaceNormalMap;
			this.normalScale = new Vector2( 1, 1 );

			this.displacementMap = null;
			this.displacementScale = 1;
			this.displacementBias = 0;

			this.alphaMap = null;

			this.skinning = false;
			this.morphTargets = false;
			this.morphNormals = false;

			this.setValues( parameters );

		}

		MeshMatcapMaterial.prototype = Object.create( Material.prototype );
		MeshMatcapMaterial.prototype.constructor = MeshMatcapMaterial;

		MeshMatcapMaterial.prototype.isMeshMatcapMaterial = true;

		MeshMatcapMaterial.prototype.copy = function ( source ) {

			Material.prototype.copy.call( this, source );

			this.defines = { 'MATCAP': '' };

			this.color.copy( source.color );

			this.matcap = source.matcap;

			this.map = source.map;

			this.bumpMap = source.bumpMap;
			this.bumpScale = source.bumpScale;

			this.normalMap = source.normalMap;
			this.normalMapType = source.normalMapType;
			this.normalScale.copy( source.normalScale );

			this.displacementMap = source.displacementMap;
			this.displacementScale = source.displacementScale;
			this.displacementBias = source.displacementBias;

			this.alphaMap = source.alphaMap;

			this.skinning = source.skinning;
			this.morphTargets = source.morphTargets;
			this.morphNormals = source.morphNormals;

			return this;

		};

		/**
		 * parameters = {
		 *  color: <hex>,
		 *  opacity: <float>,
		 *
		 *  linewidth: <float>,
		 *
		 *  scale: <float>,
		 *  dashSize: <float>,
		 *  gapSize: <float>
		 * }
		 */

		function LineDashedMaterial( parameters ) {

			LineBasicMaterial.call( this );

			this.type = 'LineDashedMaterial';

			this.scale = 1;
			this.dashSize = 3;
			this.gapSize = 1;

			this.setValues( parameters );

		}

		LineDashedMaterial.prototype = Object.create( LineBasicMaterial.prototype );
		LineDashedMaterial.prototype.constructor = LineDashedMaterial;

		LineDashedMaterial.prototype.isLineDashedMaterial = true;

		LineDashedMaterial.prototype.copy = function ( source ) {

			LineBasicMaterial.prototype.copy.call( this, source );

			this.scale = source.scale;
			this.dashSize = source.dashSize;
			this.gapSize = source.gapSize;

			return this;

		};

		var Materials = /*#__PURE__*/Object.freeze({
			__proto__: null,
			ShadowMaterial: ShadowMaterial,
			SpriteMaterial: SpriteMaterial,
			RawShaderMaterial: RawShaderMaterial,
			ShaderMaterial: ShaderMaterial,
			PointsMaterial: PointsMaterial,
			MeshPhysicalMaterial: MeshPhysicalMaterial,
			MeshStandardMaterial: MeshStandardMaterial,
			MeshPhongMaterial: MeshPhongMaterial,
			MeshToonMaterial: MeshToonMaterial,
			MeshNormalMaterial: MeshNormalMaterial,
			MeshLambertMaterial: MeshLambertMaterial,
			MeshDepthMaterial: MeshDepthMaterial,
			MeshDistanceMaterial: MeshDistanceMaterial,
			MeshBasicMaterial: MeshBasicMaterial,
			MeshMatcapMaterial: MeshMatcapMaterial,
			LineDashedMaterial: LineDashedMaterial,
			LineBasicMaterial: LineBasicMaterial,
			Material: Material
		});

		var AnimationUtils = {

			// same as Array.prototype.slice, but also works on typed arrays
			arraySlice: function ( array, from, to ) {

				if ( AnimationUtils.isTypedArray( array ) ) {

					// in ios9 array.subarray(from, undefined) will return empty array
					// but array.subarray(from) or array.subarray(from, len) is correct
					return new array.constructor( array.subarray( from, to !== undefined ? to : array.length ) );

				}

				return array.slice( from, to );

			},

			// converts an array to a specific type
			convertArray: function ( array, type, forceClone ) {

				if ( ! array || // let 'undefined' and 'null' pass
					! forceClone && array.constructor === type ) { return array; }

				if ( typeof type.BYTES_PER_ELEMENT === 'number' ) {

					return new type( array ); // create typed array

				}

				return Array.prototype.slice.call( array ); // create Array

			},

			isTypedArray: function ( object ) {

				return ArrayBuffer.isView( object ) &&
					! ( object instanceof DataView );

			},

			// returns an array by which times and values can be sorted
			getKeyframeOrder: function ( times ) {

				function compareTime( i, j ) {

					return times[ i ] - times[ j ];

				}

				var n = times.length;
				var result = new Array( n );
				for ( var i = 0; i !== n; ++ i ) { result[ i ] = i; }

				result.sort( compareTime );

				return result;

			},

			// uses the array previously returned by 'getKeyframeOrder' to sort data
			sortedArray: function ( values, stride, order ) {

				var nValues = values.length;
				var result = new values.constructor( nValues );

				for ( var i = 0, dstOffset = 0; dstOffset !== nValues; ++ i ) {

					var srcOffset = order[ i ] * stride;

					for ( var j = 0; j !== stride; ++ j ) {

						result[ dstOffset ++ ] = values[ srcOffset + j ];

					}

				}

				return result;

			},

			// function for parsing AOS keyframe formats
			flattenJSON: function ( jsonKeys, times, values, valuePropertyName ) {

				var i = 1, key = jsonKeys[ 0 ];

				while ( key !== undefined && key[ valuePropertyName ] === undefined ) {

					key = jsonKeys[ i ++ ];

				}

				if ( key === undefined ) { return; } // no data

				var value = key[ valuePropertyName ];
				if ( value === undefined ) { return; } // no data

				if ( Array.isArray( value ) ) {

					do {

						value = key[ valuePropertyName ];

						if ( value !== undefined ) {

							times.push( key.time );
							values.push.apply( values, value ); // push all elements

						}

						key = jsonKeys[ i ++ ];

					} while ( key !== undefined );

				} else if ( value.toArray !== undefined ) {

					// ...assume THREE.Math-ish

					do {

						value = key[ valuePropertyName ];

						if ( value !== undefined ) {

							times.push( key.time );
							value.toArray( values, values.length );

						}

						key = jsonKeys[ i ++ ];

					} while ( key !== undefined );

				} else {

					// otherwise push as-is

					do {

						value = key[ valuePropertyName ];

						if ( value !== undefined ) {

							times.push( key.time );
							values.push( value );

						}

						key = jsonKeys[ i ++ ];

					} while ( key !== undefined );

				}

			},

			subclip: function ( sourceClip, name, startFrame, endFrame, fps ) {

				fps = fps || 30;

				var clip = sourceClip.clone();

				clip.name = name;

				var tracks = [];

				for ( var i = 0; i < clip.tracks.length; ++ i ) {

					var track = clip.tracks[ i ];
					var valueSize = track.getValueSize();

					var times = [];
					var values = [];

					for ( var j = 0; j < track.times.length; ++ j ) {

						var frame = track.times[ j ] * fps;

						if ( frame < startFrame || frame >= endFrame ) { continue; }

						times.push( track.times[ j ] );

						for ( var k = 0; k < valueSize; ++ k ) {

							values.push( track.values[ j * valueSize + k ] );

						}

					}

					if ( times.length === 0 ) { continue; }

					track.times = AnimationUtils.convertArray( times, track.times.constructor );
					track.values = AnimationUtils.convertArray( values, track.values.constructor );

					tracks.push( track );

				}

				clip.tracks = tracks;

				// find minimum .times value across all tracks in the trimmed clip

				var minStartTime = Infinity;

				for ( var i$1 = 0; i$1 < clip.tracks.length; ++ i$1 ) {

					if ( minStartTime > clip.tracks[ i$1 ].times[ 0 ] ) {

						minStartTime = clip.tracks[ i$1 ].times[ 0 ];

					}

				}

				// shift all tracks such that clip begins at t=0

				for ( var i$2 = 0; i$2 < clip.tracks.length; ++ i$2 ) {

					clip.tracks[ i$2 ].shift( - 1 * minStartTime );

				}

				clip.resetDuration();

				return clip;

			},

			makeClipAdditive: function ( targetClip, referenceFrame, referenceClip, fps ) {

				if ( referenceFrame === undefined ) { referenceFrame = 0; }
				if ( referenceClip === undefined ) { referenceClip = targetClip; }
				if ( fps === undefined || fps <= 0 ) { fps = 30; }

				var numTracks = targetClip.tracks.length;
				var referenceTime = referenceFrame / fps;

				// Make each track's values relative to the values at the reference frame
				var loop = function ( i ) {

					var referenceTrack = referenceClip.tracks[ i ];
					var referenceTrackType = referenceTrack.ValueTypeName;

					// Skip this track if it's non-numeric
					if ( referenceTrackType === 'bool' || referenceTrackType === 'string' ) { return; }

					// Find the track in the target clip whose name and type matches the reference track
					var targetTrack = targetClip.tracks.find( function ( track ) {

						return track.name === referenceTrack.name
							&& track.ValueTypeName === referenceTrackType;

					} );

					if ( targetTrack === undefined ) { return; }

					var referenceOffset = 0;
					var referenceValueSize = referenceTrack.getValueSize();

					if ( referenceTrack.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline ) {

						referenceOffset = referenceValueSize / 3;

					}

					var targetOffset = 0;
					var targetValueSize = targetTrack.getValueSize();

					if ( targetTrack.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline ) {

						targetOffset = targetValueSize / 3;

					}

					var lastIndex = referenceTrack.times.length - 1;
					var referenceValue = (void 0);

					// Find the value to subtract out of the track
					if ( referenceTime <= referenceTrack.times[ 0 ] ) {

						// Reference frame is earlier than the first keyframe, so just use the first keyframe
						var startIndex = referenceOffset;
						var endIndex = referenceValueSize - referenceOffset;
						referenceValue = AnimationUtils.arraySlice( referenceTrack.values, startIndex, endIndex );

					} else if ( referenceTime >= referenceTrack.times[ lastIndex ] ) {

						// Reference frame is after the last keyframe, so just use the last keyframe
						var startIndex$1 = lastIndex * referenceValueSize + referenceOffset;
						var endIndex$1 = startIndex$1 + referenceValueSize - referenceOffset;
						referenceValue = AnimationUtils.arraySlice( referenceTrack.values, startIndex$1, endIndex$1 );

					} else {

						// Interpolate to the reference value
						var interpolant = referenceTrack.createInterpolant();
						var startIndex$2 = referenceOffset;
						var endIndex$2 = referenceValueSize - referenceOffset;
						interpolant.evaluate( referenceTime );
						referenceValue = AnimationUtils.arraySlice( interpolant.resultBuffer, startIndex$2, endIndex$2 );

					}

					// Conjugate the quaternion
					if ( referenceTrackType === 'quaternion' ) {

						var referenceQuat = new Quaternion().fromArray( referenceValue ).normalize().conjugate();
						referenceQuat.toArray( referenceValue );

					}

					// Subtract the reference value from all of the track values

					var numTimes = targetTrack.times.length;
					for ( var j = 0; j < numTimes; ++ j ) {

						var valueStart = j * targetValueSize + targetOffset;

						if ( referenceTrackType === 'quaternion' ) {

							// Multiply the conjugate for quaternion track types
							Quaternion.multiplyQuaternionsFlat(
								targetTrack.values,
								valueStart,
								referenceValue,
								0,
								targetTrack.values,
								valueStart
							);

						} else {

							var valueEnd = targetValueSize - targetOffset * 2;

							// Subtract each value for all other numeric track types
							for ( var k = 0; k < valueEnd; ++ k ) {

								targetTrack.values[ valueStart + k ] -= referenceValue[ k ];

							}

						}

					}

				};

				for ( var i = 0; i < numTracks; ++ i ) loop( i );

				targetClip.blendMode = AdditiveAnimationBlendMode;

				return targetClip;

			}

		};

		/**
		 * Abstract base class of interpolants over parametric samples.
		 *
		 * The parameter domain is one dimensional, typically the time or a path
		 * along a curve defined by the data.
		 *
		 * The sample values can have any dimensionality and derived classes may
		 * apply special interpretations to the data.
		 *
		 * This class provides the interval seek in a Template Method, deferring
		 * the actual interpolation to derived classes.
		 *
		 * Time complexity is O(1) for linear access crossing at most two points
		 * and O(log N) for random access, where N is the number of positions.
		 *
		 * References:
		 *
		 * 		http://www.oodesign.com/template-method-pattern.html
		 *
		 */

		function Interpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {

			this.parameterPositions = parameterPositions;
			this._cachedIndex = 0;

			this.resultBuffer = resultBuffer !== undefined ?
				resultBuffer : new sampleValues.constructor( sampleSize );
			this.sampleValues = sampleValues;
			this.valueSize = sampleSize;

		}

		Object.assign( Interpolant.prototype, {

			evaluate: function ( t ) {

				var pp = this.parameterPositions;
				var i1 = this._cachedIndex,
					t1 = pp[ i1 ],
					t0 = pp[ i1 - 1 ];

				validate_interval: {

					seek: {

						var right;

						linear_scan: {

							//- See http://jsperf.com/comparison-to-undefined/3
							//- slower code:
							//-
							//- 				if ( t >= t1 || t1 === undefined ) {
							forward_scan: if ( ! ( t < t1 ) ) {

								for ( var giveUpAt = i1 + 2; ; ) {

									if ( t1 === undefined ) {

										if ( t < t0 ) { break forward_scan; }

										// after end

										i1 = pp.length;
										this._cachedIndex = i1;
										return this.afterEnd_( i1 - 1, t, t0 );

									}

									if ( i1 === giveUpAt ) { break; } // this loop

									t0 = t1;
									t1 = pp[ ++ i1 ];

									if ( t < t1 ) {

										// we have arrived at the sought interval
										break seek;

									}

								}

								// prepare binary search on the right side of the index
								right = pp.length;
								break linear_scan;

							}

							//- slower code:
							//-					if ( t < t0 || t0 === undefined ) {
							if ( ! ( t >= t0 ) ) {

								// looping?

								var t1global = pp[ 1 ];

								if ( t < t1global ) {

									i1 = 2; // + 1, using the scan for the details
									t0 = t1global;

								}

								// linear reverse scan

								for ( var giveUpAt$1 = i1 - 2; ; ) {

									if ( t0 === undefined ) {

										// before start

										this._cachedIndex = 0;
										return this.beforeStart_( 0, t, t1 );

									}

									if ( i1 === giveUpAt$1 ) { break; } // this loop

									t1 = t0;
									t0 = pp[ -- i1 - 1 ];

									if ( t >= t0 ) {

										// we have arrived at the sought interval
										break seek;

									}

								}

								// prepare binary search on the left side of the index
								right = i1;
								i1 = 0;
								break linear_scan;

							}

							// the interval is valid

							break validate_interval;

						} // linear scan

						// binary search

						while ( i1 < right ) {

							var mid = ( i1 + right ) >>> 1;

							if ( t < pp[ mid ] ) {

								right = mid;

							} else {

								i1 = mid + 1;

							}

						}

						t1 = pp[ i1 ];
						t0 = pp[ i1 - 1 ];

						// check boundary cases, again

						if ( t0 === undefined ) {

							this._cachedIndex = 0;
							return this.beforeStart_( 0, t, t1 );

						}

						if ( t1 === undefined ) {

							i1 = pp.length;
							this._cachedIndex = i1;
							return this.afterEnd_( i1 - 1, t0, t );

						}

					} // seek

					this._cachedIndex = i1;

					this.intervalChanged_( i1, t0, t1 );

				} // validate_interval

				return this.interpolate_( i1, t0, t, t1 );

			},

			settings: null, // optional, subclass-specific settings structure
			// Note: The indirection allows central control of many interpolants.

			// --- Protected interface

			DefaultSettings_: {},

			getSettings_: function () {

				return this.settings || this.DefaultSettings_;

			},

			copySampleValue_: function ( index ) {

				// copies a sample value to the result buffer

				var result = this.resultBuffer,
					values = this.sampleValues,
					stride = this.valueSize,
					offset = index * stride;

				for ( var i = 0; i !== stride; ++ i ) {

					result[ i ] = values[ offset + i ];

				}

				return result;

			},

			// Template methods for derived classes:

			interpolate_: function ( /* i1, t0, t, t1 */ ) {

				throw new Error( 'call to abstract method' );
				// implementations shall return this.resultBuffer

			},

			intervalChanged_: function ( /* i1, t0, t1 */ ) {

				// empty

			}

		} );

		// DECLARE ALIAS AFTER assign prototype
		Object.assign( Interpolant.prototype, {

			//( 0, t, t0 ), returns this.resultBuffer
			beforeStart_: Interpolant.prototype.copySampleValue_,

			//( N-1, tN-1, t ), returns this.resultBuffer
			afterEnd_: Interpolant.prototype.copySampleValue_,

		} );

		/**
		 * Fast and simple cubic spline interpolant.
		 *
		 * It was derived from a Hermitian construction setting the first derivative
		 * at each sample position to the linear slope between neighboring positions
		 * over their parameter interval.
		 */

		function CubicInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {

			Interpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );

			this._weightPrev = - 0;
			this._offsetPrev = - 0;
			this._weightNext = - 0;
			this._offsetNext = - 0;

		}

		CubicInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {

			constructor: CubicInterpolant,

			DefaultSettings_: {

				endingStart: ZeroCurvatureEnding,
				endingEnd: ZeroCurvatureEnding

			},

			intervalChanged_: function ( i1, t0, t1 ) {

				var pp = this.parameterPositions;
				var iPrev = i1 - 2,
					iNext = i1 + 1,

					tPrev = pp[ iPrev ],
					tNext = pp[ iNext ];

				if ( tPrev === undefined ) {

					switch ( this.getSettings_().endingStart ) {

						case ZeroSlopeEnding:

							// f'(t0) = 0
							iPrev = i1;
							tPrev = 2 * t0 - t1;

							break;

						case WrapAroundEnding:

							// use the other end of the curve
							iPrev = pp.length - 2;
							tPrev = t0 + pp[ iPrev ] - pp[ iPrev + 1 ];

							break;

						default: // ZeroCurvatureEnding

							// f''(t0) = 0 a.k.a. Natural Spline
							iPrev = i1;
							tPrev = t1;

					}

				}

				if ( tNext === undefined ) {

					switch ( this.getSettings_().endingEnd ) {

						case ZeroSlopeEnding:

							// f'(tN) = 0
							iNext = i1;
							tNext = 2 * t1 - t0;

							break;

						case WrapAroundEnding:

							// use the other end of the curve
							iNext = 1;
							tNext = t1 + pp[ 1 ] - pp[ 0 ];

							break;

						default: // ZeroCurvatureEnding

							// f''(tN) = 0, a.k.a. Natural Spline
							iNext = i1 - 1;
							tNext = t0;

					}

				}

				var halfDt = ( t1 - t0 ) * 0.5,
					stride = this.valueSize;

				this._weightPrev = halfDt / ( t0 - tPrev );
				this._weightNext = halfDt / ( tNext - t1 );
				this._offsetPrev = iPrev * stride;
				this._offsetNext = iNext * stride;

			},

			interpolate_: function ( i1, t0, t, t1 ) {

				var result = this.resultBuffer,
					values = this.sampleValues,
					stride = this.valueSize,

					o1 = i1 * stride,		o0 = o1 - stride,
					oP = this._offsetPrev, 	oN = this._offsetNext,
					wP = this._weightPrev,	wN = this._weightNext,

					p = ( t - t0 ) / ( t1 - t0 ),
					pp = p * p,
					ppp = pp * p;

				// evaluate polynomials

				var sP = - wP * ppp + 2 * wP * pp - wP * p;
				var s0 = ( 1 + wP ) * ppp + ( - 1.5 - 2 * wP ) * pp + ( - 0.5 + wP ) * p + 1;
				var s1 = ( - 1 - wN ) * ppp + ( 1.5 + wN ) * pp + 0.5 * p;
				var sN = wN * ppp - wN * pp;

				// combine data linearly

				for ( var i = 0; i !== stride; ++ i ) {

					result[ i ] =
							sP * values[ oP + i ] +
							s0 * values[ o0 + i ] +
							s1 * values[ o1 + i ] +
							sN * values[ oN + i ];

				}

				return result;

			}

		} );

		function LinearInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {

			Interpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );

		}

		LinearInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {

			constructor: LinearInterpolant,

			interpolate_: function ( i1, t0, t, t1 ) {

				var result = this.resultBuffer,
					values = this.sampleValues,
					stride = this.valueSize,

					offset1 = i1 * stride,
					offset0 = offset1 - stride,

					weight1 = ( t - t0 ) / ( t1 - t0 ),
					weight0 = 1 - weight1;

				for ( var i = 0; i !== stride; ++ i ) {

					result[ i ] =
							values[ offset0 + i ] * weight0 +
							values[ offset1 + i ] * weight1;

				}

				return result;

			}

		} );

		/**
		 *
		 * Interpolant that evaluates to the sample value at the position preceeding
		 * the parameter.
		 */

		function DiscreteInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {

			Interpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );

		}

		DiscreteInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {

			constructor: DiscreteInterpolant,

			interpolate_: function ( i1 /*, t0, t, t1 */ ) {

				return this.copySampleValue_( i1 - 1 );

			}

		} );

		function KeyframeTrack( name, times, values, interpolation ) {

			if ( name === undefined ) { throw new Error( 'THREE.KeyframeTrack: track name is undefined' ); }
			if ( times === undefined || times.length === 0 ) { throw new Error( 'THREE.KeyframeTrack: no keyframes in track named ' + name ); }

			this.name = name;

			this.times = AnimationUtils.convertArray( times, this.TimeBufferType );
			this.values = AnimationUtils.convertArray( values, this.ValueBufferType );

			this.setInterpolation( interpolation || this.DefaultInterpolation );

		}

		// Static methods

		Object.assign( KeyframeTrack, {

			// Serialization (in static context, because of constructor invocation
			// and automatic invocation of .toJSON):

			toJSON: function ( track ) {

				var trackType = track.constructor;

				var json;

				// derived classes can define a static toJSON method
				if ( trackType.toJSON !== undefined ) {

					json = trackType.toJSON( track );

				} else {

					// by default, we assume the data can be serialized as-is
					json = {

						'name': track.name,
						'times': AnimationUtils.convertArray( track.times, Array ),
						'values': AnimationUtils.convertArray( track.values, Array )

					};

					var interpolation = track.getInterpolation();

					if ( interpolation !== track.DefaultInterpolation ) {

						json.interpolation = interpolation;

					}

				}

				json.type = track.ValueTypeName; // mandatory

				return json;

			}

		} );

		Object.assign( KeyframeTrack.prototype, {

			constructor: KeyframeTrack,

			TimeBufferType: Float32Array,

			ValueBufferType: Float32Array,

			DefaultInterpolation: InterpolateLinear,

			InterpolantFactoryMethodDiscrete: function ( result ) {

				return new DiscreteInterpolant( this.times, this.values, this.getValueSize(), result );

			},

			InterpolantFactoryMethodLinear: function ( result ) {

				return new LinearInterpolant( this.times, this.values, this.getValueSize(), result );

			},

			InterpolantFactoryMethodSmooth: function ( result ) {

				return new CubicInterpolant( this.times, this.values, this.getValueSize(), result );

			},

			setInterpolation: function ( interpolation ) {

				var factoryMethod;

				switch ( interpolation ) {

					case InterpolateDiscrete:

						factoryMethod = this.InterpolantFactoryMethodDiscrete;

						break;

					case InterpolateLinear:

						factoryMethod = this.InterpolantFactoryMethodLinear;

						break;

					case InterpolateSmooth:

						factoryMethod = this.InterpolantFactoryMethodSmooth;

						break;

				}

				if ( factoryMethod === undefined ) {

					var message = "unsupported interpolation for " +
						this.ValueTypeName + " keyframe track named " + this.name;

					if ( this.createInterpolant === undefined ) {

						// fall back to default, unless the default itself is messed up
						if ( interpolation !== this.DefaultInterpolation ) {

							this.setInterpolation( this.DefaultInterpolation );

						} else {

							throw new Error( message ); // fatal, in this case

						}

					}

					console.warn( 'THREE.KeyframeTrack:', message );
					return this;

				}

				this.createInterpolant = factoryMethod;

				return this;

			},

			getInterpolation: function () {

				switch ( this.createInterpolant ) {

					case this.InterpolantFactoryMethodDiscrete:

						return InterpolateDiscrete;

					case this.InterpolantFactoryMethodLinear:

						return InterpolateLinear;

					case this.InterpolantFactoryMethodSmooth:

						return InterpolateSmooth;

				}

			},

			getValueSize: function () {

				return this.values.length / this.times.length;

			},

			// move all keyframes either forwards or backwards in time
			shift: function ( timeOffset ) {

				if ( timeOffset !== 0.0 ) {

					var times = this.times;

					for ( var i = 0, n = times.length; i !== n; ++ i ) {

						times[ i ] += timeOffset;

					}

				}

				return this;

			},

			// scale all keyframe times by a factor (useful for frame <-> seconds conversions)
			scale: function ( timeScale ) {

				if ( timeScale !== 1.0 ) {

					var times = this.times;

					for ( var i = 0, n = times.length; i !== n; ++ i ) {

						times[ i ] *= timeScale;

					}

				}

				return this;

			},

			// removes keyframes before and after animation without changing any values within the range [startTime, endTime].
			// IMPORTANT: We do not shift around keys to the start of the track time, because for interpolated keys this will change their values
			trim: function ( startTime, endTime ) {

				var times = this.times,
					nKeys = times.length;

				var from = 0,
					to = nKeys - 1;

				while ( from !== nKeys && times[ from ] < startTime ) {

					++ from;

				}

				while ( to !== - 1 && times[ to ] > endTime ) {

					-- to;

				}

				++ to; // inclusive -> exclusive bound

				if ( from !== 0 || to !== nKeys ) {

					// empty tracks are forbidden, so keep at least one keyframe
					if ( from >= to ) {

						to = Math.max( to, 1 );
						from = to - 1;

					}

					var stride = this.getValueSize();
					this.times = AnimationUtils.arraySlice( times, from, to );
					this.values = AnimationUtils.arraySlice( this.values, from * stride, to * stride );

				}

				return this;

			},

			// ensure we do not get a GarbageInGarbageOut situation, make sure tracks are at least minimally viable
			validate: function () {

				var valid = true;

				var valueSize = this.getValueSize();
				if ( valueSize - Math.floor( valueSize ) !== 0 ) {

					console.error( 'THREE.KeyframeTrack: Invalid value size in track.', this );
					valid = false;

				}

				var times = this.times,
					values = this.values,

					nKeys = times.length;

				if ( nKeys === 0 ) {

					console.error( 'THREE.KeyframeTrack: Track is empty.', this );
					valid = false;

				}

				var prevTime = null;

				for ( var i = 0; i !== nKeys; i ++ ) {

					var currTime = times[ i ];

					if ( typeof currTime === 'number' && isNaN( currTime ) ) {

						console.error( 'THREE.KeyframeTrack: Time is not a valid number.', this, i, currTime );
						valid = false;
						break;

					}

					if ( prevTime !== null && prevTime > currTime ) {

						console.error( 'THREE.KeyframeTrack: Out of order keys.', this, i, currTime, prevTime );
						valid = false;
						break;

					}

					prevTime = currTime;

				}

				if ( values !== undefined ) {

					if ( AnimationUtils.isTypedArray( values ) ) {

						for ( var i$1 = 0, n = values.length; i$1 !== n; ++ i$1 ) {

							var value = values[ i$1 ];

							if ( isNaN( value ) ) {

								console.error( 'THREE.KeyframeTrack: Value is not a valid number.', this, i$1, value );
								valid = false;
								break;

							}

						}

					}

				}

				return valid;

			},

			// removes equivalent sequential keys as common in morph target sequences
			// (0,0,0,0,1,1,1,0,0,0,0,0,0,0) --> (0,0,1,1,0,0)
			optimize: function () {

				// times or values may be shared with other tracks, so overwriting is unsafe
				var times = AnimationUtils.arraySlice( this.times ),
					values = AnimationUtils.arraySlice( this.values ),
					stride = this.getValueSize(),

					smoothInterpolation = this.getInterpolation() === InterpolateSmooth,

					lastIndex = times.length - 1;

				var writeIndex = 1;

				for ( var i = 1; i < lastIndex; ++ i ) {

					var keep = false;

					var time = times[ i ];
					var timeNext = times[ i + 1 ];

					// remove adjacent keyframes scheduled at the same time

					if ( time !== timeNext && ( i !== 1 || time !== time[ 0 ] ) ) {

						if ( ! smoothInterpolation ) {

							// remove unnecessary keyframes same as their neighbors

							var offset = i * stride,
								offsetP = offset - stride,
								offsetN = offset + stride;

							for ( var j = 0; j !== stride; ++ j ) {

								var value = values[ offset + j ];

								if ( value !== values[ offsetP + j ] ||
									value !== values[ offsetN + j ] ) {

									keep = true;
									break;

								}

							}

						} else {

							keep = true;

						}

					}

					// in-place compaction

					if ( keep ) {

						if ( i !== writeIndex ) {

							times[ writeIndex ] = times[ i ];

							var readOffset = i * stride,
								writeOffset = writeIndex * stride;

							for ( var j$1 = 0; j$1 !== stride; ++ j$1 ) {

								values[ writeOffset + j$1 ] = values[ readOffset + j$1 ];

							}

						}

						++ writeIndex;

					}

				}

				// flush last keyframe (compaction looks ahead)

				if ( lastIndex > 0 ) {

					times[ writeIndex ] = times[ lastIndex ];

					for ( var readOffset$1 = lastIndex * stride, writeOffset$1 = writeIndex * stride, j$2 = 0; j$2 !== stride; ++ j$2 ) {

						values[ writeOffset$1 + j$2 ] = values[ readOffset$1 + j$2 ];

					}

					++ writeIndex;

				}

				if ( writeIndex !== times.length ) {

					this.times = AnimationUtils.arraySlice( times, 0, writeIndex );
					this.values = AnimationUtils.arraySlice( values, 0, writeIndex * stride );

				} else {

					this.times = times;
					this.values = values;

				}

				return this;

			},

			clone: function () {

				var times = AnimationUtils.arraySlice( this.times, 0 );
				var values = AnimationUtils.arraySlice( this.values, 0 );

				var TypedKeyframeTrack = this.constructor;
				var track = new TypedKeyframeTrack( this.name, times, values );

				// Interpolant argument to constructor is not saved, so copy the factory method directly.
				track.createInterpolant = this.createInterpolant;

				return track;

			}

		} );

		/**
		 * A Track of Boolean keyframe values.
		 */

		function BooleanKeyframeTrack( name, times, values ) {

			KeyframeTrack.call( this, name, times, values );

		}

		BooleanKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {

			constructor: BooleanKeyframeTrack,

			ValueTypeName: 'bool',
			ValueBufferType: Array,

			DefaultInterpolation: InterpolateDiscrete,

			InterpolantFactoryMethodLinear: undefined,
			InterpolantFactoryMethodSmooth: undefined

			// Note: Actually this track could have a optimized / compressed
			// representation of a single value and a custom interpolant that
			// computes "firstValue ^ isOdd( index )".

		} );

		/**
		 * A Track of keyframe values that represent color.
		 */

		function ColorKeyframeTrack( name, times, values, interpolation ) {

			KeyframeTrack.call( this, name, times, values, interpolation );

		}

		ColorKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {

			constructor: ColorKeyframeTrack,

			ValueTypeName: 'color'

			// ValueBufferType is inherited

			// DefaultInterpolation is inherited

			// Note: Very basic implementation and nothing special yet.
			// However, this is the place for color space parameterization.

		} );

		/**
		 * A Track of numeric keyframe values.
		 */

		function NumberKeyframeTrack( name, times, values, interpolation ) {

			KeyframeTrack.call( this, name, times, values, interpolation );

		}

		NumberKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {

			constructor: NumberKeyframeTrack,

			ValueTypeName: 'number'

			// ValueBufferType is inherited

			// DefaultInterpolation is inherited

		} );

		/**
		 * Spherical linear unit quaternion interpolant.
		 */

		function QuaternionLinearInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {

			Interpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );

		}

		QuaternionLinearInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {

			constructor: QuaternionLinearInterpolant,

			interpolate_: function ( i1, t0, t, t1 ) {

				var result = this.resultBuffer,
					values = this.sampleValues,
					stride = this.valueSize,

					alpha = ( t - t0 ) / ( t1 - t0 );

				var offset = i1 * stride;

				for ( var end = offset + stride; offset !== end; offset += 4 ) {

					Quaternion.slerpFlat( result, 0, values, offset - stride, values, offset, alpha );

				}

				return result;

			}

		} );

		/**
		 * A Track of quaternion keyframe values.
		 */

		function QuaternionKeyframeTrack( name, times, values, interpolation ) {

			KeyframeTrack.call( this, name, times, values, interpolation );

		}

		QuaternionKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {

			constructor: QuaternionKeyframeTrack,

			ValueTypeName: 'quaternion',

			// ValueBufferType is inherited

			DefaultInterpolation: InterpolateLinear,

			InterpolantFactoryMethodLinear: function ( result ) {

				return new QuaternionLinearInterpolant( this.times, this.values, this.getValueSize(), result );

			},

			InterpolantFactoryMethodSmooth: undefined // not yet implemented

		} );

		/**
		 * A Track that interpolates Strings
		 */

		function StringKeyframeTrack( name, times, values, interpolation ) {

			KeyframeTrack.call( this, name, times, values, interpolation );

		}

		StringKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {

			constructor: StringKeyframeTrack,

			ValueTypeName: 'string',
			ValueBufferType: Array,

			DefaultInterpolation: InterpolateDiscrete,

			InterpolantFactoryMethodLinear: undefined,

			InterpolantFactoryMethodSmooth: undefined

		} );

		/**
		 * A Track of vectored keyframe values.
		 */

		function VectorKeyframeTrack( name, times, values, interpolation ) {

			KeyframeTrack.call( this, name, times, values, interpolation );

		}

		VectorKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {

			constructor: VectorKeyframeTrack,

			ValueTypeName: 'vector'

			// ValueBufferType is inherited

			// DefaultInterpolation is inherited

		} );

		function AnimationClip( name, duration, tracks, blendMode ) {

			this.name = name;
			this.tracks = tracks;
			this.duration = ( duration !== undefined ) ? duration : - 1;
			this.blendMode = ( blendMode !== undefined ) ? blendMode : NormalAnimationBlendMode;

			this.uuid = MathUtils.generateUUID();

			// this means it should figure out its duration by scanning the tracks
			if ( this.duration < 0 ) {

				this.resetDuration();

			}

		}

		function getTrackTypeForValueTypeName( typeName ) {

			switch ( typeName.toLowerCase() ) {

				case 'scalar':
				case 'double':
				case 'float':
				case 'number':
				case 'integer':

					return NumberKeyframeTrack;

				case 'vector':
				case 'vector2':
				case 'vector3':
				case 'vector4':

					return VectorKeyframeTrack;

				case 'color':

					return ColorKeyframeTrack;

				case 'quaternion':

					return QuaternionKeyframeTrack;

				case 'bool':
				case 'boolean':

					return BooleanKeyframeTrack;

				case 'string':

					return StringKeyframeTrack;

			}

			throw new Error( 'THREE.KeyframeTrack: Unsupported typeName: ' + typeName );

		}

		function parseKeyframeTrack( json ) {

			if ( json.type === undefined ) {

				throw new Error( 'THREE.KeyframeTrack: track type undefined, can not parse' );

			}

			var trackType = getTrackTypeForValueTypeName( json.type );

			if ( json.times === undefined ) {

				var times = [], values = [];

				AnimationUtils.flattenJSON( json.keys, times, values, 'value' );

				json.times = times;
				json.values = values;

			}

			// derived classes can define a static parse method
			if ( trackType.parse !== undefined ) {

				return trackType.parse( json );

			} else {

				// by default, we assume a constructor compatible with the base
				return new trackType( json.name, json.times, json.values, json.interpolation );

			}

		}

		Object.assign( AnimationClip, {

			parse: function ( json ) {

				var tracks = [],
					jsonTracks = json.tracks,
					frameTime = 1.0 / ( json.fps || 1.0 );

				for ( var i = 0, n = jsonTracks.length; i !== n; ++ i ) {

					tracks.push( parseKeyframeTrack( jsonTracks[ i ] ).scale( frameTime ) );

				}

				return new AnimationClip( json.name, json.duration, tracks, json.blendMode );

			},

			toJSON: function ( clip ) {

				var tracks = [],
					clipTracks = clip.tracks;

				var json = {

					'name': clip.name,
					'duration': clip.duration,
					'tracks': tracks,
					'uuid': clip.uuid,
					'blendMode': clip.blendMode

				};

				for ( var i = 0, n = clipTracks.length; i !== n; ++ i ) {

					tracks.push( KeyframeTrack.toJSON( clipTracks[ i ] ) );

				}

				return json;

			},

			CreateFromMorphTargetSequence: function ( name, morphTargetSequence, fps, noLoop ) {

				var numMorphTargets = morphTargetSequence.length;
				var tracks = [];

				for ( var i = 0; i < numMorphTargets; i ++ ) {

					var times = [];
					var values = [];

					times.push(
						( i + numMorphTargets - 1 ) % numMorphTargets,
						i,
						( i + 1 ) % numMorphTargets );

					values.push( 0, 1, 0 );

					var order = AnimationUtils.getKeyframeOrder( times );
					times = AnimationUtils.sortedArray( times, 1, order );
					values = AnimationUtils.sortedArray( values, 1, order );

					// if there is a key at the first frame, duplicate it as the
					// last frame as well for perfect loop.
					if ( ! noLoop && times[ 0 ] === 0 ) {

						times.push( numMorphTargets );
						values.push( values[ 0 ] );

					}

					tracks.push(
						new NumberKeyframeTrack(
							'.morphTargetInfluences[' + morphTargetSequence[ i ].name + ']',
							times, values
						).scale( 1.0 / fps ) );

				}

				return new AnimationClip( name, - 1, tracks );

			},

			findByName: function ( objectOrClipArray, name ) {

				var clipArray = objectOrClipArray;

				if ( ! Array.isArray( objectOrClipArray ) ) {

					var o = objectOrClipArray;
					clipArray = o.geometry && o.geometry.animations || o.animations;

				}

				for ( var i = 0; i < clipArray.length; i ++ ) {

					if ( clipArray[ i ].name === name ) {

						return clipArray[ i ];

					}

				}

				return null;

			},

			CreateClipsFromMorphTargetSequences: function ( morphTargets, fps, noLoop ) {

				var animationToMorphTargets = {};

				// tested with https://regex101.com/ on trick sequences
				// such flamingo_flyA_003, flamingo_run1_003, crdeath0059
				var pattern = /^([\w-]*?)([\d]+)$/;

				// sort morph target names into animation groups based
				// patterns like Walk_001, Walk_002, Run_001, Run_002
				for ( var i = 0, il = morphTargets.length; i < il; i ++ ) {

					var morphTarget = morphTargets[ i ];
					var parts = morphTarget.name.match( pattern );

					if ( parts && parts.length > 1 ) {

						var name = parts[ 1 ];

						var animationMorphTargets = animationToMorphTargets[ name ];

						if ( ! animationMorphTargets ) {

							animationToMorphTargets[ name ] = animationMorphTargets = [];

						}

						animationMorphTargets.push( morphTarget );

					}

				}

				var clips = [];

				for ( var name$1 in animationToMorphTargets ) {

					clips.push( AnimationClip.CreateFromMorphTargetSequence( name$1, animationToMorphTargets[ name$1 ], fps, noLoop ) );

				}

				return clips;

			},

			// parse the animation.hierarchy format
			parseAnimation: function ( animation, bones ) {

				if ( ! animation ) {

					console.error( 'THREE.AnimationClip: No animation in JSONLoader data.' );
					return null;

				}

				var addNonemptyTrack = function ( trackType, trackName, animationKeys, propertyName, destTracks ) {

					// only return track if there are actually keys.
					if ( animationKeys.length !== 0 ) {

						var times = [];
						var values = [];

						AnimationUtils.flattenJSON( animationKeys, times, values, propertyName );

						// empty keys are filtered out, so check again
						if ( times.length !== 0 ) {

							destTracks.push( new trackType( trackName, times, values ) );

						}

					}

				};

				var tracks = [];

				var clipName = animation.name || 'default';
				var fps = animation.fps || 30;
				var blendMode = animation.blendMode;

				// automatic length determination in AnimationClip.
				var duration = animation.length || - 1;

				var hierarchyTracks = animation.hierarchy || [];

				for ( var h = 0; h < hierarchyTracks.length; h ++ ) {

					var animationKeys = hierarchyTracks[ h ].keys;

					// skip empty tracks
					if ( ! animationKeys || animationKeys.length === 0 ) { continue; }

					// process morph targets
					if ( animationKeys[ 0 ].morphTargets ) {

						// figure out all morph targets used in this track
						var morphTargetNames = {};

						var k = (void 0);

						for ( k = 0; k < animationKeys.length; k ++ ) {

							if ( animationKeys[ k ].morphTargets ) {

								for ( var m = 0; m < animationKeys[ k ].morphTargets.length; m ++ ) {

									morphTargetNames[ animationKeys[ k ].morphTargets[ m ] ] = - 1;

								}

							}

						}

						// create a track for each morph target with all zero
						// morphTargetInfluences except for the keys in which
						// the morphTarget is named.
						for ( var morphTargetName in morphTargetNames ) {

							var times = [];
							var values = [];

							for ( var m$1 = 0; m$1 !== animationKeys[ k ].morphTargets.length; ++ m$1 ) {

								var animationKey = animationKeys[ k ];

								times.push( animationKey.time );
								values.push( ( animationKey.morphTarget === morphTargetName ) ? 1 : 0 );

							}

							tracks.push( new NumberKeyframeTrack( '.morphTargetInfluence[' + morphTargetName + ']', times, values ) );

						}

						duration = morphTargetNames.length * ( fps || 1.0 );

					} else {

						// ...assume skeletal animation

						var boneName = '.bones[' + bones[ h ].name + ']';

						addNonemptyTrack(
							VectorKeyframeTrack, boneName + '.position',
							animationKeys, 'pos', tracks );

						addNonemptyTrack(
							QuaternionKeyframeTrack, boneName + '.quaternion',
							animationKeys, 'rot', tracks );

						addNonemptyTrack(
							VectorKeyframeTrack, boneName + '.scale',
							animationKeys, 'scl', tracks );

					}

				}

				if ( tracks.length === 0 ) {

					return null;

				}

				var clip = new AnimationClip( clipName, duration, tracks, blendMode );

				return clip;

			}

		} );

		Object.assign( AnimationClip.prototype, {

			resetDuration: function () {

				var tracks = this.tracks;
				var duration = 0;

				for ( var i = 0, n = tracks.length; i !== n; ++ i ) {

					var track = this.tracks[ i ];

					duration = Math.max( duration, track.times[ track.times.length - 1 ] );

				}

				this.duration = duration;

				return this;

			},

			trim: function () {

				for ( var i = 0; i < this.tracks.length; i ++ ) {

					this.tracks[ i ].trim( 0, this.duration );

				}

				return this;

			},

			validate: function () {

				var valid = true;

				for ( var i = 0; i < this.tracks.length; i ++ ) {

					valid = valid && this.tracks[ i ].validate();

				}

				return valid;

			},

			optimize: function () {

				for ( var i = 0; i < this.tracks.length; i ++ ) {

					this.tracks[ i ].optimize();

				}

				return this;

			},

			clone: function () {

				var tracks = [];

				for ( var i = 0; i < this.tracks.length; i ++ ) {

					tracks.push( this.tracks[ i ].clone() );

				}

				return new AnimationClip( this.name, this.duration, tracks, this.blendMode );

			}

		} );

		var Cache = {

			enabled: false,

			files: {},

			add: function ( key, file ) {

				if ( this.enabled === false ) { return; }

				// console.log( 'THREE.Cache', 'Adding key:', key );

				this.files[ key ] = file;

			},

			get: function ( key ) {

				if ( this.enabled === false ) { return; }

				// console.log( 'THREE.Cache', 'Checking key:', key );

				return this.files[ key ];

			},

			remove: function ( key ) {

				delete this.files[ key ];

			},

			clear: function () {

				this.files = {};

			}

		};

		function LoadingManager( onLoad, onProgress, onError ) {

			var scope = this;

			var isLoading = false;
			var itemsLoaded = 0;
			var itemsTotal = 0;
			var urlModifier = undefined;
			var handlers = [];

			// Refer to #5689 for the reason why we don't set .onStart
			// in the constructor

			this.onStart = undefined;
			this.onLoad = onLoad;
			this.onProgress = onProgress;
			this.onError = onError;

			this.itemStart = function ( url ) {

				itemsTotal ++;

				if ( isLoading === false ) {

					if ( scope.onStart !== undefined ) {

						scope.onStart( url, itemsLoaded, itemsTotal );

					}

				}

				isLoading = true;

			};

			this.itemEnd = function ( url ) {

				itemsLoaded ++;

				if ( scope.onProgress !== undefined ) {

					scope.onProgress( url, itemsLoaded, itemsTotal );

				}

				if ( itemsLoaded === itemsTotal ) {

					isLoading = false;

					if ( scope.onLoad !== undefined ) {

						scope.onLoad();

					}

				}

			};

			this.itemError = function ( url ) {

				if ( scope.onError !== undefined ) {

					scope.onError( url );

				}

			};

			this.resolveURL = function ( url ) {

				if ( urlModifier ) {

					return urlModifier( url );

				}

				return url;

			};

			this.setURLModifier = function ( transform ) {

				urlModifier = transform;

				return this;

			};

			this.addHandler = function ( regex, loader ) {

				handlers.push( regex, loader );

				return this;

			};

			this.removeHandler = function ( regex ) {

				var index = handlers.indexOf( regex );

				if ( index !== - 1 ) {

					handlers.splice( index, 2 );

				}

				return this;

			};

			this.getHandler = function ( file ) {

				for ( var i = 0, l = handlers.length; i < l; i += 2 ) {

					var regex = handlers[ i ];
					var loader = handlers[ i + 1 ];

					if ( regex.global ) { regex.lastIndex = 0; } // see #17920

					if ( regex.test( file ) ) {

						return loader;

					}

				}

				return null;

			};

		}

		var DefaultLoadingManager = new LoadingManager();

		function Loader( manager ) {

			this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;

			this.crossOrigin = 'anonymous';
			this.path = '';
			this.resourcePath = '';
			this.requestHeader = {};

		}

		Object.assign( Loader.prototype, {

			load: function ( /* url, onLoad, onProgress, onError */ ) {},

			loadAsync: function ( url, onProgress ) {

				var scope = this;

				return new Promise( function ( resolve, reject ) {

					scope.load( url, resolve, onProgress, reject );

				} );

			},

			parse: function ( /* data */ ) {},

			setCrossOrigin: function ( crossOrigin ) {

				this.crossOrigin = crossOrigin;
				return this;

			},

			setPath: function ( path ) {

				this.path = path;
				return this;

			},

			setResourcePath: function ( resourcePath ) {

				this.resourcePath = resourcePath;
				return this;

			},

			setRequestHeader: function ( requestHeader ) {

				this.requestHeader = requestHeader;
				return this;

			}

		} );

		var loading = {};

		function FileLoader( manager ) {

			Loader.call( this, manager );

		}

		FileLoader.prototype = Object.assign( Object.create( Loader.prototype ), {

			constructor: FileLoader,

			load: function ( url, onLoad, onProgress, onError ) {

				if ( url === undefined ) { url = ''; }

				if ( this.path !== undefined ) { url = this.path + url; }

				url = this.manager.resolveURL( url );

				var scope = this;

				var cached = Cache.get( url );

				if ( cached !== undefined ) {

					scope.manager.itemStart( url );

					setTimeout( function () {

						if ( onLoad ) { onLoad( cached ); }

						scope.manager.itemEnd( url );

					}, 0 );

					return cached;

				}

				// Check if request is duplicate

				if ( loading[ url ] !== undefined ) {

					loading[ url ].push( {

						onLoad: onLoad,
						onProgress: onProgress,
						onError: onError

					} );

					return;

				}

				// Check for data: URI
				var dataUriRegex = /^data:(.*?)(;base64)?,(.*)$/;
				var dataUriRegexResult = url.match( dataUriRegex );
				var request;

				// Safari can not handle Data URIs through XMLHttpRequest so process manually
				if ( dataUriRegexResult ) {

					var mimeType = dataUriRegexResult[ 1 ];
					var isBase64 = !! dataUriRegexResult[ 2 ];

					var data = dataUriRegexResult[ 3 ];
					data = decodeURIComponent( data );

					if ( isBase64 ) { data = atob( data ); }

					try {

						var response;
						var responseType = ( this.responseType || '' ).toLowerCase();

						switch ( responseType ) {

							case 'arraybuffer':
							case 'blob':

								var view = new Uint8Array( data.length );

								for ( var i = 0; i < data.length; i ++ ) {

									view[ i ] = data.charCodeAt( i );

								}

								if ( responseType === 'blob' ) {

									response = new Blob( [ view.buffer ], { type: mimeType } );

								} else {

									response = view.buffer;

								}

								break;

							case 'document':

								var parser = new DOMParser();
								response = parser.parseFromString( data, mimeType );

								break;

							case 'json':

								response = JSON.parse( data );

								break;

							default: // 'text' or other

								response = data;

								break;

						}

						// Wait for next browser tick like standard XMLHttpRequest event dispatching does
						setTimeout( function () {

							if ( onLoad ) { onLoad( response ); }

							scope.manager.itemEnd( url );

						}, 0 );

					} catch ( error ) {

						// Wait for next browser tick like standard XMLHttpRequest event dispatching does
						setTimeout( function () {

							if ( onError ) { onError( error ); }

							scope.manager.itemError( url );
							scope.manager.itemEnd( url );

						}, 0 );

					}

				} else {

					// Initialise array for duplicate requests

					loading[ url ] = [];

					loading[ url ].push( {

						onLoad: onLoad,
						onProgress: onProgress,
						onError: onError

					} );

					request = new XMLHttpRequest();

					request.open( 'GET', url, true );

					request.addEventListener( 'load', function ( event ) {

						var response = this.response;

						var callbacks = loading[ url ];

						delete loading[ url ];

						if ( this.status === 200 || this.status === 0 ) {

							// Some browsers return HTTP Status 0 when using non-http protocol
							// e.g. 'file://' or 'data://'. Handle as success.

							if ( this.status === 0 ) { console.warn( 'THREE.FileLoader: HTTP Status 0 received.' ); }

							// Add to cache only on HTTP success, so that we do not cache
							// error response bodies as proper responses to requests.
							Cache.add( url, response );

							for ( var i = 0, il = callbacks.length; i < il; i ++ ) {

								var callback = callbacks[ i ];
								if ( callback.onLoad ) { callback.onLoad( response ); }

							}

							scope.manager.itemEnd( url );

						} else {

							for ( var i$1 = 0, il$1 = callbacks.length; i$1 < il$1; i$1 ++ ) {

								var callback$1 = callbacks[ i$1 ];
								if ( callback$1.onError ) { callback$1.onError( event ); }

							}

							scope.manager.itemError( url );
							scope.manager.itemEnd( url );

						}

					}, false );

					request.addEventListener( 'progress', function ( event ) {

						var callbacks = loading[ url ];

						for ( var i = 0, il = callbacks.length; i < il; i ++ ) {

							var callback = callbacks[ i ];
							if ( callback.onProgress ) { callback.onProgress( event ); }

						}

					}, false );

					request.addEventListener( 'error', function ( event ) {

						var callbacks = loading[ url ];

						delete loading[ url ];

						for ( var i = 0, il = callbacks.length; i < il; i ++ ) {

							var callback = callbacks[ i ];
							if ( callback.onError ) { callback.onError( event ); }

						}

						scope.manager.itemError( url );
						scope.manager.itemEnd( url );

					}, false );

					request.addEventListener( 'abort', function ( event ) {

						var callbacks = loading[ url ];

						delete loading[ url ];

						for ( var i = 0, il = callbacks.length; i < il; i ++ ) {

							var callback = callbacks[ i ];
							if ( callback.onError ) { callback.onError( event ); }

						}

						scope.manager.itemError( url );
						scope.manager.itemEnd( url );

					}, false );

					if ( this.responseType !== undefined ) { request.responseType = this.responseType; }
					if ( this.withCredentials !== undefined ) { request.withCredentials = this.withCredentials; }

					if ( request.overrideMimeType ) { request.overrideMimeType( this.mimeType !== undefined ? this.mimeType : 'text/plain' ); }

					for ( var header in this.requestHeader ) {

						request.setRequestHeader( header, this.requestHeader[ header ] );

					}

					request.send( null );

				}

				scope.manager.itemStart( url );

				return request;

			},

			setResponseType: function ( value ) {

				this.responseType = value;
				return this;

			},

			setWithCredentials: function ( value ) {

				this.withCredentials = value;
				return this;

			},

			setMimeType: function ( value ) {

				this.mimeType = value;
				return this;

			}

		} );

		function AnimationLoader( manager ) {

			Loader.call( this, manager );

		}

		AnimationLoader.prototype = Object.assign( Object.create( Loader.prototype ), {

			constructor: AnimationLoader,

			load: function ( url, onLoad, onProgress, onError ) {

				var scope = this;

				var loader = new FileLoader( scope.manager );
				loader.setPath( scope.path );
				loader.setRequestHeader( scope.requestHeader );
				loader.load( url, function ( text ) {

					try {

						onLoad( scope.parse( JSON.parse( text ) ) );

					} catch ( e ) {

						if ( onError ) {

							onError( e );

						} else {

							console.error( e );

						}

						scope.manager.itemError( url );

					}

				}, onProgress, onError );

			},

			parse: function ( json ) {

				var animations = [];

				for ( var i = 0; i < json.length; i ++ ) {

					var clip = AnimationClip.parse( json[ i ] );

					animations.push( clip );

				}

				return animations;

			}

		} );

		/**
		 * Abstract Base class to block based textures loader (dds, pvr, ...)
		 *
		 * Sub classes have to implement the parse() method which will be used in load().
		 */

		function CompressedTextureLoader( manager ) {

			Loader.call( this, manager );

		}

		CompressedTextureLoader.prototype = Object.assign( Object.create( Loader.prototype ), {

			constructor: CompressedTextureLoader,

			load: function ( url, onLoad, onProgress, onError ) {

				var scope = this;

				var images = [];

				var texture = new CompressedTexture();
				texture.image = images;

				var loader = new FileLoader( this.manager );
				loader.setPath( this.path );
				loader.setResponseType( 'arraybuffer' );
				loader.setRequestHeader( this.requestHeader );

				var loaded = 0;

				function loadTexture( i ) {

					loader.load( url[ i ], function ( buffer ) {

						var texDatas = scope.parse( buffer, true );

						images[ i ] = {
							width: texDatas.width,
							height: texDatas.height,
							format: texDatas.format,
							mipmaps: texDatas.mipmaps
						};

						loaded += 1;

						if ( loaded === 6 ) {

							if ( texDatas.mipmapCount === 1 )
								{ texture.minFilter = LinearFilter; }

							texture.format = texDatas.format;
							texture.needsUpdate = true;

							if ( onLoad ) { onLoad( texture ); }

						}

					}, onProgress, onError );

				}

				if ( Array.isArray( url ) ) {

					for ( var i = 0, il = url.length; i < il; ++ i ) {

						loadTexture( i );

					}

				} else {

					// compressed cubemap texture stored in a single DDS file

					loader.load( url, function ( buffer ) {

						var texDatas = scope.parse( buffer, true );

						if ( texDatas.isCubemap ) {

							var faces = texDatas.mipmaps.length / texDatas.mipmapCount;

							for ( var f = 0; f < faces; f ++ ) {

								images[ f ] = { mipmaps: [] };

								for ( var i = 0; i < texDatas.mipmapCount; i ++ ) {

									images[ f ].mipmaps.push( texDatas.mipmaps[ f * texDatas.mipmapCount + i ] );
									images[ f ].format = texDatas.format;
									images[ f ].width = texDatas.width;
									images[ f ].height = texDatas.height;

								}

							}

						} else {

							texture.image.width = texDatas.width;
							texture.image.height = texDatas.height;
							texture.mipmaps = texDatas.mipmaps;

						}

						if ( texDatas.mipmapCount === 1 ) {

							texture.minFilter = LinearFilter;

						}

						texture.format = texDatas.format;
						texture.needsUpdate = true;

						if ( onLoad ) { onLoad( texture ); }

					}, onProgress, onError );

				}

				return texture;

			}

		} );

		function ImageLoader( manager ) {

			Loader.call( this, manager );

		}

		ImageLoader.prototype = Object.assign( Object.create( Loader.prototype ), {

			constructor: ImageLoader,

			load: function ( url, onLoad, onProgress, onError ) {

				if ( this.path !== undefined ) { url = this.path + url; }

				url = this.manager.resolveURL( url );

				var scope = this;

				var cached = Cache.get( url );

				if ( cached !== undefined ) {

					scope.manager.itemStart( url );

					setTimeout( function () {

						if ( onLoad ) { onLoad( cached ); }

						scope.manager.itemEnd( url );

					}, 0 );

					return cached;

				}

				var image = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'img' );

				function onImageLoad() {

					image.removeEventListener( 'load', onImageLoad, false );
					image.removeEventListener( 'error', onImageError, false );

					Cache.add( url, this );

					if ( onLoad ) { onLoad( this ); }

					scope.manager.itemEnd( url );

				}

				function onImageError( event ) {

					image.removeEventListener( 'load', onImageLoad, false );
					image.removeEventListener( 'error', onImageError, false );

					if ( onError ) { onError( event ); }

					scope.manager.itemError( url );
					scope.manager.itemEnd( url );

				}

				image.addEventListener( 'load', onImageLoad, false );
				image.addEventListener( 'error', onImageError, false );

				if ( url.substr( 0, 5 ) !== 'data:' ) {

					if ( this.crossOrigin !== undefined ) { image.crossOrigin = this.crossOrigin; }

				}

				scope.manager.itemStart( url );

				image.src = url;

				return image;

			}

		} );

		function CubeTextureLoader( manager ) {

			Loader.call( this, manager );

		}

		CubeTextureLoader.prototype = Object.assign( Object.create( Loader.prototype ), {

			constructor: CubeTextureLoader,

			load: function ( urls, onLoad, onProgress, onError ) {

				var texture = new CubeTexture();

				var loader = new ImageLoader( this.manager );
				loader.setCrossOrigin( this.crossOrigin );
				loader.setPath( this.path );

				var loaded = 0;

				function loadTexture( i ) {

					loader.load( urls[ i ], function ( image ) {

						texture.images[ i ] = image;

						loaded ++;

						if ( loaded === 6 ) {

							texture.needsUpdate = true;

							if ( onLoad ) { onLoad( texture ); }

						}

					}, undefined, onError );

				}

				for ( var i = 0; i < urls.length; ++ i ) {

					loadTexture( i );

				}

				return texture;

			}

		} );

		/**
		 * Abstract Base class to load generic binary textures formats (rgbe, hdr, ...)
		 *
		 * Sub classes have to implement the parse() method which will be used in load().
		 */

		function DataTextureLoader( manager ) {

			Loader.call( this, manager );

		}

		DataTextureLoader.prototype = Object.assign( Object.create( Loader.prototype ), {

			constructor: DataTextureLoader,

			load: function ( url, onLoad, onProgress, onError ) {

				var scope = this;

				var texture = new DataTexture();

				var loader = new FileLoader( this.manager );
				loader.setResponseType( 'arraybuffer' );
				loader.setRequestHeader( this.requestHeader );
				loader.setPath( this.path );
				loader.load( url, function ( buffer ) {

					var texData = scope.parse( buffer );

					if ( ! texData ) { return; }

					if ( texData.image !== undefined ) {

						texture.image = texData.image;

					} else if ( texData.data !== undefined ) {

						texture.image.width = texData.width;
						texture.image.height = texData.height;
						texture.image.data = texData.data;

					}

					texture.wrapS = texData.wrapS !== undefined ? texData.wrapS : ClampToEdgeWrapping;
					texture.wrapT = texData.wrapT !== undefined ? texData.wrapT : ClampToEdgeWrapping;

					texture.magFilter = texData.magFilter !== undefined ? texData.magFilter : LinearFilter;
					texture.minFilter = texData.minFilter !== undefined ? texData.minFilter : LinearFilter;

					texture.anisotropy = texData.anisotropy !== undefined ? texData.anisotropy : 1;

					if ( texData.format !== undefined ) {

						texture.format = texData.format;

					}

					if ( texData.type !== undefined ) {

						texture.type = texData.type;

					}

					if ( texData.mipmaps !== undefined ) {

						texture.mipmaps = texData.mipmaps;
						texture.minFilter = LinearMipmapLinearFilter; // presumably...

					}

					if ( texData.mipmapCount === 1 ) {

						texture.minFilter = LinearFilter;

					}

					texture.needsUpdate = true;

					if ( onLoad ) { onLoad( texture, texData ); }

				}, onProgress, onError );


				return texture;

			}

		} );

		function TextureLoader( manager ) {

			Loader.call( this, manager );

		}

		TextureLoader.prototype = Object.assign( Object.create( Loader.prototype ), {

			constructor: TextureLoader,

			load: function ( url, onLoad, onProgress, onError ) {

				var texture = new Texture();

				var loader = new ImageLoader( this.manager );
				loader.setCrossOrigin( this.crossOrigin );
				loader.setPath( this.path );

				loader.load( url, function ( image ) {

					texture.image = image;

					// JPEGs can't have an alpha channel, so memory can be saved by storing them as RGB.
					var isJPEG = url.search( /\.jpe?g($|\?)/i ) > 0 || url.search( /^data\:image\/jpeg/ ) === 0;

					texture.format = isJPEG ? RGBFormat : RGBAFormat;
					texture.needsUpdate = true;

					if ( onLoad !== undefined ) {

						onLoad( texture );

					}

				}, onProgress, onError );

				return texture;

			}

		} );

		/**
		 * Extensible curve object.
		 *
		 * Some common of curve methods:
		 * .getPoint( t, optionalTarget ), .getTangent( t, optionalTarget )
		 * .getPointAt( u, optionalTarget ), .getTangentAt( u, optionalTarget )
		 * .getPoints(), .getSpacedPoints()
		 * .getLength()
		 * .updateArcLengths()
		 *
		 * This following curves inherit from THREE.Curve:
		 *
		 * -- 2D curves --
		 * THREE.ArcCurve
		 * THREE.CubicBezierCurve
		 * THREE.EllipseCurve
		 * THREE.LineCurve
		 * THREE.QuadraticBezierCurve
		 * THREE.SplineCurve
		 *
		 * -- 3D curves --
		 * THREE.CatmullRomCurve3
		 * THREE.CubicBezierCurve3
		 * THREE.LineCurve3
		 * THREE.QuadraticBezierCurve3
		 *
		 * A series of curves can be represented as a THREE.CurvePath.
		 *
		 **/

		function Curve() {

			this.type = 'Curve';

			this.arcLengthDivisions = 200;

		}

		Object.assign( Curve.prototype, {

			// Virtual base class method to overwrite and implement in subclasses
			//	- t [0 .. 1]

			getPoint: function ( /* t, optionalTarget */ ) {

				console.warn( 'THREE.Curve: .getPoint() not implemented.' );
				return null;

			},

			// Get point at relative position in curve according to arc length
			// - u [0 .. 1]

			getPointAt: function ( u, optionalTarget ) {

				var t = this.getUtoTmapping( u );
				return this.getPoint( t, optionalTarget );

			},

			// Get sequence of points using getPoint( t )

			getPoints: function ( divisions ) {

				if ( divisions === undefined ) { divisions = 5; }

				var points = [];

				for ( var d = 0; d <= divisions; d ++ ) {

					points.push( this.getPoint( d / divisions ) );

				}

				return points;

			},

			// Get sequence of points using getPointAt( u )

			getSpacedPoints: function ( divisions ) {

				if ( divisions === undefined ) { divisions = 5; }

				var points = [];

				for ( var d = 0; d <= divisions; d ++ ) {

					points.push( this.getPointAt( d / divisions ) );

				}

				return points;

			},

			// Get total curve arc length

			getLength: function () {

				var lengths = this.getLengths();
				return lengths[ lengths.length - 1 ];

			},

			// Get list of cumulative segment lengths

			getLengths: function ( divisions ) {

				if ( divisions === undefined ) { divisions = this.arcLengthDivisions; }

				if ( this.cacheArcLengths &&
					( this.cacheArcLengths.length === divisions + 1 ) &&
					! this.needsUpdate ) {

					return this.cacheArcLengths;

				}

				this.needsUpdate = false;

				var cache = [];
				var current, last = this.getPoint( 0 );
				var sum = 0;

				cache.push( 0 );

				for ( var p = 1; p <= divisions; p ++ ) {

					current = this.getPoint( p / divisions );
					sum += current.distanceTo( last );
					cache.push( sum );
					last = current;

				}

				this.cacheArcLengths = cache;

				return cache; // { sums: cache, sum: sum }; Sum is in the last element.

			},

			updateArcLengths: function () {

				this.needsUpdate = true;
				this.getLengths();

			},

			// Given u ( 0 .. 1 ), get a t to find p. This gives you points which are equidistant

			getUtoTmapping: function ( u, distance ) {

				var arcLengths = this.getLengths();

				var i = 0;
				var il = arcLengths.length;

				var targetArcLength; // The targeted u distance value to get

				if ( distance ) {

					targetArcLength = distance;

				} else {

					targetArcLength = u * arcLengths[ il - 1 ];

				}

				// binary search for the index with largest value smaller than target u distance

				var low = 0, high = il - 1, comparison;

				while ( low <= high ) {

					i = Math.floor( low + ( high - low ) / 2 ); // less likely to overflow, though probably not issue here, JS doesn't really have integers, all numbers are floats

					comparison = arcLengths[ i ] - targetArcLength;

					if ( comparison < 0 ) {

						low = i + 1;

					} else if ( comparison > 0 ) {

						high = i - 1;

					} else {

						high = i;
						break;

						// DONE

					}

				}

				i = high;

				if ( arcLengths[ i ] === targetArcLength ) {

					return i / ( il - 1 );

				}

				// we could get finer grain at lengths, or use simple interpolation between two points

				var lengthBefore = arcLengths[ i ];
				var lengthAfter = arcLengths[ i + 1 ];

				var segmentLength = lengthAfter - lengthBefore;

				// determine where we are between the 'before' and 'after' points

				var segmentFraction = ( targetArcLength - lengthBefore ) / segmentLength;

				// add that fractional amount to t

				var t = ( i + segmentFraction ) / ( il - 1 );

				return t;

			},

			// Returns a unit vector tangent at t
			// In case any sub curve does not implement its tangent derivation,
			// 2 points a small delta apart will be used to find its gradient
			// which seems to give a reasonable approximation

			getTangent: function ( t, optionalTarget ) {

				var delta = 0.0001;
				var t1 = t - delta;
				var t2 = t + delta;

				// Capping in case of danger

				if ( t1 < 0 ) { t1 = 0; }
				if ( t2 > 1 ) { t2 = 1; }

				var pt1 = this.getPoint( t1 );
				var pt2 = this.getPoint( t2 );

				var tangent = optionalTarget || ( ( pt1.isVector2 ) ? new Vector2() : new Vector3() );

				tangent.copy( pt2 ).sub( pt1 ).normalize();

				return tangent;

			},

			getTangentAt: function ( u, optionalTarget ) {

				var t = this.getUtoTmapping( u );
				return this.getTangent( t, optionalTarget );

			},

			computeFrenetFrames: function ( segments, closed ) {

				// see http://www.cs.indiana.edu/pub/techreports/TR425.pdf

				var normal = new Vector3();

				var tangents = [];
				var normals = [];
				var binormals = [];

				var vec = new Vector3();
				var mat = new Matrix4();

				// compute the tangent vectors for each segment on the curve

				for ( var i = 0; i <= segments; i ++ ) {

					var u = i / segments;

					tangents[ i ] = this.getTangentAt( u, new Vector3() );
					tangents[ i ].normalize();

				}

				// select an initial normal vector perpendicular to the first tangent vector,
				// and in the direction of the minimum tangent xyz component

				normals[ 0 ] = new Vector3();
				binormals[ 0 ] = new Vector3();
				var min = Number.MAX_VALUE;
				var tx = Math.abs( tangents[ 0 ].x );
				var ty = Math.abs( tangents[ 0 ].y );
				var tz = Math.abs( tangents[ 0 ].z );

				if ( tx <= min ) {

					min = tx;
					normal.set( 1, 0, 0 );

				}

				if ( ty <= min ) {

					min = ty;
					normal.set( 0, 1, 0 );

				}

				if ( tz <= min ) {

					normal.set( 0, 0, 1 );

				}

				vec.crossVectors( tangents[ 0 ], normal ).normalize();

				normals[ 0 ].crossVectors( tangents[ 0 ], vec );
				binormals[ 0 ].crossVectors( tangents[ 0 ], normals[ 0 ] );


				// compute the slowly-varying normal and binormal vectors for each segment on the curve

				for ( var i$1 = 1; i$1 <= segments; i$1 ++ ) {

					normals[ i$1 ] = normals[ i$1 - 1 ].clone();

					binormals[ i$1 ] = binormals[ i$1 - 1 ].clone();

					vec.crossVectors( tangents[ i$1 - 1 ], tangents[ i$1 ] );

					if ( vec.length() > Number.EPSILON ) {

						vec.normalize();

						var theta = Math.acos( MathUtils.clamp( tangents[ i$1 - 1 ].dot( tangents[ i$1 ] ), - 1, 1 ) ); // clamp for floating pt errors

						normals[ i$1 ].applyMatrix4( mat.makeRotationAxis( vec, theta ) );

					}

					binormals[ i$1 ].crossVectors( tangents[ i$1 ], normals[ i$1 ] );

				}

				// if the curve is closed, postprocess the vectors so the first and last normal vectors are the same

				if ( closed === true ) {

					var theta$1 = Math.acos( MathUtils.clamp( normals[ 0 ].dot( normals[ segments ] ), - 1, 1 ) );
					theta$1 /= segments;

					if ( tangents[ 0 ].dot( vec.crossVectors( normals[ 0 ], normals[ segments ] ) ) > 0 ) {

						theta$1 = - theta$1;

					}

					for ( var i$2 = 1; i$2 <= segments; i$2 ++ ) {

						// twist a little...
						normals[ i$2 ].applyMatrix4( mat.makeRotationAxis( tangents[ i$2 ], theta$1 * i$2 ) );
						binormals[ i$2 ].crossVectors( tangents[ i$2 ], normals[ i$2 ] );

					}

				}

				return {
					tangents: tangents,
					normals: normals,
					binormals: binormals
				};

			},

			clone: function () {

				return new this.constructor().copy( this );

			},

			copy: function ( source ) {

				this.arcLengthDivisions = source.arcLengthDivisions;

				return this;

			},

			toJSON: function () {

				var data = {
					metadata: {
						version: 4.5,
						type: 'Curve',
						generator: 'Curve.toJSON'
					}
				};

				data.arcLengthDivisions = this.arcLengthDivisions;
				data.type = this.type;

				return data;

			},

			fromJSON: function ( json ) {

				this.arcLengthDivisions = json.arcLengthDivisions;

				return this;

			}

		} );

		function EllipseCurve( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {

			Curve.call( this );

			this.type = 'EllipseCurve';

			this.aX = aX || 0;
			this.aY = aY || 0;

			this.xRadius = xRadius || 1;
			this.yRadius = yRadius || 1;

			this.aStartAngle = aStartAngle || 0;
			this.aEndAngle = aEndAngle || 2 * Math.PI;

			this.aClockwise = aClockwise || false;

			this.aRotation = aRotation || 0;

		}

		EllipseCurve.prototype = Object.create( Curve.prototype );
		EllipseCurve.prototype.constructor = EllipseCurve;

		EllipseCurve.prototype.isEllipseCurve = true;

		EllipseCurve.prototype.getPoint = function ( t, optionalTarget ) {

			var point = optionalTarget || new Vector2();

			var twoPi = Math.PI * 2;
			var deltaAngle = this.aEndAngle - this.aStartAngle;
			var samePoints = Math.abs( deltaAngle ) < Number.EPSILON;

			// ensures that deltaAngle is 0 .. 2 PI
			while ( deltaAngle < 0 ) { deltaAngle += twoPi; }
			while ( deltaAngle > twoPi ) { deltaAngle -= twoPi; }

			if ( deltaAngle < Number.EPSILON ) {

				if ( samePoints ) {

					deltaAngle = 0;

				} else {

					deltaAngle = twoPi;

				}

			}

			if ( this.aClockwise === true && ! samePoints ) {

				if ( deltaAngle === twoPi ) {

					deltaAngle = - twoPi;

				} else {

					deltaAngle = deltaAngle - twoPi;

				}

			}

			var angle = this.aStartAngle + t * deltaAngle;
			var x = this.aX + this.xRadius * Math.cos( angle );
			var y = this.aY + this.yRadius * Math.sin( angle );

			if ( this.aRotation !== 0 ) {

				var cos = Math.cos( this.aRotation );
				var sin = Math.sin( this.aRotation );

				var tx = x - this.aX;
				var ty = y - this.aY;

				// Rotate the point about the center of the ellipse.
				x = tx * cos - ty * sin + this.aX;
				y = tx * sin + ty * cos + this.aY;

			}

			return point.set( x, y );

		};

		EllipseCurve.prototype.copy = function ( source ) {

			Curve.prototype.copy.call( this, source );

			this.aX = source.aX;
			this.aY = source.aY;

			this.xRadius = source.xRadius;
			this.yRadius = source.yRadius;

			this.aStartAngle = source.aStartAngle;
			this.aEndAngle = source.aEndAngle;

			this.aClockwise = source.aClockwise;

			this.aRotation = source.aRotation;

			return this;

		};


		EllipseCurve.prototype.toJSON = function () {

			var data = Curve.prototype.toJSON.call( this );

			data.aX = this.aX;
			data.aY = this.aY;

			data.xRadius = this.xRadius;
			data.yRadius = this.yRadius;

			data.aStartAngle = this.aStartAngle;
			data.aEndAngle = this.aEndAngle;

			data.aClockwise = this.aClockwise;

			data.aRotation = this.aRotation;

			return data;

		};

		EllipseCurve.prototype.fromJSON = function ( json ) {

			Curve.prototype.fromJSON.call( this, json );

			this.aX = json.aX;
			this.aY = json.aY;

			this.xRadius = json.xRadius;
			this.yRadius = json.yRadius;

			this.aStartAngle = json.aStartAngle;
			this.aEndAngle = json.aEndAngle;

			this.aClockwise = json.aClockwise;

			this.aRotation = json.aRotation;

			return this;

		};

		function ArcCurve( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {

			EllipseCurve.call( this, aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise );

			this.type = 'ArcCurve';

		}

		ArcCurve.prototype = Object.create( EllipseCurve.prototype );
		ArcCurve.prototype.constructor = ArcCurve;

		ArcCurve.prototype.isArcCurve = true;

		/**
		 * Centripetal CatmullRom Curve - which is useful for avoiding
		 * cusps and self-intersections in non-uniform catmull rom curves.
		 * http://www.cemyuksel.com/research/catmullrom_param/catmullrom.pdf
		 *
		 * curve.type accepts centripetal(default), chordal and catmullrom
		 * curve.tension is used for catmullrom which defaults to 0.5
		 */


		/*
		Based on an optimized c++ solution in
		 - http://stackoverflow.com/questions/9489736/catmull-rom-curve-with-no-cusps-and-no-self-intersections/
		 - http://ideone.com/NoEbVM

		This CubicPoly class could be used for reusing some variables and calculations,
		but for three.js curve use, it could be possible inlined and flatten into a single function call
		which can be placed in CurveUtils.
		*/

		function CubicPoly() {

			var c0 = 0, c1 = 0, c2 = 0, c3 = 0;

			/*
			 * Compute coefficients for a cubic polynomial
			 *   p(s) = c0 + c1*s + c2*s^2 + c3*s^3
			 * such that
			 *   p(0) = x0, p(1) = x1
			 *  and
			 *   p'(0) = t0, p'(1) = t1.
			 */
			function init( x0, x1, t0, t1 ) {

				c0 = x0;
				c1 = t0;
				c2 = - 3 * x0 + 3 * x1 - 2 * t0 - t1;
				c3 = 2 * x0 - 2 * x1 + t0 + t1;

			}

			return {

				initCatmullRom: function ( x0, x1, x2, x3, tension ) {

					init( x1, x2, tension * ( x2 - x0 ), tension * ( x3 - x1 ) );

				},

				initNonuniformCatmullRom: function ( x0, x1, x2, x3, dt0, dt1, dt2 ) {

					// compute tangents when parameterized in [t1,t2]
					var t1 = ( x1 - x0 ) / dt0 - ( x2 - x0 ) / ( dt0 + dt1 ) + ( x2 - x1 ) / dt1;
					var t2 = ( x2 - x1 ) / dt1 - ( x3 - x1 ) / ( dt1 + dt2 ) + ( x3 - x2 ) / dt2;

					// rescale tangents for parametrization in [0,1]
					t1 *= dt1;
					t2 *= dt1;

					init( x1, x2, t1, t2 );

				},

				calc: function ( t ) {

					var t2 = t * t;
					var t3 = t2 * t;
					return c0 + c1 * t + c2 * t2 + c3 * t3;

				}

			};

		}

		//

		var tmp = new Vector3();
		var px = new CubicPoly(), py = new CubicPoly(), pz = new CubicPoly();

		function CatmullRomCurve3( points, closed, curveType, tension ) {

			Curve.call( this );

			this.type = 'CatmullRomCurve3';

			this.points = points || [];
			this.closed = closed || false;
			this.curveType = curveType || 'centripetal';
			this.tension = ( tension !== undefined ) ? tension : 0.5;

		}

		CatmullRomCurve3.prototype = Object.create( Curve.prototype );
		CatmullRomCurve3.prototype.constructor = CatmullRomCurve3;

		CatmullRomCurve3.prototype.isCatmullRomCurve3 = true;

		CatmullRomCurve3.prototype.getPoint = function ( t, optionalTarget ) {

			var point = optionalTarget || new Vector3();

			var points = this.points;
			var l = points.length;

			var p = ( l - ( this.closed ? 0 : 1 ) ) * t;
			var intPoint = Math.floor( p );
			var weight = p - intPoint;

			if ( this.closed ) {

				intPoint += intPoint > 0 ? 0 : ( Math.floor( Math.abs( intPoint ) / l ) + 1 ) * l;

			} else if ( weight === 0 && intPoint === l - 1 ) {

				intPoint = l - 2;
				weight = 1;

			}

			var p0, p3; // 4 points (p1 & p2 defined below)

			if ( this.closed || intPoint > 0 ) {

				p0 = points[ ( intPoint - 1 ) % l ];

			} else {

				// extrapolate first point
				tmp.subVectors( points[ 0 ], points[ 1 ] ).add( points[ 0 ] );
				p0 = tmp;

			}

			var p1 = points[ intPoint % l ];
			var p2 = points[ ( intPoint + 1 ) % l ];

			if ( this.closed || intPoint + 2 < l ) {

				p3 = points[ ( intPoint + 2 ) % l ];

			} else {

				// extrapolate last point
				tmp.subVectors( points[ l - 1 ], points[ l - 2 ] ).add( points[ l - 1 ] );
				p3 = tmp;

			}

			if ( this.curveType === 'centripetal' || this.curveType === 'chordal' ) {

				// init Centripetal / Chordal Catmull-Rom
				var pow = this.curveType === 'chordal' ? 0.5 : 0.25;
				var dt0 = Math.pow( p0.distanceToSquared( p1 ), pow );
				var dt1 = Math.pow( p1.distanceToSquared( p2 ), pow );
				var dt2 = Math.pow( p2.distanceToSquared( p3 ), pow );

				// safety check for repeated points
				if ( dt1 < 1e-4 ) { dt1 = 1.0; }
				if ( dt0 < 1e-4 ) { dt0 = dt1; }
				if ( dt2 < 1e-4 ) { dt2 = dt1; }

				px.initNonuniformCatmullRom( p0.x, p1.x, p2.x, p3.x, dt0, dt1, dt2 );
				py.initNonuniformCatmullRom( p0.y, p1.y, p2.y, p3.y, dt0, dt1, dt2 );
				pz.initNonuniformCatmullRom( p0.z, p1.z, p2.z, p3.z, dt0, dt1, dt2 );

			} else if ( this.curveType === 'catmullrom' ) {

				px.initCatmullRom( p0.x, p1.x, p2.x, p3.x, this.tension );
				py.initCatmullRom( p0.y, p1.y, p2.y, p3.y, this.tension );
				pz.initCatmullRom( p0.z, p1.z, p2.z, p3.z, this.tension );

			}

			point.set(
				px.calc( weight ),
				py.calc( weight ),
				pz.calc( weight )
			);

			return point;

		};

		CatmullRomCurve3.prototype.copy = function ( source ) {

			Curve.prototype.copy.call( this, source );

			this.points = [];

			for ( var i = 0, l = source.points.length; i < l; i ++ ) {

				var point = source.points[ i ];

				this.points.push( point.clone() );

			}

			this.closed = source.closed;
			this.curveType = source.curveType;
			this.tension = source.tension;

			return this;

		};

		CatmullRomCurve3.prototype.toJSON = function () {

			var data = Curve.prototype.toJSON.call( this );

			data.points = [];

			for ( var i = 0, l = this.points.length; i < l; i ++ ) {

				var point = this.points[ i ];
				data.points.push( point.toArray() );

			}

			data.closed = this.closed;
			data.curveType = this.curveType;
			data.tension = this.tension;

			return data;

		};

		CatmullRomCurve3.prototype.fromJSON = function ( json ) {

			Curve.prototype.fromJSON.call( this, json );

			this.points = [];

			for ( var i = 0, l = json.points.length; i < l; i ++ ) {

				var point = json.points[ i ];
				this.points.push( new Vector3().fromArray( point ) );

			}

			this.closed = json.closed;
			this.curveType = json.curveType;
			this.tension = json.tension;

			return this;

		};

		/**
		 * Bezier Curves formulas obtained from
		 * http://en.wikipedia.org/wiki/Bézier_curve
		 */

		function CatmullRom( t, p0, p1, p2, p3 ) {

			var v0 = ( p2 - p0 ) * 0.5;
			var v1 = ( p3 - p1 ) * 0.5;
			var t2 = t * t;
			var t3 = t * t2;
			return ( 2 * p1 - 2 * p2 + v0 + v1 ) * t3 + ( - 3 * p1 + 3 * p2 - 2 * v0 - v1 ) * t2 + v0 * t + p1;

		}

		//

		function QuadraticBezierP0( t, p ) {

			var k = 1 - t;
			return k * k * p;

		}

		function QuadraticBezierP1( t, p ) {

			return 2 * ( 1 - t ) * t * p;

		}

		function QuadraticBezierP2( t, p ) {

			return t * t * p;

		}

		function QuadraticBezier( t, p0, p1, p2 ) {

			return QuadraticBezierP0( t, p0 ) + QuadraticBezierP1( t, p1 ) +
				QuadraticBezierP2( t, p2 );

		}

		//

		function CubicBezierP0( t, p ) {

			var k = 1 - t;
			return k * k * k * p;

		}

		function CubicBezierP1( t, p ) {

			var k = 1 - t;
			return 3 * k * k * t * p;

		}

		function CubicBezierP2( t, p ) {

			return 3 * ( 1 - t ) * t * t * p;

		}

		function CubicBezierP3( t, p ) {

			return t * t * t * p;

		}

		function CubicBezier( t, p0, p1, p2, p3 ) {

			return CubicBezierP0( t, p0 ) + CubicBezierP1( t, p1 ) + CubicBezierP2( t, p2 ) +
				CubicBezierP3( t, p3 );

		}

		function CubicBezierCurve( v0, v1, v2, v3 ) {

			Curve.call( this );

			this.type = 'CubicBezierCurve';

			this.v0 = v0 || new Vector2();
			this.v1 = v1 || new Vector2();
			this.v2 = v2 || new Vector2();
			this.v3 = v3 || new Vector2();

		}

		CubicBezierCurve.prototype = Object.create( Curve.prototype );
		CubicBezierCurve.prototype.constructor = CubicBezierCurve;

		CubicBezierCurve.prototype.isCubicBezierCurve = true;

		CubicBezierCurve.prototype.getPoint = function ( t, optionalTarget ) {

			var point = optionalTarget || new Vector2();

			var v0 = this.v0, v1 = this.v1, v2 = this.v2, v3 = this.v3;

			point.set(
				CubicBezier( t, v0.x, v1.x, v2.x, v3.x ),
				CubicBezier( t, v0.y, v1.y, v2.y, v3.y )
			);

			return point;

		};

		CubicBezierCurve.prototype.copy = function ( source ) {

			Curve.prototype.copy.call( this, source );

			this.v0.copy( source.v0 );
			this.v1.copy( source.v1 );
			this.v2.copy( source.v2 );
			this.v3.copy( source.v3 );

			return this;

		};

		CubicBezierCurve.prototype.toJSON = function () {

			var data = Curve.prototype.toJSON.call( this );

			data.v0 = this.v0.toArray();
			data.v1 = this.v1.toArray();
			data.v2 = this.v2.toArray();
			data.v3 = this.v3.toArray();

			return data;

		};

		CubicBezierCurve.prototype.fromJSON = function ( json ) {

			Curve.prototype.fromJSON.call( this, json );

			this.v0.fromArray( json.v0 );
			this.v1.fromArray( json.v1 );
			this.v2.fromArray( json.v2 );
			this.v3.fromArray( json.v3 );

			return this;

		};

		function CubicBezierCurve3( v0, v1, v2, v3 ) {

			Curve.call( this );

			this.type = 'CubicBezierCurve3';

			this.v0 = v0 || new Vector3();
			this.v1 = v1 || new Vector3();
			this.v2 = v2 || new Vector3();
			this.v3 = v3 || new Vector3();

		}

		CubicBezierCurve3.prototype = Object.create( Curve.prototype );
		CubicBezierCurve3.prototype.constructor = CubicBezierCurve3;

		CubicBezierCurve3.prototype.isCubicBezierCurve3 = true;

		CubicBezierCurve3.prototype.getPoint = function ( t, optionalTarget ) {

			var point = optionalTarget || new Vector3();

			var v0 = this.v0, v1 = this.v1, v2 = this.v2, v3 = this.v3;

			point.set(
				CubicBezier( t, v0.x, v1.x, v2.x, v3.x ),
				CubicBezier( t, v0.y, v1.y, v2.y, v3.y ),
				CubicBezier( t, v0.z, v1.z, v2.z, v3.z )
			);

			return point;

		};

		CubicBezierCurve3.prototype.copy = function ( source ) {

			Curve.prototype.copy.call( this, source );

			this.v0.copy( source.v0 );
			this.v1.copy( source.v1 );
			this.v2.copy( source.v2 );
			this.v3.copy( source.v3 );

			return this;

		};

		CubicBezierCurve3.prototype.toJSON = function () {

			var data = Curve.prototype.toJSON.call( this );

			data.v0 = this.v0.toArray();
			data.v1 = this.v1.toArray();
			data.v2 = this.v2.toArray();
			data.v3 = this.v3.toArray();

			return data;

		};

		CubicBezierCurve3.prototype.fromJSON = function ( json ) {

			Curve.prototype.fromJSON.call( this, json );

			this.v0.fromArray( json.v0 );
			this.v1.fromArray( json.v1 );
			this.v2.fromArray( json.v2 );
			this.v3.fromArray( json.v3 );

			return this;

		};

		function LineCurve( v1, v2 ) {

			Curve.call( this );

			this.type = 'LineCurve';

			this.v1 = v1 || new Vector2();
			this.v2 = v2 || new Vector2();

		}

		LineCurve.prototype = Object.create( Curve.prototype );
		LineCurve.prototype.constructor = LineCurve;

		LineCurve.prototype.isLineCurve = true;

		LineCurve.prototype.getPoint = function ( t, optionalTarget ) {

			var point = optionalTarget || new Vector2();

			if ( t === 1 ) {

				point.copy( this.v2 );

			} else {

				point.copy( this.v2 ).sub( this.v1 );
				point.multiplyScalar( t ).add( this.v1 );

			}

			return point;

		};

		// Line curve is linear, so we can overwrite default getPointAt

		LineCurve.prototype.getPointAt = function ( u, optionalTarget ) {

			return this.getPoint( u, optionalTarget );

		};

		LineCurve.prototype.getTangent = function ( t, optionalTarget ) {

			var tangent = optionalTarget || new Vector2();

			tangent.copy( this.v2 ).sub( this.v1 ).normalize();

			return tangent;

		};

		LineCurve.prototype.copy = function ( source ) {

			Curve.prototype.copy.call( this, source );

			this.v1.copy( source.v1 );
			this.v2.copy( source.v2 );

			return this;

		};

		LineCurve.prototype.toJSON = function () {

			var data = Curve.prototype.toJSON.call( this );

			data.v1 = this.v1.toArray();
			data.v2 = this.v2.toArray();

			return data;

		};

		LineCurve.prototype.fromJSON = function ( json ) {

			Curve.prototype.fromJSON.call( this, json );

			this.v1.fromArray( json.v1 );
			this.v2.fromArray( json.v2 );

			return this;

		};

		function LineCurve3( v1, v2 ) {

			Curve.call( this );

			this.type = 'LineCurve3';

			this.v1 = v1 || new Vector3();
			this.v2 = v2 || new Vector3();

		}

		LineCurve3.prototype = Object.create( Curve.prototype );
		LineCurve3.prototype.constructor = LineCurve3;

		LineCurve3.prototype.isLineCurve3 = true;

		LineCurve3.prototype.getPoint = function ( t, optionalTarget ) {

			var point = optionalTarget || new Vector3();

			if ( t === 1 ) {

				point.copy( this.v2 );

			} else {

				point.copy( this.v2 ).sub( this.v1 );
				point.multiplyScalar( t ).add( this.v1 );

			}

			return point;

		};

		// Line curve is linear, so we can overwrite default getPointAt

		LineCurve3.prototype.getPointAt = function ( u, optionalTarget ) {

			return this.getPoint( u, optionalTarget );

		};

		LineCurve3.prototype.copy = function ( source ) {

			Curve.prototype.copy.call( this, source );

			this.v1.copy( source.v1 );
			this.v2.copy( source.v2 );

			return this;

		};

		LineCurve3.prototype.toJSON = function () {

			var data = Curve.prototype.toJSON.call( this );

			data.v1 = this.v1.toArray();
			data.v2 = this.v2.toArray();

			return data;

		};

		LineCurve3.prototype.fromJSON = function ( json ) {

			Curve.prototype.fromJSON.call( this, json );

			this.v1.fromArray( json.v1 );
			this.v2.fromArray( json.v2 );

			return this;

		};

		function QuadraticBezierCurve( v0, v1, v2 ) {

			Curve.call( this );

			this.type = 'QuadraticBezierCurve';

			this.v0 = v0 || new Vector2();
			this.v1 = v1 || new Vector2();
			this.v2 = v2 || new Vector2();

		}

		QuadraticBezierCurve.prototype = Object.create( Curve.prototype );
		QuadraticBezierCurve.prototype.constructor = QuadraticBezierCurve;

		QuadraticBezierCurve.prototype.isQuadraticBezierCurve = true;

		QuadraticBezierCurve.prototype.getPoint = function ( t, optionalTarget ) {

			var point = optionalTarget || new Vector2();

			var v0 = this.v0, v1 = this.v1, v2 = this.v2;

			point.set(
				QuadraticBezier( t, v0.x, v1.x, v2.x ),
				QuadraticBezier( t, v0.y, v1.y, v2.y )
			);

			return point;

		};

		QuadraticBezierCurve.prototype.copy = function ( source ) {

			Curve.prototype.copy.call( this, source );

			this.v0.copy( source.v0 );
			this.v1.copy( source.v1 );
			this.v2.copy( source.v2 );

			return this;

		};

		QuadraticBezierCurve.prototype.toJSON = function () {

			var data = Curve.prototype.toJSON.call( this );

			data.v0 = this.v0.toArray();
			data.v1 = this.v1.toArray();
			data.v2 = this.v2.toArray();

			return data;

		};

		QuadraticBezierCurve.prototype.fromJSON = function ( json ) {

			Curve.prototype.fromJSON.call( this, json );

			this.v0.fromArray( json.v0 );
			this.v1.fromArray( json.v1 );
			this.v2.fromArray( json.v2 );

			return this;

		};

		function QuadraticBezierCurve3( v0, v1, v2 ) {

			Curve.call( this );

			this.type = 'QuadraticBezierCurve3';

			this.v0 = v0 || new Vector3();
			this.v1 = v1 || new Vector3();
			this.v2 = v2 || new Vector3();

		}

		QuadraticBezierCurve3.prototype = Object.create( Curve.prototype );
		QuadraticBezierCurve3.prototype.constructor = QuadraticBezierCurve3;

		QuadraticBezierCurve3.prototype.isQuadraticBezierCurve3 = true;

		QuadraticBezierCurve3.prototype.getPoint = function ( t, optionalTarget ) {

			var point = optionalTarget || new Vector3();

			var v0 = this.v0, v1 = this.v1, v2 = this.v2;

			point.set(
				QuadraticBezier( t, v0.x, v1.x, v2.x ),
				QuadraticBezier( t, v0.y, v1.y, v2.y ),
				QuadraticBezier( t, v0.z, v1.z, v2.z )
			);

			return point;

		};

		QuadraticBezierCurve3.prototype.copy = function ( source ) {

			Curve.prototype.copy.call( this, source );

			this.v0.copy( source.v0 );
			this.v1.copy( source.v1 );
			this.v2.copy( source.v2 );

			return this;

		};

		QuadraticBezierCurve3.prototype.toJSON = function () {

			var data = Curve.prototype.toJSON.call( this );

			data.v0 = this.v0.toArray();
			data.v1 = this.v1.toArray();
			data.v2 = this.v2.toArray();

			return data;

		};

		QuadraticBezierCurve3.prototype.fromJSON = function ( json ) {

			Curve.prototype.fromJSON.call( this, json );

			this.v0.fromArray( json.v0 );
			this.v1.fromArray( json.v1 );
			this.v2.fromArray( json.v2 );

			return this;

		};

		function SplineCurve( points ) {

			Curve.call( this );

			this.type = 'SplineCurve';

			this.points = points || [];

		}

		SplineCurve.prototype = Object.create( Curve.prototype );
		SplineCurve.prototype.constructor = SplineCurve;

		SplineCurve.prototype.isSplineCurve = true;

		SplineCurve.prototype.getPoint = function ( t, optionalTarget ) {

			var point = optionalTarget || new Vector2();

			var points = this.points;
			var p = ( points.length - 1 ) * t;

			var intPoint = Math.floor( p );
			var weight = p - intPoint;

			var p0 = points[ intPoint === 0 ? intPoint : intPoint - 1 ];
			var p1 = points[ intPoint ];
			var p2 = points[ intPoint > points.length - 2 ? points.length - 1 : intPoint + 1 ];
			var p3 = points[ intPoint > points.length - 3 ? points.length - 1 : intPoint + 2 ];

			point.set(
				CatmullRom( weight, p0.x, p1.x, p2.x, p3.x ),
				CatmullRom( weight, p0.y, p1.y, p2.y, p3.y )
			);

			return point;

		};

		SplineCurve.prototype.copy = function ( source ) {

			Curve.prototype.copy.call( this, source );

			this.points = [];

			for ( var i = 0, l = source.points.length; i < l; i ++ ) {

				var point = source.points[ i ];

				this.points.push( point.clone() );

			}

			return this;

		};

		SplineCurve.prototype.toJSON = function () {

			var data = Curve.prototype.toJSON.call( this );

			data.points = [];

			for ( var i = 0, l = this.points.length; i < l; i ++ ) {

				var point = this.points[ i ];
				data.points.push( point.toArray() );

			}

			return data;

		};

		SplineCurve.prototype.fromJSON = function ( json ) {

			Curve.prototype.fromJSON.call( this, json );

			this.points = [];

			for ( var i = 0, l = json.points.length; i < l; i ++ ) {

				var point = json.points[ i ];
				this.points.push( new Vector2().fromArray( point ) );

			}

			return this;

		};

		var Curves = /*#__PURE__*/Object.freeze({
			__proto__: null,
			ArcCurve: ArcCurve,
			CatmullRomCurve3: CatmullRomCurve3,
			CubicBezierCurve: CubicBezierCurve,
			CubicBezierCurve3: CubicBezierCurve3,
			EllipseCurve: EllipseCurve,
			LineCurve: LineCurve,
			LineCurve3: LineCurve3,
			QuadraticBezierCurve: QuadraticBezierCurve,
			QuadraticBezierCurve3: QuadraticBezierCurve3,
			SplineCurve: SplineCurve
		});

		/**************************************************************
		 *	Curved Path - a curve path is simply a array of connected
		 *  curves, but retains the api of a curve
		 **************************************************************/

		function CurvePath() {

			Curve.call( this );

			this.type = 'CurvePath';

			this.curves = [];
			this.autoClose = false; // Automatically closes the path

		}

		CurvePath.prototype = Object.assign( Object.create( Curve.prototype ), {

			constructor: CurvePath,

			add: function ( curve ) {

				this.curves.push( curve );

			},

			closePath: function () {

				// Add a line curve if start and end of lines are not connected
				var startPoint = this.curves[ 0 ].getPoint( 0 );
				var endPoint = this.curves[ this.curves.length - 1 ].getPoint( 1 );

				if ( ! startPoint.equals( endPoint ) ) {

					this.curves.push( new LineCurve( endPoint, startPoint ) );

				}

			},

			// To get accurate point with reference to
			// entire path distance at time t,
			// following has to be done:

			// 1. Length of each sub path have to be known
			// 2. Locate and identify type of curve
			// 3. Get t for the curve
			// 4. Return curve.getPointAt(t')

			getPoint: function ( t ) {

				var d = t * this.getLength();
				var curveLengths = this.getCurveLengths();
				var i = 0;

				// To think about boundaries points.

				while ( i < curveLengths.length ) {

					if ( curveLengths[ i ] >= d ) {

						var diff = curveLengths[ i ] - d;
						var curve = this.curves[ i ];

						var segmentLength = curve.getLength();
						var u = segmentLength === 0 ? 0 : 1 - diff / segmentLength;

						return curve.getPointAt( u );

					}

					i ++;

				}

				return null;

				// loop where sum != 0, sum > d , sum+1 <d

			},

			// We cannot use the default THREE.Curve getPoint() with getLength() because in
			// THREE.Curve, getLength() depends on getPoint() but in THREE.CurvePath
			// getPoint() depends on getLength

			getLength: function () {

				var lens = this.getCurveLengths();
				return lens[ lens.length - 1 ];

			},

			// cacheLengths must be recalculated.
			updateArcLengths: function () {

				this.needsUpdate = true;
				this.cacheLengths = null;
				this.getCurveLengths();

			},

			// Compute lengths and cache them
			// We cannot overwrite getLengths() because UtoT mapping uses it.

			getCurveLengths: function () {

				// We use cache values if curves and cache array are same length

				if ( this.cacheLengths && this.cacheLengths.length === this.curves.length ) {

					return this.cacheLengths;

				}

				// Get length of sub-curve
				// Push sums into cached array

				var lengths = [];
				var sums = 0;

				for ( var i = 0, l = this.curves.length; i < l; i ++ ) {

					sums += this.curves[ i ].getLength();
					lengths.push( sums );

				}

				this.cacheLengths = lengths;

				return lengths;

			},

			getSpacedPoints: function ( divisions ) {

				if ( divisions === undefined ) { divisions = 40; }

				var points = [];

				for ( var i = 0; i <= divisions; i ++ ) {

					points.push( this.getPoint( i / divisions ) );

				}

				if ( this.autoClose ) {

					points.push( points[ 0 ] );

				}

				return points;

			},

			getPoints: function ( divisions ) {

				divisions = divisions || 12;

				var points = [];
				var last;

				for ( var i = 0, curves = this.curves; i < curves.length; i ++ ) {

					var curve = curves[ i ];
					var resolution = ( curve && curve.isEllipseCurve ) ? divisions * 2
						: ( curve && ( curve.isLineCurve || curve.isLineCurve3 ) ) ? 1
							: ( curve && curve.isSplineCurve ) ? divisions * curve.points.length
								: divisions;

					var pts = curve.getPoints( resolution );

					for ( var j = 0; j < pts.length; j ++ ) {

						var point = pts[ j ];

						if ( last && last.equals( point ) ) { continue; } // ensures no consecutive points are duplicates

						points.push( point );
						last = point;

					}

				}

				if ( this.autoClose && points.length > 1 && ! points[ points.length - 1 ].equals( points[ 0 ] ) ) {

					points.push( points[ 0 ] );

				}

				return points;

			},

			copy: function ( source ) {

				Curve.prototype.copy.call( this, source );

				this.curves = [];

				for ( var i = 0, l = source.curves.length; i < l; i ++ ) {

					var curve = source.curves[ i ];

					this.curves.push( curve.clone() );

				}

				this.autoClose = source.autoClose;

				return this;

			},

			toJSON: function () {

				var data = Curve.prototype.toJSON.call( this );

				data.autoClose = this.autoClose;
				data.curves = [];

				for ( var i = 0, l = this.curves.length; i < l; i ++ ) {

					var curve = this.curves[ i ];
					data.curves.push( curve.toJSON() );

				}

				return data;

			},

			fromJSON: function ( json ) {

				Curve.prototype.fromJSON.call( this, json );

				this.autoClose = json.autoClose;
				this.curves = [];

				for ( var i = 0, l = json.curves.length; i < l; i ++ ) {

					var curve = json.curves[ i ];
					this.curves.push( new Curves[ curve.type ]().fromJSON( curve ) );

				}

				return this;

			}

		} );

		function Path( points ) {

			CurvePath.call( this );

			this.type = 'Path';

			this.currentPoint = new Vector2();

			if ( points ) {

				this.setFromPoints( points );

			}

		}

		Path.prototype = Object.assign( Object.create( CurvePath.prototype ), {

			constructor: Path,

			setFromPoints: function ( points ) {

				this.moveTo( points[ 0 ].x, points[ 0 ].y );

				for ( var i = 1, l = points.length; i < l; i ++ ) {

					this.lineTo( points[ i ].x, points[ i ].y );

				}

				return this;

			},

			moveTo: function ( x, y ) {

				this.currentPoint.set( x, y ); // TODO consider referencing vectors instead of copying?

				return this;

			},

			lineTo: function ( x, y ) {

				var curve = new LineCurve( this.currentPoint.clone(), new Vector2( x, y ) );
				this.curves.push( curve );

				this.currentPoint.set( x, y );

				return this;

			},

			quadraticCurveTo: function ( aCPx, aCPy, aX, aY ) {

				var curve = new QuadraticBezierCurve(
					this.currentPoint.clone(),
					new Vector2( aCPx, aCPy ),
					new Vector2( aX, aY )
				);

				this.curves.push( curve );

				this.currentPoint.set( aX, aY );

				return this;

			},

			bezierCurveTo: function ( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY ) {

				var curve = new CubicBezierCurve(
					this.currentPoint.clone(),
					new Vector2( aCP1x, aCP1y ),
					new Vector2( aCP2x, aCP2y ),
					new Vector2( aX, aY )
				);

				this.curves.push( curve );

				this.currentPoint.set( aX, aY );

				return this;

			},

			splineThru: function ( pts /*Array of Vector*/ ) {

				var npts = [ this.currentPoint.clone() ].concat( pts );

				var curve = new SplineCurve( npts );
				this.curves.push( curve );

				this.currentPoint.copy( pts[ pts.length - 1 ] );

				return this;

			},

			arc: function ( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {

				var x0 = this.currentPoint.x;
				var y0 = this.currentPoint.y;

				this.absarc( aX + x0, aY + y0, aRadius,
					aStartAngle, aEndAngle, aClockwise );

				return this;

			},

			absarc: function ( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {

				this.absellipse( aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise );

				return this;

			},

			ellipse: function ( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {

				var x0 = this.currentPoint.x;
				var y0 = this.currentPoint.y;

				this.absellipse( aX + x0, aY + y0, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation );

				return this;

			},

			absellipse: function ( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {

				var curve = new EllipseCurve( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation );

				if ( this.curves.length > 0 ) {

					// if a previous curve is present, attempt to join
					var firstPoint = curve.getPoint( 0 );

					if ( ! firstPoint.equals( this.currentPoint ) ) {

						this.lineTo( firstPoint.x, firstPoint.y );

					}

				}

				this.curves.push( curve );

				var lastPoint = curve.getPoint( 1 );
				this.currentPoint.copy( lastPoint );

				return this;

			},

			copy: function ( source ) {

				CurvePath.prototype.copy.call( this, source );

				this.currentPoint.copy( source.currentPoint );

				return this;

			},

			toJSON: function () {

				var data = CurvePath.prototype.toJSON.call( this );

				data.currentPoint = this.currentPoint.toArray();

				return data;

			},

			fromJSON: function ( json ) {

				CurvePath.prototype.fromJSON.call( this, json );

				this.currentPoint.fromArray( json.currentPoint );

				return this;

			}

		} );

		function Shape( points ) {

			Path.call( this, points );

			this.uuid = MathUtils.generateUUID();

			this.type = 'Shape';

			this.holes = [];

		}

		Shape.prototype = Object.assign( Object.create( Path.prototype ), {

			constructor: Shape,

			getPointsHoles: function ( divisions ) {

				var holesPts = [];

				for ( var i = 0, l = this.holes.length; i < l; i ++ ) {

					holesPts[ i ] = this.holes[ i ].getPoints( divisions );

				}

				return holesPts;

			},

			// get points of shape and holes (keypoints based on segments parameter)

			extractPoints: function ( divisions ) {

				return {

					shape: this.getPoints( divisions ),
					holes: this.getPointsHoles( divisions )

				};

			},

			copy: function ( source ) {

				Path.prototype.copy.call( this, source );

				this.holes = [];

				for ( var i = 0, l = source.holes.length; i < l; i ++ ) {

					var hole = source.holes[ i ];

					this.holes.push( hole.clone() );

				}

				return this;

			},

			toJSON: function () {

				var data = Path.prototype.toJSON.call( this );

				data.uuid = this.uuid;
				data.holes = [];

				for ( var i = 0, l = this.holes.length; i < l; i ++ ) {

					var hole = this.holes[ i ];
					data.holes.push( hole.toJSON() );

				}

				return data;

			},

			fromJSON: function ( json ) {

				Path.prototype.fromJSON.call( this, json );

				this.uuid = json.uuid;
				this.holes = [];

				for ( var i = 0, l = json.holes.length; i < l; i ++ ) {

					var hole = json.holes[ i ];
					this.holes.push( new Path().fromJSON( hole ) );

				}

				return this;

			}

		} );

		function Light( color, intensity ) {

			Object3D.call( this );

			this.type = 'Light';

			this.color = new Color( color );
			this.intensity = intensity !== undefined ? intensity : 1;

			this.receiveShadow = undefined;

		}

		Light.prototype = Object.assign( Object.create( Object3D.prototype ), {

			constructor: Light,

			isLight: true,

			copy: function ( source ) {

				Object3D.prototype.copy.call( this, source );

				this.color.copy( source.color );
				this.intensity = source.intensity;

				return this;

			},

			toJSON: function ( meta ) {

				var data = Object3D.prototype.toJSON.call( this, meta );

				data.object.color = this.color.getHex();
				data.object.intensity = this.intensity;

				if ( this.groundColor !== undefined ) { data.object.groundColor = this.groundColor.getHex(); }

				if ( this.distance !== undefined ) { data.object.distance = this.distance; }
				if ( this.angle !== undefined ) { data.object.angle = this.angle; }
				if ( this.decay !== undefined ) { data.object.decay = this.decay; }
				if ( this.penumbra !== undefined ) { data.object.penumbra = this.penumbra; }

				if ( this.shadow !== undefined ) { data.object.shadow = this.shadow.toJSON(); }

				return data;

			}

		} );

		function HemisphereLight( skyColor, groundColor, intensity ) {

			Light.call( this, skyColor, intensity );

			this.type = 'HemisphereLight';

			this.castShadow = undefined;

			this.position.copy( Object3D.DefaultUp );
			this.updateMatrix();

			this.groundColor = new Color( groundColor );

		}

		HemisphereLight.prototype = Object.assign( Object.create( Light.prototype ), {

			constructor: HemisphereLight,

			isHemisphereLight: true,

			copy: function ( source ) {

				Light.prototype.copy.call( this, source );

				this.groundColor.copy( source.groundColor );

				return this;

			}

		} );

		function LightShadow( camera ) {

			this.camera = camera;

			this.bias = 0;
			this.normalBias = 0;
			this.radius = 1;

			this.mapSize = new Vector2( 512, 512 );

			this.map = null;
			this.mapPass = null;
			this.matrix = new Matrix4();

			this.autoUpdate = true;
			this.needsUpdate = false;

			this._frustum = new Frustum();
			this._frameExtents = new Vector2( 1, 1 );

			this._viewportCount = 1;

			this._viewports = [

				new Vector4( 0, 0, 1, 1 )

			];

		}

		Object.assign( LightShadow.prototype, {

			_projScreenMatrix: new Matrix4(),

			_lightPositionWorld: new Vector3(),

			_lookTarget: new Vector3(),

			getViewportCount: function () {

				return this._viewportCount;

			},

			getFrustum: function () {

				return this._frustum;

			},

			updateMatrices: function ( light ) {

				var shadowCamera = this.camera,
					shadowMatrix = this.matrix,
					projScreenMatrix = this._projScreenMatrix,
					lookTarget = this._lookTarget,
					lightPositionWorld = this._lightPositionWorld;

				lightPositionWorld.setFromMatrixPosition( light.matrixWorld );
				shadowCamera.position.copy( lightPositionWorld );

				lookTarget.setFromMatrixPosition( light.target.matrixWorld );
				shadowCamera.lookAt( lookTarget );
				shadowCamera.updateMatrixWorld();

				projScreenMatrix.multiplyMatrices( shadowCamera.projectionMatrix, shadowCamera.matrixWorldInverse );
				this._frustum.setFromProjectionMatrix( projScreenMatrix );

				shadowMatrix.set(
					0.5, 0.0, 0.0, 0.5,
					0.0, 0.5, 0.0, 0.5,
					0.0, 0.0, 0.5, 0.5,
					0.0, 0.0, 0.0, 1.0
				);

				shadowMatrix.multiply( shadowCamera.projectionMatrix );
				shadowMatrix.multiply( shadowCamera.matrixWorldInverse );

			},

			getViewport: function ( viewportIndex ) {

				return this._viewports[ viewportIndex ];

			},

			getFrameExtents: function () {

				return this._frameExtents;

			},

			copy: function ( source ) {

				this.camera = source.camera.clone();

				this.bias = source.bias;
				this.radius = source.radius;

				this.mapSize.copy( source.mapSize );

				return this;

			},

			clone: function () {

				return new this.constructor().copy( this );

			},

			toJSON: function () {

				var object = {};

				if ( this.bias !== 0 ) { object.bias = this.bias; }
				if ( this.normalBias !== 0 ) { object.normalBias = this.normalBias; }
				if ( this.radius !== 1 ) { object.radius = this.radius; }
				if ( this.mapSize.x !== 512 || this.mapSize.y !== 512 ) { object.mapSize = this.mapSize.toArray(); }

				object.camera = this.camera.toJSON( false ).object;
				delete object.camera.matrix;

				return object;

			}

		} );

		function SpotLightShadow() {

			LightShadow.call( this, new PerspectiveCamera( 50, 1, 0.5, 500 ) );

		}

		SpotLightShadow.prototype = Object.assign( Object.create( LightShadow.prototype ), {

			constructor: SpotLightShadow,

			isSpotLightShadow: true,

			updateMatrices: function ( light ) {

				var camera = this.camera;

				var fov = MathUtils.RAD2DEG * 2 * light.angle;
				var aspect = this.mapSize.width / this.mapSize.height;
				var far = light.distance || camera.far;

				if ( fov !== camera.fov || aspect !== camera.aspect || far !== camera.far ) {

					camera.fov = fov;
					camera.aspect = aspect;
					camera.far = far;
					camera.updateProjectionMatrix();

				}

				LightShadow.prototype.updateMatrices.call( this, light );

			}

		} );

		function SpotLight( color, intensity, distance, angle, penumbra, decay ) {

			Light.call( this, color, intensity );

			this.type = 'SpotLight';

			this.position.copy( Object3D.DefaultUp );
			this.updateMatrix();

			this.target = new Object3D();

			Object.defineProperty( this, 'power', {
				get: function () {

					// intensity = power per solid angle.
					// ref: equation (17) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf
					return this.intensity * Math.PI;

				},
				set: function ( power ) {

					// intensity = power per solid angle.
					// ref: equation (17) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf
					this.intensity = power / Math.PI;

				}
			} );

			this.distance = ( distance !== undefined ) ? distance : 0;
			this.angle = ( angle !== undefined ) ? angle : Math.PI / 3;
			this.penumbra = ( penumbra !== undefined ) ? penumbra : 0;
			this.decay = ( decay !== undefined ) ? decay : 1;	// for physically correct lights, should be 2.

			this.shadow = new SpotLightShadow();

		}

		SpotLight.prototype = Object.assign( Object.create( Light.prototype ), {

			constructor: SpotLight,

			isSpotLight: true,

			copy: function ( source ) {

				Light.prototype.copy.call( this, source );

				this.distance = source.distance;
				this.angle = source.angle;
				this.penumbra = source.penumbra;
				this.decay = source.decay;

				this.target = source.target.clone();

				this.shadow = source.shadow.clone();

				return this;

			}

		} );

		function PointLightShadow() {

			LightShadow.call( this, new PerspectiveCamera( 90, 1, 0.5, 500 ) );

			this._frameExtents = new Vector2( 4, 2 );

			this._viewportCount = 6;

			this._viewports = [
				// These viewports map a cube-map onto a 2D texture with the
				// following orientation:
				//
				//  xzXZ
				//   y Y
				//
				// X - Positive x direction
				// x - Negative x direction
				// Y - Positive y direction
				// y - Negative y direction
				// Z - Positive z direction
				// z - Negative z direction

				// positive X
				new Vector4( 2, 1, 1, 1 ),
				// negative X
				new Vector4( 0, 1, 1, 1 ),
				// positive Z
				new Vector4( 3, 1, 1, 1 ),
				// negative Z
				new Vector4( 1, 1, 1, 1 ),
				// positive Y
				new Vector4( 3, 0, 1, 1 ),
				// negative Y
				new Vector4( 1, 0, 1, 1 )
			];

			this._cubeDirections = [
				new Vector3( 1, 0, 0 ), new Vector3( - 1, 0, 0 ), new Vector3( 0, 0, 1 ),
				new Vector3( 0, 0, - 1 ), new Vector3( 0, 1, 0 ), new Vector3( 0, - 1, 0 )
			];

			this._cubeUps = [
				new Vector3( 0, 1, 0 ), new Vector3( 0, 1, 0 ), new Vector3( 0, 1, 0 ),
				new Vector3( 0, 1, 0 ), new Vector3( 0, 0, 1 ),	new Vector3( 0, 0, - 1 )
			];

		}

		PointLightShadow.prototype = Object.assign( Object.create( LightShadow.prototype ), {

			constructor: PointLightShadow,

			isPointLightShadow: true,

			updateMatrices: function ( light, viewportIndex ) {

				if ( viewportIndex === undefined ) { viewportIndex = 0; }

				var camera = this.camera,
					shadowMatrix = this.matrix,
					lightPositionWorld = this._lightPositionWorld,
					lookTarget = this._lookTarget,
					projScreenMatrix = this._projScreenMatrix;

				lightPositionWorld.setFromMatrixPosition( light.matrixWorld );
				camera.position.copy( lightPositionWorld );

				lookTarget.copy( camera.position );
				lookTarget.add( this._cubeDirections[ viewportIndex ] );
				camera.up.copy( this._cubeUps[ viewportIndex ] );
				camera.lookAt( lookTarget );
				camera.updateMatrixWorld();

				shadowMatrix.makeTranslation( - lightPositionWorld.x, - lightPositionWorld.y, - lightPositionWorld.z );

				projScreenMatrix.multiplyMatrices( camera.projectionMatrix, camera.matrixWorldInverse );
				this._frustum.setFromProjectionMatrix( projScreenMatrix );

			}

		} );

		function PointLight( color, intensity, distance, decay ) {

			Light.call( this, color, intensity );

			this.type = 'PointLight';

			Object.defineProperty( this, 'power', {
				get: function () {

					// intensity = power per solid angle.
					// ref: equation (15) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf
					return this.intensity * 4 * Math.PI;

				},
				set: function ( power ) {

					// intensity = power per solid angle.
					// ref: equation (15) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf
					this.intensity = power / ( 4 * Math.PI );

				}
			} );

			this.distance = ( distance !== undefined ) ? distance : 0;
			this.decay = ( decay !== undefined ) ? decay : 1;	// for physically correct lights, should be 2.

			this.shadow = new PointLightShadow();

		}

		PointLight.prototype = Object.assign( Object.create( Light.prototype ), {

			constructor: PointLight,

			isPointLight: true,

			copy: function ( source ) {

				Light.prototype.copy.call( this, source );

				this.distance = source.distance;
				this.decay = source.decay;

				this.shadow = source.shadow.clone();

				return this;

			}

		} );

		function OrthographicCamera( left, right, top, bottom, near, far ) {

			Camera.call( this );

			this.type = 'OrthographicCamera';

			this.zoom = 1;
			this.view = null;

			this.left = ( left !== undefined ) ? left : - 1;
			this.right = ( right !== undefined ) ? right : 1;
			this.top = ( top !== undefined ) ? top : 1;
			this.bottom = ( bottom !== undefined ) ? bottom : - 1;

			this.near = ( near !== undefined ) ? near : 0.1;
			this.far = ( far !== undefined ) ? far : 2000;

			this.updateProjectionMatrix();

		}

		OrthographicCamera.prototype = Object.assign( Object.create( Camera.prototype ), {

			constructor: OrthographicCamera,

			isOrthographicCamera: true,

			copy: function ( source, recursive ) {

				Camera.prototype.copy.call( this, source, recursive );

				this.left = source.left;
				this.right = source.right;
				this.top = source.top;
				this.bottom = source.bottom;
				this.near = source.near;
				this.far = source.far;

				this.zoom = source.zoom;
				this.view = source.view === null ? null : Object.assign( {}, source.view );

				return this;

			},

			setViewOffset: function ( fullWidth, fullHeight, x, y, width, height ) {

				if ( this.view === null ) {

					this.view = {
						enabled: true,
						fullWidth: 1,
						fullHeight: 1,
						offsetX: 0,
						offsetY: 0,
						width: 1,
						height: 1
					};

				}

				this.view.enabled = true;
				this.view.fullWidth = fullWidth;
				this.view.fullHeight = fullHeight;
				this.view.offsetX = x;
				this.view.offsetY = y;
				this.view.width = width;
				this.view.height = height;

				this.updateProjectionMatrix();

			},

			clearViewOffset: function () {

				if ( this.view !== null ) {

					this.view.enabled = false;

				}

				this.updateProjectionMatrix();

			},

			updateProjectionMatrix: function () {

				var dx = ( this.right - this.left ) / ( 2 * this.zoom );
				var dy = ( this.top - this.bottom ) / ( 2 * this.zoom );
				var cx = ( this.right + this.left ) / 2;
				var cy = ( this.top + this.bottom ) / 2;

				var left = cx - dx;
				var right = cx + dx;
				var top = cy + dy;
				var bottom = cy - dy;

				if ( this.view !== null && this.view.enabled ) {

					var scaleW = ( this.right - this.left ) / this.view.fullWidth / this.zoom;
					var scaleH = ( this.top - this.bottom ) / this.view.fullHeight / this.zoom;

					left += scaleW * this.view.offsetX;
					right = left + scaleW * this.view.width;
					top -= scaleH * this.view.offsetY;
					bottom = top - scaleH * this.view.height;

				}

				this.projectionMatrix.makeOrthographic( left, right, top, bottom, this.near, this.far );

				this.projectionMatrixInverse.getInverse( this.projectionMatrix );

			},

			toJSON: function ( meta ) {

				var data = Object3D.prototype.toJSON.call( this, meta );

				data.object.zoom = this.zoom;
				data.object.left = this.left;
				data.object.right = this.right;
				data.object.top = this.top;
				data.object.bottom = this.bottom;
				data.object.near = this.near;
				data.object.far = this.far;

				if ( this.view !== null ) { data.object.view = Object.assign( {}, this.view ); }

				return data;

			}

		} );

		function DirectionalLightShadow() {

			LightShadow.call( this, new OrthographicCamera( - 5, 5, 5, - 5, 0.5, 500 ) );

		}

		DirectionalLightShadow.prototype = Object.assign( Object.create( LightShadow.prototype ), {

			constructor: DirectionalLightShadow,

			isDirectionalLightShadow: true,

			updateMatrices: function ( light ) {

				LightShadow.prototype.updateMatrices.call( this, light );

			}

		} );

		function DirectionalLight( color, intensity ) {

			Light.call( this, color, intensity );

			this.type = 'DirectionalLight';

			this.position.copy( Object3D.DefaultUp );
			this.updateMatrix();

			this.target = new Object3D();

			this.shadow = new DirectionalLightShadow();

		}

		DirectionalLight.prototype = Object.assign( Object.create( Light.prototype ), {

			constructor: DirectionalLight,

			isDirectionalLight: true,

			copy: function ( source ) {

				Light.prototype.copy.call( this, source );

				this.target = source.target.clone();

				this.shadow = source.shadow.clone();

				return this;

			}

		} );

		function AmbientLight( color, intensity ) {

			Light.call( this, color, intensity );

			this.type = 'AmbientLight';

			this.castShadow = undefined;

		}

		AmbientLight.prototype = Object.assign( Object.create( Light.prototype ), {

			constructor: AmbientLight,

			isAmbientLight: true

		} );

		function RectAreaLight( color, intensity, width, height ) {

			Light.call( this, color, intensity );

			this.type = 'RectAreaLight';

			this.width = ( width !== undefined ) ? width : 10;
			this.height = ( height !== undefined ) ? height : 10;

		}

		RectAreaLight.prototype = Object.assign( Object.create( Light.prototype ), {

			constructor: RectAreaLight,

			isRectAreaLight: true,

			copy: function ( source ) {

				Light.prototype.copy.call( this, source );

				this.width = source.width;
				this.height = source.height;

				return this;

			},

			toJSON: function ( meta ) {

				var data = Light.prototype.toJSON.call( this, meta );

				data.object.width = this.width;
				data.object.height = this.height;

				return data;

			}

		} );

		/**
		 * Primary reference:
		 *   https://graphics.stanford.edu/papers/envmap/envmap.pdf
		 *
		 * Secondary reference:
		 *   https://www.ppsloan.org/publications/StupidSH36.pdf
		 */

		// 3-band SH defined by 9 coefficients

		var SphericalHarmonics3 = function SphericalHarmonics3() {

			Object.defineProperty( this, 'isSphericalHarmonics3', { value: true } );

			this.coefficients = [];

			for ( var i = 0; i < 9; i ++ ) {

				this.coefficients.push( new Vector3() );

			}

		};

		SphericalHarmonics3.prototype.set = function set ( coefficients ) {

			for ( var i = 0; i < 9; i ++ ) {

				this.coefficients[ i ].copy( coefficients[ i ] );

			}

			return this;

		};

		SphericalHarmonics3.prototype.zero = function zero () {

			for ( var i = 0; i < 9; i ++ ) {

				this.coefficients[ i ].set( 0, 0, 0 );

			}

			return this;

		};

		// get the radiance in the direction of the normal
		// target is a Vector3
		SphericalHarmonics3.prototype.getAt = function getAt ( normal, target ) {

			// normal is assumed to be unit length

			var x = normal.x, y = normal.y, z = normal.z;

			var coeff = this.coefficients;

			// band 0
			target.copy( coeff[ 0 ] ).multiplyScalar( 0.282095 );

			// band 1
			target.addScaledVector( coeff[ 1 ], 0.488603 * y );
			target.addScaledVector( coeff[ 2 ], 0.488603 * z );
			target.addScaledVector( coeff[ 3 ], 0.488603 * x );

			// band 2
			target.addScaledVector( coeff[ 4 ], 1.092548 * ( x * y ) );
			target.addScaledVector( coeff[ 5 ], 1.092548 * ( y * z ) );
			target.addScaledVector( coeff[ 6 ], 0.315392 * ( 3.0 * z * z - 1.0 ) );
			target.addScaledVector( coeff[ 7 ], 1.092548 * ( x * z ) );
			target.addScaledVector( coeff[ 8 ], 0.546274 * ( x * x - y * y ) );

			return target;

		};

		// get the irradiance (radiance convolved with cosine lobe) in the direction of the normal
		// target is a Vector3
		// https://graphics.stanford.edu/papers/envmap/envmap.pdf
		SphericalHarmonics3.prototype.getIrradianceAt = function getIrradianceAt ( normal, target ) {

			// normal is assumed to be unit length

			var x = normal.x, y = normal.y, z = normal.z;

			var coeff = this.coefficients;

			// band 0
			target.copy( coeff[ 0 ] ).multiplyScalar( 0.886227 ); // π * 0.282095

			// band 1
			target.addScaledVector( coeff[ 1 ], 2.0 * 0.511664 * y ); // ( 2 * π / 3 ) * 0.488603
			target.addScaledVector( coeff[ 2 ], 2.0 * 0.511664 * z );
			target.addScaledVector( coeff[ 3 ], 2.0 * 0.511664 * x );

			// band 2
			target.addScaledVector( coeff[ 4 ], 2.0 * 0.429043 * x * y ); // ( π / 4 ) * 1.092548
			target.addScaledVector( coeff[ 5 ], 2.0 * 0.429043 * y * z );
			target.addScaledVector( coeff[ 6 ], 0.743125 * z * z - 0.247708 ); // ( π / 4 ) * 0.315392 * 3
			target.addScaledVector( coeff[ 7 ], 2.0 * 0.429043 * x * z );
			target.addScaledVector( coeff[ 8 ], 0.429043 * ( x * x - y * y ) ); // ( π / 4 ) * 0.546274

			return target;

		};

		SphericalHarmonics3.prototype.add = function add ( sh ) {

			for ( var i = 0; i < 9; i ++ ) {

				this.coefficients[ i ].add( sh.coefficients[ i ] );

			}

			return this;

		};

		SphericalHarmonics3.prototype.addScaledSH = function addScaledSH ( sh, s ) {

			for ( var i = 0; i < 9; i ++ ) {

				this.coefficients[ i ].addScaledVector( sh.coefficients[ i ], s );

			}

			return this;

		};

		SphericalHarmonics3.prototype.scale = function scale ( s ) {

			for ( var i = 0; i < 9; i ++ ) {

				this.coefficients[ i ].multiplyScalar( s );

			}

			return this;

		};

		SphericalHarmonics3.prototype.lerp = function lerp ( sh, alpha ) {

			for ( var i = 0; i < 9; i ++ ) {

				this.coefficients[ i ].lerp( sh.coefficients[ i ], alpha );

			}

			return this;

		};

		SphericalHarmonics3.prototype.equals = function equals ( sh ) {

			for ( var i = 0; i < 9; i ++ ) {

				if ( ! this.coefficients[ i ].equals( sh.coefficients[ i ] ) ) {

					return false;

				}

			}

			return true;

		};

		SphericalHarmonics3.prototype.copy = function copy ( sh ) {

			return this.set( sh.coefficients );

		};

		SphericalHarmonics3.prototype.clone = function clone () {

			return new this.constructor().copy( this );

		};

		SphericalHarmonics3.prototype.fromArray = function fromArray ( array, offset ) {

			if ( offset === undefined ) { offset = 0; }

			var coefficients = this.coefficients;

			for ( var i = 0; i < 9; i ++ ) {

				coefficients[ i ].fromArray( array, offset + ( i * 3 ) );

			}

			return this;

		};

		SphericalHarmonics3.prototype.toArray = function toArray ( array, offset ) {

			if ( array === undefined ) { array = []; }
			if ( offset === undefined ) { offset = 0; }

			var coefficients = this.coefficients;

			for ( var i = 0; i < 9; i ++ ) {

				coefficients[ i ].toArray( array, offset + ( i * 3 ) );

			}

			return array;

		};

		// evaluate the basis functions
		// shBasis is an Array[ 9 ]
		SphericalHarmonics3.getBasisAt = function getBasisAt ( normal, shBasis ) {

			// normal is assumed to be unit length

			var x = normal.x, y = normal.y, z = normal.z;

			// band 0
			shBasis[ 0 ] = 0.282095;

			// band 1
			shBasis[ 1 ] = 0.488603 * y;
			shBasis[ 2 ] = 0.488603 * z;
			shBasis[ 3 ] = 0.488603 * x;

			// band 2
			shBasis[ 4 ] = 1.092548 * x * y;
			shBasis[ 5 ] = 1.092548 * y * z;
			shBasis[ 6 ] = 0.315392 * ( 3 * z * z - 1 );
			shBasis[ 7 ] = 1.092548 * x * z;
			shBasis[ 8 ] = 0.546274 * ( x * x - y * y );

		};

		function LightProbe( sh, intensity ) {

			Light.call( this, undefined, intensity );

			this.type = 'LightProbe';

			this.sh = ( sh !== undefined ) ? sh : new SphericalHarmonics3();

		}

		LightProbe.prototype = Object.assign( Object.create( Light.prototype ), {

			constructor: LightProbe,

			isLightProbe: true,

			copy: function ( source ) {

				Light.prototype.copy.call( this, source );

				this.sh.copy( source.sh );

				return this;

			},

			fromJSON: function ( json ) {

				this.intensity = json.intensity; // TODO: Move this bit to Light.fromJSON();
				this.sh.fromArray( json.sh );

				return this;

			},

			toJSON: function ( meta ) {

				var data = Light.prototype.toJSON.call( this, meta );

				data.object.sh = this.sh.toArray();

				return data;

			}

		} );

		function MaterialLoader( manager ) {

			Loader.call( this, manager );

			this.textures = {};

		}

		MaterialLoader.prototype = Object.assign( Object.create( Loader.prototype ), {

			constructor: MaterialLoader,

			load: function ( url, onLoad, onProgress, onError ) {

				var scope = this;

				var loader = new FileLoader( scope.manager );
				loader.setPath( scope.path );
				loader.setRequestHeader( scope.requestHeader );
				loader.load( url, function ( text ) {

					try {

						onLoad( scope.parse( JSON.parse( text ) ) );

					} catch ( e ) {

						if ( onError ) {

							onError( e );

						} else {

							console.error( e );

						}

						scope.manager.itemError( url );

					}

				}, onProgress, onError );

			},

			parse: function ( json ) {

				var textures = this.textures;

				function getTexture( name ) {

					if ( textures[ name ] === undefined ) {

						console.warn( 'THREE.MaterialLoader: Undefined texture', name );

					}

					return textures[ name ];

				}

				var material = new Materials[ json.type ]();

				if ( json.uuid !== undefined ) { material.uuid = json.uuid; }
				if ( json.name !== undefined ) { material.name = json.name; }
				if ( json.color !== undefined ) { material.color.setHex( json.color ); }
				if ( json.roughness !== undefined ) { material.roughness = json.roughness; }
				if ( json.metalness !== undefined ) { material.metalness = json.metalness; }
				if ( json.sheen !== undefined ) { material.sheen = new Color().setHex( json.sheen ); }
				if ( json.emissive !== undefined ) { material.emissive.setHex( json.emissive ); }
				if ( json.specular !== undefined ) { material.specular.setHex( json.specular ); }
				if ( json.shininess !== undefined ) { material.shininess = json.shininess; }
				if ( json.clearcoat !== undefined ) { material.clearcoat = json.clearcoat; }
				if ( json.clearcoatRoughness !== undefined ) { material.clearcoatRoughness = json.clearcoatRoughness; }
				if ( json.fog !== undefined ) { material.fog = json.fog; }
				if ( json.flatShading !== undefined ) { material.flatShading = json.flatShading; }
				if ( json.blending !== undefined ) { material.blending = json.blending; }
				if ( json.combine !== undefined ) { material.combine = json.combine; }
				if ( json.side !== undefined ) { material.side = json.side; }
				if ( json.opacity !== undefined ) { material.opacity = json.opacity; }
				if ( json.transparent !== undefined ) { material.transparent = json.transparent; }
				if ( json.alphaTest !== undefined ) { material.alphaTest = json.alphaTest; }
				if ( json.depthTest !== undefined ) { material.depthTest = json.depthTest; }
				if ( json.depthWrite !== undefined ) { material.depthWrite = json.depthWrite; }
				if ( json.colorWrite !== undefined ) { material.colorWrite = json.colorWrite; }

				if ( json.stencilWrite !== undefined ) { material.stencilWrite = json.stencilWrite; }
				if ( json.stencilWriteMask !== undefined ) { material.stencilWriteMask = json.stencilWriteMask; }
				if ( json.stencilFunc !== undefined ) { material.stencilFunc = json.stencilFunc; }
				if ( json.stencilRef !== undefined ) { material.stencilRef = json.stencilRef; }
				if ( json.stencilFuncMask !== undefined ) { material.stencilFuncMask = json.stencilFuncMask; }
				if ( json.stencilFail !== undefined ) { material.stencilFail = json.stencilFail; }
				if ( json.stencilZFail !== undefined ) { material.stencilZFail = json.stencilZFail; }
				if ( json.stencilZPass !== undefined ) { material.stencilZPass = json.stencilZPass; }

				if ( json.wireframe !== undefined ) { material.wireframe = json.wireframe; }
				if ( json.wireframeLinewidth !== undefined ) { material.wireframeLinewidth = json.wireframeLinewidth; }
				if ( json.wireframeLinecap !== undefined ) { material.wireframeLinecap = json.wireframeLinecap; }
				if ( json.wireframeLinejoin !== undefined ) { material.wireframeLinejoin = json.wireframeLinejoin; }

				if ( json.rotation !== undefined ) { material.rotation = json.rotation; }

				if ( json.linewidth !== 1 ) { material.linewidth = json.linewidth; }
				if ( json.dashSize !== undefined ) { material.dashSize = json.dashSize; }
				if ( json.gapSize !== undefined ) { material.gapSize = json.gapSize; }
				if ( json.scale !== undefined ) { material.scale = json.scale; }

				if ( json.polygonOffset !== undefined ) { material.polygonOffset = json.polygonOffset; }
				if ( json.polygonOffsetFactor !== undefined ) { material.polygonOffsetFactor = json.polygonOffsetFactor; }
				if ( json.polygonOffsetUnits !== undefined ) { material.polygonOffsetUnits = json.polygonOffsetUnits; }

				if ( json.skinning !== undefined ) { material.skinning = json.skinning; }
				if ( json.morphTargets !== undefined ) { material.morphTargets = json.morphTargets; }
				if ( json.morphNormals !== undefined ) { material.morphNormals = json.morphNormals; }
				if ( json.dithering !== undefined ) { material.dithering = json.dithering; }

				if ( json.vertexTangents !== undefined ) { material.vertexTangents = json.vertexTangents; }

				if ( json.visible !== undefined ) { material.visible = json.visible; }

				if ( json.toneMapped !== undefined ) { material.toneMapped = json.toneMapped; }

				if ( json.userData !== undefined ) { material.userData = json.userData; }

				if ( json.vertexColors !== undefined ) {

					if ( typeof json.vertexColors === 'number' ) {

						material.vertexColors = ( json.vertexColors > 0 ) ? true : false;

					} else {

						material.vertexColors = json.vertexColors;

					}

				}

				// Shader Material

				if ( json.uniforms !== undefined ) {

					for ( var name in json.uniforms ) {

						var uniform = json.uniforms[ name ];

						material.uniforms[ name ] = {};

						switch ( uniform.type ) {

							case 't':
								material.uniforms[ name ].value = getTexture( uniform.value );
								break;

							case 'c':
								material.uniforms[ name ].value = new Color().setHex( uniform.value );
								break;

							case 'v2':
								material.uniforms[ name ].value = new Vector2().fromArray( uniform.value );
								break;

							case 'v3':
								material.uniforms[ name ].value = new Vector3().fromArray( uniform.value );
								break;

							case 'v4':
								material.uniforms[ name ].value = new Vector4().fromArray( uniform.value );
								break;

							case 'm3':
								material.uniforms[ name ].value = new Matrix3().fromArray( uniform.value );
								break;

							case 'm4':
								material.uniforms[ name ].value = new Matrix4().fromArray( uniform.value );
								break;

							default:
								material.uniforms[ name ].value = uniform.value;

						}

					}

				}

				if ( json.defines !== undefined ) { material.defines = json.defines; }
				if ( json.vertexShader !== undefined ) { material.vertexShader = json.vertexShader; }
				if ( json.fragmentShader !== undefined ) { material.fragmentShader = json.fragmentShader; }

				if ( json.extensions !== undefined ) {

					for ( var key in json.extensions ) {

						material.extensions[ key ] = json.extensions[ key ];

					}

				}

				// Deprecated

				if ( json.shading !== undefined ) { material.flatShading = json.shading === 1; } // THREE.FlatShading

				// for PointsMaterial

				if ( json.size !== undefined ) { material.size = json.size; }
				if ( json.sizeAttenuation !== undefined ) { material.sizeAttenuation = json.sizeAttenuation; }

				// maps

				if ( json.map !== undefined ) { material.map = getTexture( json.map ); }
				if ( json.matcap !== undefined ) { material.matcap = getTexture( json.matcap ); }

				if ( json.alphaMap !== undefined ) { material.alphaMap = getTexture( json.alphaMap ); }

				if ( json.bumpMap !== undefined ) { material.bumpMap = getTexture( json.bumpMap ); }
				if ( json.bumpScale !== undefined ) { material.bumpScale = json.bumpScale; }

				if ( json.normalMap !== undefined ) { material.normalMap = getTexture( json.normalMap ); }
				if ( json.normalMapType !== undefined ) { material.normalMapType = json.normalMapType; }
				if ( json.normalScale !== undefined ) {

					var normalScale = json.normalScale;

					if ( Array.isArray( normalScale ) === false ) {

						// Blender exporter used to export a scalar. See #7459

						normalScale = [ normalScale, normalScale ];

					}

					material.normalScale = new Vector2().fromArray( normalScale );

				}

				if ( json.displacementMap !== undefined ) { material.displacementMap = getTexture( json.displacementMap ); }
				if ( json.displacementScale !== undefined ) { material.displacementScale = json.displacementScale; }
				if ( json.displacementBias !== undefined ) { material.displacementBias = json.displacementBias; }

				if ( json.roughnessMap !== undefined ) { material.roughnessMap = getTexture( json.roughnessMap ); }
				if ( json.metalnessMap !== undefined ) { material.metalnessMap = getTexture( json.metalnessMap ); }

				if ( json.emissiveMap !== undefined ) { material.emissiveMap = getTexture( json.emissiveMap ); }
				if ( json.emissiveIntensity !== undefined ) { material.emissiveIntensity = json.emissiveIntensity; }

				if ( json.specularMap !== undefined ) { material.specularMap = getTexture( json.specularMap ); }

				if ( json.envMap !== undefined ) { material.envMap = getTexture( json.envMap ); }
				if ( json.envMapIntensity !== undefined ) { material.envMapIntensity = json.envMapIntensity; }

				if ( json.reflectivity !== undefined ) { material.reflectivity = json.reflectivity; }
				if ( json.refractionRatio !== undefined ) { material.refractionRatio = json.refractionRatio; }

				if ( json.lightMap !== undefined ) { material.lightMap = getTexture( json.lightMap ); }
				if ( json.lightMapIntensity !== undefined ) { material.lightMapIntensity = json.lightMapIntensity; }

				if ( json.aoMap !== undefined ) { material.aoMap = getTexture( json.aoMap ); }
				if ( json.aoMapIntensity !== undefined ) { material.aoMapIntensity = json.aoMapIntensity; }

				if ( json.gradientMap !== undefined ) { material.gradientMap = getTexture( json.gradientMap ); }

				if ( json.clearcoatMap !== undefined ) { material.clearcoatMap = getTexture( json.clearcoatMap ); }
				if ( json.clearcoatRoughnessMap !== undefined ) { material.clearcoatRoughnessMap = getTexture( json.clearcoatRoughnessMap ); }
				if ( json.clearcoatNormalMap !== undefined ) { material.clearcoatNormalMap = getTexture( json.clearcoatNormalMap ); }
				if ( json.clearcoatNormalScale !== undefined ) { material.clearcoatNormalScale = new Vector2().fromArray( json.clearcoatNormalScale ); }

				if ( json.transmission !== undefined ) { material.transmission = json.transmission; }
				if ( json.transmissionMap !== undefined ) { material.transmissionMap = getTexture( json.transmissionMap ); }

				return material;

			},

			setTextures: function ( value ) {

				this.textures = value;
				return this;

			}

		} );

		var LoaderUtils = {

			decodeText: function ( array ) {

				if ( typeof TextDecoder !== 'undefined' ) {

					return new TextDecoder().decode( array );

				}

				// Avoid the String.fromCharCode.apply(null, array) shortcut, which
				// throws a "maximum call stack size exceeded" error for large arrays.

				var s = '';

				for ( var i = 0, il = array.length; i < il; i ++ ) {

					// Implicitly assumes little-endian.
					s += String.fromCharCode( array[ i ] );

				}

				try {

					// merges multi-byte utf-8 characters.

					return decodeURIComponent( escape( s ) );

				} catch ( e ) { // see #16358

					return s;

				}

			},

			extractUrlBase: function ( url ) {

				var index = url.lastIndexOf( '/' );

				if ( index === - 1 ) { return './'; }

				return url.substr( 0, index + 1 );

			}

		};

		function InstancedBufferGeometry() {

			BufferGeometry.call( this );

			this.type = 'InstancedBufferGeometry';
			this.instanceCount = Infinity;

		}

		InstancedBufferGeometry.prototype = Object.assign( Object.create( BufferGeometry.prototype ), {

			constructor: InstancedBufferGeometry,

			isInstancedBufferGeometry: true,

			copy: function ( source ) {

				BufferGeometry.prototype.copy.call( this, source );

				this.instanceCount = source.instanceCount;

				return this;

			},

			clone: function () {

				return new this.constructor().copy( this );

			},

			toJSON: function () {

				var data = BufferGeometry.prototype.toJSON.call( this );

				data.instanceCount = this.instanceCount;

				data.isInstancedBufferGeometry = true;

				return data;

			}

		} );

		function InstancedBufferAttribute( array, itemSize, normalized, meshPerAttribute ) {

			if ( typeof ( normalized ) === 'number' ) {

				meshPerAttribute = normalized;

				normalized = false;

				console.error( 'THREE.InstancedBufferAttribute: The constructor now expects normalized as the third argument.' );

			}

			BufferAttribute.call( this, array, itemSize, normalized );

			this.meshPerAttribute = meshPerAttribute || 1;

		}

		InstancedBufferAttribute.prototype = Object.assign( Object.create( BufferAttribute.prototype ), {

			constructor: InstancedBufferAttribute,

			isInstancedBufferAttribute: true,

			copy: function ( source ) {

				BufferAttribute.prototype.copy.call( this, source );

				this.meshPerAttribute = source.meshPerAttribute;

				return this;

			},

			toJSON: function ()	{

				var data = BufferAttribute.prototype.toJSON.call( this );

				data.meshPerAttribute = this.meshPerAttribute;

				data.isInstancedBufferAttribute = true;

				return data;

			}

		} );

		function BufferGeometryLoader( manager ) {

			Loader.call( this, manager );

		}

		BufferGeometryLoader.prototype = Object.assign( Object.create( Loader.prototype ), {

			constructor: BufferGeometryLoader,

			load: function ( url, onLoad, onProgress, onError ) {

				var scope = this;

				var loader = new FileLoader( scope.manager );
				loader.setPath( scope.path );
				loader.setRequestHeader( scope.requestHeader );
				loader.load( url, function ( text ) {

					try {

						onLoad( scope.parse( JSON.parse( text ) ) );

					} catch ( e ) {

						if ( onError ) {

							onError( e );

						} else {

							console.error( e );

						}

						scope.manager.itemError( url );

					}

				}, onProgress, onError );

			},

			parse: function ( json ) {

				var interleavedBufferMap = {};
				var arrayBufferMap = {};

				function getInterleavedBuffer( json, uuid ) {

					if ( interleavedBufferMap[ uuid ] !== undefined ) { return interleavedBufferMap[ uuid ]; }

					var interleavedBuffers = json.interleavedBuffers;
					var interleavedBuffer = interleavedBuffers[ uuid ];

					var buffer = getArrayBuffer( json, interleavedBuffer.buffer );

					var array = new TYPED_ARRAYS[ interleavedBuffer.type ]( buffer );
					var ib = new InterleavedBuffer( array, interleavedBuffer.stride );
					ib.uuid = interleavedBuffer.uuid;

					interleavedBufferMap[ uuid ] = ib;

					return ib;

				}

				function getArrayBuffer( json, uuid ) {

					if ( arrayBufferMap[ uuid ] !== undefined ) { return arrayBufferMap[ uuid ]; }

					var arrayBuffers = json.arrayBuffers;
					var arrayBuffer = arrayBuffers[ uuid ];

					var ab = new Uint32Array( arrayBuffer ).buffer;

					arrayBufferMap[ uuid ] = ab;

					return ab;

				}

				var geometry = json.isInstancedBufferGeometry ? new InstancedBufferGeometry() : new BufferGeometry();

				var index = json.data.index;

				if ( index !== undefined ) {

					var typedArray = new TYPED_ARRAYS[ index.type ]( index.array );
					geometry.setIndex( new BufferAttribute( typedArray, 1 ) );

				}

				var attributes = json.data.attributes;

				for ( var key in attributes ) {

					var attribute = attributes[ key ];
					var bufferAttribute = (void 0);

					if ( attribute.isInterleavedBufferAttribute ) {

						var interleavedBuffer = getInterleavedBuffer( json.data, attribute.data );
						bufferAttribute = new InterleavedBufferAttribute( interleavedBuffer, attribute.itemSize, attribute.offset, attribute.normalized );

					} else {

						var typedArray$1 = new TYPED_ARRAYS[ attribute.type ]( attribute.array );
						var bufferAttributeConstr = attribute.isInstancedBufferAttribute ? InstancedBufferAttribute : BufferAttribute;
						bufferAttribute = new bufferAttributeConstr( typedArray$1, attribute.itemSize, attribute.normalized );

					}

					if ( attribute.name !== undefined ) { bufferAttribute.name = attribute.name; }
					geometry.setAttribute( key, bufferAttribute );

				}

				var morphAttributes = json.data.morphAttributes;

				if ( morphAttributes ) {

					for ( var key$1 in morphAttributes ) {

						var attributeArray = morphAttributes[ key$1 ];

						var array = [];

						for ( var i = 0, il = attributeArray.length; i < il; i ++ ) {

							var attribute$1 = attributeArray[ i ];
							var bufferAttribute$1 = (void 0);

							if ( attribute$1.isInterleavedBufferAttribute ) {

								var interleavedBuffer$1 = getInterleavedBuffer( json.data, attribute$1.data );
								bufferAttribute$1 = new InterleavedBufferAttribute( interleavedBuffer$1, attribute$1.itemSize, attribute$1.offset, attribute$1.normalized );

							} else {

								var typedArray$2 = new TYPED_ARRAYS[ attribute$1.type ]( attribute$1.array );
								bufferAttribute$1 = new BufferAttribute( typedArray$2, attribute$1.itemSize, attribute$1.normalized );

							}

							if ( attribute$1.name !== undefined ) { bufferAttribute$1.name = attribute$1.name; }
							array.push( bufferAttribute$1 );

						}

						geometry.morphAttributes[ key$1 ] = array;

					}

				}

				var morphTargetsRelative = json.data.morphTargetsRelative;

				if ( morphTargetsRelative ) {

					geometry.morphTargetsRelative = true;

				}

				var groups = json.data.groups || json.data.drawcalls || json.data.offsets;

				if ( groups !== undefined ) {

					for ( var i$1 = 0, n = groups.length; i$1 !== n; ++ i$1 ) {

						var group = groups[ i$1 ];

						geometry.addGroup( group.start, group.count, group.materialIndex );

					}

				}

				var boundingSphere = json.data.boundingSphere;

				if ( boundingSphere !== undefined ) {

					var center = new Vector3();

					if ( boundingSphere.center !== undefined ) {

						center.fromArray( boundingSphere.center );

					}

					geometry.boundingSphere = new Sphere( center, boundingSphere.radius );

				}

				if ( json.name ) { geometry.name = json.name; }
				if ( json.userData ) { geometry.userData = json.userData; }

				return geometry;

			}

		} );

		var TYPED_ARRAYS = {
			Int8Array: Int8Array,
			Uint8Array: Uint8Array,
			// Workaround for IE11 pre KB2929437. See #11440
			Uint8ClampedArray: typeof Uint8ClampedArray !== 'undefined' ? Uint8ClampedArray : Uint8Array,
			Int16Array: Int16Array,
			Uint16Array: Uint16Array,
			Int32Array: Int32Array,
			Uint32Array: Uint32Array,
			Float32Array: Float32Array,
			Float64Array: Float64Array
		};

		function ObjectLoader( manager ) {

			Loader.call( this, manager );

		}

		ObjectLoader.prototype = Object.assign( Object.create( Loader.prototype ), {

			constructor: ObjectLoader,

			load: function ( url, onLoad, onProgress, onError ) {

				var scope = this;

				var path = ( this.path === '' ) ? LoaderUtils.extractUrlBase( url ) : this.path;
				this.resourcePath = this.resourcePath || path;

				var loader = new FileLoader( scope.manager );
				loader.setPath( this.path );
				loader.setRequestHeader( this.requestHeader );
				loader.load( url, function ( text ) {

					var json = null;

					try {

						json = JSON.parse( text );

					} catch ( error ) {

						if ( onError !== undefined ) { onError( error ); }

						console.error( 'THREE:ObjectLoader: Can\'t parse ' + url + '.', error.message );

						return;

					}

					var metadata = json.metadata;

					if ( metadata === undefined || metadata.type === undefined || metadata.type.toLowerCase() === 'geometry' ) {

						console.error( 'THREE.ObjectLoader: Can\'t load ' + url );
						return;

					}

					scope.parse( json, onLoad );

				}, onProgress, onError );

			},

			parse: function ( json, onLoad ) {

				var shapes = this.parseShape( json.shapes );
				var geometries = this.parseGeometries( json.geometries, shapes );

				var images = this.parseImages( json.images, function () {

					if ( onLoad !== undefined ) { onLoad( object ); }

				} );

				var textures = this.parseTextures( json.textures, images );
				var materials = this.parseMaterials( json.materials, textures );

				var object = this.parseObject( json.object, geometries, materials );

				if ( json.animations ) {

					object.animations = this.parseAnimations( json.animations );

				}

				if ( json.images === undefined || json.images.length === 0 ) {

					if ( onLoad !== undefined ) { onLoad( object ); }

				}

				return object;

			},

			parseShape: function ( json ) {

				var shapes = {};

				if ( json !== undefined ) {

					for ( var i = 0, l = json.length; i < l; i ++ ) {

						var shape = new Shape().fromJSON( json[ i ] );

						shapes[ shape.uuid ] = shape;

					}

				}

				return shapes;

			},

			parseGeometries: function ( json, shapes ) {

				var geometries = {};
				var geometryShapes;

				if ( json !== undefined ) {

					var bufferGeometryLoader = new BufferGeometryLoader();

					for ( var i = 0, l = json.length; i < l; i ++ ) {

						var geometry = (void 0);
						var data = json[ i ];

						switch ( data.type ) {

							case 'PlaneGeometry':
							case 'PlaneBufferGeometry':

								geometry = new Geometries[ data.type ](
									data.width,
									data.height,
									data.widthSegments,
									data.heightSegments
								);

								break;

							case 'BoxGeometry':
							case 'BoxBufferGeometry':
							case 'CubeGeometry': // backwards compatible

								geometry = new Geometries[ data.type ](
									data.width,
									data.height,
									data.depth,
									data.widthSegments,
									data.heightSegments,
									data.depthSegments
								);

								break;

							case 'CircleGeometry':
							case 'CircleBufferGeometry':

								geometry = new Geometries[ data.type ](
									data.radius,
									data.segments,
									data.thetaStart,
									data.thetaLength
								);

								break;

							case 'CylinderGeometry':
							case 'CylinderBufferGeometry':

								geometry = new Geometries[ data.type ](
									data.radiusTop,
									data.radiusBottom,
									data.height,
									data.radialSegments,
									data.heightSegments,
									data.openEnded,
									data.thetaStart,
									data.thetaLength
								);

								break;

							case 'ConeGeometry':
							case 'ConeBufferGeometry':

								geometry = new Geometries[ data.type ](
									data.radius,
									data.height,
									data.radialSegments,
									data.heightSegments,
									data.openEnded,
									data.thetaStart,
									data.thetaLength
								);

								break;

							case 'SphereGeometry':
							case 'SphereBufferGeometry':

								geometry = new Geometries[ data.type ](
									data.radius,
									data.widthSegments,
									data.heightSegments,
									data.phiStart,
									data.phiLength,
									data.thetaStart,
									data.thetaLength
								);

								break;

							case 'DodecahedronGeometry':
							case 'DodecahedronBufferGeometry':
							case 'IcosahedronGeometry':
							case 'IcosahedronBufferGeometry':
							case 'OctahedronGeometry':
							case 'OctahedronBufferGeometry':
							case 'TetrahedronGeometry':
							case 'TetrahedronBufferGeometry':

								geometry = new Geometries[ data.type ](
									data.radius,
									data.detail
								);

								break;

							case 'RingGeometry':
							case 'RingBufferGeometry':

								geometry = new Geometries[ data.type ](
									data.innerRadius,
									data.outerRadius,
									data.thetaSegments,
									data.phiSegments,
									data.thetaStart,
									data.thetaLength
								);

								break;

							case 'TorusGeometry':
							case 'TorusBufferGeometry':

								geometry = new Geometries[ data.type ](
									data.radius,
									data.tube,
									data.radialSegments,
									data.tubularSegments,
									data.arc
								);

								break;

							case 'TorusKnotGeometry':
							case 'TorusKnotBufferGeometry':

								geometry = new Geometries[ data.type ](
									data.radius,
									data.tube,
									data.tubularSegments,
									data.radialSegments,
									data.p,
									data.q
								);

								break;

							case 'TubeGeometry':
							case 'TubeBufferGeometry':

								// This only works for built-in curves (e.g. CatmullRomCurve3).
								// User defined curves or instances of CurvePath will not be deserialized.
								geometry = new Geometries[ data.type ](
									new Curves[ data.path.type ]().fromJSON( data.path ),
									data.tubularSegments,
									data.radius,
									data.radialSegments,
									data.closed
								);

								break;

							case 'LatheGeometry':
							case 'LatheBufferGeometry':

								geometry = new Geometries[ data.type ](
									data.points,
									data.segments,
									data.phiStart,
									data.phiLength
								);

								break;

							case 'PolyhedronGeometry':
							case 'PolyhedronBufferGeometry':

								geometry = new Geometries[ data.type ](
									data.vertices,
									data.indices,
									data.radius,
									data.details
								);

								break;

							case 'ShapeGeometry':
							case 'ShapeBufferGeometry':

								geometryShapes = [];

								for ( var j = 0, jl = data.shapes.length; j < jl; j ++ ) {

									var shape = shapes[ data.shapes[ j ] ];

									geometryShapes.push( shape );

								}

								geometry = new Geometries[ data.type ](
									geometryShapes,
									data.curveSegments
								);

								break;


							case 'ExtrudeGeometry':
							case 'ExtrudeBufferGeometry':

								geometryShapes = [];

								for ( var j$1 = 0, jl$1 = data.shapes.length; j$1 < jl$1; j$1 ++ ) {

									var shape$1 = shapes[ data.shapes[ j$1 ] ];

									geometryShapes.push( shape$1 );

								}

								var extrudePath = data.options.extrudePath;

								if ( extrudePath !== undefined ) {

									data.options.extrudePath = new Curves[ extrudePath.type ]().fromJSON( extrudePath );

								}

								geometry = new Geometries[ data.type ](
									geometryShapes,
									data.options
								);

								break;

							case 'BufferGeometry':
							case 'InstancedBufferGeometry':

								geometry = bufferGeometryLoader.parse( data );

								break;

							case 'Geometry':

								console.error( 'THREE.ObjectLoader: Loading "Geometry" is not supported anymore.' );

								break;

							default:

								console.warn( 'THREE.ObjectLoader: Unsupported geometry type "' + data.type + '"' );

								continue;

						}

						geometry.uuid = data.uuid;

						if ( data.name !== undefined ) { geometry.name = data.name; }
						if ( geometry.isBufferGeometry === true && data.userData !== undefined ) { geometry.userData = data.userData; }

						geometries[ data.uuid ] = geometry;

					}

				}

				return geometries;

			},

			parseMaterials: function ( json, textures ) {

				var cache = {}; // MultiMaterial
				var materials = {};

				if ( json !== undefined ) {

					var loader = new MaterialLoader();
					loader.setTextures( textures );

					for ( var i = 0, l = json.length; i < l; i ++ ) {

						var data = json[ i ];

						if ( data.type === 'MultiMaterial' ) {

							// Deprecated

							var array = [];

							for ( var j = 0; j < data.materials.length; j ++ ) {

								var material = data.materials[ j ];

								if ( cache[ material.uuid ] === undefined ) {

									cache[ material.uuid ] = loader.parse( material );

								}

								array.push( cache[ material.uuid ] );

							}

							materials[ data.uuid ] = array;

						} else {

							if ( cache[ data.uuid ] === undefined ) {

								cache[ data.uuid ] = loader.parse( data );

							}

							materials[ data.uuid ] = cache[ data.uuid ];

						}

					}

				}

				return materials;

			},

			parseAnimations: function ( json ) {

				var animations = [];

				for ( var i = 0; i < json.length; i ++ ) {

					var data = json[ i ];

					var clip = AnimationClip.parse( data );

					if ( data.uuid !== undefined ) { clip.uuid = data.uuid; }

					animations.push( clip );

				}

				return animations;

			},

			parseImages: function ( json, onLoad ) {

				var scope = this;
				var images = {};

				var loader;

				function loadImage( url ) {

					scope.manager.itemStart( url );

					return loader.load( url, function () {

						scope.manager.itemEnd( url );

					}, undefined, function () {

						scope.manager.itemError( url );
						scope.manager.itemEnd( url );

					} );

				}

				if ( json !== undefined && json.length > 0 ) {

					var manager = new LoadingManager( onLoad );

					loader = new ImageLoader( manager );
					loader.setCrossOrigin( this.crossOrigin );

					for ( var i = 0, il = json.length; i < il; i ++ ) {

						var image = json[ i ];
						var url = image.url;

						if ( Array.isArray( url ) ) {

							// load array of images e.g CubeTexture

							images[ image.uuid ] = [];

							for ( var j = 0, jl = url.length; j < jl; j ++ ) {

								var currentUrl = url[ j ];

								var path = /^(\/\/)|([a-z]+:(\/\/)?)/i.test( currentUrl ) ? currentUrl : scope.resourcePath + currentUrl;

								images[ image.uuid ].push( loadImage( path ) );

							}

						} else {

							// load single image

							var path$1 = /^(\/\/)|([a-z]+:(\/\/)?)/i.test( image.url ) ? image.url : scope.resourcePath + image.url;

							images[ image.uuid ] = loadImage( path$1 );

						}

					}

				}

				return images;

			},

			parseTextures: function ( json, images ) {

				function parseConstant( value, type ) {

					if ( typeof value === 'number' ) { return value; }

					console.warn( 'THREE.ObjectLoader.parseTexture: Constant should be in numeric form.', value );

					return type[ value ];

				}

				var textures = {};

				if ( json !== undefined ) {

					for ( var i = 0, l = json.length; i < l; i ++ ) {

						var data = json[ i ];

						if ( data.image === undefined ) {

							console.warn( 'THREE.ObjectLoader: No "image" specified for', data.uuid );

						}

						if ( images[ data.image ] === undefined ) {

							console.warn( 'THREE.ObjectLoader: Undefined image', data.image );

						}

						var texture = (void 0);

						if ( Array.isArray( images[ data.image ] ) ) {

							texture = new CubeTexture( images[ data.image ] );

						} else {

							texture = new Texture( images[ data.image ] );

						}

						texture.needsUpdate = true;

						texture.uuid = data.uuid;

						if ( data.name !== undefined ) { texture.name = data.name; }

						if ( data.mapping !== undefined ) { texture.mapping = parseConstant( data.mapping, TEXTURE_MAPPING ); }

						if ( data.offset !== undefined ) { texture.offset.fromArray( data.offset ); }
						if ( data.repeat !== undefined ) { texture.repeat.fromArray( data.repeat ); }
						if ( data.center !== undefined ) { texture.center.fromArray( data.center ); }
						if ( data.rotation !== undefined ) { texture.rotation = data.rotation; }

						if ( data.wrap !== undefined ) {

							texture.wrapS = parseConstant( data.wrap[ 0 ], TEXTURE_WRAPPING );
							texture.wrapT = parseConstant( data.wrap[ 1 ], TEXTURE_WRAPPING );

						}

						if ( data.format !== undefined ) { texture.format = data.format; }
						if ( data.type !== undefined ) { texture.type = data.type; }
						if ( data.encoding !== undefined ) { texture.encoding = data.encoding; }

						if ( data.minFilter !== undefined ) { texture.minFilter = parseConstant( data.minFilter, TEXTURE_FILTER ); }
						if ( data.magFilter !== undefined ) { texture.magFilter = parseConstant( data.magFilter, TEXTURE_FILTER ); }
						if ( data.anisotropy !== undefined ) { texture.anisotropy = data.anisotropy; }

						if ( data.flipY !== undefined ) { texture.flipY = data.flipY; }

						if ( data.premultiplyAlpha !== undefined ) { texture.premultiplyAlpha = data.premultiplyAlpha; }
						if ( data.unpackAlignment !== undefined ) { texture.unpackAlignment = data.unpackAlignment; }

						textures[ data.uuid ] = texture;

					}

				}

				return textures;

			},

			parseObject: function ( data, geometries, materials ) {

				var object;

				function getGeometry( name ) {

					if ( geometries[ name ] === undefined ) {

						console.warn( 'THREE.ObjectLoader: Undefined geometry', name );

					}

					return geometries[ name ];

				}

				function getMaterial( name ) {

					if ( name === undefined ) { return undefined; }

					if ( Array.isArray( name ) ) {

						var array = [];

						for ( var i = 0, l = name.length; i < l; i ++ ) {

							var uuid = name[ i ];

							if ( materials[ uuid ] === undefined ) {

								console.warn( 'THREE.ObjectLoader: Undefined material', uuid );

							}

							array.push( materials[ uuid ] );

						}

						return array;

					}

					if ( materials[ name ] === undefined ) {

						console.warn( 'THREE.ObjectLoader: Undefined material', name );

					}

					return materials[ name ];

				}

				var geometry, material;

				switch ( data.type ) {

					case 'Scene':

						object = new Scene();

						if ( data.background !== undefined ) {

							if ( Number.isInteger( data.background ) ) {

								object.background = new Color( data.background );

							}

						}

						if ( data.fog !== undefined ) {

							if ( data.fog.type === 'Fog' ) {

								object.fog = new Fog( data.fog.color, data.fog.near, data.fog.far );

							} else if ( data.fog.type === 'FogExp2' ) {

								object.fog = new FogExp2( data.fog.color, data.fog.density );

							}

						}

						break;

					case 'PerspectiveCamera':

						object = new PerspectiveCamera( data.fov, data.aspect, data.near, data.far );

						if ( data.focus !== undefined ) { object.focus = data.focus; }
						if ( data.zoom !== undefined ) { object.zoom = data.zoom; }
						if ( data.filmGauge !== undefined ) { object.filmGauge = data.filmGauge; }
						if ( data.filmOffset !== undefined ) { object.filmOffset = data.filmOffset; }
						if ( data.view !== undefined ) { object.view = Object.assign( {}, data.view ); }

						break;

					case 'OrthographicCamera':

						object = new OrthographicCamera( data.left, data.right, data.top, data.bottom, data.near, data.far );

						if ( data.zoom !== undefined ) { object.zoom = data.zoom; }
						if ( data.view !== undefined ) { object.view = Object.assign( {}, data.view ); }

						break;

					case 'AmbientLight':

						object = new AmbientLight( data.color, data.intensity );

						break;

					case 'DirectionalLight':

						object = new DirectionalLight( data.color, data.intensity );

						break;

					case 'PointLight':

						object = new PointLight( data.color, data.intensity, data.distance, data.decay );

						break;

					case 'RectAreaLight':

						object = new RectAreaLight( data.color, data.intensity, data.width, data.height );

						break;

					case 'SpotLight':

						object = new SpotLight( data.color, data.intensity, data.distance, data.angle, data.penumbra, data.decay );

						break;

					case 'HemisphereLight':

						object = new HemisphereLight( data.color, data.groundColor, data.intensity );

						break;

					case 'LightProbe':

						object = new LightProbe().fromJSON( data );

						break;

					case 'SkinnedMesh':

						console.warn( 'THREE.ObjectLoader.parseObject() does not support SkinnedMesh yet.' );

					case 'Mesh':

						geometry = getGeometry( data.geometry );
						material = getMaterial( data.material );

						object = new Mesh( geometry, material );

						break;

					case 'InstancedMesh':

						geometry = getGeometry( data.geometry );
						material = getMaterial( data.material );
						var count = data.count;
						var instanceMatrix = data.instanceMatrix;

						object = new InstancedMesh( geometry, material, count );
						object.instanceMatrix = new BufferAttribute( new Float32Array( instanceMatrix.array ), 16 );

						break;

					case 'LOD':

						object = new LOD();

						break;

					case 'Line':

						object = new Line( getGeometry( data.geometry ), getMaterial( data.material ), data.mode );

						break;

					case 'LineLoop':

						object = new LineLoop( getGeometry( data.geometry ), getMaterial( data.material ) );

						break;

					case 'LineSegments':

						object = new LineSegments( getGeometry( data.geometry ), getMaterial( data.material ) );

						break;

					case 'PointCloud':
					case 'Points':

						object = new Points( getGeometry( data.geometry ), getMaterial( data.material ) );

						break;

					case 'Sprite':

						object = new Sprite( getMaterial( data.material ) );

						break;

					case 'Group':

						object = new Group();

						break;

					default:

						object = new Object3D();

				}

				object.uuid = data.uuid;

				if ( data.name !== undefined ) { object.name = data.name; }

				if ( data.matrix !== undefined ) {

					object.matrix.fromArray( data.matrix );

					if ( data.matrixAutoUpdate !== undefined ) { object.matrixAutoUpdate = data.matrixAutoUpdate; }
					if ( object.matrixAutoUpdate ) { object.matrix.decompose( object.position, object.quaternion, object.scale ); }

				} else {

					if ( data.position !== undefined ) { object.position.fromArray( data.position ); }
					if ( data.rotation !== undefined ) { object.rotation.fromArray( data.rotation ); }
					if ( data.quaternion !== undefined ) { object.quaternion.fromArray( data.quaternion ); }
					if ( data.scale !== undefined ) { object.scale.fromArray( data.scale ); }

				}

				if ( data.castShadow !== undefined ) { object.castShadow = data.castShadow; }
				if ( data.receiveShadow !== undefined ) { object.receiveShadow = data.receiveShadow; }

				if ( data.shadow ) {

					if ( data.shadow.bias !== undefined ) { object.shadow.bias = data.shadow.bias; }
					if ( data.shadow.normalBias !== undefined ) { object.shadow.normalBias = data.shadow.normalBias; }
					if ( data.shadow.radius !== undefined ) { object.shadow.radius = data.shadow.radius; }
					if ( data.shadow.mapSize !== undefined ) { object.shadow.mapSize.fromArray( data.shadow.mapSize ); }
					if ( data.shadow.camera !== undefined ) { object.shadow.camera = this.parseObject( data.shadow.camera ); }

				}

				if ( data.visible !== undefined ) { object.visible = data.visible; }
				if ( data.frustumCulled !== undefined ) { object.frustumCulled = data.frustumCulled; }
				if ( data.renderOrder !== undefined ) { object.renderOrder = data.renderOrder; }
				if ( data.userData !== undefined ) { object.userData = data.userData; }
				if ( data.layers !== undefined ) { object.layers.mask = data.layers; }

				if ( data.children !== undefined ) {

					var children = data.children;

					for ( var i = 0; i < children.length; i ++ ) {

						object.add( this.parseObject( children[ i ], geometries, materials ) );

					}

				}

				if ( data.type === 'LOD' ) {

					if ( data.autoUpdate !== undefined ) { object.autoUpdate = data.autoUpdate; }

					var levels = data.levels;

					for ( var l = 0; l < levels.length; l ++ ) {

						var level = levels[ l ];
						var child = object.getObjectByProperty( 'uuid', level.object );

						if ( child !== undefined ) {

							object.addLevel( child, level.distance );

						}

					}

				}

				return object;

			}

		} );

		var TEXTURE_MAPPING = {
			UVMapping: UVMapping,
			CubeReflectionMapping: CubeReflectionMapping,
			CubeRefractionMapping: CubeRefractionMapping,
			EquirectangularReflectionMapping: EquirectangularReflectionMapping,
			EquirectangularRefractionMapping: EquirectangularRefractionMapping,
			CubeUVReflectionMapping: CubeUVReflectionMapping,
			CubeUVRefractionMapping: CubeUVRefractionMapping
		};

		var TEXTURE_WRAPPING = {
			RepeatWrapping: RepeatWrapping,
			ClampToEdgeWrapping: ClampToEdgeWrapping,
			MirroredRepeatWrapping: MirroredRepeatWrapping
		};

		var TEXTURE_FILTER = {
			NearestFilter: NearestFilter,
			NearestMipmapNearestFilter: NearestMipmapNearestFilter,
			NearestMipmapLinearFilter: NearestMipmapLinearFilter,
			LinearFilter: LinearFilter,
			LinearMipmapNearestFilter: LinearMipmapNearestFilter,
			LinearMipmapLinearFilter: LinearMipmapLinearFilter
		};

		function ImageBitmapLoader( manager ) {

			if ( typeof createImageBitmap === 'undefined' ) {

				console.warn( 'THREE.ImageBitmapLoader: createImageBitmap() not supported.' );

			}

			if ( typeof fetch === 'undefined' ) {

				console.warn( 'THREE.ImageBitmapLoader: fetch() not supported.' );

			}

			Loader.call( this, manager );

			this.options = { premultiplyAlpha: 'none' };

		}

		ImageBitmapLoader.prototype = Object.assign( Object.create( Loader.prototype ), {

			constructor: ImageBitmapLoader,

			isImageBitmapLoader: true,

			setOptions: function setOptions( options ) {

				this.options = options;

				return this;

			},

			load: function ( url, onLoad, onProgress, onError ) {

				if ( url === undefined ) { url = ''; }

				if ( this.path !== undefined ) { url = this.path + url; }

				url = this.manager.resolveURL( url );

				var scope = this;

				var cached = Cache.get( url );

				if ( cached !== undefined ) {

					scope.manager.itemStart( url );

					setTimeout( function () {

						if ( onLoad ) { onLoad( cached ); }

						scope.manager.itemEnd( url );

					}, 0 );

					return cached;

				}

				fetch( url ).then( function ( res ) {

					return res.blob();

				} ).then( function ( blob ) {

					return createImageBitmap( blob, scope.options );

				} ).then( function ( imageBitmap ) {

					Cache.add( url, imageBitmap );

					if ( onLoad ) { onLoad( imageBitmap ); }

					scope.manager.itemEnd( url );

				} ).catch( function ( e ) {

					if ( onError ) { onError( e ); }

					scope.manager.itemError( url );
					scope.manager.itemEnd( url );

				} );

				scope.manager.itemStart( url );

			}

		} );

		function ShapePath() {

			this.type = 'ShapePath';

			this.color = new Color();

			this.subPaths = [];
			this.currentPath = null;

		}

		Object.assign( ShapePath.prototype, {

			moveTo: function ( x, y ) {

				this.currentPath = new Path();
				this.subPaths.push( this.currentPath );
				this.currentPath.moveTo( x, y );

				return this;

			},

			lineTo: function ( x, y ) {

				this.currentPath.lineTo( x, y );

				return this;

			},

			quadraticCurveTo: function ( aCPx, aCPy, aX, aY ) {

				this.currentPath.quadraticCurveTo( aCPx, aCPy, aX, aY );

				return this;

			},

			bezierCurveTo: function ( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY ) {

				this.currentPath.bezierCurveTo( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY );

				return this;

			},

			splineThru: function ( pts ) {

				this.currentPath.splineThru( pts );

				return this;

			},

			toShapes: function ( isCCW, noHoles ) {

				function toShapesNoHoles( inSubpaths ) {

					var shapes = [];

					for ( var i = 0, l = inSubpaths.length; i < l; i ++ ) {

						var tmpPath = inSubpaths[ i ];

						var tmpShape = new Shape();
						tmpShape.curves = tmpPath.curves;

						shapes.push( tmpShape );

					}

					return shapes;

				}

				function isPointInsidePolygon( inPt, inPolygon ) {

					var polyLen = inPolygon.length;

					// inPt on polygon contour => immediate success    or
					// toggling of inside/outside at every single! intersection point of an edge
					//  with the horizontal line through inPt, left of inPt
					//  not counting lowerY endpoints of edges and whole edges on that line
					var inside = false;
					for ( var p = polyLen - 1, q = 0; q < polyLen; p = q ++ ) {

						var edgeLowPt = inPolygon[ p ];
						var edgeHighPt = inPolygon[ q ];

						var edgeDx = edgeHighPt.x - edgeLowPt.x;
						var edgeDy = edgeHighPt.y - edgeLowPt.y;

						if ( Math.abs( edgeDy ) > Number.EPSILON ) {

							// not parallel
							if ( edgeDy < 0 ) {

								edgeLowPt = inPolygon[ q ]; edgeDx = - edgeDx;
								edgeHighPt = inPolygon[ p ]; edgeDy = - edgeDy;

							}

							if ( ( inPt.y < edgeLowPt.y ) || ( inPt.y > edgeHighPt.y ) ) 		{ continue; }

							if ( inPt.y === edgeLowPt.y ) {

								if ( inPt.x === edgeLowPt.x )		{ return	true; }		// inPt is on contour ?
								// continue;				// no intersection or edgeLowPt => doesn't count !!!

							} else {

								var perpEdge = edgeDy * ( inPt.x - edgeLowPt.x ) - edgeDx * ( inPt.y - edgeLowPt.y );
								if ( perpEdge === 0 )				{ return	true; }		// inPt is on contour ?
								if ( perpEdge < 0 ) 				{ continue; }
								inside = ! inside;		// true intersection left of inPt

							}

						} else {

							// parallel or collinear
							if ( inPt.y !== edgeLowPt.y ) 		{ continue; }			// parallel
							// edge lies on the same horizontal line as inPt
							if ( ( ( edgeHighPt.x <= inPt.x ) && ( inPt.x <= edgeLowPt.x ) ) ||
								 ( ( edgeLowPt.x <= inPt.x ) && ( inPt.x <= edgeHighPt.x ) ) )		{ return	true; }	// inPt: Point on contour !
							// continue;

						}

					}

					return	inside;

				}

				var isClockWise = ShapeUtils.isClockWise;

				var subPaths = this.subPaths;
				if ( subPaths.length === 0 ) { return []; }

				if ( noHoles === true )	{ return	toShapesNoHoles( subPaths ); }


				var solid, tmpPath, tmpShape;
				var shapes = [];

				if ( subPaths.length === 1 ) {

					tmpPath = subPaths[ 0 ];
					tmpShape = new Shape();
					tmpShape.curves = tmpPath.curves;
					shapes.push( tmpShape );
					return shapes;

				}

				var holesFirst = ! isClockWise( subPaths[ 0 ].getPoints() );
				holesFirst = isCCW ? ! holesFirst : holesFirst;

				// console.log("Holes first", holesFirst);

				var betterShapeHoles = [];
				var newShapes = [];
				var newShapeHoles = [];
				var mainIdx = 0;
				var tmpPoints;

				newShapes[ mainIdx ] = undefined;
				newShapeHoles[ mainIdx ] = [];

				for ( var i = 0, l = subPaths.length; i < l; i ++ ) {

					tmpPath = subPaths[ i ];
					tmpPoints = tmpPath.getPoints();
					solid = isClockWise( tmpPoints );
					solid = isCCW ? ! solid : solid;

					if ( solid ) {

						if ( ( ! holesFirst ) && ( newShapes[ mainIdx ] ) )	{ mainIdx ++; }

						newShapes[ mainIdx ] = { s: new Shape(), p: tmpPoints };
						newShapes[ mainIdx ].s.curves = tmpPath.curves;

						if ( holesFirst )	{ mainIdx ++; }
						newShapeHoles[ mainIdx ] = [];

						//console.log('cw', i);

					} else {

						newShapeHoles[ mainIdx ].push( { h: tmpPath, p: tmpPoints[ 0 ] } );

						//console.log('ccw', i);

					}

				}

				// only Holes? -> probably all Shapes with wrong orientation
				if ( ! newShapes[ 0 ] )	{ return	toShapesNoHoles( subPaths ); }


				if ( newShapes.length > 1 ) {

					var ambiguous = false;
					var toChange = [];

					for ( var sIdx = 0, sLen = newShapes.length; sIdx < sLen; sIdx ++ ) {

						betterShapeHoles[ sIdx ] = [];

					}

					for ( var sIdx$1 = 0, sLen$1 = newShapes.length; sIdx$1 < sLen$1; sIdx$1 ++ ) {

						var sho = newShapeHoles[ sIdx$1 ];

						for ( var hIdx = 0; hIdx < sho.length; hIdx ++ ) {

							var ho = sho[ hIdx ];
							var hole_unassigned = true;

							for ( var s2Idx = 0; s2Idx < newShapes.length; s2Idx ++ ) {

								if ( isPointInsidePolygon( ho.p, newShapes[ s2Idx ].p ) ) {

									if ( sIdx$1 !== s2Idx )	{ toChange.push( { froms: sIdx$1, tos: s2Idx, hole: hIdx } ); }
									if ( hole_unassigned ) {

										hole_unassigned = false;
										betterShapeHoles[ s2Idx ].push( ho );

									} else {

										ambiguous = true;

									}

								}

							}

							if ( hole_unassigned ) {

								betterShapeHoles[ sIdx$1 ].push( ho );

							}

						}

					}
					// console.log("ambiguous: ", ambiguous);

					if ( toChange.length > 0 ) {

						// console.log("to change: ", toChange);
						if ( ! ambiguous )	{ newShapeHoles = betterShapeHoles; }

					}

				}

				var tmpHoles;

				for ( var i$1 = 0, il = newShapes.length; i$1 < il; i$1 ++ ) {

					tmpShape = newShapes[ i$1 ].s;
					shapes.push( tmpShape );
					tmpHoles = newShapeHoles[ i$1 ];

					for ( var j = 0, jl = tmpHoles.length; j < jl; j ++ ) {

						tmpShape.holes.push( tmpHoles[ j ].h );

					}

				}

				//console.log("shape", shapes);

				return shapes;

			}

		} );

		function Font( data ) {

			this.type = 'Font';

			this.data = data;

		}

		Object.assign( Font.prototype, {

			isFont: true,

			generateShapes: function ( text, size ) {

				if ( size === undefined ) { size = 100; }

				var shapes = [];
				var paths = createPaths( text, size, this.data );

				for ( var p = 0, pl = paths.length; p < pl; p ++ ) {

					Array.prototype.push.apply( shapes, paths[ p ].toShapes() );

				}

				return shapes;

			}

		} );

		function createPaths( text, size, data ) {

			var chars = Array.from ? Array.from( text ) : String( text ).split( '' ); // workaround for IE11, see #13988
			var scale = size / data.resolution;
			var line_height = ( data.boundingBox.yMax - data.boundingBox.yMin + data.underlineThickness ) * scale;

			var paths = [];

			var offsetX = 0, offsetY = 0;

			for ( var i = 0; i < chars.length; i ++ ) {

				var char = chars[ i ];

				if ( char === '\n' ) {

					offsetX = 0;
					offsetY -= line_height;

				} else {

					var ret = createPath( char, scale, offsetX, offsetY, data );
					offsetX += ret.offsetX;
					paths.push( ret.path );

				}

			}

			return paths;

		}

		function createPath( char, scale, offsetX, offsetY, data ) {

			var glyph = data.glyphs[ char ] || data.glyphs[ '?' ];

			if ( ! glyph ) {

				console.error( 'THREE.Font: character "' + char + '" does not exists in font family ' + data.familyName + '.' );

				return;

			}

			var path = new ShapePath();

			var x, y, cpx, cpy, cpx1, cpy1, cpx2, cpy2;

			if ( glyph.o ) {

				var outline = glyph._cachedOutline || ( glyph._cachedOutline = glyph.o.split( ' ' ) );

				for ( var i = 0, l = outline.length; i < l; ) {

					var action = outline[ i ++ ];

					switch ( action ) {

						case 'm': // moveTo

							x = outline[ i ++ ] * scale + offsetX;
							y = outline[ i ++ ] * scale + offsetY;

							path.moveTo( x, y );

							break;

						case 'l': // lineTo

							x = outline[ i ++ ] * scale + offsetX;
							y = outline[ i ++ ] * scale + offsetY;

							path.lineTo( x, y );

							break;

						case 'q': // quadraticCurveTo

							cpx = outline[ i ++ ] * scale + offsetX;
							cpy = outline[ i ++ ] * scale + offsetY;
							cpx1 = outline[ i ++ ] * scale + offsetX;
							cpy1 = outline[ i ++ ] * scale + offsetY;

							path.quadraticCurveTo( cpx1, cpy1, cpx, cpy );

							break;

						case 'b': // bezierCurveTo

							cpx = outline[ i ++ ] * scale + offsetX;
							cpy = outline[ i ++ ] * scale + offsetY;
							cpx1 = outline[ i ++ ] * scale + offsetX;
							cpy1 = outline[ i ++ ] * scale + offsetY;
							cpx2 = outline[ i ++ ] * scale + offsetX;
							cpy2 = outline[ i ++ ] * scale + offsetY;

							path.bezierCurveTo( cpx1, cpy1, cpx2, cpy2, cpx, cpy );

							break;

					}

				}

			}

			return { offsetX: glyph.ha * scale, path: path };

		}

		function FontLoader( manager ) {

			Loader.call( this, manager );

		}

		FontLoader.prototype = Object.assign( Object.create( Loader.prototype ), {

			constructor: FontLoader,

			load: function ( url, onLoad, onProgress, onError ) {

				var scope = this;

				var loader = new FileLoader( this.manager );
				loader.setPath( this.path );
				loader.setRequestHeader( this.requestHeader );
				loader.load( url, function ( text ) {

					var json;

					try {

						json = JSON.parse( text );

					} catch ( e ) {

						console.warn( 'THREE.FontLoader: typeface.js support is being deprecated. Use typeface.json instead.' );
						json = JSON.parse( text.substring( 65, text.length - 2 ) );

					}

					var font = scope.parse( json );

					if ( onLoad ) { onLoad( font ); }

				}, onProgress, onError );

			},

			parse: function ( json ) {

				return new Font( json );

			}

		} );

		var _context;

		var AudioContext = {

			getContext: function () {

				if ( _context === undefined ) {

					_context = new ( window.AudioContext || window.webkitAudioContext )();

				}

				return _context;

			},

			setContext: function ( value ) {

				_context = value;

			}

		};

		function AudioLoader( manager ) {

			Loader.call( this, manager );

		}

		AudioLoader.prototype = Object.assign( Object.create( Loader.prototype ), {

			constructor: AudioLoader,

			load: function ( url, onLoad, onProgress, onError ) {

				var scope = this;

				var loader = new FileLoader( scope.manager );
				loader.setResponseType( 'arraybuffer' );
				loader.setPath( scope.path );
				loader.setRequestHeader( scope.requestHeader );
				loader.load( url, function ( buffer ) {

					try {

						// Create a copy of the buffer. The `decodeAudioData` method
						// detaches the buffer when complete, preventing reuse.
						var bufferCopy = buffer.slice( 0 );

						var context = AudioContext.getContext();
						context.decodeAudioData( bufferCopy, function ( audioBuffer ) {

							onLoad( audioBuffer );

						} );

					} catch ( e ) {

						if ( onError ) {

							onError( e );

						} else {

							console.error( e );

						}

						scope.manager.itemError( url );

					}

				}, onProgress, onError );

			}

		} );

		function HemisphereLightProbe( skyColor, groundColor, intensity ) {

			LightProbe.call( this, undefined, intensity );

			var color1 = new Color().set( skyColor );
			var color2 = new Color().set( groundColor );

			var sky = new Vector3( color1.r, color1.g, color1.b );
			var ground = new Vector3( color2.r, color2.g, color2.b );

			// without extra factor of PI in the shader, should = 1 / Math.sqrt( Math.PI );
			var c0 = Math.sqrt( Math.PI );
			var c1 = c0 * Math.sqrt( 0.75 );

			this.sh.coefficients[ 0 ].copy( sky ).add( ground ).multiplyScalar( c0 );
			this.sh.coefficients[ 1 ].copy( sky ).sub( ground ).multiplyScalar( c1 );

		}

		HemisphereLightProbe.prototype = Object.assign( Object.create( LightProbe.prototype ), {

			constructor: HemisphereLightProbe,

			isHemisphereLightProbe: true,

			copy: function ( source ) { // modifying colors not currently supported

				LightProbe.prototype.copy.call( this, source );

				return this;

			},

			toJSON: function ( meta ) {

				var data = LightProbe.prototype.toJSON.call( this, meta );

				// data.sh = this.sh.toArray(); // todo

				return data;

			}

		} );

		function AmbientLightProbe( color, intensity ) {

			LightProbe.call( this, undefined, intensity );

			var color1 = new Color().set( color );

			// without extra factor of PI in the shader, would be 2 / Math.sqrt( Math.PI );
			this.sh.coefficients[ 0 ].set( color1.r, color1.g, color1.b ).multiplyScalar( 2 * Math.sqrt( Math.PI ) );

		}

		AmbientLightProbe.prototype = Object.assign( Object.create( LightProbe.prototype ), {

			constructor: AmbientLightProbe,

			isAmbientLightProbe: true,

			copy: function ( source ) { // modifying color not currently supported

				LightProbe.prototype.copy.call( this, source );

				return this;

			},

			toJSON: function ( meta ) {

				var data = LightProbe.prototype.toJSON.call( this, meta );

				// data.sh = this.sh.toArray(); // todo

				return data;

			}

		} );

		var _eyeRight = new Matrix4();
		var _eyeLeft = new Matrix4();

		function StereoCamera() {

			this.type = 'StereoCamera';

			this.aspect = 1;

			this.eyeSep = 0.064;

			this.cameraL = new PerspectiveCamera();
			this.cameraL.layers.enable( 1 );
			this.cameraL.matrixAutoUpdate = false;

			this.cameraR = new PerspectiveCamera();
			this.cameraR.layers.enable( 2 );
			this.cameraR.matrixAutoUpdate = false;

			this._cache = {
				focus: null,
				fov: null,
				aspect: null,
				near: null,
				far: null,
				zoom: null,
				eyeSep: null
			};

		}

		Object.assign( StereoCamera.prototype, {

			update: function ( camera ) {

				var cache = this._cache;

				var needsUpdate = cache.focus !== camera.focus || cache.fov !== camera.fov ||
					cache.aspect !== camera.aspect * this.aspect || cache.near !== camera.near ||
					cache.far !== camera.far || cache.zoom !== camera.zoom || cache.eyeSep !== this.eyeSep;

				if ( needsUpdate ) {

					cache.focus = camera.focus;
					cache.fov = camera.fov;
					cache.aspect = camera.aspect * this.aspect;
					cache.near = camera.near;
					cache.far = camera.far;
					cache.zoom = camera.zoom;
					cache.eyeSep = this.eyeSep;

					// Off-axis stereoscopic effect based on
					// http://paulbourke.net/stereographics/stereorender/

					var projectionMatrix = camera.projectionMatrix.clone();
					var eyeSepHalf = cache.eyeSep / 2;
					var eyeSepOnProjection = eyeSepHalf * cache.near / cache.focus;
					var ymax = ( cache.near * Math.tan( MathUtils.DEG2RAD * cache.fov * 0.5 ) ) / cache.zoom;
					var xmin, xmax;

					// translate xOffset

					_eyeLeft.elements[ 12 ] = - eyeSepHalf;
					_eyeRight.elements[ 12 ] = eyeSepHalf;

					// for left eye

					xmin = - ymax * cache.aspect + eyeSepOnProjection;
					xmax = ymax * cache.aspect + eyeSepOnProjection;

					projectionMatrix.elements[ 0 ] = 2 * cache.near / ( xmax - xmin );
					projectionMatrix.elements[ 8 ] = ( xmax + xmin ) / ( xmax - xmin );

					this.cameraL.projectionMatrix.copy( projectionMatrix );

					// for right eye

					xmin = - ymax * cache.aspect - eyeSepOnProjection;
					xmax = ymax * cache.aspect - eyeSepOnProjection;

					projectionMatrix.elements[ 0 ] = 2 * cache.near / ( xmax - xmin );
					projectionMatrix.elements[ 8 ] = ( xmax + xmin ) / ( xmax - xmin );

					this.cameraR.projectionMatrix.copy( projectionMatrix );

				}

				this.cameraL.matrixWorld.copy( camera.matrixWorld ).multiply( _eyeLeft );
				this.cameraR.matrixWorld.copy( camera.matrixWorld ).multiply( _eyeRight );

			}

		} );

		var Clock = function Clock( autoStart ) {

			this.autoStart = ( autoStart !== undefined ) ? autoStart : true;

			this.startTime = 0;
			this.oldTime = 0;
			this.elapsedTime = 0;

			this.running = false;

		};

		Clock.prototype.start = function start () {

			this.startTime = ( typeof performance === 'undefined' ? Date : performance ).now(); // see #10732

			this.oldTime = this.startTime;
			this.elapsedTime = 0;
			this.running = true;

		};

		Clock.prototype.stop = function stop () {

			this.getElapsedTime();
			this.running = false;
			this.autoStart = false;

		};

		Clock.prototype.getElapsedTime = function getElapsedTime () {

			this.getDelta();
			return this.elapsedTime;

		};

		Clock.prototype.getDelta = function getDelta () {

			var diff = 0;

			if ( this.autoStart && ! this.running ) {

				this.start();
				return 0;

			}

			if ( this.running ) {

				var newTime = ( typeof performance === 'undefined' ? Date : performance ).now();

				diff = ( newTime - this.oldTime ) / 1000;
				this.oldTime = newTime;

				this.elapsedTime += diff;

			}

			return diff;

		};

		var _position$2 = new Vector3();
		var _quaternion$3 = new Quaternion();
		var _scale$1 = new Vector3();
		var _orientation = new Vector3();

			function AudioListener() {

				Object3D.call(this);

				this.type = 'AudioListener';

				this.context = AudioContext.getContext();

				this.gain = this.context.createGain();
				this.gain.connect( this.context.destination );

				this.filter = null;

				this.timeDelta = 0;

				// private

				this._clock = new Clock();

			}

			AudioListener.prototype = Object.create( Object3D.prototype );
			AudioListener.prototype.constructor = AudioListener;

			AudioListener.prototype.getInput = function getInput () {

				return this.gain;

			};

			AudioListener.prototype.removeFilter = function removeFilter () {

				if ( this.filter !== null ) {

					this.gain.disconnect( this.filter );
					this.filter.disconnect( this.context.destination );
					this.gain.connect( this.context.destination );
					this.filter = null;

				}

				return this;

			};

			AudioListener.prototype.getFilter = function getFilter () {

				return this.filter;

			};

			AudioListener.prototype.setFilter = function setFilter ( value ) {

				if ( this.filter !== null ) {

					this.gain.disconnect( this.filter );
					this.filter.disconnect( this.context.destination );

				} else {

					this.gain.disconnect( this.context.destination );

				}

				this.filter = value;
				this.gain.connect( this.filter );
				this.filter.connect( this.context.destination );

				return this;

			};

			AudioListener.prototype.getMasterVolume = function getMasterVolume () {

				return this.gain.gain.value;

			};

			AudioListener.prototype.setMasterVolume = function setMasterVolume ( value ) {

				this.gain.gain.setTargetAtTime( value, this.context.currentTime, 0.01 );

				return this;

			};

			AudioListener.prototype.updateMatrixWorld = function updateMatrixWorld ( force ) {

				Object3D.prototype.updateMatrixWorld.call( this, force );

				var listener = this.context.listener;
				var up = this.up;

				this.timeDelta = this._clock.getDelta();

				this.matrixWorld.decompose( _position$2, _quaternion$3, _scale$1 );

				_orientation.set( 0, 0, - 1 ).applyQuaternion( _quaternion$3 );

				if ( listener.positionX ) {

					// code path for Chrome (see #14393)

					var endTime = this.context.currentTime + this.timeDelta;

					listener.positionX.linearRampToValueAtTime( _position$2.x, endTime );
					listener.positionY.linearRampToValueAtTime( _position$2.y, endTime );
					listener.positionZ.linearRampToValueAtTime( _position$2.z, endTime );
					listener.forwardX.linearRampToValueAtTime( _orientation.x, endTime );
					listener.forwardY.linearRampToValueAtTime( _orientation.y, endTime );
					listener.forwardZ.linearRampToValueAtTime( _orientation.z, endTime );
					listener.upX.linearRampToValueAtTime( up.x, endTime );
					listener.upY.linearRampToValueAtTime( up.y, endTime );
					listener.upZ.linearRampToValueAtTime( up.z, endTime );

				} else {

					listener.setPosition( _position$2.x, _position$2.y, _position$2.z );
					listener.setOrientation( _orientation.x, _orientation.y, _orientation.z, up.x, up.y, up.z );

				}

			};

		function Audio( listener ) {

				Object3D.call(this);

				this.type = 'Audio';

				this.listener = listener;
				this.context = listener.context;

				this.gain = this.context.createGain();
				this.gain.connect( listener.getInput() );

				this.autoplay = false;

				this.buffer = null;
				this.detune = 0;
				this.loop = false;
				this.loopStart = 0;
				this.loopEnd = 0;
				this.offset = 0;
				this.duration = undefined;
				this.playbackRate = 1;
				this.isPlaying = false;
				this.hasPlaybackControl = true;
				this.source = null;
				this.sourceType = 'empty';

				this._startedAt = 0;
				this._progress = 0;
				this._connected = false;

				this.filters = [];

			}

			Audio.prototype = Object.create( Object3D.prototype );
			Audio.prototype.constructor = Audio;

			Audio.prototype.getOutput = function getOutput () {

				return this.gain;

			};

			Audio.prototype.setNodeSource = function setNodeSource ( audioNode ) {

				this.hasPlaybackControl = false;
				this.sourceType = 'audioNode';
				this.source = audioNode;
				this.connect();

				return this;

			};

			Audio.prototype.setMediaElementSource = function setMediaElementSource ( mediaElement ) {

				this.hasPlaybackControl = false;
				this.sourceType = 'mediaNode';
				this.source = this.context.createMediaElementSource( mediaElement );
				this.connect();

				return this;

			};

			Audio.prototype.setMediaStreamSource = function setMediaStreamSource ( mediaStream ) {

				this.hasPlaybackControl = false;
				this.sourceType = 'mediaStreamNode';
				this.source = this.context.createMediaStreamSource( mediaStream );
				this.connect();

				return this;

			};

			Audio.prototype.setBuffer = function setBuffer ( audioBuffer ) {

				this.buffer = audioBuffer;
				this.sourceType = 'buffer';

				if ( this.autoplay ) { this.play(); }

				return this;

			};

			Audio.prototype.play = function play ( delay ) {

				if ( delay === undefined ) { delay = 0; }

				if ( this.isPlaying === true ) {

					console.warn( 'THREE.Audio: Audio is already playing.' );
					return;

				}

				if ( this.hasPlaybackControl === false ) {

					console.warn( 'THREE.Audio: this Audio has no playback control.' );
					return;

				}

				this._startedAt = this.context.currentTime + delay;

				var source = this.context.createBufferSource();
				source.buffer = this.buffer;
				source.loop = this.loop;
				source.loopStart = this.loopStart;
				source.loopEnd = this.loopEnd;
				source.onended = this.onEnded.bind( this );
				source.start( this._startedAt, this._progress + this.offset, this.duration );

				this.isPlaying = true;

				this.source = source;

				this.setDetune( this.detune );
				this.setPlaybackRate( this.playbackRate );

				return this.connect();

			};

			Audio.prototype.pause = function pause () {

				if ( this.hasPlaybackControl === false ) {

					console.warn( 'THREE.Audio: this Audio has no playback control.' );
					return;

				}

				if ( this.isPlaying === true ) {

					// update current progress

					this._progress += Math.max( this.context.currentTime - this._startedAt, 0 ) * this.playbackRate;

					if ( this.loop === true ) {

						// ensure _progress does not exceed duration with looped audios

						this._progress = this._progress % ( this.duration || this.buffer.duration );

					}

					this.source.stop();
					this.source.onended = null;

					this.isPlaying = false;

				}

				return this;

			};

			Audio.prototype.stop = function stop () {

				if ( this.hasPlaybackControl === false ) {

					console.warn( 'THREE.Audio: this Audio has no playback control.' );
					return;

				}

				this._progress = 0;

				this.source.stop();
				this.source.onended = null;
				this.isPlaying = false;

				return this;

			};

			Audio.prototype.connect = function connect () {

				if ( this.filters.length > 0 ) {

					this.source.connect( this.filters[ 0 ] );

					for ( var i = 1, l = this.filters.length; i < l; i ++ ) {

						this.filters[ i - 1 ].connect( this.filters[ i ] );

					}

					this.filters[ this.filters.length - 1 ].connect( this.getOutput() );

				} else {

					this.source.connect( this.getOutput() );

				}

				this._connected = true;

				return this;

			};

			Audio.prototype.disconnect = function disconnect () {

				if ( this.filters.length > 0 ) {

					this.source.disconnect( this.filters[ 0 ] );

					for ( var i = 1, l = this.filters.length; i < l; i ++ ) {

						this.filters[ i - 1 ].disconnect( this.filters[ i ] );

					}

					this.filters[ this.filters.length - 1 ].disconnect( this.getOutput() );

				} else {

					this.source.disconnect( this.getOutput() );

				}

				this._connected = false;

				return this;

			};

			Audio.prototype.getFilters = function getFilters () {

				return this.filters;

			};

			Audio.prototype.setFilters = function setFilters ( value ) {

				if ( ! value ) { value = []; }

				if ( this._connected === true ) {

					this.disconnect();
					this.filters = value;
					this.connect();

				} else {

					this.filters = value;

				}

				return this;

			};

			Audio.prototype.setDetune = function setDetune ( value ) {

				this.detune = value;

				if ( this.source.detune === undefined ) { return; } // only set detune when available

				if ( this.isPlaying === true ) {

					this.source.detune.setTargetAtTime( this.detune, this.context.currentTime, 0.01 );

				}

				return this;

			};

			Audio.prototype.getDetune = function getDetune () {

				return this.detune;

			};

			Audio.prototype.getFilter = function getFilter () {

				return this.getFilters()[ 0 ];

			};

			Audio.prototype.setFilter = function setFilter ( filter ) {

				return this.setFilters( filter ? [ filter ] : [] );

			};

			Audio.prototype.setPlaybackRate = function setPlaybackRate ( value ) {

				if ( this.hasPlaybackControl === false ) {

					console.warn( 'THREE.Audio: this Audio has no playback control.' );
					return;

				}

				this.playbackRate = value;

				if ( this.isPlaying === true ) {

					this.source.playbackRate.setTargetAtTime( this.playbackRate, this.context.currentTime, 0.01 );

				}

				return this;

			};

			Audio.prototype.getPlaybackRate = function getPlaybackRate () {

				return this.playbackRate;

			};

			Audio.prototype.onEnded = function onEnded () {

				this.isPlaying = false;

			};

			Audio.prototype.getLoop = function getLoop () {

				if ( this.hasPlaybackControl === false ) {

					console.warn( 'THREE.Audio: this Audio has no playback control.' );
					return false;

				}

				return this.loop;

			};

			Audio.prototype.setLoop = function setLoop ( value ) {

				if ( this.hasPlaybackControl === false ) {

					console.warn( 'THREE.Audio: this Audio has no playback control.' );
					return;

				}

				this.loop = value;

				if ( this.isPlaying === true ) {

					this.source.loop = this.loop;

				}

				return this;

			};

			Audio.prototype.setLoopStart = function setLoopStart ( value ) {

				this.loopStart = value;

				return this;

			};

			Audio.prototype.setLoopEnd = function setLoopEnd ( value ) {

				this.loopEnd = value;

				return this;

			};

			Audio.prototype.getVolume = function getVolume () {

				return this.gain.gain.value;

			};

			Audio.prototype.setVolume = function setVolume ( value ) {

				this.gain.gain.setTargetAtTime( value, this.context.currentTime, 0.01 );

				return this;

			};

		var _position$3 = new Vector3();
		var _quaternion$4 = new Quaternion();
		var _scale$2 = new Vector3();
		var _orientation$1 = new Vector3();

			function PositionalAudio( listener ) {

				Audio.call( this, listener );

				this.panner = this.context.createPanner();
				this.panner.panningModel = 'HRTF';
				this.panner.connect( this.gain );

			}

			PositionalAudio.prototype = Object.create( Audio.prototype );
			PositionalAudio.prototype.constructor = PositionalAudio;

			PositionalAudio.prototype.getOutput = function getOutput () {

				return this.panner;

			};

			PositionalAudio.prototype.getRefDistance = function getRefDistance () {

				return this.panner.refDistance;

			};

			PositionalAudio.prototype.setRefDistance = function setRefDistance ( value ) {

				this.panner.refDistance = value;

				return this;

			};

			PositionalAudio.prototype.getRolloffFactor = function getRolloffFactor () {

				return this.panner.rolloffFactor;

			};

			PositionalAudio.prototype.setRolloffFactor = function setRolloffFactor ( value ) {

				this.panner.rolloffFactor = value;

				return this;

			};

			PositionalAudio.prototype.getDistanceModel = function getDistanceModel () {

				return this.panner.distanceModel;

			};

			PositionalAudio.prototype.setDistanceModel = function setDistanceModel ( value ) {

				this.panner.distanceModel = value;

				return this;

			};

			PositionalAudio.prototype.getMaxDistance = function getMaxDistance () {

				return this.panner.maxDistance;

			};

			PositionalAudio.prototype.setMaxDistance = function setMaxDistance ( value ) {

				this.panner.maxDistance = value;

				return this;

			};

			PositionalAudio.prototype.setDirectionalCone = function setDirectionalCone ( coneInnerAngle, coneOuterAngle, coneOuterGain ) {

				this.panner.coneInnerAngle = coneInnerAngle;
				this.panner.coneOuterAngle = coneOuterAngle;
				this.panner.coneOuterGain = coneOuterGain;

				return this;

			};

			PositionalAudio.prototype.updateMatrixWorld = function updateMatrixWorld ( force ) {

				Audio.prototype.updateMatrixWorld.call( this, force );

				if ( this.hasPlaybackControl === true && this.isPlaying === false ) { return; }

				this.matrixWorld.decompose( _position$3, _quaternion$4, _scale$2 );

				_orientation$1.set( 0, 0, 1 ).applyQuaternion( _quaternion$4 );

				var panner = this.panner;

				if ( panner.positionX ) {

					// code path for Chrome and Firefox (see #14393)

					var endTime = this.context.currentTime + this.listener.timeDelta;

					panner.positionX.linearRampToValueAtTime( _position$3.x, endTime );
					panner.positionY.linearRampToValueAtTime( _position$3.y, endTime );
					panner.positionZ.linearRampToValueAtTime( _position$3.z, endTime );
					panner.orientationX.linearRampToValueAtTime( _orientation$1.x, endTime );
					panner.orientationY.linearRampToValueAtTime( _orientation$1.y, endTime );
					panner.orientationZ.linearRampToValueAtTime( _orientation$1.z, endTime );

				} else {

					panner.setPosition( _position$3.x, _position$3.y, _position$3.z );
					panner.setOrientation( _orientation$1.x, _orientation$1.y, _orientation$1.z );

				}

			};

		var AudioAnalyser = function AudioAnalyser( audio, fftSize ) {

			this.analyser = audio.context.createAnalyser();
			this.analyser.fftSize = fftSize !== undefined ? fftSize : 2048;

			this.data = new Uint8Array( this.analyser.frequencyBinCount );

			audio.getOutput().connect( this.analyser );

		};


		AudioAnalyser.prototype.getFrequencyData = function getFrequencyData () {

			this.analyser.getByteFrequencyData( this.data );

			return this.data;

		};

		AudioAnalyser.prototype.getAverageFrequency = function getAverageFrequency () {

			var value = 0;
			var data = this.getFrequencyData();

			for ( var i = 0; i < data.length; i ++ ) {

				value += data[ i ];

			}

			return value / data.length;

		};

		function PropertyMixer( binding, typeName, valueSize ) {

			this.binding = binding;
			this.valueSize = valueSize;

			var mixFunction,
				mixFunctionAdditive,
				setIdentity;

			// buffer layout: [ incoming | accu0 | accu1 | orig | addAccu | (optional work) ]
			//
			// interpolators can use .buffer as their .result
			// the data then goes to 'incoming'
			//
			// 'accu0' and 'accu1' are used frame-interleaved for
			// the cumulative result and are compared to detect
			// changes
			//
			// 'orig' stores the original state of the property
			//
			// 'add' is used for additive cumulative results
			//
			// 'work' is optional and is only present for quaternion types. It is used
			// to store intermediate quaternion multiplication results

			switch ( typeName ) {

				case 'quaternion':
					mixFunction = this._slerp;
					mixFunctionAdditive = this._slerpAdditive;
					setIdentity = this._setAdditiveIdentityQuaternion;

					this.buffer = new Float64Array( valueSize * 6 );
					this._workIndex = 5;
					break;

				case 'string':
				case 'bool':
					mixFunction = this._select;

					// Use the regular mix function and for additive on these types,
					// additive is not relevant for non-numeric types
					mixFunctionAdditive = this._select;

					setIdentity = this._setAdditiveIdentityOther;

					this.buffer = new Array( valueSize * 5 );
					break;

				default:
					mixFunction = this._lerp;
					mixFunctionAdditive = this._lerpAdditive;
					setIdentity = this._setAdditiveIdentityNumeric;

					this.buffer = new Float64Array( valueSize * 5 );

			}

			this._mixBufferRegion = mixFunction;
			this._mixBufferRegionAdditive = mixFunctionAdditive;
			this._setIdentity = setIdentity;
			this._origIndex = 3;
			this._addIndex = 4;

			this.cumulativeWeight = 0;
			this.cumulativeWeightAdditive = 0;

			this.useCount = 0;
			this.referenceCount = 0;

		}

		Object.assign( PropertyMixer.prototype, {

			// accumulate data in the 'incoming' region into 'accu<i>'
			accumulate: function ( accuIndex, weight ) {

				// note: happily accumulating nothing when weight = 0, the caller knows
				// the weight and shouldn't have made the call in the first place

				var buffer = this.buffer,
					stride = this.valueSize,
					offset = accuIndex * stride + stride;

				var currentWeight = this.cumulativeWeight;

				if ( currentWeight === 0 ) {

					// accuN := incoming * weight

					for ( var i = 0; i !== stride; ++ i ) {

						buffer[ offset + i ] = buffer[ i ];

					}

					currentWeight = weight;

				} else {

					// accuN := accuN + incoming * weight

					currentWeight += weight;
					var mix = weight / currentWeight;
					this._mixBufferRegion( buffer, offset, 0, mix, stride );

				}

				this.cumulativeWeight = currentWeight;

			},

			// accumulate data in the 'incoming' region into 'add'
			accumulateAdditive: function ( weight ) {

				var buffer = this.buffer,
					stride = this.valueSize,
					offset = stride * this._addIndex;

				if ( this.cumulativeWeightAdditive === 0 ) {

					// add = identity

					this._setIdentity();

				}

				// add := add + incoming * weight

				this._mixBufferRegionAdditive( buffer, offset, 0, weight, stride );
				this.cumulativeWeightAdditive += weight;

			},

			// apply the state of 'accu<i>' to the binding when accus differ
			apply: function ( accuIndex ) {

				var stride = this.valueSize,
					buffer = this.buffer,
					offset = accuIndex * stride + stride,

					weight = this.cumulativeWeight,
					weightAdditive = this.cumulativeWeightAdditive,

					binding = this.binding;

				this.cumulativeWeight = 0;
				this.cumulativeWeightAdditive = 0;

				if ( weight < 1 ) {

					// accuN := accuN + original * ( 1 - cumulativeWeight )

					var originalValueOffset = stride * this._origIndex;

					this._mixBufferRegion(
						buffer, offset, originalValueOffset, 1 - weight, stride );

				}

				if ( weightAdditive > 0 ) {

					// accuN := accuN + additive accuN

					this._mixBufferRegionAdditive( buffer, offset, this._addIndex * stride, 1, stride );

				}

				for ( var i = stride, e = stride + stride; i !== e; ++ i ) {

					if ( buffer[ i ] !== buffer[ i + stride ] ) {

						// value has changed -> update scene graph

						binding.setValue( buffer, offset );
						break;

					}

				}

			},

			// remember the state of the bound property and copy it to both accus
			saveOriginalState: function () {

				var binding = this.binding;

				var buffer = this.buffer,
					stride = this.valueSize,

					originalValueOffset = stride * this._origIndex;

				binding.getValue( buffer, originalValueOffset );

				// accu[0..1] := orig -- initially detect changes against the original
				for ( var i = stride, e = originalValueOffset; i !== e; ++ i ) {

					buffer[ i ] = buffer[ originalValueOffset + ( i % stride ) ];

				}

				// Add to identity for additive
				this._setIdentity();

				this.cumulativeWeight = 0;
				this.cumulativeWeightAdditive = 0;

			},

			// apply the state previously taken via 'saveOriginalState' to the binding
			restoreOriginalState: function () {

				var originalValueOffset = this.valueSize * 3;
				this.binding.setValue( this.buffer, originalValueOffset );

			},

			_setAdditiveIdentityNumeric: function () {

				var startIndex = this._addIndex * this.valueSize;
				var endIndex = startIndex + this.valueSize;

				for ( var i = startIndex; i < endIndex; i ++ ) {

					this.buffer[ i ] = 0;

				}

			},

			_setAdditiveIdentityQuaternion: function () {

				this._setAdditiveIdentityNumeric();
				this.buffer[ this._addIndex * this.valueSize + 3 ] = 1;

			},

			_setAdditiveIdentityOther: function () {

				var startIndex = this._origIndex * this.valueSize;
				var targetIndex = this._addIndex * this.valueSize;

				for ( var i = 0; i < this.valueSize; i ++ ) {

					this.buffer[ targetIndex + i ] = this.buffer[ startIndex + i ];

				}

			},


			// mix functions

			_select: function ( buffer, dstOffset, srcOffset, t, stride ) {

				if ( t >= 0.5 ) {

					for ( var i = 0; i !== stride; ++ i ) {

						buffer[ dstOffset + i ] = buffer[ srcOffset + i ];

					}

				}

			},

			_slerp: function ( buffer, dstOffset, srcOffset, t ) {

				Quaternion.slerpFlat( buffer, dstOffset, buffer, dstOffset, buffer, srcOffset, t );

			},

			_slerpAdditive: function ( buffer, dstOffset, srcOffset, t, stride ) {

				var workOffset = this._workIndex * stride;

				// Store result in intermediate buffer offset
				Quaternion.multiplyQuaternionsFlat( buffer, workOffset, buffer, dstOffset, buffer, srcOffset );

				// Slerp to the intermediate result
				Quaternion.slerpFlat( buffer, dstOffset, buffer, dstOffset, buffer, workOffset, t );

			},

			_lerp: function ( buffer, dstOffset, srcOffset, t, stride ) {

				var s = 1 - t;

				for ( var i = 0; i !== stride; ++ i ) {

					var j = dstOffset + i;

					buffer[ j ] = buffer[ j ] * s + buffer[ srcOffset + i ] * t;

				}

			},

			_lerpAdditive: function ( buffer, dstOffset, srcOffset, t, stride ) {

				for ( var i = 0; i !== stride; ++ i ) {

					var j = dstOffset + i;

					buffer[ j ] = buffer[ j ] + buffer[ srcOffset + i ] * t;

				}

			}

		} );

		// Characters [].:/ are reserved for track binding syntax.
		var _RESERVED_CHARS_RE = '\\[\\]\\.:\\/';
		var _reservedRe = new RegExp( '[' + _RESERVED_CHARS_RE + ']', 'g' );

		// Attempts to allow node names from any language. ES5's `\w` regexp matches
		// only latin characters, and the unicode \p{L} is not yet supported. So
		// instead, we exclude reserved characters and match everything else.
		var _wordChar = '[^' + _RESERVED_CHARS_RE + ']';
		var _wordCharOrDot = '[^' + _RESERVED_CHARS_RE.replace( '\\.', '' ) + ']';

		// Parent directories, delimited by '/' or ':'. Currently unused, but must
		// be matched to parse the rest of the track name.
		var _directoryRe = /((?:WC+[\/:])*)/.source.replace( 'WC', _wordChar );

		// Target node. May contain word characters (a-zA-Z0-9_) and '.' or '-'.
		var _nodeRe = /(WCOD+)?/.source.replace( 'WCOD', _wordCharOrDot );

		// Object on target node, and accessor. May not contain reserved
		// characters. Accessor may contain any character except closing bracket.
		var _objectRe = /(?:\.(WC+)(?:\[(.+)\])?)?/.source.replace( 'WC', _wordChar );

		// Property and accessor. May not contain reserved characters. Accessor may
		// contain any non-bracket characters.
		var _propertyRe = /\.(WC+)(?:\[(.+)\])?/.source.replace( 'WC', _wordChar );

		var _trackRe = new RegExp( ''
			+ '^'
			+ _directoryRe
			+ _nodeRe
			+ _objectRe
			+ _propertyRe
			+ '$'
		);

		var _supportedObjectNames = [ 'material', 'materials', 'bones' ];

		function Composite( targetGroup, path, optionalParsedPath ) {

			var parsedPath = optionalParsedPath || PropertyBinding.parseTrackName( path );

			this._targetGroup = targetGroup;
			this._bindings = targetGroup.subscribe_( path, parsedPath );

		}

		Object.assign( Composite.prototype, {

			getValue: function ( array, offset ) {

				this.bind(); // bind all binding

				var firstValidIndex = this._targetGroup.nCachedObjects_,
					binding = this._bindings[ firstValidIndex ];

				// and only call .getValue on the first
				if ( binding !== undefined ) { binding.getValue( array, offset ); }

			},

			setValue: function ( array, offset ) {

				var bindings = this._bindings;

				for ( var i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++ i ) {

					bindings[ i ].setValue( array, offset );

				}

			},

			bind: function () {

				var bindings = this._bindings;

				for ( var i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++ i ) {

					bindings[ i ].bind();

				}

			},

			unbind: function () {

				var bindings = this._bindings;

				for ( var i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++ i ) {

					bindings[ i ].unbind();

				}

			}

		} );


		function PropertyBinding( rootNode, path, parsedPath ) {

			this.path = path;
			this.parsedPath = parsedPath || PropertyBinding.parseTrackName( path );

			this.node = PropertyBinding.findNode( rootNode, this.parsedPath.nodeName ) || rootNode;

			this.rootNode = rootNode;

		}

		Object.assign( PropertyBinding, {

			Composite: Composite,

			create: function ( root, path, parsedPath ) {

				if ( ! ( root && root.isAnimationObjectGroup ) ) {

					return new PropertyBinding( root, path, parsedPath );

				} else {

					return new PropertyBinding.Composite( root, path, parsedPath );

				}

			},

			/**
			 * Replaces spaces with underscores and removes unsupported characters from
			 * node names, to ensure compatibility with parseTrackName().
			 *
			 * @param {string} name Node name to be sanitized.
			 * @return {string}
			 */
			sanitizeNodeName: function ( name ) {

				return name.replace( /\s/g, '_' ).replace( _reservedRe, '' );

			},

			parseTrackName: function ( trackName ) {

				var matches = _trackRe.exec( trackName );

				if ( ! matches ) {

					throw new Error( 'PropertyBinding: Cannot parse trackName: ' + trackName );

				}

				var results = {
					// directoryName: matches[ 1 ], // (tschw) currently unused
					nodeName: matches[ 2 ],
					objectName: matches[ 3 ],
					objectIndex: matches[ 4 ],
					propertyName: matches[ 5 ], // required
					propertyIndex: matches[ 6 ]
				};

				var lastDot = results.nodeName && results.nodeName.lastIndexOf( '.' );

				if ( lastDot !== undefined && lastDot !== - 1 ) {

					var objectName = results.nodeName.substring( lastDot + 1 );

					// Object names must be checked against an allowlist. Otherwise, there
					// is no way to parse 'foo.bar.baz': 'baz' must be a property, but
					// 'bar' could be the objectName, or part of a nodeName (which can
					// include '.' characters).
					if ( _supportedObjectNames.indexOf( objectName ) !== - 1 ) {

						results.nodeName = results.nodeName.substring( 0, lastDot );
						results.objectName = objectName;

					}

				}

				if ( results.propertyName === null || results.propertyName.length === 0 ) {

					throw new Error( 'PropertyBinding: can not parse propertyName from trackName: ' + trackName );

				}

				return results;

			},

			findNode: function ( root, nodeName ) {

				if ( ! nodeName || nodeName === "" || nodeName === "." || nodeName === - 1 || nodeName === root.name || nodeName === root.uuid ) {

					return root;

				}

				// search into skeleton bones.
				if ( root.skeleton ) {

					var bone = root.skeleton.getBoneByName( nodeName );

					if ( bone !== undefined ) {

						return bone;

					}

				}

				// search into node subtree.
				if ( root.children ) {

					var searchNodeSubtree = function ( children ) {

						for ( var i = 0; i < children.length; i ++ ) {

							var childNode = children[ i ];

							if ( childNode.name === nodeName || childNode.uuid === nodeName ) {

								return childNode;

							}

							var result = searchNodeSubtree( childNode.children );

							if ( result ) { return result; }

						}

						return null;

					};

					var subTreeNode = searchNodeSubtree( root.children );

					if ( subTreeNode ) {

						return subTreeNode;

					}

				}

				return null;

			}

		} );

		Object.assign( PropertyBinding.prototype, { // prototype, continued

			// these are used to "bind" a nonexistent property
			_getValue_unavailable: function () {},
			_setValue_unavailable: function () {},

			BindingType: {
				Direct: 0,
				EntireArray: 1,
				ArrayElement: 2,
				HasFromToArray: 3
			},

			Versioning: {
				None: 0,
				NeedsUpdate: 1,
				MatrixWorldNeedsUpdate: 2
			},

			GetterByBindingType: [

				function getValue_direct( buffer, offset ) {

					buffer[ offset ] = this.node[ this.propertyName ];

				},

				function getValue_array( buffer, offset ) {

					var source = this.resolvedProperty;

					for ( var i = 0, n = source.length; i !== n; ++ i ) {

						buffer[ offset ++ ] = source[ i ];

					}

				},

				function getValue_arrayElement( buffer, offset ) {

					buffer[ offset ] = this.resolvedProperty[ this.propertyIndex ];

				},

				function getValue_toArray( buffer, offset ) {

					this.resolvedProperty.toArray( buffer, offset );

				}

			],

			SetterByBindingTypeAndVersioning: [

				[
					// Direct

					function setValue_direct( buffer, offset ) {

						this.targetObject[ this.propertyName ] = buffer[ offset ];

					},

					function setValue_direct_setNeedsUpdate( buffer, offset ) {

						this.targetObject[ this.propertyName ] = buffer[ offset ];
						this.targetObject.needsUpdate = true;

					},

					function setValue_direct_setMatrixWorldNeedsUpdate( buffer, offset ) {

						this.targetObject[ this.propertyName ] = buffer[ offset ];
						this.targetObject.matrixWorldNeedsUpdate = true;

					}

				], [

					// EntireArray

					function setValue_array( buffer, offset ) {

						var dest = this.resolvedProperty;

						for ( var i = 0, n = dest.length; i !== n; ++ i ) {

							dest[ i ] = buffer[ offset ++ ];

						}

					},

					function setValue_array_setNeedsUpdate( buffer, offset ) {

						var dest = this.resolvedProperty;

						for ( var i = 0, n = dest.length; i !== n; ++ i ) {

							dest[ i ] = buffer[ offset ++ ];

						}

						this.targetObject.needsUpdate = true;

					},

					function setValue_array_setMatrixWorldNeedsUpdate( buffer, offset ) {

						var dest = this.resolvedProperty;

						for ( var i = 0, n = dest.length; i !== n; ++ i ) {

							dest[ i ] = buffer[ offset ++ ];

						}

						this.targetObject.matrixWorldNeedsUpdate = true;

					}

				], [

					// ArrayElement

					function setValue_arrayElement( buffer, offset ) {

						this.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];

					},

					function setValue_arrayElement_setNeedsUpdate( buffer, offset ) {

						this.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];
						this.targetObject.needsUpdate = true;

					},

					function setValue_arrayElement_setMatrixWorldNeedsUpdate( buffer, offset ) {

						this.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];
						this.targetObject.matrixWorldNeedsUpdate = true;

					}

				], [

					// HasToFromArray

					function setValue_fromArray( buffer, offset ) {

						this.resolvedProperty.fromArray( buffer, offset );

					},

					function setValue_fromArray_setNeedsUpdate( buffer, offset ) {

						this.resolvedProperty.fromArray( buffer, offset );
						this.targetObject.needsUpdate = true;

					},

					function setValue_fromArray_setMatrixWorldNeedsUpdate( buffer, offset ) {

						this.resolvedProperty.fromArray( buffer, offset );
						this.targetObject.matrixWorldNeedsUpdate = true;

					}

				]

			],

			getValue: function getValue_unbound( targetArray, offset ) {

				this.bind();
				this.getValue( targetArray, offset );

				// Note: This class uses a State pattern on a per-method basis:
				// 'bind' sets 'this.getValue' / 'setValue' and shadows the
				// prototype version of these methods with one that represents
				// the bound state. When the property is not found, the methods
				// become no-ops.

			},

			setValue: function getValue_unbound( sourceArray, offset ) {

				this.bind();
				this.setValue( sourceArray, offset );

			},

			// create getter / setter pair for a property in the scene graph
			bind: function () {

				var targetObject = this.node;
				var parsedPath = this.parsedPath;

				var objectName = parsedPath.objectName;
				var propertyName = parsedPath.propertyName;
				var propertyIndex = parsedPath.propertyIndex;

				if ( ! targetObject ) {

					targetObject = PropertyBinding.findNode( this.rootNode, parsedPath.nodeName ) || this.rootNode;

					this.node = targetObject;

				}

				// set fail state so we can just 'return' on error
				this.getValue = this._getValue_unavailable;
				this.setValue = this._setValue_unavailable;

				// ensure there is a value node
				if ( ! targetObject ) {

					console.error( 'THREE.PropertyBinding: Trying to update node for track: ' + this.path + ' but it wasn\'t found.' );
					return;

				}

				if ( objectName ) {

					var objectIndex = parsedPath.objectIndex;

					// special cases were we need to reach deeper into the hierarchy to get the face materials....
					switch ( objectName ) {

						case 'materials':

							if ( ! targetObject.material ) {

								console.error( 'THREE.PropertyBinding: Can not bind to material as node does not have a material.', this );
								return;

							}

							if ( ! targetObject.material.materials ) {

								console.error( 'THREE.PropertyBinding: Can not bind to material.materials as node.material does not have a materials array.', this );
								return;

							}

							targetObject = targetObject.material.materials;

							break;

						case 'bones':

							if ( ! targetObject.skeleton ) {

								console.error( 'THREE.PropertyBinding: Can not bind to bones as node does not have a skeleton.', this );
								return;

							}

							// potential future optimization: skip this if propertyIndex is already an integer
							// and convert the integer string to a true integer.

							targetObject = targetObject.skeleton.bones;

							// support resolving morphTarget names into indices.
							for ( var i = 0; i < targetObject.length; i ++ ) {

								if ( targetObject[ i ].name === objectIndex ) {

									objectIndex = i;
									break;

								}

							}

							break;

						default:

							if ( targetObject[ objectName ] === undefined ) {

								console.error( 'THREE.PropertyBinding: Can not bind to objectName of node undefined.', this );
								return;

							}

							targetObject = targetObject[ objectName ];

					}


					if ( objectIndex !== undefined ) {

						if ( targetObject[ objectIndex ] === undefined ) {

							console.error( 'THREE.PropertyBinding: Trying to bind to objectIndex of objectName, but is undefined.', this, targetObject );
							return;

						}

						targetObject = targetObject[ objectIndex ];

					}

				}

				// resolve property
				var nodeProperty = targetObject[ propertyName ];

				if ( nodeProperty === undefined ) {

					var nodeName = parsedPath.nodeName;

					console.error( 'THREE.PropertyBinding: Trying to update property for track: ' + nodeName +
						'.' + propertyName + ' but it wasn\'t found.', targetObject );
					return;

				}

				// determine versioning scheme
				var versioning = this.Versioning.None;

				this.targetObject = targetObject;

				if ( targetObject.needsUpdate !== undefined ) { // material

					versioning = this.Versioning.NeedsUpdate;

				} else if ( targetObject.matrixWorldNeedsUpdate !== undefined ) { // node transform

					versioning = this.Versioning.MatrixWorldNeedsUpdate;

				}

				// determine how the property gets bound
				var bindingType = this.BindingType.Direct;

				if ( propertyIndex !== undefined ) {

					// access a sub element of the property array (only primitives are supported right now)

					if ( propertyName === "morphTargetInfluences" ) {

						// potential optimization, skip this if propertyIndex is already an integer, and convert the integer string to a true integer.

						// support resolving morphTarget names into indices.
						if ( ! targetObject.geometry ) {

							console.error( 'THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.', this );
							return;

						}

						if ( targetObject.geometry.isBufferGeometry ) {

							if ( ! targetObject.geometry.morphAttributes ) {

								console.error( 'THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.morphAttributes.', this );
								return;

							}

							if ( targetObject.morphTargetDictionary[ propertyIndex ] !== undefined ) {

								propertyIndex = targetObject.morphTargetDictionary[ propertyIndex ];

							}


						} else {

							console.error( 'THREE.PropertyBinding: Can not bind to morphTargetInfluences on THREE.Geometry. Use THREE.BufferGeometry instead.', this );
							return;

						}

					}

					bindingType = this.BindingType.ArrayElement;

					this.resolvedProperty = nodeProperty;
					this.propertyIndex = propertyIndex;

				} else if ( nodeProperty.fromArray !== undefined && nodeProperty.toArray !== undefined ) {

					// must use copy for Object3D.Euler/Quaternion

					bindingType = this.BindingType.HasFromToArray;

					this.resolvedProperty = nodeProperty;

				} else if ( Array.isArray( nodeProperty ) ) {

					bindingType = this.BindingType.EntireArray;

					this.resolvedProperty = nodeProperty;

				} else {

					this.propertyName = propertyName;

				}

				// select getter / setter
				this.getValue = this.GetterByBindingType[ bindingType ];
				this.setValue = this.SetterByBindingTypeAndVersioning[ bindingType ][ versioning ];

			},

			unbind: function () {

				this.node = null;

				// back to the prototype version of getValue / setValue
				// note: avoiding to mutate the shape of 'this' via 'delete'
				this.getValue = this._getValue_unbound;
				this.setValue = this._setValue_unbound;

			}

		} );

		// DECLARE ALIAS AFTER assign prototype
		Object.assign( PropertyBinding.prototype, {

			// initial state of these methods that calls 'bind'
			_getValue_unbound: PropertyBinding.prototype.getValue,
			_setValue_unbound: PropertyBinding.prototype.setValue,

		} );

		/**
		 *
		 * A group of objects that receives a shared animation state.
		 *
		 * Usage:
		 *
		 *  - Add objects you would otherwise pass as 'root' to the
		 *    constructor or the .clipAction method of AnimationMixer.
		 *
		 *  - Instead pass this object as 'root'.
		 *
		 *  - You can also add and remove objects later when the mixer
		 *    is running.
		 *
		 * Note:
		 *
		 *    Objects of this class appear as one object to the mixer,
		 *    so cache control of the individual objects must be done
		 *    on the group.
		 *
		 * Limitation:
		 *
		 *  - The animated properties must be compatible among the
		 *    all objects in the group.
		 *
		 *  - A single property can either be controlled through a
		 *    target group or directly, but not both.
		 */

		function AnimationObjectGroup() {

			this.uuid = MathUtils.generateUUID();

			// cached objects followed by the active ones
			this._objects = Array.prototype.slice.call( arguments );

			this.nCachedObjects_ = 0; // threshold
			// note: read by PropertyBinding.Composite

			var indices = {};
			this._indicesByUUID = indices; // for bookkeeping

			for ( var i = 0, n = arguments.length; i !== n; ++ i ) {

				indices[ arguments[ i ].uuid ] = i;

			}

			this._paths = []; // inside: string
			this._parsedPaths = []; // inside: { we don't care, here }
			this._bindings = []; // inside: Array< PropertyBinding >
			this._bindingsIndicesByPath = {}; // inside: indices in these arrays

			var scope = this;

			this.stats = {

				objects: {
					get total() {

						return scope._objects.length;

					},
					get inUse() {

						return this.total - scope.nCachedObjects_;

					}
				},
				get bindingsPerObject() {

					return scope._bindings.length;

				}

			};

		}

		Object.assign( AnimationObjectGroup.prototype, {

			isAnimationObjectGroup: true,

			add: function () {

				var objects = this._objects,
					indicesByUUID = this._indicesByUUID,
					paths = this._paths,
					parsedPaths = this._parsedPaths,
					bindings = this._bindings,
					nBindings = bindings.length;

				var knownObject = undefined,
					nObjects = objects.length,
					nCachedObjects = this.nCachedObjects_;

				for ( var i = 0, n = arguments.length; i !== n; ++ i ) {

					var object = arguments[ i ],
						uuid = object.uuid;
					var index = indicesByUUID[ uuid ];

					if ( index === undefined ) {

						// unknown object -> add it to the ACTIVE region

						index = nObjects ++;
						indicesByUUID[ uuid ] = index;
						objects.push( object );

						// accounting is done, now do the same for all bindings

						for ( var j = 0, m = nBindings; j !== m; ++ j ) {

							bindings[ j ].push( new PropertyBinding( object, paths[ j ], parsedPaths[ j ] ) );

						}

					} else if ( index < nCachedObjects ) {

						knownObject = objects[ index ];

						// move existing object to the ACTIVE region

						var firstActiveIndex = -- nCachedObjects,
							lastCachedObject = objects[ firstActiveIndex ];

						indicesByUUID[ lastCachedObject.uuid ] = index;
						objects[ index ] = lastCachedObject;

						indicesByUUID[ uuid ] = firstActiveIndex;
						objects[ firstActiveIndex ] = object;

						// accounting is done, now do the same for all bindings

						for ( var j$1 = 0, m$1 = nBindings; j$1 !== m$1; ++ j$1 ) {

							var bindingsForPath = bindings[ j$1 ],
								lastCached = bindingsForPath[ firstActiveIndex ];

							var binding = bindingsForPath[ index ];

							bindingsForPath[ index ] = lastCached;

							if ( binding === undefined ) {

								// since we do not bother to create new bindings
								// for objects that are cached, the binding may
								// or may not exist

								binding = new PropertyBinding( object, paths[ j$1 ], parsedPaths[ j$1 ] );

							}

							bindingsForPath[ firstActiveIndex ] = binding;

						}

					} else if ( objects[ index ] !== knownObject ) {

						console.error( 'THREE.AnimationObjectGroup: Different objects with the same UUID ' +
							'detected. Clean the caches or recreate your infrastructure when reloading scenes.' );

					} // else the object is already where we want it to be

				} // for arguments

				this.nCachedObjects_ = nCachedObjects;

			},

			remove: function () {

				var objects = this._objects,
					indicesByUUID = this._indicesByUUID,
					bindings = this._bindings,
					nBindings = bindings.length;

				var nCachedObjects = this.nCachedObjects_;

				for ( var i = 0, n = arguments.length; i !== n; ++ i ) {

					var object = arguments[ i ],
						uuid = object.uuid,
						index = indicesByUUID[ uuid ];

					if ( index !== undefined && index >= nCachedObjects ) {

						// move existing object into the CACHED region

						var lastCachedIndex = nCachedObjects ++,
							firstActiveObject = objects[ lastCachedIndex ];

						indicesByUUID[ firstActiveObject.uuid ] = index;
						objects[ index ] = firstActiveObject;

						indicesByUUID[ uuid ] = lastCachedIndex;
						objects[ lastCachedIndex ] = object;

						// accounting is done, now do the same for all bindings

						for ( var j = 0, m = nBindings; j !== m; ++ j ) {

							var bindingsForPath = bindings[ j ],
								firstActive = bindingsForPath[ lastCachedIndex ],
								binding = bindingsForPath[ index ];

							bindingsForPath[ index ] = firstActive;
							bindingsForPath[ lastCachedIndex ] = binding;

						}

					}

				} // for arguments

				this.nCachedObjects_ = nCachedObjects;

			},

			// remove & forget
			uncache: function () {

				var objects = this._objects,
					indicesByUUID = this._indicesByUUID,
					bindings = this._bindings,
					nBindings = bindings.length;

				var nCachedObjects = this.nCachedObjects_,
					nObjects = objects.length;

				for ( var i = 0, n = arguments.length; i !== n; ++ i ) {

					var object = arguments[ i ],
						uuid = object.uuid,
						index = indicesByUUID[ uuid ];

					if ( index !== undefined ) {

						delete indicesByUUID[ uuid ];

						if ( index < nCachedObjects ) {

							// object is cached, shrink the CACHED region

							var firstActiveIndex = -- nCachedObjects,
								lastCachedObject = objects[ firstActiveIndex ],
								lastIndex = -- nObjects,
								lastObject = objects[ lastIndex ];

							// last cached object takes this object's place
							indicesByUUID[ lastCachedObject.uuid ] = index;
							objects[ index ] = lastCachedObject;

							// last object goes to the activated slot and pop
							indicesByUUID[ lastObject.uuid ] = firstActiveIndex;
							objects[ firstActiveIndex ] = lastObject;
							objects.pop();

							// accounting is done, now do the same for all bindings

							for ( var j = 0, m = nBindings; j !== m; ++ j ) {

								var bindingsForPath = bindings[ j ],
									lastCached = bindingsForPath[ firstActiveIndex ],
									last = bindingsForPath[ lastIndex ];

								bindingsForPath[ index ] = lastCached;
								bindingsForPath[ firstActiveIndex ] = last;
								bindingsForPath.pop();

							}

						} else {

							// object is active, just swap with the last and pop

							var lastIndex$1 = -- nObjects,
								lastObject$1 = objects[ lastIndex$1 ];

							indicesByUUID[ lastObject$1.uuid ] = index;
							objects[ index ] = lastObject$1;
							objects.pop();

							// accounting is done, now do the same for all bindings

							for ( var j$1 = 0, m$1 = nBindings; j$1 !== m$1; ++ j$1 ) {

								var bindingsForPath$1 = bindings[ j$1 ];

								bindingsForPath$1[ index ] = bindingsForPath$1[ lastIndex$1 ];
								bindingsForPath$1.pop();

							}

						} // cached or active

					} // if object is known

				} // for arguments

				this.nCachedObjects_ = nCachedObjects;

			},

			// Internal interface used by befriended PropertyBinding.Composite:

			subscribe_: function ( path, parsedPath ) {

				// returns an array of bindings for the given path that is changed
				// according to the contained objects in the group

				var indicesByPath = this._bindingsIndicesByPath;
				var index = indicesByPath[ path ];
				var bindings = this._bindings;

				if ( index !== undefined ) { return bindings[ index ]; }

				var paths = this._paths,
					parsedPaths = this._parsedPaths,
					objects = this._objects,
					nObjects = objects.length,
					nCachedObjects = this.nCachedObjects_,
					bindingsForPath = new Array( nObjects );

				index = bindings.length;

				indicesByPath[ path ] = index;

				paths.push( path );
				parsedPaths.push( parsedPath );
				bindings.push( bindingsForPath );

				for ( var i = nCachedObjects, n = objects.length; i !== n; ++ i ) {

					var object = objects[ i ];
					bindingsForPath[ i ] = new PropertyBinding( object, path, parsedPath );

				}

				return bindingsForPath;

			},

			unsubscribe_: function ( path ) {

				// tells the group to forget about a property path and no longer
				// update the array previously obtained with 'subscribe_'

				var indicesByPath = this._bindingsIndicesByPath,
					index = indicesByPath[ path ];

				if ( index !== undefined ) {

					var paths = this._paths,
						parsedPaths = this._parsedPaths,
						bindings = this._bindings,
						lastBindingsIndex = bindings.length - 1,
						lastBindings = bindings[ lastBindingsIndex ],
						lastBindingsPath = path[ lastBindingsIndex ];

					indicesByPath[ lastBindingsPath ] = index;

					bindings[ index ] = lastBindings;
					bindings.pop();

					parsedPaths[ index ] = parsedPaths[ lastBindingsIndex ];
					parsedPaths.pop();

					paths[ index ] = paths[ lastBindingsIndex ];
					paths.pop();

				}

			}

		} );

		var AnimationAction = function AnimationAction( mixer, clip, localRoot, blendMode ) {

			this._mixer = mixer;
			this._clip = clip;
			this._localRoot = localRoot || null;
			this.blendMode = blendMode || clip.blendMode;

			var tracks = clip.tracks,
				nTracks = tracks.length,
				interpolants = new Array( nTracks );

			var interpolantSettings = {
				endingStart: ZeroCurvatureEnding,
				endingEnd: ZeroCurvatureEnding
			};

			for ( var i = 0; i !== nTracks; ++ i ) {

				var interpolant = tracks[ i ].createInterpolant( null );
				interpolants[ i ] = interpolant;
				interpolant.settings = interpolantSettings;

			}

			this._interpolantSettings = interpolantSettings;

			this._interpolants = interpolants; // bound by the mixer

			// inside: PropertyMixer (managed by the mixer)
			this._propertyBindings = new Array( nTracks );

			this._cacheIndex = null; // for the memory manager
			this._byClipCacheIndex = null; // for the memory manager

			this._timeScaleInterpolant = null;
			this._weightInterpolant = null;

			this.loop = LoopRepeat;
			this._loopCount = - 1;

			// global mixer time when the action is to be started
			// it's set back to 'null' upon start of the action
			this._startTime = null;

			// scaled local time of the action
			// gets clamped or wrapped to 0..clip.duration according to loop
			this.time = 0;

			this.timeScale = 1;
			this._effectiveTimeScale = 1;

			this.weight = 1;
			this._effectiveWeight = 1;

			this.repetitions = Infinity; // no. of repetitions when looping

			this.paused = false; // true -> zero effective time scale
			this.enabled = true; // false -> zero effective weight

			this.clampWhenFinished = false;// keep feeding the last frame?

			this.zeroSlopeAtStart = true;// for smooth interpolation w/o separate
			this.zeroSlopeAtEnd = true;// clips for start, loop and end

		};

		// State & Scheduling

		AnimationAction.prototype.play = function play () {

			this._mixer._activateAction( this );

			return this;

		};

		AnimationAction.prototype.stop = function stop () {

			this._mixer._deactivateAction( this );

			return this.reset();

		};

		AnimationAction.prototype.reset = function reset () {

			this.paused = false;
			this.enabled = true;

			this.time = 0; // restart clip
			this._loopCount = - 1;// forget previous loops
			this._startTime = null;// forget scheduling

			return this.stopFading().stopWarping();

		};

		AnimationAction.prototype.isRunning = function isRunning () {

			return this.enabled && ! this.paused && this.timeScale !== 0 &&
				this._startTime === null && this._mixer._isActiveAction( this );

		};

		// return true when play has been called
		AnimationAction.prototype.isScheduled = function isScheduled () {

			return this._mixer._isActiveAction( this );

		};

		AnimationAction.prototype.startAt = function startAt ( time ) {

			this._startTime = time;

			return this;

		};

		AnimationAction.prototype.setLoop = function setLoop ( mode, repetitions ) {

			this.loop = mode;
			this.repetitions = repetitions;

			return this;

		};

		// Weight

		// set the weight stopping any scheduled fading
		// although .enabled = false yields an effective weight of zero, this
		// method does *not* change .enabled, because it would be confusing
		AnimationAction.prototype.setEffectiveWeight = function setEffectiveWeight ( weight ) {

			this.weight = weight;

			// note: same logic as when updated at runtime
			this._effectiveWeight = this.enabled ? weight : 0;

			return this.stopFading();

		};

		// return the weight considering fading and .enabled
		AnimationAction.prototype.getEffectiveWeight = function getEffectiveWeight () {

			return this._effectiveWeight;

		};

		AnimationAction.prototype.fadeIn = function fadeIn ( duration ) {

			return this._scheduleFading( duration, 0, 1 );

		};

		AnimationAction.prototype.fadeOut = function fadeOut ( duration ) {

			return this._scheduleFading( duration, 1, 0 );

		};

		AnimationAction.prototype.crossFadeFrom = function crossFadeFrom ( fadeOutAction, duration, warp ) {

			fadeOutAction.fadeOut( duration );
			this.fadeIn( duration );

			if ( warp ) {

				var fadeInDuration = this._clip.duration,
					fadeOutDuration = fadeOutAction._clip.duration,

					startEndRatio = fadeOutDuration / fadeInDuration,
					endStartRatio = fadeInDuration / fadeOutDuration;

				fadeOutAction.warp( 1.0, startEndRatio, duration );
				this.warp( endStartRatio, 1.0, duration );

			}

			return this;

		};

		AnimationAction.prototype.crossFadeTo = function crossFadeTo ( fadeInAction, duration, warp ) {

			return fadeInAction.crossFadeFrom( this, duration, warp );

		};

		AnimationAction.prototype.stopFading = function stopFading () {

			var weightInterpolant = this._weightInterpolant;

			if ( weightInterpolant !== null ) {

				this._weightInterpolant = null;
				this._mixer._takeBackControlInterpolant( weightInterpolant );

			}

			return this;

		};

		// Time Scale Control

		// set the time scale stopping any scheduled warping
		// although .paused = true yields an effective time scale of zero, this
		// method does *not* change .paused, because it would be confusing
		AnimationAction.prototype.setEffectiveTimeScale = function setEffectiveTimeScale ( timeScale ) {

			this.timeScale = timeScale;
			this._effectiveTimeScale = this.paused ? 0 : timeScale;

			return this.stopWarping();

		};

		// return the time scale considering warping and .paused
		AnimationAction.prototype.getEffectiveTimeScale = function getEffectiveTimeScale () {

			return this._effectiveTimeScale;

		};

		AnimationAction.prototype.setDuration = function setDuration ( duration ) {

			this.timeScale = this._clip.duration / duration;

			return this.stopWarping();

		};

		AnimationAction.prototype.syncWith = function syncWith ( action ) {

			this.time = action.time;
			this.timeScale = action.timeScale;

			return this.stopWarping();

		};

		AnimationAction.prototype.halt = function halt ( duration ) {

			return this.warp( this._effectiveTimeScale, 0, duration );

		};

		AnimationAction.prototype.warp = function warp ( startTimeScale, endTimeScale, duration ) {

			var mixer = this._mixer,
				now = mixer.time,
				timeScale = this.timeScale;

			var interpolant = this._timeScaleInterpolant;

			if ( interpolant === null ) {

				interpolant = mixer._lendControlInterpolant();
				this._timeScaleInterpolant = interpolant;

			}

			var times = interpolant.parameterPositions,
				values = interpolant.sampleValues;

			times[ 0 ] = now;
			times[ 1 ] = now + duration;

			values[ 0 ] = startTimeScale / timeScale;
			values[ 1 ] = endTimeScale / timeScale;

			return this;

		};

		AnimationAction.prototype.stopWarping = function stopWarping () {

			var timeScaleInterpolant = this._timeScaleInterpolant;

			if ( timeScaleInterpolant !== null ) {

				this._timeScaleInterpolant = null;
				this._mixer._takeBackControlInterpolant( timeScaleInterpolant );

			}

			return this;

		};

		// Object Accessors

		AnimationAction.prototype.getMixer = function getMixer () {

			return this._mixer;

		};

		AnimationAction.prototype.getClip = function getClip () {

			return this._clip;

		};

		AnimationAction.prototype.getRoot = function getRoot () {

			return this._localRoot || this._mixer._root;

		};

		// Interna

		AnimationAction.prototype._update = function _update ( time, deltaTime, timeDirection, accuIndex ) {

			// called by the mixer

			if ( ! this.enabled ) {

				// call ._updateWeight() to update ._effectiveWeight

				this._updateWeight( time );
				return;

			}

			var startTime = this._startTime;

			if ( startTime !== null ) {

				// check for scheduled start of action

				var timeRunning = ( time - startTime ) * timeDirection;
				if ( timeRunning < 0 || timeDirection === 0 ) {

					return; // yet to come / don't decide when delta = 0

				}

				// start

				this._startTime = null; // unschedule
				deltaTime = timeDirection * timeRunning;

			}

			// apply time scale and advance time

			deltaTime *= this._updateTimeScale( time );
			var clipTime = this._updateTime( deltaTime );

			// note: _updateTime may disable the action resulting in
			// an effective weight of 0

			var weight = this._updateWeight( time );

			if ( weight > 0 ) {

				var interpolants = this._interpolants;
				var propertyMixers = this._propertyBindings;

				switch ( this.blendMode ) {

					case AdditiveAnimationBlendMode:

						for ( var j = 0, m = interpolants.length; j !== m; ++ j ) {

							interpolants[ j ].evaluate( clipTime );
							propertyMixers[ j ].accumulateAdditive( weight );

						}

						break;

					case NormalAnimationBlendMode:
					default:

						for ( var j$1 = 0, m$1 = interpolants.length; j$1 !== m$1; ++ j$1 ) {

							interpolants[ j$1 ].evaluate( clipTime );
							propertyMixers[ j$1 ].accumulate( accuIndex, weight );

						}

				}

			}

		};

		AnimationAction.prototype._updateWeight = function _updateWeight ( time ) {

			var weight = 0;

			if ( this.enabled ) {

				weight = this.weight;
				var interpolant = this._weightInterpolant;

				if ( interpolant !== null ) {

					var interpolantValue = interpolant.evaluate( time )[ 0 ];

					weight *= interpolantValue;

					if ( time > interpolant.parameterPositions[ 1 ] ) {

						this.stopFading();

						if ( interpolantValue === 0 ) {

							// faded out, disable
							this.enabled = false;

						}

					}

				}

			}

			this._effectiveWeight = weight;
			return weight;

		};

		AnimationAction.prototype._updateTimeScale = function _updateTimeScale ( time ) {

			var timeScale = 0;

			if ( ! this.paused ) {

				timeScale = this.timeScale;

				var interpolant = this._timeScaleInterpolant;

				if ( interpolant !== null ) {

					var interpolantValue = interpolant.evaluate( time )[ 0 ];

					timeScale *= interpolantValue;

					if ( time > interpolant.parameterPositions[ 1 ] ) {

						this.stopWarping();

						if ( timeScale === 0 ) {

							// motion has halted, pause
							this.paused = true;

						} else {

							// warp done - apply final time scale
							this.timeScale = timeScale;

						}

					}

				}

			}

			this._effectiveTimeScale = timeScale;
			return timeScale;

		};

		AnimationAction.prototype._updateTime = function _updateTime ( deltaTime ) {

			var duration = this._clip.duration;
			var loop = this.loop;

			var time = this.time + deltaTime;
			var loopCount = this._loopCount;

			var pingPong = ( loop === LoopPingPong );

			if ( deltaTime === 0 ) {

				if ( loopCount === - 1 ) { return time; }

				return ( pingPong && ( loopCount & 1 ) === 1 ) ? duration - time : time;

			}

			if ( loop === LoopOnce ) {

				if ( loopCount === - 1 ) {

					// just started

					this._loopCount = 0;
					this._setEndings( true, true, false );

				}

				handle_stop: {

					if ( time >= duration ) {

						time = duration;

					} else if ( time < 0 ) {

						time = 0;

					} else {

						this.time = time;

						break handle_stop;

					}

					if ( this.clampWhenFinished ) { this.paused = true; }
					else { this.enabled = false; }

					this.time = time;

					this._mixer.dispatchEvent( {
						type: 'finished', action: this,
						direction: deltaTime < 0 ? - 1 : 1
					} );

				}

			} else { // repetitive Repeat or PingPong

				if ( loopCount === - 1 ) {

					// just started

					if ( deltaTime >= 0 ) {

						loopCount = 0;

						this._setEndings( true, this.repetitions === 0, pingPong );

					} else {

						// when looping in reverse direction, the initial
						// transition through zero counts as a repetition,
						// so leave loopCount at -1

						this._setEndings( this.repetitions === 0, true, pingPong );

					}

				}

				if ( time >= duration || time < 0 ) {

					// wrap around

					var loopDelta = Math.floor( time / duration ); // signed
					time -= duration * loopDelta;

					loopCount += Math.abs( loopDelta );

					var pending = this.repetitions - loopCount;

					if ( pending <= 0 ) {

						// have to stop (switch state, clamp time, fire event)

						if ( this.clampWhenFinished ) { this.paused = true; }
						else { this.enabled = false; }

						time = deltaTime > 0 ? duration : 0;

						this.time = time;

						this._mixer.dispatchEvent( {
							type: 'finished', action: this,
							direction: deltaTime > 0 ? 1 : - 1
						} );

					} else {

						// keep running

						if ( pending === 1 ) {

							// entering the last round

							var atStart = deltaTime < 0;
							this._setEndings( atStart, ! atStart, pingPong );

						} else {

							this._setEndings( false, false, pingPong );

						}

						this._loopCount = loopCount;

						this.time = time;

						this._mixer.dispatchEvent( {
							type: 'loop', action: this, loopDelta: loopDelta
						} );

					}

				} else {

					this.time = time;

				}

				if ( pingPong && ( loopCount & 1 ) === 1 ) {

					// invert time for the "pong round"

					return duration - time;

				}

			}

			return time;

		};

		AnimationAction.prototype._setEndings = function _setEndings ( atStart, atEnd, pingPong ) {

			var settings = this._interpolantSettings;

			if ( pingPong ) {

				settings.endingStart = ZeroSlopeEnding;
				settings.endingEnd = ZeroSlopeEnding;

			} else {

				// assuming for LoopOnce atStart == atEnd == true

				if ( atStart ) {

					settings.endingStart = this.zeroSlopeAtStart ? ZeroSlopeEnding : ZeroCurvatureEnding;

				} else {

					settings.endingStart = WrapAroundEnding;

				}

				if ( atEnd ) {

					settings.endingEnd = this.zeroSlopeAtEnd ? ZeroSlopeEnding : ZeroCurvatureEnding;

				} else {

					settings.endingEnd 	 = WrapAroundEnding;

				}

			}

		};

		AnimationAction.prototype._scheduleFading = function _scheduleFading ( duration, weightNow, weightThen ) {

			var mixer = this._mixer, now = mixer.time;
			var interpolant = this._weightInterpolant;

			if ( interpolant === null ) {

				interpolant = mixer._lendControlInterpolant();
				this._weightInterpolant = interpolant;

			}

			var times = interpolant.parameterPositions,
				values = interpolant.sampleValues;

			times[ 0 ] = now;
			values[ 0 ] = weightNow;
			times[ 1 ] = now + duration;
			values[ 1 ] = weightThen;

			return this;

		};

		function AnimationMixer( root ) {

			this._root = root;
			this._initMemoryManager();
			this._accuIndex = 0;

			this.time = 0;

			this.timeScale = 1.0;

		}

		AnimationMixer.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {

			constructor: AnimationMixer,

			_bindAction: function ( action, prototypeAction ) {

				var root = action._localRoot || this._root,
					tracks = action._clip.tracks,
					nTracks = tracks.length,
					bindings = action._propertyBindings,
					interpolants = action._interpolants,
					rootUuid = root.uuid,
					bindingsByRoot = this._bindingsByRootAndName;

				var bindingsByName = bindingsByRoot[ rootUuid ];

				if ( bindingsByName === undefined ) {

					bindingsByName = {};
					bindingsByRoot[ rootUuid ] = bindingsByName;

				}

				for ( var i = 0; i !== nTracks; ++ i ) {

					var track = tracks[ i ],
						trackName = track.name;

					var binding = bindingsByName[ trackName ];

					if ( binding !== undefined ) {

						bindings[ i ] = binding;

					} else {

						binding = bindings[ i ];

						if ( binding !== undefined ) {

							// existing binding, make sure the cache knows

							if ( binding._cacheIndex === null ) {

								++ binding.referenceCount;
								this._addInactiveBinding( binding, rootUuid, trackName );

							}

							continue;

						}

						var path = prototypeAction && prototypeAction.
							_propertyBindings[ i ].binding.parsedPath;

						binding = new PropertyMixer(
							PropertyBinding.create( root, trackName, path ),
							track.ValueTypeName, track.getValueSize() );

						++ binding.referenceCount;
						this._addInactiveBinding( binding, rootUuid, trackName );

						bindings[ i ] = binding;

					}

					interpolants[ i ].resultBuffer = binding.buffer;

				}

			},

			_activateAction: function ( action ) {

				if ( ! this._isActiveAction( action ) ) {

					if ( action._cacheIndex === null ) {

						// this action has been forgotten by the cache, but the user
						// appears to be still using it -> rebind

						var rootUuid = ( action._localRoot || this._root ).uuid,
							clipUuid = action._clip.uuid,
							actionsForClip = this._actionsByClip[ clipUuid ];

						this._bindAction( action,
							actionsForClip && actionsForClip.knownActions[ 0 ] );

						this._addInactiveAction( action, clipUuid, rootUuid );

					}

					var bindings = action._propertyBindings;

					// increment reference counts / sort out state
					for ( var i = 0, n = bindings.length; i !== n; ++ i ) {

						var binding = bindings[ i ];

						if ( binding.useCount ++ === 0 ) {

							this._lendBinding( binding );
							binding.saveOriginalState();

						}

					}

					this._lendAction( action );

				}

			},

			_deactivateAction: function ( action ) {

				if ( this._isActiveAction( action ) ) {

					var bindings = action._propertyBindings;

					// decrement reference counts / sort out state
					for ( var i = 0, n = bindings.length; i !== n; ++ i ) {

						var binding = bindings[ i ];

						if ( -- binding.useCount === 0 ) {

							binding.restoreOriginalState();
							this._takeBackBinding( binding );

						}

					}

					this._takeBackAction( action );

				}

			},

			// Memory manager

			_initMemoryManager: function () {

				this._actions = []; // 'nActiveActions' followed by inactive ones
				this._nActiveActions = 0;

				this._actionsByClip = {};
				// inside:
				// {
				// 	knownActions: Array< AnimationAction > - used as prototypes
				// 	actionByRoot: AnimationAction - lookup
				// }


				this._bindings = []; // 'nActiveBindings' followed by inactive ones
				this._nActiveBindings = 0;

				this._bindingsByRootAndName = {}; // inside: Map< name, PropertyMixer >


				this._controlInterpolants = []; // same game as above
				this._nActiveControlInterpolants = 0;

				var scope = this;

				this.stats = {

					actions: {
						get total() {

							return scope._actions.length;

						},
						get inUse() {

							return scope._nActiveActions;

						}
					},
					bindings: {
						get total() {

							return scope._bindings.length;

						},
						get inUse() {

							return scope._nActiveBindings;

						}
					},
					controlInterpolants: {
						get total() {

							return scope._controlInterpolants.length;

						},
						get inUse() {

							return scope._nActiveControlInterpolants;

						}
					}

				};

			},

			// Memory management for AnimationAction objects

			_isActiveAction: function ( action ) {

				var index = action._cacheIndex;
				return index !== null && index < this._nActiveActions;

			},

			_addInactiveAction: function ( action, clipUuid, rootUuid ) {

				var actions = this._actions,
					actionsByClip = this._actionsByClip;

				var actionsForClip = actionsByClip[ clipUuid ];

				if ( actionsForClip === undefined ) {

					actionsForClip = {

						knownActions: [ action ],
						actionByRoot: {}

					};

					action._byClipCacheIndex = 0;

					actionsByClip[ clipUuid ] = actionsForClip;

				} else {

					var knownActions = actionsForClip.knownActions;

					action._byClipCacheIndex = knownActions.length;
					knownActions.push( action );

				}

				action._cacheIndex = actions.length;
				actions.push( action );

				actionsForClip.actionByRoot[ rootUuid ] = action;

			},

			_removeInactiveAction: function ( action ) {

				var actions = this._actions,
					lastInactiveAction = actions[ actions.length - 1 ],
					cacheIndex = action._cacheIndex;

				lastInactiveAction._cacheIndex = cacheIndex;
				actions[ cacheIndex ] = lastInactiveAction;
				actions.pop();

				action._cacheIndex = null;


				var clipUuid = action._clip.uuid,
					actionsByClip = this._actionsByClip,
					actionsForClip = actionsByClip[ clipUuid ],
					knownActionsForClip = actionsForClip.knownActions,

					lastKnownAction =
						knownActionsForClip[ knownActionsForClip.length - 1 ],

					byClipCacheIndex = action._byClipCacheIndex;

				lastKnownAction._byClipCacheIndex = byClipCacheIndex;
				knownActionsForClip[ byClipCacheIndex ] = lastKnownAction;
				knownActionsForClip.pop();

				action._byClipCacheIndex = null;


				var actionByRoot = actionsForClip.actionByRoot,
					rootUuid = ( action._localRoot || this._root ).uuid;

				delete actionByRoot[ rootUuid ];

				if ( knownActionsForClip.length === 0 ) {

					delete actionsByClip[ clipUuid ];

				}

				this._removeInactiveBindingsForAction( action );

			},

			_removeInactiveBindingsForAction: function ( action ) {

				var bindings = action._propertyBindings;

				for ( var i = 0, n = bindings.length; i !== n; ++ i ) {

					var binding = bindings[ i ];

					if ( -- binding.referenceCount === 0 ) {

						this._removeInactiveBinding( binding );

					}

				}

			},

			_lendAction: function ( action ) {

				// [ active actions |  inactive actions  ]
				// [  active actions >| inactive actions ]
				//                 s        a
				//                  <-swap->
				//                 a        s

				var actions = this._actions,
					prevIndex = action._cacheIndex,

					lastActiveIndex = this._nActiveActions ++,

					firstInactiveAction = actions[ lastActiveIndex ];

				action._cacheIndex = lastActiveIndex;
				actions[ lastActiveIndex ] = action;

				firstInactiveAction._cacheIndex = prevIndex;
				actions[ prevIndex ] = firstInactiveAction;

			},

			_takeBackAction: function ( action ) {

				// [  active actions  | inactive actions ]
				// [ active actions |< inactive actions  ]
				//        a        s
				//         <-swap->
				//        s        a

				var actions = this._actions,
					prevIndex = action._cacheIndex,

					firstInactiveIndex = -- this._nActiveActions,

					lastActiveAction = actions[ firstInactiveIndex ];

				action._cacheIndex = firstInactiveIndex;
				actions[ firstInactiveIndex ] = action;

				lastActiveAction._cacheIndex = prevIndex;
				actions[ prevIndex ] = lastActiveAction;

			},

			// Memory management for PropertyMixer objects

			_addInactiveBinding: function ( binding, rootUuid, trackName ) {

				var bindingsByRoot = this._bindingsByRootAndName,
					bindings = this._bindings;

				var bindingByName = bindingsByRoot[ rootUuid ];

				if ( bindingByName === undefined ) {

					bindingByName = {};
					bindingsByRoot[ rootUuid ] = bindingByName;

				}

				bindingByName[ trackName ] = binding;

				binding._cacheIndex = bindings.length;
				bindings.push( binding );

			},

			_removeInactiveBinding: function ( binding ) {

				var bindings = this._bindings,
					propBinding = binding.binding,
					rootUuid = propBinding.rootNode.uuid,
					trackName = propBinding.path,
					bindingsByRoot = this._bindingsByRootAndName,
					bindingByName = bindingsByRoot[ rootUuid ],

					lastInactiveBinding = bindings[ bindings.length - 1 ],
					cacheIndex = binding._cacheIndex;

				lastInactiveBinding._cacheIndex = cacheIndex;
				bindings[ cacheIndex ] = lastInactiveBinding;
				bindings.pop();

				delete bindingByName[ trackName ];

				if ( Object.keys( bindingByName ).length === 0 ) {

					delete bindingsByRoot[ rootUuid ];

				}

			},

			_lendBinding: function ( binding ) {

				var bindings = this._bindings,
					prevIndex = binding._cacheIndex,

					lastActiveIndex = this._nActiveBindings ++,

					firstInactiveBinding = bindings[ lastActiveIndex ];

				binding._cacheIndex = lastActiveIndex;
				bindings[ lastActiveIndex ] = binding;

				firstInactiveBinding._cacheIndex = prevIndex;
				bindings[ prevIndex ] = firstInactiveBinding;

			},

			_takeBackBinding: function ( binding ) {

				var bindings = this._bindings,
					prevIndex = binding._cacheIndex,

					firstInactiveIndex = -- this._nActiveBindings,

					lastActiveBinding = bindings[ firstInactiveIndex ];

				binding._cacheIndex = firstInactiveIndex;
				bindings[ firstInactiveIndex ] = binding;

				lastActiveBinding._cacheIndex = prevIndex;
				bindings[ prevIndex ] = lastActiveBinding;

			},


			// Memory management of Interpolants for weight and time scale

			_lendControlInterpolant: function () {

				var interpolants = this._controlInterpolants,
					lastActiveIndex = this._nActiveControlInterpolants ++;

				var interpolant = interpolants[ lastActiveIndex ];

				if ( interpolant === undefined ) {

					interpolant = new LinearInterpolant(
						new Float32Array( 2 ), new Float32Array( 2 ),
						1, this._controlInterpolantsResultBuffer );

					interpolant.__cacheIndex = lastActiveIndex;
					interpolants[ lastActiveIndex ] = interpolant;

				}

				return interpolant;

			},

			_takeBackControlInterpolant: function ( interpolant ) {

				var interpolants = this._controlInterpolants,
					prevIndex = interpolant.__cacheIndex,

					firstInactiveIndex = -- this._nActiveControlInterpolants,

					lastActiveInterpolant = interpolants[ firstInactiveIndex ];

				interpolant.__cacheIndex = firstInactiveIndex;
				interpolants[ firstInactiveIndex ] = interpolant;

				lastActiveInterpolant.__cacheIndex = prevIndex;
				interpolants[ prevIndex ] = lastActiveInterpolant;

			},

			_controlInterpolantsResultBuffer: new Float32Array( 1 ),

			// return an action for a clip optionally using a custom root target
			// object (this method allocates a lot of dynamic memory in case a
			// previously unknown clip/root combination is specified)
			clipAction: function ( clip, optionalRoot, blendMode ) {

				var root = optionalRoot || this._root,
					rootUuid = root.uuid;

				var clipObject = typeof clip === 'string' ? AnimationClip.findByName( root, clip ) : clip;

				var clipUuid = clipObject !== null ? clipObject.uuid : clip;

				var actionsForClip = this._actionsByClip[ clipUuid ];
				var prototypeAction = null;

				if ( blendMode === undefined ) {

					if ( clipObject !== null ) {

						blendMode = clipObject.blendMode;

					} else {

						blendMode = NormalAnimationBlendMode;

					}

				}

				if ( actionsForClip !== undefined ) {

					var existingAction = actionsForClip.actionByRoot[ rootUuid ];

					if ( existingAction !== undefined && existingAction.blendMode === blendMode ) {

						return existingAction;

					}

					// we know the clip, so we don't have to parse all
					// the bindings again but can just copy
					prototypeAction = actionsForClip.knownActions[ 0 ];

					// also, take the clip from the prototype action
					if ( clipObject === null )
						{ clipObject = prototypeAction._clip; }

				}

				// clip must be known when specified via string
				if ( clipObject === null ) { return null; }

				// allocate all resources required to run it
				var newAction = new AnimationAction( this, clipObject, optionalRoot, blendMode );

				this._bindAction( newAction, prototypeAction );

				// and make the action known to the memory manager
				this._addInactiveAction( newAction, clipUuid, rootUuid );

				return newAction;

			},

			// get an existing action
			existingAction: function ( clip, optionalRoot ) {

				var root = optionalRoot || this._root,
					rootUuid = root.uuid,

					clipObject = typeof clip === 'string' ?
						AnimationClip.findByName( root, clip ) : clip,

					clipUuid = clipObject ? clipObject.uuid : clip,

					actionsForClip = this._actionsByClip[ clipUuid ];

				if ( actionsForClip !== undefined ) {

					return actionsForClip.actionByRoot[ rootUuid ] || null;

				}

				return null;

			},

			// deactivates all previously scheduled actions
			stopAllAction: function () {

				var actions = this._actions,
					nActions = this._nActiveActions;

				for ( var i = nActions - 1; i >= 0; -- i ) {

					actions[ i ].stop();

				}

				return this;

			},

			// advance the time and update apply the animation
			update: function ( deltaTime ) {

				deltaTime *= this.timeScale;

				var actions = this._actions,
					nActions = this._nActiveActions,

					time = this.time += deltaTime,
					timeDirection = Math.sign( deltaTime ),

					accuIndex = this._accuIndex ^= 1;

				// run active actions

				for ( var i = 0; i !== nActions; ++ i ) {

					var action = actions[ i ];

					action._update( time, deltaTime, timeDirection, accuIndex );

				}

				// update scene graph

				var bindings = this._bindings,
					nBindings = this._nActiveBindings;

				for ( var i$1 = 0; i$1 !== nBindings; ++ i$1 ) {

					bindings[ i$1 ].apply( accuIndex );

				}

				return this;

			},

			// Allows you to seek to a specific time in an animation.
			setTime: function ( timeInSeconds ) {

				this.time = 0; // Zero out time attribute for AnimationMixer object;
				for ( var i = 0; i < this._actions.length; i ++ ) {

					this._actions[ i ].time = 0; // Zero out time attribute for all associated AnimationAction objects.

				}

				return this.update( timeInSeconds ); // Update used to set exact time. Returns "this" AnimationMixer object.

			},

			// return this mixer's root target object
			getRoot: function () {

				return this._root;

			},

			// free all resources specific to a particular clip
			uncacheClip: function ( clip ) {

				var actions = this._actions,
					clipUuid = clip.uuid,
					actionsByClip = this._actionsByClip,
					actionsForClip = actionsByClip[ clipUuid ];

				if ( actionsForClip !== undefined ) {

					// note: just calling _removeInactiveAction would mess up the
					// iteration state and also require updating the state we can
					// just throw away

					var actionsToRemove = actionsForClip.knownActions;

					for ( var i = 0, n = actionsToRemove.length; i !== n; ++ i ) {

						var action = actionsToRemove[ i ];

						this._deactivateAction( action );

						var cacheIndex = action._cacheIndex,
							lastInactiveAction = actions[ actions.length - 1 ];

						action._cacheIndex = null;
						action._byClipCacheIndex = null;

						lastInactiveAction._cacheIndex = cacheIndex;
						actions[ cacheIndex ] = lastInactiveAction;
						actions.pop();

						this._removeInactiveBindingsForAction( action );

					}

					delete actionsByClip[ clipUuid ];

				}

			},

			// free all resources specific to a particular root target object
			uncacheRoot: function ( root ) {

				var rootUuid = root.uuid,
					actionsByClip = this._actionsByClip;

				for ( var clipUuid in actionsByClip ) {

					var actionByRoot = actionsByClip[ clipUuid ].actionByRoot,
						action = actionByRoot[ rootUuid ];

					if ( action !== undefined ) {

						this._deactivateAction( action );
						this._removeInactiveAction( action );

					}

				}

				var bindingsByRoot = this._bindingsByRootAndName,
					bindingByName = bindingsByRoot[ rootUuid ];

				if ( bindingByName !== undefined ) {

					for ( var trackName in bindingByName ) {

						var binding = bindingByName[ trackName ];
						binding.restoreOriginalState();
						this._removeInactiveBinding( binding );

					}

				}

			},

			// remove a targeted clip from the cache
			uncacheAction: function ( clip, optionalRoot ) {

				var action = this.existingAction( clip, optionalRoot );

				if ( action !== null ) {

					this._deactivateAction( action );
					this._removeInactiveAction( action );

				}

			}

		} );

		var Uniform = function Uniform( value ) {

			if ( typeof value === 'string' ) {

				console.warn( 'THREE.Uniform: Type parameter is no longer needed.' );
				value = arguments[ 1 ];

			}

			this.value = value;

		};

		Uniform.prototype.clone = function clone () {

			return new Uniform( this.value.clone === undefined ? this.value : this.value.clone() );

		};

		function InstancedInterleavedBuffer( array, stride, meshPerAttribute ) {

			InterleavedBuffer.call( this, array, stride );

			this.meshPerAttribute = meshPerAttribute || 1;

		}

		InstancedInterleavedBuffer.prototype = Object.assign( Object.create( InterleavedBuffer.prototype ), {

			constructor: InstancedInterleavedBuffer,

			isInstancedInterleavedBuffer: true,

			copy: function ( source ) {

				InterleavedBuffer.prototype.copy.call( this, source );

				this.meshPerAttribute = source.meshPerAttribute;

				return this;

			},

			clone: function ( data ) {

				var ib = InterleavedBuffer.prototype.clone.call( this, data );

				ib.meshPerAttribute = this.meshPerAttribute;

				return ib;

			},

			toJSON: function ( data ) {

				var json = InterleavedBuffer.prototype.toJSON.call( this, data );

				json.isInstancedInterleavedBuffer = true;
				json.meshPerAttribute = this.meshPerAttribute;

				return json;

			}

		} );

		/**
		 * @author raub / https://github.com/raub
		 */

		/**
		 * Element size is one of:
		 * 5126: 4
		 * 5123: 2
		 * 5122: 2
		 * 5125: 4
		 * 5124: 4
		 * 5120: 1
		 * 5121: 1
		 */
		function GLBufferAttribute( buffer, type, itemSize, elementSize, count ) {

			this.buffer = buffer;
			this.type = type;
			this.itemSize = itemSize;
			this.elementSize = elementSize;
			this.count = count;

			this.version = 0;

		}

		Object.defineProperty( GLBufferAttribute.prototype, 'needsUpdate', {

			set: function ( value ) {

				if ( value === true ) { this.version ++; }

			}

		} );

		Object.assign( GLBufferAttribute.prototype, {

			isGLBufferAttribute: true,

			setBuffer: function ( buffer ) {

				this.buffer = buffer;

				return this;

			},

			setType: function ( type, elementSize ) {

				this.type = type;
				this.elementSize = elementSize;

				return this;

			},

			setItemSize: function ( itemSize ) {

				this.itemSize = itemSize;

				return this;

			},

			setCount: function ( count ) {

				this.count = count;

				return this;

			},

		} );

		function Raycaster( origin, direction, near, far ) {

			this.ray = new Ray( origin, direction );
			// direction is assumed to be normalized (for accurate distance calculations)

			this.near = near || 0;
			this.far = far || Infinity;
			this.camera = null;
			this.layers = new Layers();

			this.params = {
				Mesh: {},
				Line: { threshold: 1 },
				LOD: {},
				Points: { threshold: 1 },
				Sprite: {}
			};

			Object.defineProperties( this.params, {
				PointCloud: {
					get: function () {

						console.warn( 'THREE.Raycaster: params.PointCloud has been renamed to params.Points.' );
						return this.Points;

					}
				}
			} );

		}

		function ascSort( a, b ) {

			return a.distance - b.distance;

		}

		function intersectObject( object, raycaster, intersects, recursive ) {

			if ( object.layers.test( raycaster.layers ) ) {

				object.raycast( raycaster, intersects );

			}

			if ( recursive === true ) {

				var children = object.children;

				for ( var i = 0, l = children.length; i < l; i ++ ) {

					intersectObject( children[ i ], raycaster, intersects, true );

				}

			}

		}

		Object.assign( Raycaster.prototype, {

			set: function ( origin, direction ) {

				// direction is assumed to be normalized (for accurate distance calculations)

				this.ray.set( origin, direction );

			},

			setFromCamera: function ( coords, camera ) {

				if ( ( camera && camera.isPerspectiveCamera ) ) {

					this.ray.origin.setFromMatrixPosition( camera.matrixWorld );
					this.ray.direction.set( coords.x, coords.y, 0.5 ).unproject( camera ).sub( this.ray.origin ).normalize();
					this.camera = camera;

				} else if ( ( camera && camera.isOrthographicCamera ) ) {

					this.ray.origin.set( coords.x, coords.y, ( camera.near + camera.far ) / ( camera.near - camera.far ) ).unproject( camera ); // set origin in plane of camera
					this.ray.direction.set( 0, 0, - 1 ).transformDirection( camera.matrixWorld );
					this.camera = camera;

				} else {

					console.error( 'THREE.Raycaster: Unsupported camera type.' );

				}

			},

			intersectObject: function ( object, recursive, optionalTarget ) {

				var intersects = optionalTarget || [];

				intersectObject( object, this, intersects, recursive );

				intersects.sort( ascSort );

				return intersects;

			},

			intersectObjects: function ( objects, recursive, optionalTarget ) {

				var intersects = optionalTarget || [];

				if ( Array.isArray( objects ) === false ) {

					console.warn( 'THREE.Raycaster.intersectObjects: objects is not an Array.' );
					return intersects;

				}

				for ( var i = 0, l = objects.length; i < l; i ++ ) {

					intersectObject( objects[ i ], this, intersects, recursive );

				}

				intersects.sort( ascSort );

				return intersects;

			}

		} );

		/**
		 * Ref: https://en.wikipedia.org/wiki/Spherical_coordinate_system
		 *
		 * The polar angle (phi) is measured from the positive y-axis. The positive y-axis is up.
		 * The azimuthal angle (theta) is measured from the positive z-axis.
		 */

		var Spherical = function Spherical( radius, phi, theta ) {
			if ( radius === void 0 ) radius = 1;
			if ( phi === void 0 ) phi = 0;
			if ( theta === void 0 ) theta = 0;


			this.radius = radius;
			this.phi = phi; // polar angle
			this.theta = theta; // azimuthal angle

			return this;

		};

		Spherical.prototype.set = function set ( radius, phi, theta ) {

			this.radius = radius;
			this.phi = phi;
			this.theta = theta;

			return this;

		};

		Spherical.prototype.clone = function clone () {

			return new this.constructor().copy( this );

		};

		Spherical.prototype.copy = function copy ( other ) {

			this.radius = other.radius;
			this.phi = other.phi;
			this.theta = other.theta;

			return this;

		};

		// restrict phi to be betwee EPS and PI-EPS
		Spherical.prototype.makeSafe = function makeSafe () {

			var EPS = 0.000001;
			this.phi = Math.max( EPS, Math.min( Math.PI - EPS, this.phi ) );

			return this;

		};

		Spherical.prototype.setFromVector3 = function setFromVector3 ( v ) {

			return this.setFromCartesianCoords( v.x, v.y, v.z );

		};

		Spherical.prototype.setFromCartesianCoords = function setFromCartesianCoords ( x, y, z ) {

			this.radius = Math.sqrt( x * x + y * y + z * z );

			if ( this.radius === 0 ) {

				this.theta = 0;
				this.phi = 0;

			} else {

				this.theta = Math.atan2( x, z );
				this.phi = Math.acos( MathUtils.clamp( y / this.radius, - 1, 1 ) );

			}

			return this;

		};

		/**
		 * Ref: https://en.wikipedia.org/wiki/Cylindrical_coordinate_system
		 */

		var Cylindrical = function Cylindrical( radius, theta, y ) {

			this.radius = ( radius !== undefined ) ? radius : 1.0; // distance from the origin to a point in the x-z plane
			this.theta = ( theta !== undefined ) ? theta : 0; // counterclockwise angle in the x-z plane measured in radians from the positive z-axis
			this.y = ( y !== undefined ) ? y : 0; // height above the x-z plane

			return this;

		};

		Cylindrical.prototype.set = function set ( radius, theta, y ) {

			this.radius = radius;
			this.theta = theta;
			this.y = y;

			return this;

		};

		Cylindrical.prototype.clone = function clone () {

			return new this.constructor().copy( this );

		};

		Cylindrical.prototype.copy = function copy ( other ) {

			this.radius = other.radius;
			this.theta = other.theta;
			this.y = other.y;

			return this;

		};

		Cylindrical.prototype.setFromVector3 = function setFromVector3 ( v ) {

			return this.setFromCartesianCoords( v.x, v.y, v.z );

		};

		Cylindrical.prototype.setFromCartesianCoords = function setFromCartesianCoords ( x, y, z ) {

			this.radius = Math.sqrt( x * x + z * z );
			this.theta = Math.atan2( x, z );
			this.y = y;

			return this;

		};

		var _vector$7 = new Vector2();

		var Box2 = function Box2( min, max ) {

			Object.defineProperty( this, 'isBox2', { value: true } );

			this.min = ( min !== undefined ) ? min : new Vector2( + Infinity, + Infinity );
			this.max = ( max !== undefined ) ? max : new Vector2( - Infinity, - Infinity );

		};

		Box2.prototype.set = function set ( min, max ) {

			this.min.copy( min );
			this.max.copy( max );

			return this;

		};

		Box2.prototype.setFromPoints = function setFromPoints ( points ) {

			this.makeEmpty();

			for ( var i = 0, il = points.length; i < il; i ++ ) {

				this.expandByPoint( points[ i ] );

			}

			return this;

		};

		Box2.prototype.setFromCenterAndSize = function setFromCenterAndSize ( center, size ) {

			var halfSize = _vector$7.copy( size ).multiplyScalar( 0.5 );
			this.min.copy( center ).sub( halfSize );
			this.max.copy( center ).add( halfSize );

			return this;

		};

		Box2.prototype.clone = function clone () {

			return new this.constructor().copy( this );

		};

		Box2.prototype.copy = function copy ( box ) {

			this.min.copy( box.min );
			this.max.copy( box.max );

			return this;

		};

		Box2.prototype.makeEmpty = function makeEmpty () {

			this.min.x = this.min.y = + Infinity;
			this.max.x = this.max.y = - Infinity;

			return this;

		};

		Box2.prototype.isEmpty = function isEmpty () {

			// this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes

			return ( this.max.x < this.min.x ) || ( this.max.y < this.min.y );

		};

		Box2.prototype.getCenter = function getCenter ( target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Box2: .getCenter() target is now required' );
				target = new Vector2();

			}

			return this.isEmpty() ? target.set( 0, 0 ) : target.addVectors( this.min, this.max ).multiplyScalar( 0.5 );

		};

		Box2.prototype.getSize = function getSize ( target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Box2: .getSize() target is now required' );
				target = new Vector2();

			}

			return this.isEmpty() ? target.set( 0, 0 ) : target.subVectors( this.max, this.min );

		};

		Box2.prototype.expandByPoint = function expandByPoint ( point ) {

			this.min.min( point );
			this.max.max( point );

			return this;

		};

		Box2.prototype.expandByVector = function expandByVector ( vector ) {

			this.min.sub( vector );
			this.max.add( vector );

			return this;

		};

		Box2.prototype.expandByScalar = function expandByScalar ( scalar ) {

			this.min.addScalar( - scalar );
			this.max.addScalar( scalar );

			return this;

		};

		Box2.prototype.containsPoint = function containsPoint ( point ) {

			return point.x < this.min.x || point.x > this.max.x ||
				point.y < this.min.y || point.y > this.max.y ? false : true;

		};

		Box2.prototype.containsBox = function containsBox ( box ) {

			return this.min.x <= box.min.x && box.max.x <= this.max.x &&
				this.min.y <= box.min.y && box.max.y <= this.max.y;

		};

		Box2.prototype.getParameter = function getParameter ( point, target ) {

			// This can potentially have a divide by zero if the box
			// has a size dimension of 0.

			if ( target === undefined ) {

				console.warn( 'THREE.Box2: .getParameter() target is now required' );
				target = new Vector2();

			}

			return target.set(
				( point.x - this.min.x ) / ( this.max.x - this.min.x ),
				( point.y - this.min.y ) / ( this.max.y - this.min.y )
			);

		};

		Box2.prototype.intersectsBox = function intersectsBox ( box ) {

			// using 4 splitting planes to rule out intersections

			return box.max.x < this.min.x || box.min.x > this.max.x ||
				box.max.y < this.min.y || box.min.y > this.max.y ? false : true;

		};

		Box2.prototype.clampPoint = function clampPoint ( point, target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Box2: .clampPoint() target is now required' );
				target = new Vector2();

			}

			return target.copy( point ).clamp( this.min, this.max );

		};

		Box2.prototype.distanceToPoint = function distanceToPoint ( point ) {

			var clampedPoint = _vector$7.copy( point ).clamp( this.min, this.max );
			return clampedPoint.sub( point ).length();

		};

		Box2.prototype.intersect = function intersect ( box ) {

			this.min.max( box.min );
			this.max.min( box.max );

			return this;

		};

		Box2.prototype.union = function union ( box ) {

			this.min.min( box.min );
			this.max.max( box.max );

			return this;

		};

		Box2.prototype.translate = function translate ( offset ) {

			this.min.add( offset );
			this.max.add( offset );

			return this;

		};

		Box2.prototype.equals = function equals ( box ) {

			return box.min.equals( this.min ) && box.max.equals( this.max );

		};

		var _startP = new Vector3();
		var _startEnd = new Vector3();

		var Line3 = function Line3( start, end ) {

			this.start = ( start !== undefined ) ? start : new Vector3();
			this.end = ( end !== undefined ) ? end : new Vector3();

		};

		Line3.prototype.set = function set ( start, end ) {

			this.start.copy( start );
			this.end.copy( end );

			return this;

		};

		Line3.prototype.clone = function clone () {

			return new this.constructor().copy( this );

		};

		Line3.prototype.copy = function copy ( line ) {

			this.start.copy( line.start );
			this.end.copy( line.end );

			return this;

		};

		Line3.prototype.getCenter = function getCenter ( target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Line3: .getCenter() target is now required' );
				target = new Vector3();

			}

			return target.addVectors( this.start, this.end ).multiplyScalar( 0.5 );

		};

		Line3.prototype.delta = function delta ( target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Line3: .delta() target is now required' );
				target = new Vector3();

			}

			return target.subVectors( this.end, this.start );

		};

		Line3.prototype.distanceSq = function distanceSq () {

			return this.start.distanceToSquared( this.end );

		};

		Line3.prototype.distance = function distance () {

			return this.start.distanceTo( this.end );

		};

		Line3.prototype.at = function at ( t, target ) {

			if ( target === undefined ) {

				console.warn( 'THREE.Line3: .at() target is now required' );
				target = new Vector3();

			}

			return this.delta( target ).multiplyScalar( t ).add( this.start );

		};

		Line3.prototype.closestPointToPointParameter = function closestPointToPointParameter ( point, clampToLine ) {

			_startP.subVectors( point, this.start );
			_startEnd.subVectors( this.end, this.start );

			var startEnd2 = _startEnd.dot( _startEnd );
			var startEnd_startP = _startEnd.dot( _startP );

			var t = startEnd_startP / startEnd2;

			if ( clampToLine ) {

				t = MathUtils.clamp( t, 0, 1 );

			}

			return t;

		};

		Line3.prototype.closestPointToPoint = function closestPointToPoint ( point, clampToLine, target ) {

			var t = this.closestPointToPointParameter( point, clampToLine );

			if ( target === undefined ) {

				console.warn( 'THREE.Line3: .closestPointToPoint() target is now required' );
				target = new Vector3();

			}

			return this.delta( target ).multiplyScalar( t ).add( this.start );

		};

		Line3.prototype.applyMatrix4 = function applyMatrix4 ( matrix ) {

			this.start.applyMatrix4( matrix );
			this.end.applyMatrix4( matrix );

			return this;

		};

		Line3.prototype.equals = function equals ( line ) {

			return line.start.equals( this.start ) && line.end.equals( this.end );

		};

		function ImmediateRenderObject( material ) {

			Object3D.call( this );

			this.material = material;
			this.render = function ( /* renderCallback */ ) {};

			this.hasPositions = false;
			this.hasNormals = false;
			this.hasColors = false;
			this.hasUvs = false;

			this.positionArray = null;
			this.normalArray = null;
			this.colorArray = null;
			this.uvArray = null;

			this.count = 0;

		}

		ImmediateRenderObject.prototype = Object.create( Object3D.prototype );
		ImmediateRenderObject.prototype.constructor = ImmediateRenderObject;

		ImmediateRenderObject.prototype.isImmediateRenderObject = true;

		var _vector$8 = new Vector3();

			function SpotLightHelper( light, color ) {

				Object3D.call(this);
				this.light = light;
				this.light.updateMatrixWorld();

				this.matrix = light.matrixWorld;
				this.matrixAutoUpdate = false;

				this.color = color;

				var geometry = new BufferGeometry();

				var positions = [
					0, 0, 0, 	0, 0, 1,
					0, 0, 0, 	1, 0, 1,
					0, 0, 0,	- 1, 0, 1,
					0, 0, 0, 	0, 1, 1,
					0, 0, 0, 	0, - 1, 1
				];

				for ( var i = 0, j = 1, l = 32; i < l; i ++, j ++ ) {

					var p1 = ( i / l ) * Math.PI * 2;
					var p2 = ( j / l ) * Math.PI * 2;

					positions.push(
						Math.cos( p1 ), Math.sin( p1 ), 1,
						Math.cos( p2 ), Math.sin( p2 ), 1
					);

				}

				geometry.setAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );

				var material = new LineBasicMaterial( { fog: false, toneMapped: false } );

				this.cone = new LineSegments( geometry, material );
				this.add( this.cone );

				this.update();

			}

			SpotLightHelper.prototype = Object.create( Object3D.prototype );
			SpotLightHelper.prototype.constructor = SpotLightHelper;

			SpotLightHelper.prototype.dispose = function dispose () {

				this.cone.geometry.dispose();
				this.cone.material.dispose();

			};

			SpotLightHelper.prototype.update = function update () {

				this.light.updateMatrixWorld();

				var coneLength = this.light.distance ? this.light.distance : 1000;
				var coneWidth = coneLength * Math.tan( this.light.angle );

				this.cone.scale.set( coneWidth, coneWidth, coneLength );

				_vector$8.setFromMatrixPosition( this.light.target.matrixWorld );

				this.cone.lookAt( _vector$8 );

				if ( this.color !== undefined ) {

					this.cone.material.color.set( this.color );

				} else {

					this.cone.material.color.copy( this.light.color );

				}

			};

		var _vector$9 = new Vector3();
		var _boneMatrix = new Matrix4();
		var _matrixWorldInv = new Matrix4();


			function SkeletonHelper( object ) {

				var bones = getBoneList( object );

				var geometry = new BufferGeometry();

				var vertices = [];
				var colors = [];

				var color1 = new Color( 0, 0, 1 );
				var color2 = new Color( 0, 1, 0 );

				for ( var i = 0; i < bones.length; i ++ ) {

					var bone = bones[ i ];

					if ( bone.parent && bone.parent.isBone ) {

						vertices.push( 0, 0, 0 );
						vertices.push( 0, 0, 0 );
						colors.push( color1.r, color1.g, color1.b );
						colors.push( color2.r, color2.g, color2.b );

					}

				}

				geometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
				geometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );

				var material = new LineBasicMaterial( { vertexColors: true, depthTest: false, depthWrite: false, toneMapped: false, transparent: true } );

				LineSegments.call( this, geometry, material );

				this.type = 'SkeletonHelper';
				this.isSkeletonHelper = true;

				this.root = object;
				this.bones = bones;

				this.matrix = object.matrixWorld;
				this.matrixAutoUpdate = false;

			}

			SkeletonHelper.prototype = Object.create( LineSegments.prototype );
			SkeletonHelper.prototype.constructor = SkeletonHelper;

			SkeletonHelper.prototype.updateMatrixWorld = function updateMatrixWorld ( force ) {

				var bones = this.bones;

				var geometry = this.geometry;
				var position = geometry.getAttribute( 'position' );

				_matrixWorldInv.getInverse( this.root.matrixWorld );

				for ( var i = 0, j = 0; i < bones.length; i ++ ) {

					var bone = bones[ i ];

					if ( bone.parent && bone.parent.isBone ) {

						_boneMatrix.multiplyMatrices( _matrixWorldInv, bone.matrixWorld );
						_vector$9.setFromMatrixPosition( _boneMatrix );
						position.setXYZ( j, _vector$9.x, _vector$9.y, _vector$9.z );

						_boneMatrix.multiplyMatrices( _matrixWorldInv, bone.parent.matrixWorld );
						_vector$9.setFromMatrixPosition( _boneMatrix );
						position.setXYZ( j + 1, _vector$9.x, _vector$9.y, _vector$9.z );

						j += 2;

					}

				}

				geometry.getAttribute( 'position' ).needsUpdate = true;

				LineSegments.prototype.updateMatrixWorld.call( this, force );

			};


		function getBoneList( object ) {

			var boneList = [];

			if ( object && object.isBone ) {

				boneList.push( object );

			}

			for ( var i = 0; i < object.children.length; i ++ ) {

				boneList.push.apply( boneList, getBoneList( object.children[ i ] ) );

			}

			return boneList;

		}

		function PointLightHelper( light, sphereSize, color ) {

				var geometry = new SphereBufferGeometry( sphereSize, 4, 2 );
				var material = new MeshBasicMaterial( { wireframe: true, fog: false, toneMapped: false } );

				Mesh.call( this, geometry, material );

				this.light = light;
				this.light.updateMatrixWorld();

				this.color = color;

				this.type = 'PointLightHelper';

				this.matrix = this.light.matrixWorld;
				this.matrixAutoUpdate = false;

				this.update();


				/*
			// TODO: delete this comment?
			const distanceGeometry = new THREE.IcosahedronBufferGeometry( 1, 2 );
			const distanceMaterial = new THREE.MeshBasicMaterial( { color: hexColor, fog: false, wireframe: true, opacity: 0.1, transparent: true } );

			this.lightSphere = new THREE.Mesh( bulbGeometry, bulbMaterial );
			this.lightDistance = new THREE.Mesh( distanceGeometry, distanceMaterial );

			const d = light.distance;

			if ( d === 0.0 ) {

				this.lightDistance.visible = false;

			} else {

				this.lightDistance.scale.set( d, d, d );

			}

			this.add( this.lightDistance );
			*/

			}

			PointLightHelper.prototype = Object.create( Mesh.prototype );
			PointLightHelper.prototype.constructor = PointLightHelper;

			PointLightHelper.prototype.dispose = function dispose () {

				this.geometry.dispose();
				this.material.dispose();

			};

			PointLightHelper.prototype.update = function update () {

				if ( this.color !== undefined ) {

					this.material.color.set( this.color );

				} else {

					this.material.color.copy( this.light.color );

				}

				/*
				const d = this.light.distance;

				if ( d === 0.0 ) {

					this.lightDistance.visible = false;

				} else {

					this.lightDistance.visible = true;
					this.lightDistance.scale.set( d, d, d );

				}
				*/

			};

		var _vector$a = new Vector3();
		var _color1 = new Color();
		var _color2 = new Color();

			function HemisphereLightHelper( light, size, color ) {

				Object3D.call(this);
				this.light = light;
				this.light.updateMatrixWorld();

				this.matrix = light.matrixWorld;
				this.matrixAutoUpdate = false;

				this.color = color;

				var geometry = new OctahedronBufferGeometry( size );
				geometry.rotateY( Math.PI * 0.5 );

				this.material = new MeshBasicMaterial( { wireframe: true, fog: false, toneMapped: false } );
				if ( this.color === undefined ) { this.material.vertexColors = true; }

				var position = geometry.getAttribute( 'position' );
				var colors = new Float32Array( position.count * 3 );

				geometry.setAttribute( 'color', new BufferAttribute( colors, 3 ) );

				this.add( new Mesh( geometry, this.material ) );

				this.update();

			}

			HemisphereLightHelper.prototype = Object.create( Object3D.prototype );
			HemisphereLightHelper.prototype.constructor = HemisphereLightHelper;

			HemisphereLightHelper.prototype.dispose = function dispose () {

				this.children[ 0 ].geometry.dispose();
				this.children[ 0 ].material.dispose();

			};

			HemisphereLightHelper.prototype.update = function update () {

				var mesh = this.children[ 0 ];

				if ( this.color !== undefined ) {

					this.material.color.set( this.color );

				} else {

					var colors = mesh.geometry.getAttribute( 'color' );

					_color1.copy( this.light.color );
					_color2.copy( this.light.groundColor );

					for ( var i = 0, l = colors.count; i < l; i ++ ) {

						var color = ( i < ( l / 2 ) ) ? _color1 : _color2;

						colors.setXYZ( i, color.r, color.g, color.b );

					}

					colors.needsUpdate = true;

				}

				mesh.lookAt( _vector$a.setFromMatrixPosition( this.light.matrixWorld ).negate() );

			};

		function GridHelper( size, divisions, color1, color2 ) {

				size = size || 10;
				divisions = divisions || 10;
				color1 = new Color( color1 !== undefined ? color1 : 0x444444 );
				color2 = new Color( color2 !== undefined ? color2 : 0x888888 );

				var center = divisions / 2;
				var step = size / divisions;
				var halfSize = size / 2;

				var vertices = [], colors = [];

				for ( var i = 0, j = 0, k = - halfSize; i <= divisions; i ++, k += step ) {

					vertices.push( - halfSize, 0, k, halfSize, 0, k );
					vertices.push( k, 0, - halfSize, k, 0, halfSize );

					var color = i === center ? color1 : color2;

					color.toArray( colors, j ); j += 3;
					color.toArray( colors, j ); j += 3;
					color.toArray( colors, j ); j += 3;
					color.toArray( colors, j ); j += 3;

				}

				var geometry = new BufferGeometry();
				geometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
				geometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );

				var material = new LineBasicMaterial( { vertexColors: true, toneMapped: false } );

				LineSegments.call( this, geometry, material );

				this.type = 'GridHelper';

			}

			GridHelper.prototype = Object.create( LineSegments.prototype );
			GridHelper.prototype.constructor = GridHelper;

		function PolarGridHelper( radius, radials, circles, divisions, color1, color2 ) {

				radius = radius || 10;
				radials = radials || 16;
				circles = circles || 8;
				divisions = divisions || 64;
				color1 = new Color( color1 !== undefined ? color1 : 0x444444 );
				color2 = new Color( color2 !== undefined ? color2 : 0x888888 );

				var vertices = [];
				var colors = [];

				// create the radials

				for ( var i = 0; i <= radials; i ++ ) {

					var v = ( i / radials ) * ( Math.PI * 2 );

					var x = Math.sin( v ) * radius;
					var z = Math.cos( v ) * radius;

					vertices.push( 0, 0, 0 );
					vertices.push( x, 0, z );

					var color = ( i & 1 ) ? color1 : color2;

					colors.push( color.r, color.g, color.b );
					colors.push( color.r, color.g, color.b );

				}

				// create the circles

				for ( var i$1 = 0; i$1 <= circles; i$1 ++ ) {

					var color$1 = ( i$1 & 1 ) ? color1 : color2;

					var r = radius - ( radius / circles * i$1 );

					for ( var j = 0; j < divisions; j ++ ) {

						// first vertex

						var v$1 = ( j / divisions ) * ( Math.PI * 2 );

						var x$1 = Math.sin( v$1 ) * r;
						var z$1 = Math.cos( v$1 ) * r;

						vertices.push( x$1, 0, z$1 );
						colors.push( color$1.r, color$1.g, color$1.b );

						// second vertex

						v$1 = ( ( j + 1 ) / divisions ) * ( Math.PI * 2 );

						x$1 = Math.sin( v$1 ) * r;
						z$1 = Math.cos( v$1 ) * r;

						vertices.push( x$1, 0, z$1 );
						colors.push( color$1.r, color$1.g, color$1.b );

					}

				}

				var geometry = new BufferGeometry();
				geometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
				geometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );

				var material = new LineBasicMaterial( { vertexColors: true, toneMapped: false } );

				LineSegments.call( this, geometry, material );

				this.type = 'PolarGridHelper';

			}

			PolarGridHelper.prototype = Object.create( LineSegments.prototype );
			PolarGridHelper.prototype.constructor = PolarGridHelper;

		var _v1$5 = new Vector3();
		var _v2$3 = new Vector3();
		var _v3$1 = new Vector3();

			function DirectionalLightHelper( light, size, color ) {

				Object3D.call(this);
				this.light = light;
				this.light.updateMatrixWorld();

				this.matrix = light.matrixWorld;
				this.matrixAutoUpdate = false;

				this.color = color;

				if ( size === undefined ) { size = 1; }

				var geometry = new BufferGeometry();
				geometry.setAttribute( 'position', new Float32BufferAttribute( [
					- size, size, 0,
					size, size, 0,
					size, - size, 0,
					- size, - size, 0,
					- size, size, 0
				], 3 ) );

				var material = new LineBasicMaterial( { fog: false, toneMapped: false } );

				this.lightPlane = new Line( geometry, material );
				this.add( this.lightPlane );

				geometry = new BufferGeometry();
				geometry.setAttribute( 'position', new Float32BufferAttribute( [ 0, 0, 0, 0, 0, 1 ], 3 ) );

				this.targetLine = new Line( geometry, material );
				this.add( this.targetLine );

				this.update();

			}

			DirectionalLightHelper.prototype = Object.create( Object3D.prototype );
			DirectionalLightHelper.prototype.constructor = DirectionalLightHelper;

			DirectionalLightHelper.prototype.dispose = function dispose () {

				this.lightPlane.geometry.dispose();
				this.lightPlane.material.dispose();
				this.targetLine.geometry.dispose();
				this.targetLine.material.dispose();

			};

			DirectionalLightHelper.prototype.update = function update () {

				_v1$5.setFromMatrixPosition( this.light.matrixWorld );
				_v2$3.setFromMatrixPosition( this.light.target.matrixWorld );
				_v3$1.subVectors( _v2$3, _v1$5 );

				this.lightPlane.lookAt( _v2$3 );

				if ( this.color !== undefined ) {

					this.lightPlane.material.color.set( this.color );
					this.targetLine.material.color.set( this.color );

				} else {

					this.lightPlane.material.color.copy( this.light.color );
					this.targetLine.material.color.copy( this.light.color );

				}

				this.targetLine.lookAt( _v2$3 );
				this.targetLine.scale.z = _v3$1.length();

			};

		var _vector$b = new Vector3();
		var _camera = new Camera();

		/**
		 *	- shows frustum, line of sight and up of the camera
		 *	- suitable for fast updates
		 * 	- based on frustum visualization in lightgl.js shadowmap example
		 *		http://evanw.github.com/lightgl.js/tests/shadowmap.html
		 */

			function CameraHelper( camera ) {

				var geometry = new BufferGeometry();
				var material = new LineBasicMaterial( { color: 0xffffff, vertexColors: true, toneMapped: false } );

				var vertices = [];
				var colors = [];

				var pointMap = {};

				// colors

				var colorFrustum = new Color( 0xffaa00 );
				var colorCone = new Color( 0xff0000 );
				var colorUp = new Color( 0x00aaff );
				var colorTarget = new Color( 0xffffff );
				var colorCross = new Color( 0x333333 );

				// near

				addLine( 'n1', 'n2', colorFrustum );
				addLine( 'n2', 'n4', colorFrustum );
				addLine( 'n4', 'n3', colorFrustum );
				addLine( 'n3', 'n1', colorFrustum );

				// far

				addLine( 'f1', 'f2', colorFrustum );
				addLine( 'f2', 'f4', colorFrustum );
				addLine( 'f4', 'f3', colorFrustum );
				addLine( 'f3', 'f1', colorFrustum );

				// sides

				addLine( 'n1', 'f1', colorFrustum );
				addLine( 'n2', 'f2', colorFrustum );
				addLine( 'n3', 'f3', colorFrustum );
				addLine( 'n4', 'f4', colorFrustum );

				// cone

				addLine( 'p', 'n1', colorCone );
				addLine( 'p', 'n2', colorCone );
				addLine( 'p', 'n3', colorCone );
				addLine( 'p', 'n4', colorCone );

				// up

				addLine( 'u1', 'u2', colorUp );
				addLine( 'u2', 'u3', colorUp );
				addLine( 'u3', 'u1', colorUp );

				// target

				addLine( 'c', 't', colorTarget );
				addLine( 'p', 'c', colorCross );

				// cross

				addLine( 'cn1', 'cn2', colorCross );
				addLine( 'cn3', 'cn4', colorCross );

				addLine( 'cf1', 'cf2', colorCross );
				addLine( 'cf3', 'cf4', colorCross );

				function addLine( a, b, color ) {

					addPoint( a, color );
					addPoint( b, color );

				}

				function addPoint( id, color ) {

					vertices.push( 0, 0, 0 );
					colors.push( color.r, color.g, color.b );

					if ( pointMap[ id ] === undefined ) {

						pointMap[ id ] = [];

					}

					pointMap[ id ].push( ( vertices.length / 3 ) - 1 );

				}

				geometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
				geometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );

				LineSegments.call( this, geometry, material );

				this.type = 'CameraHelper';

				this.camera = camera;
				if ( this.camera.updateProjectionMatrix ) { this.camera.updateProjectionMatrix(); }

				this.matrix = camera.matrixWorld;
				this.matrixAutoUpdate = false;

				this.pointMap = pointMap;

				this.update();

			}

			CameraHelper.prototype = Object.create( LineSegments.prototype );
			CameraHelper.prototype.constructor = CameraHelper;

			CameraHelper.prototype.update = function update () {

				var geometry = this.geometry;
				var pointMap = this.pointMap;

				var w = 1, h = 1;

				// we need just camera projection matrix inverse
				// world matrix must be identity

				_camera.projectionMatrixInverse.copy( this.camera.projectionMatrixInverse );

				// center / target

				setPoint( 'c', pointMap, geometry, _camera, 0, 0, - 1 );
				setPoint( 't', pointMap, geometry, _camera, 0, 0, 1 );

				// near

				setPoint( 'n1', pointMap, geometry, _camera, - w, - h, - 1 );
				setPoint( 'n2', pointMap, geometry, _camera, w, - h, - 1 );
				setPoint( 'n3', pointMap, geometry, _camera, - w, h, - 1 );
				setPoint( 'n4', pointMap, geometry, _camera, w, h, - 1 );

				// far

				setPoint( 'f1', pointMap, geometry, _camera, - w, - h, 1 );
				setPoint( 'f2', pointMap, geometry, _camera, w, - h, 1 );
				setPoint( 'f3', pointMap, geometry, _camera, - w, h, 1 );
				setPoint( 'f4', pointMap, geometry, _camera, w, h, 1 );

				// up

				setPoint( 'u1', pointMap, geometry, _camera, w * 0.7, h * 1.1, - 1 );
				setPoint( 'u2', pointMap, geometry, _camera, - w * 0.7, h * 1.1, - 1 );
				setPoint( 'u3', pointMap, geometry, _camera, 0, h * 2, - 1 );

				// cross

				setPoint( 'cf1', pointMap, geometry, _camera, - w, 0, 1 );
				setPoint( 'cf2', pointMap, geometry, _camera, w, 0, 1 );
				setPoint( 'cf3', pointMap, geometry, _camera, 0, - h, 1 );
				setPoint( 'cf4', pointMap, geometry, _camera, 0, h, 1 );

				setPoint( 'cn1', pointMap, geometry, _camera, - w, 0, - 1 );
				setPoint( 'cn2', pointMap, geometry, _camera, w, 0, - 1 );
				setPoint( 'cn3', pointMap, geometry, _camera, 0, - h, - 1 );
				setPoint( 'cn4', pointMap, geometry, _camera, 0, h, - 1 );

				geometry.getAttribute( 'position' ).needsUpdate = true;

			};


		function setPoint( point, pointMap, geometry, camera, x, y, z ) {

			_vector$b.set( x, y, z ).unproject( camera );

			var points = pointMap[ point ];

			if ( points !== undefined ) {

				var position = geometry.getAttribute( 'position' );

				for ( var i = 0, l = points.length; i < l; i ++ ) {

					position.setXYZ( points[ i ], _vector$b.x, _vector$b.y, _vector$b.z );

				}

			}

		}

		var _box$3 = new Box3();

			function BoxHelper( object, color ) {
				if ( color === void 0 ) color = 0xffff00;


				var indices = new Uint16Array( [ 0, 1, 1, 2, 2, 3, 3, 0, 4, 5, 5, 6, 6, 7, 7, 4, 0, 4, 1, 5, 2, 6, 3, 7 ] );
				var positions = new Float32Array( 8 * 3 );

				var geometry = new BufferGeometry();
				geometry.setIndex( new BufferAttribute( indices, 1 ) );
				geometry.setAttribute( 'position', new BufferAttribute( positions, 3 ) );

				LineSegments.call( this, geometry, new LineBasicMaterial( { color: color, toneMapped: false } ) );

				this.object = object;
				this.type = 'BoxHelper';

				this.matrixAutoUpdate = false;

				this.update();

			}

			BoxHelper.prototype = Object.create( LineSegments.prototype );
			BoxHelper.prototype.constructor = BoxHelper;

			BoxHelper.prototype.update = function update ( object ) {

				if ( object !== undefined ) {

					console.warn( 'THREE.BoxHelper: .update() has no longer arguments.' );

				}

				if ( this.object !== undefined ) {

					_box$3.setFromObject( this.object );

				}

				if ( _box$3.isEmpty() ) { return; }

				var min = _box$3.min;
				var max = _box$3.max;

				/*
					5____4
				1/___0/|
				| 6__|_7
				2/___3/

				0: max.x, max.y, max.z
				1: min.x, max.y, max.z
				2: min.x, min.y, max.z
				3: max.x, min.y, max.z
				4: max.x, max.y, min.z
				5: min.x, max.y, min.z
				6: min.x, min.y, min.z
				7: max.x, min.y, min.z
				*/

				var position = this.geometry.attributes.position;
				var array = position.array;

				array[ 0 ] = max.x; array[ 1 ] = max.y; array[ 2 ] = max.z;
				array[ 3 ] = min.x; array[ 4 ] = max.y; array[ 5 ] = max.z;
				array[ 6 ] = min.x; array[ 7 ] = min.y; array[ 8 ] = max.z;
				array[ 9 ] = max.x; array[ 10 ] = min.y; array[ 11 ] = max.z;
				array[ 12 ] = max.x; array[ 13 ] = max.y; array[ 14 ] = min.z;
				array[ 15 ] = min.x; array[ 16 ] = max.y; array[ 17 ] = min.z;
				array[ 18 ] = min.x; array[ 19 ] = min.y; array[ 20 ] = min.z;
				array[ 21 ] = max.x; array[ 22 ] = min.y; array[ 23 ] = min.z;

				position.needsUpdate = true;

				this.geometry.computeBoundingSphere();


			};

			BoxHelper.prototype.setFromObject = function setFromObject ( object ) {

				this.object = object;
				this.update();

				return this;

			};

			BoxHelper.prototype.copy = function copy ( source ) {

				LineSegments.prototype.copy.call( this, source );

				this.object = source.object;

				return this;

			};

		function Box3Helper( box, color ) {
				if ( color === void 0 ) color = 0xffff00;


				var indices = new Uint16Array( [ 0, 1, 1, 2, 2, 3, 3, 0, 4, 5, 5, 6, 6, 7, 7, 4, 0, 4, 1, 5, 2, 6, 3, 7 ] );

				var positions = [ 1, 1, 1, - 1, 1, 1, - 1, - 1, 1, 1, - 1, 1, 1, 1, - 1, - 1, 1, - 1, - 1, - 1, - 1, 1, - 1, - 1 ];

				var geometry = new BufferGeometry();

				geometry.setIndex( new BufferAttribute( indices, 1 ) );

				geometry.setAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );

				LineSegments.call( this, geometry, new LineBasicMaterial( { color: color, toneMapped: false } ) );

				this.box = box;

				this.type = 'Box3Helper';

				this.geometry.computeBoundingSphere();

			}

			Box3Helper.prototype = Object.create( LineSegments.prototype );
			Box3Helper.prototype.constructor = Box3Helper;

			Box3Helper.prototype.updateMatrixWorld = function updateMatrixWorld ( force ) {

				var box = this.box;

				if ( box.isEmpty() ) { return; }

				box.getCenter( this.position );

				box.getSize( this.scale );

				this.scale.multiplyScalar( 0.5 );

				LineSegments.prototype.updateMatrixWorld.call( this, force );

			};

		function PlaneHelper( plane, size, hex ) {

				var color = ( hex !== undefined ) ? hex : 0xffff00;

				var positions = [ 1, - 1, 1, - 1, 1, 1, - 1, - 1, 1, 1, 1, 1, - 1, 1, 1, - 1, - 1, 1, 1, - 1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0 ];

				var geometry = new BufferGeometry();
				geometry.setAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );
				geometry.computeBoundingSphere();

				Line.call( this, geometry, new LineBasicMaterial( { color: color, toneMapped: false } ) );

				this.type = 'PlaneHelper';

				this.plane = plane;

				this.size = ( size === undefined ) ? 1 : size;

				var positions2 = [ 1, 1, 1, - 1, 1, 1, - 1, - 1, 1, 1, 1, 1, - 1, - 1, 1, 1, - 1, 1 ];

				var geometry2 = new BufferGeometry();
				geometry2.setAttribute( 'position', new Float32BufferAttribute( positions2, 3 ) );
				geometry2.computeBoundingSphere();

				this.add( new Mesh( geometry2, new MeshBasicMaterial( { color: color, opacity: 0.2, transparent: true, depthWrite: false, toneMapped: false } ) ) );

			}

			PlaneHelper.prototype = Object.create( Line.prototype );
			PlaneHelper.prototype.constructor = PlaneHelper;

			PlaneHelper.prototype.updateMatrixWorld = function updateMatrixWorld ( force ) {

				var scale = - this.plane.constant;

				if ( Math.abs( scale ) < 1e-8 ) { scale = 1e-8; } // sign does not matter

				this.scale.set( 0.5 * this.size, 0.5 * this.size, scale );

				this.children[ 0 ].material.side = ( scale < 0 ) ? BackSide : FrontSide; // renderer flips side when determinant < 0; flipping not wanted here

				this.lookAt( this.plane.normal );

				Line.prototype.updateMatrixWorld.call( this, force );

			};

		var _axis = new Vector3();
		var _lineGeometry, _coneGeometry;

			function ArrowHelper( dir, origin, length, color, headLength, headWidth ) {

				Object3D.call(this);
				// dir is assumed to be normalized

				this.type = 'ArrowHelper';

				if ( dir === undefined ) { dir = new Vector3( 0, 0, 1 ); }
				if ( origin === undefined ) { origin = new Vector3( 0, 0, 0 ); }
				if ( length === undefined ) { length = 1; }
				if ( color === undefined ) { color = 0xffff00; }
				if ( headLength === undefined ) { headLength = 0.2 * length; }
				if ( headWidth === undefined ) { headWidth = 0.2 * headLength; }

				if ( _lineGeometry === undefined ) {

					_lineGeometry = new BufferGeometry();
					_lineGeometry.setAttribute( 'position', new Float32BufferAttribute( [ 0, 0, 0, 0, 1, 0 ], 3 ) );

					_coneGeometry = new CylinderBufferGeometry( 0, 0.5, 1, 5, 1 );
					_coneGeometry.translate( 0, - 0.5, 0 );

				}

				this.position.copy( origin );

				this.line = new Line( _lineGeometry, new LineBasicMaterial( { color: color, toneMapped: false } ) );
				this.line.matrixAutoUpdate = false;
				this.add( this.line );

				this.cone = new Mesh( _coneGeometry, new MeshBasicMaterial( { color: color, toneMapped: false } ) );
				this.cone.matrixAutoUpdate = false;
				this.add( this.cone );

				this.setDirection( dir );
				this.setLength( length, headLength, headWidth );

			}

			ArrowHelper.prototype = Object.create( Object3D.prototype );
			ArrowHelper.prototype.constructor = ArrowHelper;

			ArrowHelper.prototype.setDirection = function setDirection ( dir ) {

				// dir is assumed to be normalized

				if ( dir.y > 0.99999 ) {

					this.quaternion.set( 0, 0, 0, 1 );

				} else if ( dir.y < - 0.99999 ) {

					this.quaternion.set( 1, 0, 0, 0 );

				} else {

					_axis.set( dir.z, 0, - dir.x ).normalize();

					var radians = Math.acos( dir.y );

					this.quaternion.setFromAxisAngle( _axis, radians );

				}

			};

			ArrowHelper.prototype.setLength = function setLength ( length, headLength, headWidth ) {

				if ( headLength === undefined ) { headLength = 0.2 * length; }
				if ( headWidth === undefined ) { headWidth = 0.2 * headLength; }

				this.line.scale.set( 1, Math.max( 0.0001, length - headLength ), 1 ); // see #17458
				this.line.updateMatrix();

				this.cone.scale.set( headWidth, headLength, headWidth );
				this.cone.position.y = length;
				this.cone.updateMatrix();

			};

			ArrowHelper.prototype.setColor = function setColor ( color ) {

				this.line.material.color.set( color );
				this.cone.material.color.set( color );

			};

			ArrowHelper.prototype.copy = function copy ( source ) {

				Object3D.prototype.copy.call( this, source, false );

				this.line.copy( source.line );
				this.cone.copy( source.cone );

				return this;

			};

		function AxesHelper( size ) {
				if ( size === void 0 ) size = 1;


				var vertices = [
					0, 0, 0,	size, 0, 0,
					0, 0, 0,	0, size, 0,
					0, 0, 0,	0, 0, size
				];

				var colors = [
					1, 0, 0,	1, 0.6, 0,
					0, 1, 0,	0.6, 1, 0,
					0, 0, 1,	0, 0.6, 1
				];

				var geometry = new BufferGeometry();
				geometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
				geometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );

				var material = new LineBasicMaterial( { vertexColors: true, toneMapped: false } );

				LineSegments.call( this, geometry, material );

				this.type = 'AxesHelper';

			}

			AxesHelper.prototype = Object.create( LineSegments.prototype );
			AxesHelper.prototype.constructor = AxesHelper;

		var LOD_MIN = 4;
		var LOD_MAX = 8;
		var SIZE_MAX = Math.pow( 2, LOD_MAX );

		// The standard deviations (radians) associated with the extra mips. These are
		// chosen to approximate a Trowbridge-Reitz distribution function times the
		// geometric shadowing function. These sigma values squared must match the
		// variance #defines in cube_uv_reflection_fragment.glsl.js.
		var EXTRA_LOD_SIGMA = [ 0.125, 0.215, 0.35, 0.446, 0.526, 0.582 ];

		var TOTAL_LODS = LOD_MAX - LOD_MIN + 1 + EXTRA_LOD_SIGMA.length;

		// The maximum length of the blur for loop. Smaller sigmas will use fewer
		// samples and exit early, but not recompile the shader.
		var MAX_SAMPLES = 20;

		var ENCODINGS = {};
		ENCODINGS[ LinearEncoding ] = 0;
		ENCODINGS[ sRGBEncoding ] = 1;
		ENCODINGS[ RGBEEncoding ] = 2;
		ENCODINGS[ RGBM7Encoding ] = 3;
		ENCODINGS[ RGBM16Encoding ] = 4;
		ENCODINGS[ RGBDEncoding ] = 5;
		ENCODINGS[ GammaEncoding ] = 6;

		var _flatCamera = new OrthographicCamera();
		var ref = _createPlanes();
		var _lodPlanes = ref._lodPlanes;
		var _sizeLods = ref._sizeLods;
		var _sigmas = ref._sigmas;
		var _oldTarget = null;

		// Golden Ratio
		var PHI = ( 1 + Math.sqrt( 5 ) ) / 2;
		var INV_PHI = 1 / PHI;

		// Vertices of a dodecahedron (except the opposites, which represent the
		// same axis), used as axis directions evenly spread on a sphere.
		var _axisDirections = [
			new Vector3( 1, 1, 1 ),
			new Vector3( - 1, 1, 1 ),
			new Vector3( 1, 1, - 1 ),
			new Vector3( - 1, 1, - 1 ),
			new Vector3( 0, PHI, INV_PHI ),
			new Vector3( 0, PHI, - INV_PHI ),
			new Vector3( INV_PHI, 0, PHI ),
			new Vector3( - INV_PHI, 0, PHI ),
			new Vector3( PHI, INV_PHI, 0 ),
			new Vector3( - PHI, INV_PHI, 0 ) ];

		/**
		 * This class generates a Prefiltered, Mipmapped Radiance Environment Map
		 * (PMREM) from a cubeMap environment texture. This allows different levels of
		 * blur to be quickly accessed based on material roughness. It is packed into a
		 * special CubeUV format that allows us to perform custom interpolation so that
		 * we can support nonlinear formats such as RGBE. Unlike a traditional mipmap
		 * chain, it only goes down to the LOD_MIN level (above), and then creates extra
		 * even more filtered 'mips' at the same LOD_MIN resolution, associated with
		 * higher roughness levels. In this way we maintain resolution to smoothly
		 * interpolate diffuse lighting while limiting sampling computation.
		 */

		var PMREMGenerator = function PMREMGenerator( renderer ) {

			this._renderer = renderer;
			this._pingPongRenderTarget = null;

			this._blurMaterial = _getBlurShader( MAX_SAMPLES );
			this._equirectShader = null;
			this._cubemapShader = null;

			this._compileMaterial( this._blurMaterial );

		};

		/**
			 * Generates a PMREM from a supplied Scene, which can be faster than using an
			 * image if networking bandwidth is low. Optional sigma specifies a blur radius
			 * in radians to be applied to the scene before PMREM generation. Optional near
			 * and far planes ensure the scene is rendered in its entirety (the cubeCamera
			 * is placed at the origin).
			 */
		PMREMGenerator.prototype.fromScene = function fromScene ( scene, sigma, near, far ) {
				if ( sigma === void 0 ) sigma = 0;
				if ( near === void 0 ) near = 0.1;
				if ( far === void 0 ) far = 100;


			_oldTarget = this._renderer.getRenderTarget();
			var cubeUVRenderTarget = this._allocateTargets();

			this._sceneToCubeUV( scene, near, far, cubeUVRenderTarget );
			if ( sigma > 0 ) {

				this._blur( cubeUVRenderTarget, 0, 0, sigma );

			}

			this._applyPMREM( cubeUVRenderTarget );
			this._cleanup( cubeUVRenderTarget );

			return cubeUVRenderTarget;

		};

		/**
			 * Generates a PMREM from an equirectangular texture, which can be either LDR
			 * (RGBFormat) or HDR (RGBEFormat). The ideal input image size is 1k (1024 x 512),
			 * as this matches best with the 256 x 256 cubemap output.
			 */
		PMREMGenerator.prototype.fromEquirectangular = function fromEquirectangular ( equirectangular ) {

			return this._fromTexture( equirectangular );

		};

		/**
			 * Generates a PMREM from an cubemap texture, which can be either LDR
			 * (RGBFormat) or HDR (RGBEFormat). The ideal input cube size is 256 x 256,
			 * as this matches best with the 256 x 256 cubemap output.
			 */
		PMREMGenerator.prototype.fromCubemap = function fromCubemap ( cubemap ) {

			return this._fromTexture( cubemap );

		};

		/**
			 * Pre-compiles the cubemap shader. You can get faster start-up by invoking this method during
			 * your texture's network fetch for increased concurrency.
			 */
		PMREMGenerator.prototype.compileCubemapShader = function compileCubemapShader () {

			if ( this._cubemapShader === null ) {

				this._cubemapShader = _getCubemapShader();
				this._compileMaterial( this._cubemapShader );

			}

		};

		/**
			 * Pre-compiles the equirectangular shader. You can get faster start-up by invoking this method during
			 * your texture's network fetch for increased concurrency.
			 */
		PMREMGenerator.prototype.compileEquirectangularShader = function compileEquirectangularShader () {

			if ( this._equirectShader === null ) {

				this._equirectShader = _getEquirectShader();
				this._compileMaterial( this._equirectShader );

			}

		};

		/**
			 * Disposes of the PMREMGenerator's internal memory. Note that PMREMGenerator is a static class,
			 * so you should not need more than one PMREMGenerator object. If you do, calling dispose() on
			 * one of them will cause any others to also become unusable.
			 */
		PMREMGenerator.prototype.dispose = function dispose () {

			this._blurMaterial.dispose();

			if ( this._cubemapShader !== null ) { this._cubemapShader.dispose(); }
			if ( this._equirectShader !== null ) { this._equirectShader.dispose(); }

			for ( var i = 0; i < _lodPlanes.length; i ++ ) {

				_lodPlanes[ i ].dispose();

			}

		};

		// private interface

		PMREMGenerator.prototype._cleanup = function _cleanup ( outputTarget ) {

			this._pingPongRenderTarget.dispose();
			this._renderer.setRenderTarget( _oldTarget );
			outputTarget.scissorTest = false;
			_setViewport( outputTarget, 0, 0, outputTarget.width, outputTarget.height );

		};

		PMREMGenerator.prototype._fromTexture = function _fromTexture ( texture ) {

			_oldTarget = this._renderer.getRenderTarget();
			var cubeUVRenderTarget = this._allocateTargets( texture );
			this._textureToCubeUV( texture, cubeUVRenderTarget );
			this._applyPMREM( cubeUVRenderTarget );
			this._cleanup( cubeUVRenderTarget );

			return cubeUVRenderTarget;

		};

		PMREMGenerator.prototype._allocateTargets = function _allocateTargets ( texture ) { // warning: null texture is valid

			var params = {
				magFilter: NearestFilter,
				minFilter: NearestFilter,
				generateMipmaps: false,
				type: UnsignedByteType,
				format: RGBEFormat,
				encoding: _isLDR( texture ) ? texture.encoding : RGBEEncoding,
				depthBuffer: false
			};

			var cubeUVRenderTarget = _createRenderTarget( params );
			cubeUVRenderTarget.depthBuffer = texture ? false : true;
			this._pingPongRenderTarget = _createRenderTarget( params );
			return cubeUVRenderTarget;

		};

		PMREMGenerator.prototype._compileMaterial = function _compileMaterial ( material ) {

			var tmpMesh = new Mesh( _lodPlanes[ 0 ], material );
			this._renderer.compile( tmpMesh, _flatCamera );

		};

		PMREMGenerator.prototype._sceneToCubeUV = function _sceneToCubeUV ( scene, near, far, cubeUVRenderTarget ) {

			var fov = 90;
			var aspect = 1;
			var cubeCamera = new PerspectiveCamera( fov, aspect, near, far );
			var upSign = [ 1, - 1, 1, 1, 1, 1 ];
			var forwardSign = [ 1, 1, 1, - 1, - 1, - 1 ];
			var renderer = this._renderer;

			var outputEncoding = renderer.outputEncoding;
			var toneMapping = renderer.toneMapping;
			var clearColor = renderer.getClearColor();
			var clearAlpha = renderer.getClearAlpha();

			renderer.toneMapping = NoToneMapping;
			renderer.outputEncoding = LinearEncoding;

			var background = scene.background;
			if ( background && background.isColor ) {

				background.convertSRGBToLinear();
				// Convert linear to RGBE
				var maxComponent = Math.max( background.r, background.g, background.b );
				var fExp = Math.min( Math.max( Math.ceil( Math.log2( maxComponent ) ), - 128.0 ), 127.0 );
				background = background.multiplyScalar( Math.pow( 2.0, - fExp ) );
				var alpha = ( fExp + 128.0 ) / 255.0;
				renderer.setClearColor( background, alpha );
				scene.background = null;

			}

			for ( var i = 0; i < 6; i ++ ) {

				var col = i % 3;
				if ( col == 0 ) {

					cubeCamera.up.set( 0, upSign[ i ], 0 );
					cubeCamera.lookAt( forwardSign[ i ], 0, 0 );

				} else if ( col == 1 ) {

					cubeCamera.up.set( 0, 0, upSign[ i ] );
					cubeCamera.lookAt( 0, forwardSign[ i ], 0 );

				} else {

					cubeCamera.up.set( 0, upSign[ i ], 0 );
					cubeCamera.lookAt( 0, 0, forwardSign[ i ] );

				}

				_setViewport( cubeUVRenderTarget,
					col * SIZE_MAX, i > 2 ? SIZE_MAX : 0, SIZE_MAX, SIZE_MAX );
				renderer.setRenderTarget( cubeUVRenderTarget );
				renderer.render( scene, cubeCamera );

			}

			renderer.toneMapping = toneMapping;
			renderer.outputEncoding = outputEncoding;
			renderer.setClearColor( clearColor, clearAlpha );

		};

		PMREMGenerator.prototype._textureToCubeUV = function _textureToCubeUV ( texture, cubeUVRenderTarget ) {

			var renderer = this._renderer;

			if ( texture.isCubeTexture ) {

				if ( this._cubemapShader == null ) {

					this._cubemapShader = _getCubemapShader();

				}

			} else {

				if ( this._equirectShader == null ) {

					this._equirectShader = _getEquirectShader();

				}

			}

			var material = texture.isCubeTexture ? this._cubemapShader : this._equirectShader;
			var mesh = new Mesh( _lodPlanes[ 0 ], material );

			var uniforms = material.uniforms;

			uniforms[ 'envMap' ].value = texture;

			if ( ! texture.isCubeTexture ) {

				uniforms[ 'texelSize' ].value.set( 1.0 / texture.image.width, 1.0 / texture.image.height );

			}

			uniforms[ 'inputEncoding' ].value = ENCODINGS[ texture.encoding ];
			uniforms[ 'outputEncoding' ].value = ENCODINGS[ cubeUVRenderTarget.texture.encoding ];

			_setViewport( cubeUVRenderTarget, 0, 0, 3 * SIZE_MAX, 2 * SIZE_MAX );

			renderer.setRenderTarget( cubeUVRenderTarget );
			renderer.render( mesh, _flatCamera );

		};

		PMREMGenerator.prototype._applyPMREM = function _applyPMREM ( cubeUVRenderTarget ) {

			var renderer = this._renderer;
			var autoClear = renderer.autoClear;
			renderer.autoClear = false;

			for ( var i = 1; i < TOTAL_LODS; i ++ ) {

				var sigma = Math.sqrt( _sigmas[ i ] * _sigmas[ i ] - _sigmas[ i - 1 ] * _sigmas[ i - 1 ] );

				var poleAxis = _axisDirections[ ( i - 1 ) % _axisDirections.length ];

				this._blur( cubeUVRenderTarget, i - 1, i, sigma, poleAxis );

			}

			renderer.autoClear = autoClear;

		};

		/**
			 * This is a two-pass Gaussian blur for a cubemap. Normally this is done
			 * vertically and horizontally, but this breaks down on a cube. Here we apply
			 * the blur latitudinally (around the poles), and then longitudinally (towards
			 * the poles) to approximate the orthogonally-separable blur. It is least
			 * accurate at the poles, but still does a decent job.
			 */
		PMREMGenerator.prototype._blur = function _blur ( cubeUVRenderTarget, lodIn, lodOut, sigma, poleAxis ) {

			var pingPongRenderTarget = this._pingPongRenderTarget;

			this._halfBlur(
				cubeUVRenderTarget,
				pingPongRenderTarget,
				lodIn,
				lodOut,
				sigma,
				'latitudinal',
				poleAxis );

			this._halfBlur(
				pingPongRenderTarget,
				cubeUVRenderTarget,
				lodOut,
				lodOut,
				sigma,
				'longitudinal',
				poleAxis );

		};

		PMREMGenerator.prototype._halfBlur = function _halfBlur ( targetIn, targetOut, lodIn, lodOut, sigmaRadians, direction, poleAxis ) {

			var renderer = this._renderer;
			var blurMaterial = this._blurMaterial;

			if ( direction !== 'latitudinal' && direction !== 'longitudinal' ) {

				console.error(
					'blur direction must be either latitudinal or longitudinal!' );

			}

			// Number of standard deviations at which to cut off the discrete approximation.
			var STANDARD_DEVIATIONS = 3;

			var blurMesh = new Mesh( _lodPlanes[ lodOut ], blurMaterial );
			var blurUniforms = blurMaterial.uniforms;

			var pixels = _sizeLods[ lodIn ] - 1;
			var radiansPerPixel = isFinite( sigmaRadians ) ? Math.PI / ( 2 * pixels ) : 2 * Math.PI / ( 2 * MAX_SAMPLES - 1 );
			var sigmaPixels = sigmaRadians / radiansPerPixel;
			var samples = isFinite( sigmaRadians ) ? 1 + Math.floor( STANDARD_DEVIATIONS * sigmaPixels ) : MAX_SAMPLES;

			if ( samples > MAX_SAMPLES ) {

				console.warn( ("sigmaRadians, " + sigmaRadians + ", is too large and will clip, as it requested " + samples + " samples when the maximum is set to " + MAX_SAMPLES) );

			}

			var weights = [];
			var sum = 0;

			for ( var i = 0; i < MAX_SAMPLES; ++ i ) {

				var x$1 = i / sigmaPixels;
				var weight = Math.exp( - x$1 * x$1 / 2 );
				weights.push( weight );

				if ( i == 0 ) {

					sum += weight;

				} else if ( i < samples ) {

					sum += 2 * weight;

				}

			}

			for ( var i$1 = 0; i$1 < weights.length; i$1 ++ ) {

				weights[ i$1 ] = weights[ i$1 ] / sum;

			}

			blurUniforms[ 'envMap' ].value = targetIn.texture;
			blurUniforms[ 'samples' ].value = samples;
			blurUniforms[ 'weights' ].value = weights;
			blurUniforms[ 'latitudinal' ].value = direction === 'latitudinal';

			if ( poleAxis ) {

				blurUniforms[ 'poleAxis' ].value = poleAxis;

			}

			blurUniforms[ 'dTheta' ].value = radiansPerPixel;
			blurUniforms[ 'mipInt' ].value = LOD_MAX - lodIn;
			blurUniforms[ 'inputEncoding' ].value = ENCODINGS[ targetIn.texture.encoding ];
			blurUniforms[ 'outputEncoding' ].value = ENCODINGS[ targetIn.texture.encoding ];

			var outputSize = _sizeLods[ lodOut ];
			var x = 3 * Math.max( 0, SIZE_MAX - 2 * outputSize );
			var y = ( lodOut === 0 ? 0 : 2 * SIZE_MAX ) + 2 * outputSize * ( lodOut > LOD_MAX - LOD_MIN ? lodOut - LOD_MAX + LOD_MIN : 0 );

			_setViewport( targetOut, x, y, 3 * outputSize, 2 * outputSize );
			renderer.setRenderTarget( targetOut );
			renderer.render( blurMesh, _flatCamera );

		};

		function _isLDR( texture ) {

			if ( texture === undefined || texture.type !== UnsignedByteType ) { return false; }

			return texture.encoding === LinearEncoding || texture.encoding === sRGBEncoding || texture.encoding === GammaEncoding;

		}

		function _createPlanes() {

			var _lodPlanes = [];
			var _sizeLods = [];
			var _sigmas = [];

			var lod = LOD_MAX;

			for ( var i = 0; i < TOTAL_LODS; i ++ ) {

				var sizeLod = Math.pow( 2, lod );
				_sizeLods.push( sizeLod );
				var sigma = 1.0 / sizeLod;

				if ( i > LOD_MAX - LOD_MIN ) {

					sigma = EXTRA_LOD_SIGMA[ i - LOD_MAX + LOD_MIN - 1 ];

				} else if ( i == 0 ) {

					sigma = 0;

				}

				_sigmas.push( sigma );

				var texelSize = 1.0 / ( sizeLod - 1 );
				var min = - texelSize / 2;
				var max = 1 + texelSize / 2;
				var uv1 = [ min, min, max, min, max, max, min, min, max, max, min, max ];

				var cubeFaces = 6;
				var vertices = 6;
				var positionSize = 3;
				var uvSize = 2;
				var faceIndexSize = 1;

				var position = new Float32Array( positionSize * vertices * cubeFaces );
				var uv = new Float32Array( uvSize * vertices * cubeFaces );
				var faceIndex = new Float32Array( faceIndexSize * vertices * cubeFaces );

				for ( var face = 0; face < cubeFaces; face ++ ) {

					var x = ( face % 3 ) * 2 / 3 - 1;
					var y = face > 2 ? 0 : - 1;
					var coordinates = [
						x, y, 0,
						x + 2 / 3, y, 0,
						x + 2 / 3, y + 1, 0,
						x, y, 0,
						x + 2 / 3, y + 1, 0,
						x, y + 1, 0
					];
					position.set( coordinates, positionSize * vertices * face );
					uv.set( uv1, uvSize * vertices * face );
					var fill = [ face, face, face, face, face, face ];
					faceIndex.set( fill, faceIndexSize * vertices * face );

				}

				var planes = new BufferGeometry();
				planes.setAttribute( 'position', new BufferAttribute( position, positionSize ) );
				planes.setAttribute( 'uv', new BufferAttribute( uv, uvSize ) );
				planes.setAttribute( 'faceIndex', new BufferAttribute( faceIndex, faceIndexSize ) );
				_lodPlanes.push( planes );

				if ( lod > LOD_MIN ) {

					lod --;

				}

			}

			return { _lodPlanes: _lodPlanes, _sizeLods: _sizeLods, _sigmas: _sigmas };

		}

		function _createRenderTarget( params ) {

			var cubeUVRenderTarget = new WebGLRenderTarget( 3 * SIZE_MAX, 3 * SIZE_MAX, params );
			cubeUVRenderTarget.texture.mapping = CubeUVReflectionMapping;
			cubeUVRenderTarget.texture.name = 'PMREM.cubeUv';
			cubeUVRenderTarget.scissorTest = true;
			return cubeUVRenderTarget;

		}

		function _setViewport( target, x, y, width, height ) {

			target.viewport.set( x, y, width, height );
			target.scissor.set( x, y, width, height );

		}

		function _getBlurShader( maxSamples ) {

			var weights = new Float32Array( maxSamples );
			var poleAxis = new Vector3( 0, 1, 0 );
			var shaderMaterial = new RawShaderMaterial( {

				name: 'SphericalGaussianBlur',

				defines: { 'n': maxSamples },

				uniforms: {
					'envMap': { value: null },
					'samples': { value: 1 },
					'weights': { value: weights },
					'latitudinal': { value: false },
					'dTheta': { value: 0 },
					'mipInt': { value: 0 },
					'poleAxis': { value: poleAxis },
					'inputEncoding': { value: ENCODINGS[ LinearEncoding ] },
					'outputEncoding': { value: ENCODINGS[ LinearEncoding ] }
				},

				vertexShader: _getCommonVertexShader(),

				fragmentShader: /* glsl */("\n\n\t\t\tprecision mediump float;\n\t\t\tprecision mediump int;\n\n\t\t\tvarying vec3 vOutputDirection;\n\n\t\t\tuniform sampler2D envMap;\n\t\t\tuniform int samples;\n\t\t\tuniform float weights[ n ];\n\t\t\tuniform bool latitudinal;\n\t\t\tuniform float dTheta;\n\t\t\tuniform float mipInt;\n\t\t\tuniform vec3 poleAxis;\n\n\t\t\t" + (_getEncodings()) + "\n\n\t\t\t#define ENVMAP_TYPE_CUBE_UV\n\t\t\t#include <cube_uv_reflection_fragment>\n\n\t\t\tvec3 getSample( float theta, vec3 axis ) {\n\n\t\t\t\tfloat cosTheta = cos( theta );\n\t\t\t\t// Rodrigues' axis-angle rotation\n\t\t\t\tvec3 sampleDirection = vOutputDirection * cosTheta\n\t\t\t\t\t+ cross( axis, vOutputDirection ) * sin( theta )\n\t\t\t\t\t+ axis * dot( axis, vOutputDirection ) * ( 1.0 - cosTheta );\n\n\t\t\t\treturn bilinearCubeUV( envMap, sampleDirection, mipInt );\n\n\t\t\t}\n\n\t\t\tvoid main() {\n\n\t\t\t\tvec3 axis = latitudinal ? poleAxis : cross( poleAxis, vOutputDirection );\n\n\t\t\t\tif ( all( equal( axis, vec3( 0.0 ) ) ) ) {\n\n\t\t\t\t\taxis = vec3( vOutputDirection.z, 0.0, - vOutputDirection.x );\n\n\t\t\t\t}\n\n\t\t\t\taxis = normalize( axis );\n\n\t\t\t\tgl_FragColor = vec4( 0.0, 0.0, 0.0, 1.0 );\n\t\t\t\tgl_FragColor.rgb += weights[ 0 ] * getSample( 0.0, axis );\n\n\t\t\t\tfor ( int i = 1; i < n; i++ ) {\n\n\t\t\t\t\tif ( i >= samples ) {\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tfloat theta = dTheta * float( i );\n\t\t\t\t\tgl_FragColor.rgb += weights[ i ] * getSample( -1.0 * theta, axis );\n\t\t\t\t\tgl_FragColor.rgb += weights[ i ] * getSample( theta, axis );\n\n\t\t\t\t}\n\n\t\t\t\tgl_FragColor = linearToOutputTexel( gl_FragColor );\n\n\t\t\t}\n\t\t"),

				blending: NoBlending,
				depthTest: false,
				depthWrite: false

			} );

			return shaderMaterial;

		}

		function _getEquirectShader() {

			var texelSize = new Vector2( 1, 1 );
			var shaderMaterial = new RawShaderMaterial( {

				name: 'EquirectangularToCubeUV',

				uniforms: {
					'envMap': { value: null },
					'texelSize': { value: texelSize },
					'inputEncoding': { value: ENCODINGS[ LinearEncoding ] },
					'outputEncoding': { value: ENCODINGS[ LinearEncoding ] }
				},

				vertexShader: _getCommonVertexShader(),

				fragmentShader: /* glsl */("\n\n\t\t\tprecision mediump float;\n\t\t\tprecision mediump int;\n\n\t\t\tvarying vec3 vOutputDirection;\n\n\t\t\tuniform sampler2D envMap;\n\t\t\tuniform vec2 texelSize;\n\n\t\t\t" + (_getEncodings()) + "\n\n\t\t\t#include <common>\n\n\t\t\tvoid main() {\n\n\t\t\t\tgl_FragColor = vec4( 0.0, 0.0, 0.0, 1.0 );\n\n\t\t\t\tvec3 outputDirection = normalize( vOutputDirection );\n\t\t\t\tvec2 uv = equirectUv( outputDirection );\n\n\t\t\t\tvec2 f = fract( uv / texelSize - 0.5 );\n\t\t\t\tuv -= f * texelSize;\n\t\t\t\tvec3 tl = envMapTexelToLinear( texture2D ( envMap, uv ) ).rgb;\n\t\t\t\tuv.x += texelSize.x;\n\t\t\t\tvec3 tr = envMapTexelToLinear( texture2D ( envMap, uv ) ).rgb;\n\t\t\t\tuv.y += texelSize.y;\n\t\t\t\tvec3 br = envMapTexelToLinear( texture2D ( envMap, uv ) ).rgb;\n\t\t\t\tuv.x -= texelSize.x;\n\t\t\t\tvec3 bl = envMapTexelToLinear( texture2D ( envMap, uv ) ).rgb;\n\n\t\t\t\tvec3 tm = mix( tl, tr, f.x );\n\t\t\t\tvec3 bm = mix( bl, br, f.x );\n\t\t\t\tgl_FragColor.rgb = mix( tm, bm, f.y );\n\n\t\t\t\tgl_FragColor = linearToOutputTexel( gl_FragColor );\n\n\t\t\t}\n\t\t"),

				blending: NoBlending,
				depthTest: false,
				depthWrite: false

			} );

			return shaderMaterial;

		}

		function _getCubemapShader() {

			var shaderMaterial = new RawShaderMaterial( {

				name: 'CubemapToCubeUV',

				uniforms: {
					'envMap': { value: null },
					'inputEncoding': { value: ENCODINGS[ LinearEncoding ] },
					'outputEncoding': { value: ENCODINGS[ LinearEncoding ] }
				},

				vertexShader: _getCommonVertexShader(),

				fragmentShader: /* glsl */("\n\n\t\t\tprecision mediump float;\n\t\t\tprecision mediump int;\n\n\t\t\tvarying vec3 vOutputDirection;\n\n\t\t\tuniform samplerCube envMap;\n\n\t\t\t" + (_getEncodings()) + "\n\n\t\t\tvoid main() {\n\n\t\t\t\tgl_FragColor = vec4( 0.0, 0.0, 0.0, 1.0 );\n\t\t\t\tgl_FragColor.rgb = envMapTexelToLinear( textureCube( envMap, vec3( - vOutputDirection.x, vOutputDirection.yz ) ) ).rgb;\n\t\t\t\tgl_FragColor = linearToOutputTexel( gl_FragColor );\n\n\t\t\t}\n\t\t"),

				blending: NoBlending,
				depthTest: false,
				depthWrite: false

			} );

			return shaderMaterial;

		}

		function _getCommonVertexShader() {

			return /* glsl */"\n\n\t\tprecision mediump float;\n\t\tprecision mediump int;\n\n\t\tattribute vec3 position;\n\t\tattribute vec2 uv;\n\t\tattribute float faceIndex;\n\n\t\tvarying vec3 vOutputDirection;\n\n\t\t// RH coordinate system; PMREM face-indexing convention\n\t\tvec3 getDirection( vec2 uv, float face ) {\n\n\t\t\tuv = 2.0 * uv - 1.0;\n\n\t\t\tvec3 direction = vec3( uv, 1.0 );\n\n\t\t\tif ( face == 0.0 ) {\n\n\t\t\t\tdirection = direction.zyx; // ( 1, v, u ) pos x\n\n\t\t\t} else if ( face == 1.0 ) {\n\n\t\t\t\tdirection = direction.xzy;\n\t\t\t\tdirection.xz *= -1.0; // ( -u, 1, -v ) pos y\n\n\t\t\t} else if ( face == 2.0 ) {\n\n\t\t\t\tdirection.x *= -1.0; // ( -u, v, 1 ) pos z\n\n\t\t\t} else if ( face == 3.0 ) {\n\n\t\t\t\tdirection = direction.zyx;\n\t\t\t\tdirection.xz *= -1.0; // ( -1, v, -u ) neg x\n\n\t\t\t} else if ( face == 4.0 ) {\n\n\t\t\t\tdirection = direction.xzy;\n\t\t\t\tdirection.xy *= -1.0; // ( -u, -1, v ) neg y\n\n\t\t\t} else if ( face == 5.0 ) {\n\n\t\t\t\tdirection.z *= -1.0; // ( u, v, -1 ) neg z\n\n\t\t\t}\n\n\t\t\treturn direction;\n\n\t\t}\n\n\t\tvoid main() {\n\n\t\t\tvOutputDirection = getDirection( uv, faceIndex );\n\t\t\tgl_Position = vec4( position, 1.0 );\n\n\t\t}\n\t";

		}

		function _getEncodings() {

			return /* glsl */"\n\n\t\tuniform int inputEncoding;\n\t\tuniform int outputEncoding;\n\n\t\t#include <encodings_pars_fragment>\n\n\t\tvec4 inputTexelToLinear( vec4 value ) {\n\n\t\t\tif ( inputEncoding == 0 ) {\n\n\t\t\t\treturn value;\n\n\t\t\t} else if ( inputEncoding == 1 ) {\n\n\t\t\t\treturn sRGBToLinear( value );\n\n\t\t\t} else if ( inputEncoding == 2 ) {\n\n\t\t\t\treturn RGBEToLinear( value );\n\n\t\t\t} else if ( inputEncoding == 3 ) {\n\n\t\t\t\treturn RGBMToLinear( value, 7.0 );\n\n\t\t\t} else if ( inputEncoding == 4 ) {\n\n\t\t\t\treturn RGBMToLinear( value, 16.0 );\n\n\t\t\t} else if ( inputEncoding == 5 ) {\n\n\t\t\t\treturn RGBDToLinear( value, 256.0 );\n\n\t\t\t} else {\n\n\t\t\t\treturn GammaToLinear( value, 2.2 );\n\n\t\t\t}\n\n\t\t}\n\n\t\tvec4 linearToOutputTexel( vec4 value ) {\n\n\t\t\tif ( outputEncoding == 0 ) {\n\n\t\t\t\treturn value;\n\n\t\t\t} else if ( outputEncoding == 1 ) {\n\n\t\t\t\treturn LinearTosRGB( value );\n\n\t\t\t} else if ( outputEncoding == 2 ) {\n\n\t\t\t\treturn LinearToRGBE( value );\n\n\t\t\t} else if ( outputEncoding == 3 ) {\n\n\t\t\t\treturn LinearToRGBM( value, 7.0 );\n\n\t\t\t} else if ( outputEncoding == 4 ) {\n\n\t\t\t\treturn LinearToRGBM( value, 16.0 );\n\n\t\t\t} else if ( outputEncoding == 5 ) {\n\n\t\t\t\treturn LinearToRGBD( value, 256.0 );\n\n\t\t\t} else {\n\n\t\t\t\treturn LinearToGamma( value, 2.2 );\n\n\t\t\t}\n\n\t\t}\n\n\t\tvec4 envMapTexelToLinear( vec4 color ) {\n\n\t\t\treturn inputTexelToLinear( color );\n\n\t\t}\n\t";

		}

		function Face4( a, b, c, d, normal, color, materialIndex ) {

			console.warn( 'THREE.Face4 has been removed. A THREE.Face3 will be created instead.' );
			return new Face3( a, b, c, normal, color, materialIndex );

		}

		var LineStrip = 0;
		var LinePieces = 1;
		var NoColors = 0;
		var FaceColors = 1;
		var VertexColors = 2;

		function MeshFaceMaterial( materials ) {

			console.warn( 'THREE.MeshFaceMaterial has been removed. Use an Array instead.' );
			return materials;

		}

		function MultiMaterial( materials ) {

			if ( materials === undefined ) { materials = []; }

			console.warn( 'THREE.MultiMaterial has been removed. Use an Array instead.' );
			materials.isMultiMaterial = true;
			materials.materials = materials;
			materials.clone = function () {

				return materials.slice();

			};

			return materials;

		}

		function PointCloud( geometry, material ) {

			console.warn( 'THREE.PointCloud has been renamed to THREE.Points.' );
			return new Points( geometry, material );

		}

		function Particle( material ) {

			console.warn( 'THREE.Particle has been renamed to THREE.Sprite.' );
			return new Sprite( material );

		}

		function ParticleSystem( geometry, material ) {

			console.warn( 'THREE.ParticleSystem has been renamed to THREE.Points.' );
			return new Points( geometry, material );

		}

		function PointCloudMaterial( parameters ) {

			console.warn( 'THREE.PointCloudMaterial has been renamed to THREE.PointsMaterial.' );
			return new PointsMaterial( parameters );

		}

		function ParticleBasicMaterial( parameters ) {

			console.warn( 'THREE.ParticleBasicMaterial has been renamed to THREE.PointsMaterial.' );
			return new PointsMaterial( parameters );

		}

		function ParticleSystemMaterial( parameters ) {

			console.warn( 'THREE.ParticleSystemMaterial has been renamed to THREE.PointsMaterial.' );
			return new PointsMaterial( parameters );

		}

		function Vertex( x, y, z ) {

			console.warn( 'THREE.Vertex has been removed. Use THREE.Vector3 instead.' );
			return new Vector3( x, y, z );

		}

		//

		function DynamicBufferAttribute( array, itemSize ) {

			console.warn( 'THREE.DynamicBufferAttribute has been removed. Use new THREE.BufferAttribute().setUsage( THREE.DynamicDrawUsage ) instead.' );
			return new BufferAttribute( array, itemSize ).setUsage( DynamicDrawUsage );

		}

		function Int8Attribute( array, itemSize ) {

			console.warn( 'THREE.Int8Attribute has been removed. Use new THREE.Int8BufferAttribute() instead.' );
			return new Int8BufferAttribute( array, itemSize );

		}

		function Uint8Attribute( array, itemSize ) {

			console.warn( 'THREE.Uint8Attribute has been removed. Use new THREE.Uint8BufferAttribute() instead.' );
			return new Uint8BufferAttribute( array, itemSize );

		}

		function Uint8ClampedAttribute( array, itemSize ) {

			console.warn( 'THREE.Uint8ClampedAttribute has been removed. Use new THREE.Uint8ClampedBufferAttribute() instead.' );
			return new Uint8ClampedBufferAttribute( array, itemSize );

		}

		function Int16Attribute( array, itemSize ) {

			console.warn( 'THREE.Int16Attribute has been removed. Use new THREE.Int16BufferAttribute() instead.' );
			return new Int16BufferAttribute( array, itemSize );

		}

		function Uint16Attribute( array, itemSize ) {

			console.warn( 'THREE.Uint16Attribute has been removed. Use new THREE.Uint16BufferAttribute() instead.' );
			return new Uint16BufferAttribute( array, itemSize );

		}

		function Int32Attribute( array, itemSize ) {

			console.warn( 'THREE.Int32Attribute has been removed. Use new THREE.Int32BufferAttribute() instead.' );
			return new Int32BufferAttribute( array, itemSize );

		}

		function Uint32Attribute( array, itemSize ) {

			console.warn( 'THREE.Uint32Attribute has been removed. Use new THREE.Uint32BufferAttribute() instead.' );
			return new Uint32BufferAttribute( array, itemSize );

		}

		function Float32Attribute( array, itemSize ) {

			console.warn( 'THREE.Float32Attribute has been removed. Use new THREE.Float32BufferAttribute() instead.' );
			return new Float32BufferAttribute( array, itemSize );

		}

		function Float64Attribute( array, itemSize ) {

			console.warn( 'THREE.Float64Attribute has been removed. Use new THREE.Float64BufferAttribute() instead.' );
			return new Float64BufferAttribute( array, itemSize );

		}

		//

		Curve.create = function ( construct, getPoint ) {

			console.log( 'THREE.Curve.create() has been deprecated' );

			construct.prototype = Object.create( Curve.prototype );
			construct.prototype.constructor = construct;
			construct.prototype.getPoint = getPoint;

			return construct;

		};

		//

		Object.assign( CurvePath.prototype, {

			createPointsGeometry: function ( divisions ) {

				console.warn( 'THREE.CurvePath: .createPointsGeometry() has been removed. Use new THREE.Geometry().setFromPoints( points ) instead.' );

				// generate geometry from path points (for Line or Points objects)

				var pts = this.getPoints( divisions );
				return this.createGeometry( pts );

			},

			createSpacedPointsGeometry: function ( divisions ) {

				console.warn( 'THREE.CurvePath: .createSpacedPointsGeometry() has been removed. Use new THREE.Geometry().setFromPoints( points ) instead.' );

				// generate geometry from equidistant sampling along the path

				var pts = this.getSpacedPoints( divisions );
				return this.createGeometry( pts );

			},

			createGeometry: function ( points ) {

				console.warn( 'THREE.CurvePath: .createGeometry() has been removed. Use new THREE.Geometry().setFromPoints( points ) instead.' );

				var geometry = new Geometry();

				for ( var i = 0, l = points.length; i < l; i ++ ) {

					var point = points[ i ];
					geometry.vertices.push( new Vector3( point.x, point.y, point.z || 0 ) );

				}

				return geometry;

			}

		} );

		//

		Object.assign( Path.prototype, {

			fromPoints: function ( points ) {

				console.warn( 'THREE.Path: .fromPoints() has been renamed to .setFromPoints().' );
				return this.setFromPoints( points );

			}

		} );

		//

		function ClosedSplineCurve3( points ) {

			console.warn( 'THREE.ClosedSplineCurve3 has been deprecated. Use THREE.CatmullRomCurve3 instead.' );

			CatmullRomCurve3.call( this, points );
			this.type = 'catmullrom';
			this.closed = true;

		}

		ClosedSplineCurve3.prototype = Object.create( CatmullRomCurve3.prototype );

		//

		function SplineCurve3( points ) {

			console.warn( 'THREE.SplineCurve3 has been deprecated. Use THREE.CatmullRomCurve3 instead.' );

			CatmullRomCurve3.call( this, points );
			this.type = 'catmullrom';

		}

		SplineCurve3.prototype = Object.create( CatmullRomCurve3.prototype );

		//

		function Spline( points ) {

			console.warn( 'THREE.Spline has been removed. Use THREE.CatmullRomCurve3 instead.' );

			CatmullRomCurve3.call( this, points );
			this.type = 'catmullrom';

		}

		Spline.prototype = Object.create( CatmullRomCurve3.prototype );

		Object.assign( Spline.prototype, {

			initFromArray: function ( /* a */ ) {

				console.error( 'THREE.Spline: .initFromArray() has been removed.' );

			},
			getControlPointsArray: function ( /* optionalTarget */ ) {

				console.error( 'THREE.Spline: .getControlPointsArray() has been removed.' );

			},
			reparametrizeByArcLength: function ( /* samplingCoef */ ) {

				console.error( 'THREE.Spline: .reparametrizeByArcLength() has been removed.' );

			}

		} );

		//

		function AxisHelper( size ) {

			console.warn( 'THREE.AxisHelper has been renamed to THREE.AxesHelper.' );
			return new AxesHelper( size );

		}

		function BoundingBoxHelper( object, color ) {

			console.warn( 'THREE.BoundingBoxHelper has been deprecated. Creating a THREE.BoxHelper instead.' );
			return new BoxHelper( object, color );

		}

		function EdgesHelper( object, hex ) {

			console.warn( 'THREE.EdgesHelper has been removed. Use THREE.EdgesGeometry instead.' );
			return new LineSegments( new EdgesGeometry( object.geometry ), new LineBasicMaterial( { color: hex !== undefined ? hex : 0xffffff } ) );

		}

		GridHelper.prototype.setColors = function () {

			console.error( 'THREE.GridHelper: setColors() has been deprecated, pass them in the constructor instead.' );

		};

		SkeletonHelper.prototype.update = function () {

			console.error( 'THREE.SkeletonHelper: update() no longer needs to be called.' );

		};

		function WireframeHelper( object, hex ) {

			console.warn( 'THREE.WireframeHelper has been removed. Use THREE.WireframeGeometry instead.' );
			return new LineSegments( new WireframeGeometry( object.geometry ), new LineBasicMaterial( { color: hex !== undefined ? hex : 0xffffff } ) );

		}

		//

		Object.assign( Loader.prototype, {

			extractUrlBase: function ( url ) {

				console.warn( 'THREE.Loader: .extractUrlBase() has been deprecated. Use THREE.LoaderUtils.extractUrlBase() instead.' );
				return LoaderUtils.extractUrlBase( url );

			}

		} );

		Loader.Handlers = {

			add: function ( /* regex, loader */ ) {

				console.error( 'THREE.Loader: Handlers.add() has been removed. Use LoadingManager.addHandler() instead.' );

			},

			get: function ( /* file */ ) {

				console.error( 'THREE.Loader: Handlers.get() has been removed. Use LoadingManager.getHandler() instead.' );

			}

		};

		function XHRLoader( manager ) {

			console.warn( 'THREE.XHRLoader has been renamed to THREE.FileLoader.' );
			return new FileLoader( manager );

		}

		function BinaryTextureLoader( manager ) {

			console.warn( 'THREE.BinaryTextureLoader has been renamed to THREE.DataTextureLoader.' );
			return new DataTextureLoader( manager );

		}

		Object.assign( ObjectLoader.prototype, {

			setTexturePath: function ( value ) {

				console.warn( 'THREE.ObjectLoader: .setTexturePath() has been renamed to .setResourcePath().' );
				return this.setResourcePath( value );

			}

		} );

		//

		Object.assign( Box2.prototype, {

			center: function ( optionalTarget ) {

				console.warn( 'THREE.Box2: .center() has been renamed to .getCenter().' );
				return this.getCenter( optionalTarget );

			},
			empty: function () {

				console.warn( 'THREE.Box2: .empty() has been renamed to .isEmpty().' );
				return this.isEmpty();

			},
			isIntersectionBox: function ( box ) {

				console.warn( 'THREE.Box2: .isIntersectionBox() has been renamed to .intersectsBox().' );
				return this.intersectsBox( box );

			},
			size: function ( optionalTarget ) {

				console.warn( 'THREE.Box2: .size() has been renamed to .getSize().' );
				return this.getSize( optionalTarget );

			}
		} );

		Object.assign( Box3.prototype, {

			center: function ( optionalTarget ) {

				console.warn( 'THREE.Box3: .center() has been renamed to .getCenter().' );
				return this.getCenter( optionalTarget );

			},
			empty: function () {

				console.warn( 'THREE.Box3: .empty() has been renamed to .isEmpty().' );
				return this.isEmpty();

			},
			isIntersectionBox: function ( box ) {

				console.warn( 'THREE.Box3: .isIntersectionBox() has been renamed to .intersectsBox().' );
				return this.intersectsBox( box );

			},
			isIntersectionSphere: function ( sphere ) {

				console.warn( 'THREE.Box3: .isIntersectionSphere() has been renamed to .intersectsSphere().' );
				return this.intersectsSphere( sphere );

			},
			size: function ( optionalTarget ) {

				console.warn( 'THREE.Box3: .size() has been renamed to .getSize().' );
				return this.getSize( optionalTarget );

			}
		} );

		Object.assign( Sphere.prototype, {

			empty: function () {

				console.warn( 'THREE.Sphere: .empty() has been renamed to .isEmpty().' );
				return this.isEmpty();

			},

		} );

		Frustum.prototype.setFromMatrix = function ( m ) {

			console.warn( 'THREE.Frustum: .setFromMatrix() has been renamed to .setFromProjectionMatrix().' );
			return this.setFromProjectionMatrix( m );

		};

		Line3.prototype.center = function ( optionalTarget ) {

			console.warn( 'THREE.Line3: .center() has been renamed to .getCenter().' );
			return this.getCenter( optionalTarget );

		};

		Object.assign( MathUtils, {

			random16: function () {

				console.warn( 'THREE.Math: .random16() has been deprecated. Use Math.random() instead.' );
				return Math.random();

			},

			nearestPowerOfTwo: function ( value ) {

				console.warn( 'THREE.Math: .nearestPowerOfTwo() has been renamed to .floorPowerOfTwo().' );
				return MathUtils.floorPowerOfTwo( value );

			},

			nextPowerOfTwo: function ( value ) {

				console.warn( 'THREE.Math: .nextPowerOfTwo() has been renamed to .ceilPowerOfTwo().' );
				return MathUtils.ceilPowerOfTwo( value );

			}

		} );

		Object.assign( Matrix3.prototype, {

			flattenToArrayOffset: function ( array, offset ) {

				console.warn( "THREE.Matrix3: .flattenToArrayOffset() has been deprecated. Use .toArray() instead." );
				return this.toArray( array, offset );

			},
			multiplyVector3: function ( vector ) {

				console.warn( 'THREE.Matrix3: .multiplyVector3() has been removed. Use vector.applyMatrix3( matrix ) instead.' );
				return vector.applyMatrix3( this );

			},
			multiplyVector3Array: function ( /* a */ ) {

				console.error( 'THREE.Matrix3: .multiplyVector3Array() has been removed.' );

			},
			applyToBufferAttribute: function ( attribute ) {

				console.warn( 'THREE.Matrix3: .applyToBufferAttribute() has been removed. Use attribute.applyMatrix3( matrix ) instead.' );
				return attribute.applyMatrix3( this );

			},
			applyToVector3Array: function ( /* array, offset, length */ ) {

				console.error( 'THREE.Matrix3: .applyToVector3Array() has been removed.' );

			}

		} );

		Object.assign( Matrix4.prototype, {

			extractPosition: function ( m ) {

				console.warn( 'THREE.Matrix4: .extractPosition() has been renamed to .copyPosition().' );
				return this.copyPosition( m );

			},
			flattenToArrayOffset: function ( array, offset ) {

				console.warn( "THREE.Matrix4: .flattenToArrayOffset() has been deprecated. Use .toArray() instead." );
				return this.toArray( array, offset );

			},
			getPosition: function () {

				console.warn( 'THREE.Matrix4: .getPosition() has been removed. Use Vector3.setFromMatrixPosition( matrix ) instead.' );
				return new Vector3().setFromMatrixColumn( this, 3 );

			},
			setRotationFromQuaternion: function ( q ) {

				console.warn( 'THREE.Matrix4: .setRotationFromQuaternion() has been renamed to .makeRotationFromQuaternion().' );
				return this.makeRotationFromQuaternion( q );

			},
			multiplyToArray: function () {

				console.warn( 'THREE.Matrix4: .multiplyToArray() has been removed.' );

			},
			multiplyVector3: function ( vector ) {

				console.warn( 'THREE.Matrix4: .multiplyVector3() has been removed. Use vector.applyMatrix4( matrix ) instead.' );
				return vector.applyMatrix4( this );

			},
			multiplyVector4: function ( vector ) {

				console.warn( 'THREE.Matrix4: .multiplyVector4() has been removed. Use vector.applyMatrix4( matrix ) instead.' );
				return vector.applyMatrix4( this );

			},
			multiplyVector3Array: function ( /* a */ ) {

				console.error( 'THREE.Matrix4: .multiplyVector3Array() has been removed.' );

			},
			rotateAxis: function ( v ) {

				console.warn( 'THREE.Matrix4: .rotateAxis() has been removed. Use Vector3.transformDirection( matrix ) instead.' );
				v.transformDirection( this );

			},
			crossVector: function ( vector ) {

				console.warn( 'THREE.Matrix4: .crossVector() has been removed. Use vector.applyMatrix4( matrix ) instead.' );
				return vector.applyMatrix4( this );

			},
			translate: function () {

				console.error( 'THREE.Matrix4: .translate() has been removed.' );

			},
			rotateX: function () {

				console.error( 'THREE.Matrix4: .rotateX() has been removed.' );

			},
			rotateY: function () {

				console.error( 'THREE.Matrix4: .rotateY() has been removed.' );

			},
			rotateZ: function () {

				console.error( 'THREE.Matrix4: .rotateZ() has been removed.' );

			},
			rotateByAxis: function () {

				console.error( 'THREE.Matrix4: .rotateByAxis() has been removed.' );

			},
			applyToBufferAttribute: function ( attribute ) {

				console.warn( 'THREE.Matrix4: .applyToBufferAttribute() has been removed. Use attribute.applyMatrix4( matrix ) instead.' );
				return attribute.applyMatrix4( this );

			},
			applyToVector3Array: function ( /* array, offset, length */ ) {

				console.error( 'THREE.Matrix4: .applyToVector3Array() has been removed.' );

			},
			makeFrustum: function ( left, right, bottom, top, near, far ) {

				console.warn( 'THREE.Matrix4: .makeFrustum() has been removed. Use .makePerspective( left, right, top, bottom, near, far ) instead.' );
				return this.makePerspective( left, right, top, bottom, near, far );

			}

		} );

		Plane.prototype.isIntersectionLine = function ( line ) {

			console.warn( 'THREE.Plane: .isIntersectionLine() has been renamed to .intersectsLine().' );
			return this.intersectsLine( line );

		};

		Quaternion.prototype.multiplyVector3 = function ( vector ) {

			console.warn( 'THREE.Quaternion: .multiplyVector3() has been removed. Use is now vector.applyQuaternion( quaternion ) instead.' );
			return vector.applyQuaternion( this );

		};

		Object.assign( Ray.prototype, {

			isIntersectionBox: function ( box ) {

				console.warn( 'THREE.Ray: .isIntersectionBox() has been renamed to .intersectsBox().' );
				return this.intersectsBox( box );

			},
			isIntersectionPlane: function ( plane ) {

				console.warn( 'THREE.Ray: .isIntersectionPlane() has been renamed to .intersectsPlane().' );
				return this.intersectsPlane( plane );

			},
			isIntersectionSphere: function ( sphere ) {

				console.warn( 'THREE.Ray: .isIntersectionSphere() has been renamed to .intersectsSphere().' );
				return this.intersectsSphere( sphere );

			}

		} );

		Object.assign( Triangle.prototype, {

			area: function () {

				console.warn( 'THREE.Triangle: .area() has been renamed to .getArea().' );
				return this.getArea();

			},
			barycoordFromPoint: function ( point, target ) {

				console.warn( 'THREE.Triangle: .barycoordFromPoint() has been renamed to .getBarycoord().' );
				return this.getBarycoord( point, target );

			},
			midpoint: function ( target ) {

				console.warn( 'THREE.Triangle: .midpoint() has been renamed to .getMidpoint().' );
				return this.getMidpoint( target );

			},
			normal: function ( target ) {

				console.warn( 'THREE.Triangle: .normal() has been renamed to .getNormal().' );
				return this.getNormal( target );

			},
			plane: function ( target ) {

				console.warn( 'THREE.Triangle: .plane() has been renamed to .getPlane().' );
				return this.getPlane( target );

			}

		} );

		Object.assign( Triangle, {

			barycoordFromPoint: function ( point, a, b, c, target ) {

				console.warn( 'THREE.Triangle: .barycoordFromPoint() has been renamed to .getBarycoord().' );
				return Triangle.getBarycoord( point, a, b, c, target );

			},
			normal: function ( a, b, c, target ) {

				console.warn( 'THREE.Triangle: .normal() has been renamed to .getNormal().' );
				return Triangle.getNormal( a, b, c, target );

			}

		} );

		Object.assign( Shape.prototype, {

			extractAllPoints: function ( divisions ) {

				console.warn( 'THREE.Shape: .extractAllPoints() has been removed. Use .extractPoints() instead.' );
				return this.extractPoints( divisions );

			},
			extrude: function ( options ) {

				console.warn( 'THREE.Shape: .extrude() has been removed. Use ExtrudeGeometry() instead.' );
				return new ExtrudeGeometry( this, options );

			},
			makeGeometry: function ( options ) {

				console.warn( 'THREE.Shape: .makeGeometry() has been removed. Use ShapeGeometry() instead.' );
				return new ShapeGeometry( this, options );

			}

		} );

		Object.assign( Vector2.prototype, {

			fromAttribute: function ( attribute, index, offset ) {

				console.warn( 'THREE.Vector2: .fromAttribute() has been renamed to .fromBufferAttribute().' );
				return this.fromBufferAttribute( attribute, index, offset );

			},
			distanceToManhattan: function ( v ) {

				console.warn( 'THREE.Vector2: .distanceToManhattan() has been renamed to .manhattanDistanceTo().' );
				return this.manhattanDistanceTo( v );

			},
			lengthManhattan: function () {

				console.warn( 'THREE.Vector2: .lengthManhattan() has been renamed to .manhattanLength().' );
				return this.manhattanLength();

			}

		} );

		Object.assign( Vector3.prototype, {

			setEulerFromRotationMatrix: function () {

				console.error( 'THREE.Vector3: .setEulerFromRotationMatrix() has been removed. Use Euler.setFromRotationMatrix() instead.' );

			},
			setEulerFromQuaternion: function () {

				console.error( 'THREE.Vector3: .setEulerFromQuaternion() has been removed. Use Euler.setFromQuaternion() instead.' );

			},
			getPositionFromMatrix: function ( m ) {

				console.warn( 'THREE.Vector3: .getPositionFromMatrix() has been renamed to .setFromMatrixPosition().' );
				return this.setFromMatrixPosition( m );

			},
			getScaleFromMatrix: function ( m ) {

				console.warn( 'THREE.Vector3: .getScaleFromMatrix() has been renamed to .setFromMatrixScale().' );
				return this.setFromMatrixScale( m );

			},
			getColumnFromMatrix: function ( index, matrix ) {

				console.warn( 'THREE.Vector3: .getColumnFromMatrix() has been renamed to .setFromMatrixColumn().' );
				return this.setFromMatrixColumn( matrix, index );

			},
			applyProjection: function ( m ) {

				console.warn( 'THREE.Vector3: .applyProjection() has been removed. Use .applyMatrix4( m ) instead.' );
				return this.applyMatrix4( m );

			},
			fromAttribute: function ( attribute, index, offset ) {

				console.warn( 'THREE.Vector3: .fromAttribute() has been renamed to .fromBufferAttribute().' );
				return this.fromBufferAttribute( attribute, index, offset );

			},
			distanceToManhattan: function ( v ) {

				console.warn( 'THREE.Vector3: .distanceToManhattan() has been renamed to .manhattanDistanceTo().' );
				return this.manhattanDistanceTo( v );

			},
			lengthManhattan: function () {

				console.warn( 'THREE.Vector3: .lengthManhattan() has been renamed to .manhattanLength().' );
				return this.manhattanLength();

			}

		} );

		Object.assign( Vector4.prototype, {

			fromAttribute: function ( attribute, index, offset ) {

				console.warn( 'THREE.Vector4: .fromAttribute() has been renamed to .fromBufferAttribute().' );
				return this.fromBufferAttribute( attribute, index, offset );

			},
			lengthManhattan: function () {

				console.warn( 'THREE.Vector4: .lengthManhattan() has been renamed to .manhattanLength().' );
				return this.manhattanLength();

			}

		} );

		//

		Object.assign( Geometry.prototype, {

			computeTangents: function () {

				console.error( 'THREE.Geometry: .computeTangents() has been removed.' );

			},
			computeLineDistances: function () {

				console.error( 'THREE.Geometry: .computeLineDistances() has been removed. Use THREE.Line.computeLineDistances() instead.' );

			},
			applyMatrix: function ( matrix ) {

				console.warn( 'THREE.Geometry: .applyMatrix() has been renamed to .applyMatrix4().' );
				return this.applyMatrix4( matrix );

			}

		} );

		Object.assign( Object3D.prototype, {

			getChildByName: function ( name ) {

				console.warn( 'THREE.Object3D: .getChildByName() has been renamed to .getObjectByName().' );
				return this.getObjectByName( name );

			},
			renderDepth: function () {

				console.warn( 'THREE.Object3D: .renderDepth has been removed. Use .renderOrder, instead.' );

			},
			translate: function ( distance, axis ) {

				console.warn( 'THREE.Object3D: .translate() has been removed. Use .translateOnAxis( axis, distance ) instead.' );
				return this.translateOnAxis( axis, distance );

			},
			getWorldRotation: function () {

				console.error( 'THREE.Object3D: .getWorldRotation() has been removed. Use THREE.Object3D.getWorldQuaternion( target ) instead.' );

			},
			applyMatrix: function ( matrix ) {

				console.warn( 'THREE.Object3D: .applyMatrix() has been renamed to .applyMatrix4().' );
				return this.applyMatrix4( matrix );

			}

		} );

		Object.defineProperties( Object3D.prototype, {

			eulerOrder: {
				get: function () {

					console.warn( 'THREE.Object3D: .eulerOrder is now .rotation.order.' );
					return this.rotation.order;

				},
				set: function ( value ) {

					console.warn( 'THREE.Object3D: .eulerOrder is now .rotation.order.' );
					this.rotation.order = value;

				}
			},
			useQuaternion: {
				get: function () {

					console.warn( 'THREE.Object3D: .useQuaternion has been removed. The library now uses quaternions by default.' );

				},
				set: function () {

					console.warn( 'THREE.Object3D: .useQuaternion has been removed. The library now uses quaternions by default.' );

				}
			}

		} );

		Object.assign( Mesh.prototype, {

			setDrawMode: function () {

				console.error( 'THREE.Mesh: .setDrawMode() has been removed. The renderer now always assumes THREE.TrianglesDrawMode. Transform your geometry via BufferGeometryUtils.toTrianglesDrawMode() if necessary.' );

			},

		} );

		Object.defineProperties( Mesh.prototype, {

			drawMode: {
				get: function () {

					console.error( 'THREE.Mesh: .drawMode has been removed. The renderer now always assumes THREE.TrianglesDrawMode.' );
					return TrianglesDrawMode;

				},
				set: function () {

					console.error( 'THREE.Mesh: .drawMode has been removed. The renderer now always assumes THREE.TrianglesDrawMode. Transform your geometry via BufferGeometryUtils.toTrianglesDrawMode() if necessary.' );

				}
			}

		} );

		Object.defineProperties( LOD.prototype, {

			objects: {
				get: function () {

					console.warn( 'THREE.LOD: .objects has been renamed to .levels.' );
					return this.levels;

				}
			}

		} );

		Object.defineProperty( Skeleton.prototype, 'useVertexTexture', {

			get: function () {

				console.warn( 'THREE.Skeleton: useVertexTexture has been removed.' );

			},
			set: function () {

				console.warn( 'THREE.Skeleton: useVertexTexture has been removed.' );

			}

		} );

		SkinnedMesh.prototype.initBones = function () {

			console.error( 'THREE.SkinnedMesh: initBones() has been removed.' );

		};

		Object.defineProperty( Curve.prototype, '__arcLengthDivisions', {

			get: function () {

				console.warn( 'THREE.Curve: .__arcLengthDivisions is now .arcLengthDivisions.' );
				return this.arcLengthDivisions;

			},
			set: function ( value ) {

				console.warn( 'THREE.Curve: .__arcLengthDivisions is now .arcLengthDivisions.' );
				this.arcLengthDivisions = value;

			}

		} );

		//

		PerspectiveCamera.prototype.setLens = function ( focalLength, filmGauge ) {

			console.warn( "THREE.PerspectiveCamera.setLens is deprecated. " +
					"Use .setFocalLength and .filmGauge for a photographic setup." );

			if ( filmGauge !== undefined ) { this.filmGauge = filmGauge; }
			this.setFocalLength( focalLength );

		};

		//

		Object.defineProperties( Light.prototype, {
			onlyShadow: {
				set: function () {

					console.warn( 'THREE.Light: .onlyShadow has been removed.' );

				}
			},
			shadowCameraFov: {
				set: function ( value ) {

					console.warn( 'THREE.Light: .shadowCameraFov is now .shadow.camera.fov.' );
					this.shadow.camera.fov = value;

				}
			},
			shadowCameraLeft: {
				set: function ( value ) {

					console.warn( 'THREE.Light: .shadowCameraLeft is now .shadow.camera.left.' );
					this.shadow.camera.left = value;

				}
			},
			shadowCameraRight: {
				set: function ( value ) {

					console.warn( 'THREE.Light: .shadowCameraRight is now .shadow.camera.right.' );
					this.shadow.camera.right = value;

				}
			},
			shadowCameraTop: {
				set: function ( value ) {

					console.warn( 'THREE.Light: .shadowCameraTop is now .shadow.camera.top.' );
					this.shadow.camera.top = value;

				}
			},
			shadowCameraBottom: {
				set: function ( value ) {

					console.warn( 'THREE.Light: .shadowCameraBottom is now .shadow.camera.bottom.' );
					this.shadow.camera.bottom = value;

				}
			},
			shadowCameraNear: {
				set: function ( value ) {

					console.warn( 'THREE.Light: .shadowCameraNear is now .shadow.camera.near.' );
					this.shadow.camera.near = value;

				}
			},
			shadowCameraFar: {
				set: function ( value ) {

					console.warn( 'THREE.Light: .shadowCameraFar is now .shadow.camera.far.' );
					this.shadow.camera.far = value;

				}
			},
			shadowCameraVisible: {
				set: function () {

					console.warn( 'THREE.Light: .shadowCameraVisible has been removed. Use new THREE.CameraHelper( light.shadow.camera ) instead.' );

				}
			},
			shadowBias: {
				set: function ( value ) {

					console.warn( 'THREE.Light: .shadowBias is now .shadow.bias.' );
					this.shadow.bias = value;

				}
			},
			shadowDarkness: {
				set: function () {

					console.warn( 'THREE.Light: .shadowDarkness has been removed.' );

				}
			},
			shadowMapWidth: {
				set: function ( value ) {

					console.warn( 'THREE.Light: .shadowMapWidth is now .shadow.mapSize.width.' );
					this.shadow.mapSize.width = value;

				}
			},
			shadowMapHeight: {
				set: function ( value ) {

					console.warn( 'THREE.Light: .shadowMapHeight is now .shadow.mapSize.height.' );
					this.shadow.mapSize.height = value;

				}
			}
		} );

		//

		Object.defineProperties( BufferAttribute.prototype, {

			length: {
				get: function () {

					console.warn( 'THREE.BufferAttribute: .length has been deprecated. Use .count instead.' );
					return this.array.length;

				}
			},
			dynamic: {
				get: function () {

					console.warn( 'THREE.BufferAttribute: .dynamic has been deprecated. Use .usage instead.' );
					return this.usage === DynamicDrawUsage;

				},
				set: function ( /* value */ ) {

					console.warn( 'THREE.BufferAttribute: .dynamic has been deprecated. Use .usage instead.' );
					this.setUsage( DynamicDrawUsage );

				}
			}

		} );

		Object.assign( BufferAttribute.prototype, {
			setDynamic: function ( value ) {

				console.warn( 'THREE.BufferAttribute: .setDynamic() has been deprecated. Use .setUsage() instead.' );
				this.setUsage( value === true ? DynamicDrawUsage : StaticDrawUsage );
				return this;

			},
			copyIndicesArray: function ( /* indices */ ) {

				console.error( 'THREE.BufferAttribute: .copyIndicesArray() has been removed.' );

			},
			setArray: function ( /* array */ ) {

				console.error( 'THREE.BufferAttribute: .setArray has been removed. Use BufferGeometry .setAttribute to replace/resize attribute buffers' );

			}
		} );

		Object.assign( BufferGeometry.prototype, {

			addIndex: function ( index ) {

				console.warn( 'THREE.BufferGeometry: .addIndex() has been renamed to .setIndex().' );
				this.setIndex( index );

			},
			addAttribute: function ( name, attribute ) {

				console.warn( 'THREE.BufferGeometry: .addAttribute() has been renamed to .setAttribute().' );

				if ( ! ( attribute && attribute.isBufferAttribute ) && ! ( attribute && attribute.isInterleavedBufferAttribute ) ) {

					console.warn( 'THREE.BufferGeometry: .addAttribute() now expects ( name, attribute ).' );

					return this.setAttribute( name, new BufferAttribute( arguments[ 1 ], arguments[ 2 ] ) );

				}

				if ( name === 'index' ) {

					console.warn( 'THREE.BufferGeometry.addAttribute: Use .setIndex() for index attribute.' );
					this.setIndex( attribute );

					return this;

				}

				return this.setAttribute( name, attribute );

			},
			addDrawCall: function ( start, count, indexOffset ) {

				if ( indexOffset !== undefined ) {

					console.warn( 'THREE.BufferGeometry: .addDrawCall() no longer supports indexOffset.' );

				}

				console.warn( 'THREE.BufferGeometry: .addDrawCall() is now .addGroup().' );
				this.addGroup( start, count );

			},
			clearDrawCalls: function () {

				console.warn( 'THREE.BufferGeometry: .clearDrawCalls() is now .clearGroups().' );
				this.clearGroups();

			},
			computeTangents: function () {

				console.warn( 'THREE.BufferGeometry: .computeTangents() has been removed.' );

			},
			computeOffsets: function () {

				console.warn( 'THREE.BufferGeometry: .computeOffsets() has been removed.' );

			},
			removeAttribute: function ( name ) {

				console.warn( 'THREE.BufferGeometry: .removeAttribute() has been renamed to .deleteAttribute().' );

				return this.deleteAttribute( name );

			},
			applyMatrix: function ( matrix ) {

				console.warn( 'THREE.BufferGeometry: .applyMatrix() has been renamed to .applyMatrix4().' );
				return this.applyMatrix4( matrix );

			}

		} );

		Object.defineProperties( BufferGeometry.prototype, {

			drawcalls: {
				get: function () {

					console.error( 'THREE.BufferGeometry: .drawcalls has been renamed to .groups.' );
					return this.groups;

				}
			},
			offsets: {
				get: function () {

					console.warn( 'THREE.BufferGeometry: .offsets has been renamed to .groups.' );
					return this.groups;

				}
			}

		} );

		Object.defineProperties( InstancedBufferGeometry.prototype, {

			maxInstancedCount: {
				get: function () {

					console.warn( 'THREE.InstancedBufferGeometry: .maxInstancedCount has been renamed to .instanceCount.' );
					return this.instanceCount;

				},
				set: function ( value ) {

					console.warn( 'THREE.InstancedBufferGeometry: .maxInstancedCount has been renamed to .instanceCount.' );
					this.instanceCount = value;

				}
			}

		} );

		Object.defineProperties( Raycaster.prototype, {

			linePrecision: {
				get: function () {

					console.warn( 'THREE.Raycaster: .linePrecision has been deprecated. Use .params.Line.threshold instead.' );
					return this.params.Line.threshold;

				},
				set: function ( value ) {

					console.warn( 'THREE.Raycaster: .linePrecision has been deprecated. Use .params.Line.threshold instead.' );
					this.params.Line.threshold = value;

				}
			}

		} );

		Object.defineProperties( InterleavedBuffer.prototype, {

			dynamic: {
				get: function () {

					console.warn( 'THREE.InterleavedBuffer: .length has been deprecated. Use .usage instead.' );
					return this.usage === DynamicDrawUsage;

				},
				set: function ( value ) {

					console.warn( 'THREE.InterleavedBuffer: .length has been deprecated. Use .usage instead.' );
					this.setUsage( value );

				}
			}

		} );

		Object.assign( InterleavedBuffer.prototype, {
			setDynamic: function ( value ) {

				console.warn( 'THREE.InterleavedBuffer: .setDynamic() has been deprecated. Use .setUsage() instead.' );
				this.setUsage( value === true ? DynamicDrawUsage : StaticDrawUsage );
				return this;

			},
			setArray: function ( /* array */ ) {

				console.error( 'THREE.InterleavedBuffer: .setArray has been removed. Use BufferGeometry .setAttribute to replace/resize attribute buffers' );

			}
		} );

		//

		Object.assign( ExtrudeBufferGeometry.prototype, {

			getArrays: function () {

				console.error( 'THREE.ExtrudeBufferGeometry: .getArrays() has been removed.' );

			},

			addShapeList: function () {

				console.error( 'THREE.ExtrudeBufferGeometry: .addShapeList() has been removed.' );

			},

			addShape: function () {

				console.error( 'THREE.ExtrudeBufferGeometry: .addShape() has been removed.' );

			}

		} );

		//

		Object.assign( Scene.prototype, {

			dispose: function () {

				console.error( 'THREE.Scene: .dispose() has been removed.' );

			}

		} );

		//

		Object.defineProperties( Uniform.prototype, {

			dynamic: {
				set: function () {

					console.warn( 'THREE.Uniform: .dynamic has been removed. Use object.onBeforeRender() instead.' );

				}
			},
			onUpdate: {
				value: function () {

					console.warn( 'THREE.Uniform: .onUpdate() has been removed. Use object.onBeforeRender() instead.' );
					return this;

				}
			}

		} );

		//

		Object.defineProperties( Material.prototype, {

			wrapAround: {
				get: function () {

					console.warn( 'THREE.Material: .wrapAround has been removed.' );

				},
				set: function () {

					console.warn( 'THREE.Material: .wrapAround has been removed.' );

				}
			},

			overdraw: {
				get: function () {

					console.warn( 'THREE.Material: .overdraw has been removed.' );

				},
				set: function () {

					console.warn( 'THREE.Material: .overdraw has been removed.' );

				}
			},

			wrapRGB: {
				get: function () {

					console.warn( 'THREE.Material: .wrapRGB has been removed.' );
					return new Color();

				}
			},

			shading: {
				get: function () {

					console.error( 'THREE.' + this.type + ': .shading has been removed. Use the boolean .flatShading instead.' );

				},
				set: function ( value ) {

					console.warn( 'THREE.' + this.type + ': .shading has been removed. Use the boolean .flatShading instead.' );
					this.flatShading = ( value === FlatShading );

				}
			},

			stencilMask: {
				get: function () {

					console.warn( 'THREE.' + this.type + ': .stencilMask has been removed. Use .stencilFuncMask instead.' );
					return this.stencilFuncMask;

				},
				set: function ( value ) {

					console.warn( 'THREE.' + this.type + ': .stencilMask has been removed. Use .stencilFuncMask instead.' );
					this.stencilFuncMask = value;

				}
			}

		} );

		Object.defineProperties( MeshPhongMaterial.prototype, {

			metal: {
				get: function () {

					console.warn( 'THREE.MeshPhongMaterial: .metal has been removed. Use THREE.MeshStandardMaterial instead.' );
					return false;

				},
				set: function () {

					console.warn( 'THREE.MeshPhongMaterial: .metal has been removed. Use THREE.MeshStandardMaterial instead' );

				}
			}

		} );

		Object.defineProperties( MeshPhysicalMaterial.prototype, {

			transparency: {
				get: function () {

					console.warn( 'THREE.MeshPhysicalMaterial: .transparency has been renamed to .transmission.' );
					return this.transmission;

				},
				set: function ( value ) {

					console.warn( 'THREE.MeshPhysicalMaterial: .transparency has been renamed to .transmission.' );
					this.transmission = value;

				}
			}

		} );

		Object.defineProperties( ShaderMaterial.prototype, {

			derivatives: {
				get: function () {

					console.warn( 'THREE.ShaderMaterial: .derivatives has been moved to .extensions.derivatives.' );
					return this.extensions.derivatives;

				},
				set: function ( value ) {

					console.warn( 'THREE. ShaderMaterial: .derivatives has been moved to .extensions.derivatives.' );
					this.extensions.derivatives = value;

				}
			}

		} );

		//

		Object.assign( WebGLRenderer.prototype, {

			clearTarget: function ( renderTarget, color, depth, stencil ) {

				console.warn( 'THREE.WebGLRenderer: .clearTarget() has been deprecated. Use .setRenderTarget() and .clear() instead.' );
				this.setRenderTarget( renderTarget );
				this.clear( color, depth, stencil );

			},
			animate: function ( callback ) {

				console.warn( 'THREE.WebGLRenderer: .animate() is now .setAnimationLoop().' );
				this.setAnimationLoop( callback );

			},
			getCurrentRenderTarget: function () {

				console.warn( 'THREE.WebGLRenderer: .getCurrentRenderTarget() is now .getRenderTarget().' );
				return this.getRenderTarget();

			},
			getMaxAnisotropy: function () {

				console.warn( 'THREE.WebGLRenderer: .getMaxAnisotropy() is now .capabilities.getMaxAnisotropy().' );
				return this.capabilities.getMaxAnisotropy();

			},
			getPrecision: function () {

				console.warn( 'THREE.WebGLRenderer: .getPrecision() is now .capabilities.precision.' );
				return this.capabilities.precision;

			},
			resetGLState: function () {

				console.warn( 'THREE.WebGLRenderer: .resetGLState() is now .state.reset().' );
				return this.state.reset();

			},
			supportsFloatTextures: function () {

				console.warn( 'THREE.WebGLRenderer: .supportsFloatTextures() is now .extensions.get( \'OES_texture_float\' ).' );
				return this.extensions.get( 'OES_texture_float' );

			},
			supportsHalfFloatTextures: function () {

				console.warn( 'THREE.WebGLRenderer: .supportsHalfFloatTextures() is now .extensions.get( \'OES_texture_half_float\' ).' );
				return this.extensions.get( 'OES_texture_half_float' );

			},
			supportsStandardDerivatives: function () {

				console.warn( 'THREE.WebGLRenderer: .supportsStandardDerivatives() is now .extensions.get( \'OES_standard_derivatives\' ).' );
				return this.extensions.get( 'OES_standard_derivatives' );

			},
			supportsCompressedTextureS3TC: function () {

				console.warn( 'THREE.WebGLRenderer: .supportsCompressedTextureS3TC() is now .extensions.get( \'WEBGL_compressed_texture_s3tc\' ).' );
				return this.extensions.get( 'WEBGL_compressed_texture_s3tc' );

			},
			supportsCompressedTexturePVRTC: function () {

				console.warn( 'THREE.WebGLRenderer: .supportsCompressedTexturePVRTC() is now .extensions.get( \'WEBGL_compressed_texture_pvrtc\' ).' );
				return this.extensions.get( 'WEBGL_compressed_texture_pvrtc' );

			},
			supportsBlendMinMax: function () {

				console.warn( 'THREE.WebGLRenderer: .supportsBlendMinMax() is now .extensions.get( \'EXT_blend_minmax\' ).' );
				return this.extensions.get( 'EXT_blend_minmax' );

			},
			supportsVertexTextures: function () {

				console.warn( 'THREE.WebGLRenderer: .supportsVertexTextures() is now .capabilities.vertexTextures.' );
				return this.capabilities.vertexTextures;

			},
			supportsInstancedArrays: function () {

				console.warn( 'THREE.WebGLRenderer: .supportsInstancedArrays() is now .extensions.get( \'ANGLE_instanced_arrays\' ).' );
				return this.extensions.get( 'ANGLE_instanced_arrays' );

			},
			enableScissorTest: function ( boolean ) {

				console.warn( 'THREE.WebGLRenderer: .enableScissorTest() is now .setScissorTest().' );
				this.setScissorTest( boolean );

			},
			initMaterial: function () {

				console.warn( 'THREE.WebGLRenderer: .initMaterial() has been removed.' );

			},
			addPrePlugin: function () {

				console.warn( 'THREE.WebGLRenderer: .addPrePlugin() has been removed.' );

			},
			addPostPlugin: function () {

				console.warn( 'THREE.WebGLRenderer: .addPostPlugin() has been removed.' );

			},
			updateShadowMap: function () {

				console.warn( 'THREE.WebGLRenderer: .updateShadowMap() has been removed.' );

			},
			setFaceCulling: function () {

				console.warn( 'THREE.WebGLRenderer: .setFaceCulling() has been removed.' );

			},
			allocTextureUnit: function () {

				console.warn( 'THREE.WebGLRenderer: .allocTextureUnit() has been removed.' );

			},
			setTexture: function () {

				console.warn( 'THREE.WebGLRenderer: .setTexture() has been removed.' );

			},
			setTexture2D: function () {

				console.warn( 'THREE.WebGLRenderer: .setTexture2D() has been removed.' );

			},
			setTextureCube: function () {

				console.warn( 'THREE.WebGLRenderer: .setTextureCube() has been removed.' );

			},
			getActiveMipMapLevel: function () {

				console.warn( 'THREE.WebGLRenderer: .getActiveMipMapLevel() is now .getActiveMipmapLevel().' );
				return this.getActiveMipmapLevel();

			}

		} );

		Object.defineProperties( WebGLRenderer.prototype, {

			shadowMapEnabled: {
				get: function () {

					return this.shadowMap.enabled;

				},
				set: function ( value ) {

					console.warn( 'THREE.WebGLRenderer: .shadowMapEnabled is now .shadowMap.enabled.' );
					this.shadowMap.enabled = value;

				}
			},
			shadowMapType: {
				get: function () {

					return this.shadowMap.type;

				},
				set: function ( value ) {

					console.warn( 'THREE.WebGLRenderer: .shadowMapType is now .shadowMap.type.' );
					this.shadowMap.type = value;

				}
			},
			shadowMapCullFace: {
				get: function () {

					console.warn( 'THREE.WebGLRenderer: .shadowMapCullFace has been removed. Set Material.shadowSide instead.' );
					return undefined;

				},
				set: function ( /* value */ ) {

					console.warn( 'THREE.WebGLRenderer: .shadowMapCullFace has been removed. Set Material.shadowSide instead.' );

				}
			},
			context: {
				get: function () {

					console.warn( 'THREE.WebGLRenderer: .context has been removed. Use .getContext() instead.' );
					return this.getContext();

				}
			},
			vr: {
				get: function () {

					console.warn( 'THREE.WebGLRenderer: .vr has been renamed to .xr' );
					return this.xr;

				}
			},
			gammaInput: {
				get: function () {

					console.warn( 'THREE.WebGLRenderer: .gammaInput has been removed. Set the encoding for textures via Texture.encoding instead.' );
					return false;

				},
				set: function () {

					console.warn( 'THREE.WebGLRenderer: .gammaInput has been removed. Set the encoding for textures via Texture.encoding instead.' );

				}
			},
			gammaOutput: {
				get: function () {

					console.warn( 'THREE.WebGLRenderer: .gammaOutput has been removed. Set WebGLRenderer.outputEncoding instead.' );
					return false;

				},
				set: function ( value ) {

					console.warn( 'THREE.WebGLRenderer: .gammaOutput has been removed. Set WebGLRenderer.outputEncoding instead.' );
					this.outputEncoding = ( value === true ) ? sRGBEncoding : LinearEncoding;

				}
			},
			toneMappingWhitePoint: {
				get: function () {

					console.warn( 'THREE.WebGLRenderer: .toneMappingWhitePoint has been removed.' );
					return 1.0;

				},
				set: function () {

					console.warn( 'THREE.WebGLRenderer: .toneMappingWhitePoint has been removed.' );

				}
			},

		} );

		Object.defineProperties( WebGLShadowMap.prototype, {

			cullFace: {
				get: function () {

					console.warn( 'THREE.WebGLRenderer: .shadowMap.cullFace has been removed. Set Material.shadowSide instead.' );
					return undefined;

				},
				set: function ( /* cullFace */ ) {

					console.warn( 'THREE.WebGLRenderer: .shadowMap.cullFace has been removed. Set Material.shadowSide instead.' );

				}
			},
			renderReverseSided: {
				get: function () {

					console.warn( 'THREE.WebGLRenderer: .shadowMap.renderReverseSided has been removed. Set Material.shadowSide instead.' );
					return undefined;

				},
				set: function () {

					console.warn( 'THREE.WebGLRenderer: .shadowMap.renderReverseSided has been removed. Set Material.shadowSide instead.' );

				}
			},
			renderSingleSided: {
				get: function () {

					console.warn( 'THREE.WebGLRenderer: .shadowMap.renderSingleSided has been removed. Set Material.shadowSide instead.' );
					return undefined;

				},
				set: function () {

					console.warn( 'THREE.WebGLRenderer: .shadowMap.renderSingleSided has been removed. Set Material.shadowSide instead.' );

				}
			}

		} );

		function WebGLRenderTargetCube( width, height, options ) {

			console.warn( 'THREE.WebGLRenderTargetCube( width, height, options ) is now WebGLCubeRenderTarget( size, options ).' );
			return new WebGLCubeRenderTarget( width, options );

		}

		//

		Object.defineProperties( WebGLRenderTarget.prototype, {

			wrapS: {
				get: function () {

					console.warn( 'THREE.WebGLRenderTarget: .wrapS is now .texture.wrapS.' );
					return this.texture.wrapS;

				},
				set: function ( value ) {

					console.warn( 'THREE.WebGLRenderTarget: .wrapS is now .texture.wrapS.' );
					this.texture.wrapS = value;

				}
			},
			wrapT: {
				get: function () {

					console.warn( 'THREE.WebGLRenderTarget: .wrapT is now .texture.wrapT.' );
					return this.texture.wrapT;

				},
				set: function ( value ) {

					console.warn( 'THREE.WebGLRenderTarget: .wrapT is now .texture.wrapT.' );
					this.texture.wrapT = value;

				}
			},
			magFilter: {
				get: function () {

					console.warn( 'THREE.WebGLRenderTarget: .magFilter is now .texture.magFilter.' );
					return this.texture.magFilter;

				},
				set: function ( value ) {

					console.warn( 'THREE.WebGLRenderTarget: .magFilter is now .texture.magFilter.' );
					this.texture.magFilter = value;

				}
			},
			minFilter: {
				get: function () {

					console.warn( 'THREE.WebGLRenderTarget: .minFilter is now .texture.minFilter.' );
					return this.texture.minFilter;

				},
				set: function ( value ) {

					console.warn( 'THREE.WebGLRenderTarget: .minFilter is now .texture.minFilter.' );
					this.texture.minFilter = value;

				}
			},
			anisotropy: {
				get: function () {

					console.warn( 'THREE.WebGLRenderTarget: .anisotropy is now .texture.anisotropy.' );
					return this.texture.anisotropy;

				},
				set: function ( value ) {

					console.warn( 'THREE.WebGLRenderTarget: .anisotropy is now .texture.anisotropy.' );
					this.texture.anisotropy = value;

				}
			},
			offset: {
				get: function () {

					console.warn( 'THREE.WebGLRenderTarget: .offset is now .texture.offset.' );
					return this.texture.offset;

				},
				set: function ( value ) {

					console.warn( 'THREE.WebGLRenderTarget: .offset is now .texture.offset.' );
					this.texture.offset = value;

				}
			},
			repeat: {
				get: function () {

					console.warn( 'THREE.WebGLRenderTarget: .repeat is now .texture.repeat.' );
					return this.texture.repeat;

				},
				set: function ( value ) {

					console.warn( 'THREE.WebGLRenderTarget: .repeat is now .texture.repeat.' );
					this.texture.repeat = value;

				}
			},
			format: {
				get: function () {

					console.warn( 'THREE.WebGLRenderTarget: .format is now .texture.format.' );
					return this.texture.format;

				},
				set: function ( value ) {

					console.warn( 'THREE.WebGLRenderTarget: .format is now .texture.format.' );
					this.texture.format = value;

				}
			},
			type: {
				get: function () {

					console.warn( 'THREE.WebGLRenderTarget: .type is now .texture.type.' );
					return this.texture.type;

				},
				set: function ( value ) {

					console.warn( 'THREE.WebGLRenderTarget: .type is now .texture.type.' );
					this.texture.type = value;

				}
			},
			generateMipmaps: {
				get: function () {

					console.warn( 'THREE.WebGLRenderTarget: .generateMipmaps is now .texture.generateMipmaps.' );
					return this.texture.generateMipmaps;

				},
				set: function ( value ) {

					console.warn( 'THREE.WebGLRenderTarget: .generateMipmaps is now .texture.generateMipmaps.' );
					this.texture.generateMipmaps = value;

				}
			}

		} );

		//

		Object.defineProperties( Audio.prototype, {

			load: {
				value: function ( file ) {

					console.warn( 'THREE.Audio: .load has been deprecated. Use THREE.AudioLoader instead.' );
					var scope = this;
					var audioLoader = new AudioLoader();
					audioLoader.load( file, function ( buffer ) {

						scope.setBuffer( buffer );

					} );
					return this;

				}
			},
			startTime: {
				set: function () {

					console.warn( 'THREE.Audio: .startTime is now .play( delay ).' );

				}
			}

		} );

		AudioAnalyser.prototype.getData = function () {

			console.warn( 'THREE.AudioAnalyser: .getData() is now .getFrequencyData().' );
			return this.getFrequencyData();

		};

		//

		CubeCamera.prototype.updateCubeMap = function ( renderer, scene ) {

			console.warn( 'THREE.CubeCamera: .updateCubeMap() is now .update().' );
			return this.update( renderer, scene );

		};

		//

		var GeometryUtils = {

			merge: function ( geometry1, geometry2, materialIndexOffset ) {

				console.warn( 'THREE.GeometryUtils: .merge() has been moved to Geometry. Use geometry.merge( geometry2, matrix, materialIndexOffset ) instead.' );
				var matrix;

				if ( geometry2.isMesh ) {

					geometry2.matrixAutoUpdate && geometry2.updateMatrix();

					matrix = geometry2.matrix;
					geometry2 = geometry2.geometry;

				}

				geometry1.merge( geometry2, matrix, materialIndexOffset );

			},

			center: function ( geometry ) {

				console.warn( 'THREE.GeometryUtils: .center() has been moved to Geometry. Use geometry.center() instead.' );
				return geometry.center();

			}

		};

		ImageUtils.crossOrigin = undefined;

		ImageUtils.loadTexture = function ( url, mapping, onLoad, onError ) {

			console.warn( 'THREE.ImageUtils.loadTexture has been deprecated. Use THREE.TextureLoader() instead.' );

			var loader = new TextureLoader();
			loader.setCrossOrigin( this.crossOrigin );

			var texture = loader.load( url, onLoad, undefined, onError );

			if ( mapping ) { texture.mapping = mapping; }

			return texture;

		};

		ImageUtils.loadTextureCube = function ( urls, mapping, onLoad, onError ) {

			console.warn( 'THREE.ImageUtils.loadTextureCube has been deprecated. Use THREE.CubeTextureLoader() instead.' );

			var loader = new CubeTextureLoader();
			loader.setCrossOrigin( this.crossOrigin );

			var texture = loader.load( urls, onLoad, undefined, onError );

			if ( mapping ) { texture.mapping = mapping; }

			return texture;

		};

		ImageUtils.loadCompressedTexture = function () {

			console.error( 'THREE.ImageUtils.loadCompressedTexture has been removed. Use THREE.DDSLoader instead.' );

		};

		ImageUtils.loadCompressedTextureCube = function () {

			console.error( 'THREE.ImageUtils.loadCompressedTextureCube has been removed. Use THREE.DDSLoader instead.' );

		};

		//

		function CanvasRenderer() {

			console.error( 'THREE.CanvasRenderer has been removed' );

		}

		//

		function JSONLoader() {

			console.error( 'THREE.JSONLoader has been removed.' );

		}

		//

		var SceneUtils = {

			createMultiMaterialObject: function ( /* geometry, materials */ ) {

				console.error( 'THREE.SceneUtils has been moved to /examples/jsm/utils/SceneUtils.js' );

			},

			detach: function ( /* child, parent, scene */ ) {

				console.error( 'THREE.SceneUtils has been moved to /examples/jsm/utils/SceneUtils.js' );

			},

			attach: function ( /* child, scene, parent */ ) {

				console.error( 'THREE.SceneUtils has been moved to /examples/jsm/utils/SceneUtils.js' );

			}

		};

		//

		function LensFlare() {

			console.error( 'THREE.LensFlare has been moved to /examples/jsm/objects/Lensflare.js' );

		}

		if ( typeof __THREE_DEVTOOLS__ !== 'undefined' ) {

			/* eslint-disable no-undef */
			__THREE_DEVTOOLS__.dispatchEvent( new CustomEvent( 'register', { detail: {
				revision: REVISION,
			} } ) );
			/* eslint-enable no-undef */

		}

		exports.ACESFilmicToneMapping = ACESFilmicToneMapping;
		exports.AddEquation = AddEquation;
		exports.AddOperation = AddOperation;
		exports.AdditiveAnimationBlendMode = AdditiveAnimationBlendMode;
		exports.AdditiveBlending = AdditiveBlending;
		exports.AlphaFormat = AlphaFormat;
		exports.AlwaysDepth = AlwaysDepth;
		exports.AlwaysStencilFunc = AlwaysStencilFunc;
		exports.AmbientLight = AmbientLight;
		exports.AmbientLightProbe = AmbientLightProbe;
		exports.AnimationClip = AnimationClip;
		exports.AnimationLoader = AnimationLoader;
		exports.AnimationMixer = AnimationMixer;
		exports.AnimationObjectGroup = AnimationObjectGroup;
		exports.AnimationUtils = AnimationUtils;
		exports.ArcCurve = ArcCurve;
		exports.ArrayCamera = ArrayCamera;
		exports.ArrowHelper = ArrowHelper;
		exports.Audio = Audio;
		exports.AudioAnalyser = AudioAnalyser;
		exports.AudioContext = AudioContext;
		exports.AudioListener = AudioListener;
		exports.AudioLoader = AudioLoader;
		exports.AxesHelper = AxesHelper;
		exports.AxisHelper = AxisHelper;
		exports.BackSide = BackSide;
		exports.BasicDepthPacking = BasicDepthPacking;
		exports.BasicShadowMap = BasicShadowMap;
		exports.BinaryTextureLoader = BinaryTextureLoader;
		exports.Bone = Bone;
		exports.BooleanKeyframeTrack = BooleanKeyframeTrack;
		exports.BoundingBoxHelper = BoundingBoxHelper;
		exports.Box2 = Box2;
		exports.Box3 = Box3;
		exports.Box3Helper = Box3Helper;
		exports.BoxBufferGeometry = BoxBufferGeometry;
		exports.BoxGeometry = BoxGeometry;
		exports.BoxHelper = BoxHelper;
		exports.BufferAttribute = BufferAttribute;
		exports.BufferGeometry = BufferGeometry;
		exports.BufferGeometryLoader = BufferGeometryLoader;
		exports.ByteType = ByteType;
		exports.Cache = Cache;
		exports.Camera = Camera;
		exports.CameraHelper = CameraHelper;
		exports.CanvasRenderer = CanvasRenderer;
		exports.CanvasTexture = CanvasTexture;
		exports.CatmullRomCurve3 = CatmullRomCurve3;
		exports.CineonToneMapping = CineonToneMapping;
		exports.CircleBufferGeometry = CircleBufferGeometry;
		exports.CircleGeometry = CircleGeometry;
		exports.ClampToEdgeWrapping = ClampToEdgeWrapping;
		exports.Clock = Clock;
		exports.ClosedSplineCurve3 = ClosedSplineCurve3;
		exports.Color = Color;
		exports.ColorKeyframeTrack = ColorKeyframeTrack;
		exports.CompressedTexture = CompressedTexture;
		exports.CompressedTextureLoader = CompressedTextureLoader;
		exports.ConeBufferGeometry = ConeBufferGeometry;
		exports.ConeGeometry = ConeGeometry;
		exports.CubeCamera = CubeCamera;
		exports.CubeGeometry = BoxGeometry;
		exports.CubeReflectionMapping = CubeReflectionMapping;
		exports.CubeRefractionMapping = CubeRefractionMapping;
		exports.CubeTexture = CubeTexture;
		exports.CubeTextureLoader = CubeTextureLoader;
		exports.CubeUVReflectionMapping = CubeUVReflectionMapping;
		exports.CubeUVRefractionMapping = CubeUVRefractionMapping;
		exports.CubicBezierCurve = CubicBezierCurve;
		exports.CubicBezierCurve3 = CubicBezierCurve3;
		exports.CubicInterpolant = CubicInterpolant;
		exports.CullFaceBack = CullFaceBack;
		exports.CullFaceFront = CullFaceFront;
		exports.CullFaceFrontBack = CullFaceFrontBack;
		exports.CullFaceNone = CullFaceNone;
		exports.Curve = Curve;
		exports.CurvePath = CurvePath;
		exports.CustomBlending = CustomBlending;
		exports.CustomToneMapping = CustomToneMapping;
		exports.CylinderBufferGeometry = CylinderBufferGeometry;
		exports.CylinderGeometry = CylinderGeometry;
		exports.Cylindrical = Cylindrical;
		exports.DataTexture = DataTexture;
		exports.DataTexture2DArray = DataTexture2DArray;
		exports.DataTexture3D = DataTexture3D;
		exports.DataTextureLoader = DataTextureLoader;
		exports.DecrementStencilOp = DecrementStencilOp;
		exports.DecrementWrapStencilOp = DecrementWrapStencilOp;
		exports.DefaultLoadingManager = DefaultLoadingManager;
		exports.DepthFormat = DepthFormat;
		exports.DepthStencilFormat = DepthStencilFormat;
		exports.DepthTexture = DepthTexture;
		exports.DirectionalLight = DirectionalLight;
		exports.DirectionalLightHelper = DirectionalLightHelper;
		exports.DiscreteInterpolant = DiscreteInterpolant;
		exports.DodecahedronBufferGeometry = DodecahedronBufferGeometry;
		exports.DodecahedronGeometry = DodecahedronGeometry;
		exports.DoubleSide = DoubleSide;
		exports.DstAlphaFactor = DstAlphaFactor;
		exports.DstColorFactor = DstColorFactor;
		exports.DynamicBufferAttribute = DynamicBufferAttribute;
		exports.DynamicCopyUsage = DynamicCopyUsage;
		exports.DynamicDrawUsage = DynamicDrawUsage;
		exports.DynamicReadUsage = DynamicReadUsage;
		exports.EdgesGeometry = EdgesGeometry;
		exports.EdgesHelper = EdgesHelper;
		exports.EllipseCurve = EllipseCurve;
		exports.EqualDepth = EqualDepth;
		exports.EqualStencilFunc = EqualStencilFunc;
		exports.EquirectangularReflectionMapping = EquirectangularReflectionMapping;
		exports.EquirectangularRefractionMapping = EquirectangularRefractionMapping;
		exports.Euler = Euler;
		exports.EventDispatcher = EventDispatcher;
		exports.ExtrudeBufferGeometry = ExtrudeBufferGeometry;
		exports.ExtrudeGeometry = ExtrudeGeometry;
		exports.Face3 = Face3;
		exports.Face4 = Face4;
		exports.FaceColors = FaceColors;
		exports.FileLoader = FileLoader;
		exports.FlatShading = FlatShading;
		exports.Float32Attribute = Float32Attribute;
		exports.Float32BufferAttribute = Float32BufferAttribute;
		exports.Float64Attribute = Float64Attribute;
		exports.Float64BufferAttribute = Float64BufferAttribute;
		exports.FloatType = FloatType;
		exports.Fog = Fog;
		exports.FogExp2 = FogExp2;
		exports.Font = Font;
		exports.FontLoader = FontLoader;
		exports.FrontSide = FrontSide;
		exports.Frustum = Frustum;
		exports.GLBufferAttribute = GLBufferAttribute;
		exports.GLSL1 = GLSL1;
		exports.GLSL3 = GLSL3;
		exports.GammaEncoding = GammaEncoding;
		exports.Geometry = Geometry;
		exports.GeometryUtils = GeometryUtils;
		exports.GreaterDepth = GreaterDepth;
		exports.GreaterEqualDepth = GreaterEqualDepth;
		exports.GreaterEqualStencilFunc = GreaterEqualStencilFunc;
		exports.GreaterStencilFunc = GreaterStencilFunc;
		exports.GridHelper = GridHelper;
		exports.Group = Group;
		exports.HalfFloatType = HalfFloatType;
		exports.HemisphereLight = HemisphereLight;
		exports.HemisphereLightHelper = HemisphereLightHelper;
		exports.HemisphereLightProbe = HemisphereLightProbe;
		exports.IcosahedronBufferGeometry = IcosahedronBufferGeometry;
		exports.IcosahedronGeometry = IcosahedronGeometry;
		exports.ImageBitmapLoader = ImageBitmapLoader;
		exports.ImageLoader = ImageLoader;
		exports.ImageUtils = ImageUtils;
		exports.ImmediateRenderObject = ImmediateRenderObject;
		exports.IncrementStencilOp = IncrementStencilOp;
		exports.IncrementWrapStencilOp = IncrementWrapStencilOp;
		exports.InstancedBufferAttribute = InstancedBufferAttribute;
		exports.InstancedBufferGeometry = InstancedBufferGeometry;
		exports.InstancedInterleavedBuffer = InstancedInterleavedBuffer;
		exports.InstancedMesh = InstancedMesh;
		exports.Int16Attribute = Int16Attribute;
		exports.Int16BufferAttribute = Int16BufferAttribute;
		exports.Int32Attribute = Int32Attribute;
		exports.Int32BufferAttribute = Int32BufferAttribute;
		exports.Int8Attribute = Int8Attribute;
		exports.Int8BufferAttribute = Int8BufferAttribute;
		exports.IntType = IntType;
		exports.InterleavedBuffer = InterleavedBuffer;
		exports.InterleavedBufferAttribute = InterleavedBufferAttribute;
		exports.Interpolant = Interpolant;
		exports.InterpolateDiscrete = InterpolateDiscrete;
		exports.InterpolateLinear = InterpolateLinear;
		exports.InterpolateSmooth = InterpolateSmooth;
		exports.InvertStencilOp = InvertStencilOp;
		exports.JSONLoader = JSONLoader;
		exports.KeepStencilOp = KeepStencilOp;
		exports.KeyframeTrack = KeyframeTrack;
		exports.LOD = LOD;
		exports.LatheBufferGeometry = LatheBufferGeometry;
		exports.LatheGeometry = LatheGeometry;
		exports.Layers = Layers;
		exports.LensFlare = LensFlare;
		exports.LessDepth = LessDepth;
		exports.LessEqualDepth = LessEqualDepth;
		exports.LessEqualStencilFunc = LessEqualStencilFunc;
		exports.LessStencilFunc = LessStencilFunc;
		exports.Light = Light;
		exports.LightProbe = LightProbe;
		exports.LightShadow = LightShadow;
		exports.Line = Line;
		exports.Line3 = Line3;
		exports.LineBasicMaterial = LineBasicMaterial;
		exports.LineCurve = LineCurve;
		exports.LineCurve3 = LineCurve3;
		exports.LineDashedMaterial = LineDashedMaterial;
		exports.LineLoop = LineLoop;
		exports.LinePieces = LinePieces;
		exports.LineSegments = LineSegments;
		exports.LineStrip = LineStrip;
		exports.LinearEncoding = LinearEncoding;
		exports.LinearFilter = LinearFilter;
		exports.LinearInterpolant = LinearInterpolant;
		exports.LinearMipMapLinearFilter = LinearMipMapLinearFilter;
		exports.LinearMipMapNearestFilter = LinearMipMapNearestFilter;
		exports.LinearMipmapLinearFilter = LinearMipmapLinearFilter;
		exports.LinearMipmapNearestFilter = LinearMipmapNearestFilter;
		exports.LinearToneMapping = LinearToneMapping;
		exports.Loader = Loader;
		exports.LoaderUtils = LoaderUtils;
		exports.LoadingManager = LoadingManager;
		exports.LogLuvEncoding = LogLuvEncoding;
		exports.LoopOnce = LoopOnce;
		exports.LoopPingPong = LoopPingPong;
		exports.LoopRepeat = LoopRepeat;
		exports.LuminanceAlphaFormat = LuminanceAlphaFormat;
		exports.LuminanceFormat = LuminanceFormat;
		exports.MOUSE = MOUSE;
		exports.Material = Material;
		exports.MaterialLoader = MaterialLoader;
		exports.Math = MathUtils;
		exports.MathUtils = MathUtils;
		exports.Matrix3 = Matrix3;
		exports.Matrix4 = Matrix4;
		exports.MaxEquation = MaxEquation;
		exports.Mesh = Mesh;
		exports.MeshBasicMaterial = MeshBasicMaterial;
		exports.MeshDepthMaterial = MeshDepthMaterial;
		exports.MeshDistanceMaterial = MeshDistanceMaterial;
		exports.MeshFaceMaterial = MeshFaceMaterial;
		exports.MeshLambertMaterial = MeshLambertMaterial;
		exports.MeshMatcapMaterial = MeshMatcapMaterial;
		exports.MeshNormalMaterial = MeshNormalMaterial;
		exports.MeshPhongMaterial = MeshPhongMaterial;
		exports.MeshPhysicalMaterial = MeshPhysicalMaterial;
		exports.MeshStandardMaterial = MeshStandardMaterial;
		exports.MeshToonMaterial = MeshToonMaterial;
		exports.MinEquation = MinEquation;
		exports.MirroredRepeatWrapping = MirroredRepeatWrapping;
		exports.MixOperation = MixOperation;
		exports.MultiMaterial = MultiMaterial;
		exports.MultiplyBlending = MultiplyBlending;
		exports.MultiplyOperation = MultiplyOperation;
		exports.NearestFilter = NearestFilter;
		exports.NearestMipMapLinearFilter = NearestMipMapLinearFilter;
		exports.NearestMipMapNearestFilter = NearestMipMapNearestFilter;
		exports.NearestMipmapLinearFilter = NearestMipmapLinearFilter;
		exports.NearestMipmapNearestFilter = NearestMipmapNearestFilter;
		exports.NeverDepth = NeverDepth;
		exports.NeverStencilFunc = NeverStencilFunc;
		exports.NoBlending = NoBlending;
		exports.NoColors = NoColors;
		exports.NoToneMapping = NoToneMapping;
		exports.NormalAnimationBlendMode = NormalAnimationBlendMode;
		exports.NormalBlending = NormalBlending;
		exports.NotEqualDepth = NotEqualDepth;
		exports.NotEqualStencilFunc = NotEqualStencilFunc;
		exports.NumberKeyframeTrack = NumberKeyframeTrack;
		exports.Object3D = Object3D;
		exports.ObjectLoader = ObjectLoader;
		exports.ObjectSpaceNormalMap = ObjectSpaceNormalMap;
		exports.OctahedronBufferGeometry = OctahedronBufferGeometry;
		exports.OctahedronGeometry = OctahedronGeometry;
		exports.OneFactor = OneFactor;
		exports.OneMinusDstAlphaFactor = OneMinusDstAlphaFactor;
		exports.OneMinusDstColorFactor = OneMinusDstColorFactor;
		exports.OneMinusSrcAlphaFactor = OneMinusSrcAlphaFactor;
		exports.OneMinusSrcColorFactor = OneMinusSrcColorFactor;
		exports.OrthographicCamera = OrthographicCamera;
		exports.PCFShadowMap = PCFShadowMap;
		exports.PCFSoftShadowMap = PCFSoftShadowMap;
		exports.PMREMGenerator = PMREMGenerator;
		exports.ParametricBufferGeometry = ParametricBufferGeometry;
		exports.ParametricGeometry = ParametricGeometry;
		exports.Particle = Particle;
		exports.ParticleBasicMaterial = ParticleBasicMaterial;
		exports.ParticleSystem = ParticleSystem;
		exports.ParticleSystemMaterial = ParticleSystemMaterial;
		exports.Path = Path;
		exports.PerspectiveCamera = PerspectiveCamera;
		exports.Plane = Plane;
		exports.PlaneBufferGeometry = PlaneBufferGeometry;
		exports.PlaneGeometry = PlaneGeometry;
		exports.PlaneHelper = PlaneHelper;
		exports.PointCloud = PointCloud;
		exports.PointCloudMaterial = PointCloudMaterial;
		exports.PointLight = PointLight;
		exports.PointLightHelper = PointLightHelper;
		exports.Points = Points;
		exports.PointsMaterial = PointsMaterial;
		exports.PolarGridHelper = PolarGridHelper;
		exports.PolyhedronBufferGeometry = PolyhedronBufferGeometry;
		exports.PolyhedronGeometry = PolyhedronGeometry;
		exports.PositionalAudio = PositionalAudio;
		exports.PropertyBinding = PropertyBinding;
		exports.PropertyMixer = PropertyMixer;
		exports.QuadraticBezierCurve = QuadraticBezierCurve;
		exports.QuadraticBezierCurve3 = QuadraticBezierCurve3;
		exports.Quaternion = Quaternion;
		exports.QuaternionKeyframeTrack = QuaternionKeyframeTrack;
		exports.QuaternionLinearInterpolant = QuaternionLinearInterpolant;
		exports.REVISION = REVISION;
		exports.RGBADepthPacking = RGBADepthPacking;
		exports.RGBAFormat = RGBAFormat;
		exports.RGBAIntegerFormat = RGBAIntegerFormat;
		exports.RGBA_ASTC_10x10_Format = RGBA_ASTC_10x10_Format;
		exports.RGBA_ASTC_10x5_Format = RGBA_ASTC_10x5_Format;
		exports.RGBA_ASTC_10x6_Format = RGBA_ASTC_10x6_Format;
		exports.RGBA_ASTC_10x8_Format = RGBA_ASTC_10x8_Format;
		exports.RGBA_ASTC_12x10_Format = RGBA_ASTC_12x10_Format;
		exports.RGBA_ASTC_12x12_Format = RGBA_ASTC_12x12_Format;
		exports.RGBA_ASTC_4x4_Format = RGBA_ASTC_4x4_Format;
		exports.RGBA_ASTC_5x4_Format = RGBA_ASTC_5x4_Format;
		exports.RGBA_ASTC_5x5_Format = RGBA_ASTC_5x5_Format;
		exports.RGBA_ASTC_6x5_Format = RGBA_ASTC_6x5_Format;
		exports.RGBA_ASTC_6x6_Format = RGBA_ASTC_6x6_Format;
		exports.RGBA_ASTC_8x5_Format = RGBA_ASTC_8x5_Format;
		exports.RGBA_ASTC_8x6_Format = RGBA_ASTC_8x6_Format;
		exports.RGBA_ASTC_8x8_Format = RGBA_ASTC_8x8_Format;
		exports.RGBA_BPTC_Format = RGBA_BPTC_Format;
		exports.RGBA_ETC2_EAC_Format = RGBA_ETC2_EAC_Format;
		exports.RGBA_PVRTC_2BPPV1_Format = RGBA_PVRTC_2BPPV1_Format;
		exports.RGBA_PVRTC_4BPPV1_Format = RGBA_PVRTC_4BPPV1_Format;
		exports.RGBA_S3TC_DXT1_Format = RGBA_S3TC_DXT1_Format;
		exports.RGBA_S3TC_DXT3_Format = RGBA_S3TC_DXT3_Format;
		exports.RGBA_S3TC_DXT5_Format = RGBA_S3TC_DXT5_Format;
		exports.RGBDEncoding = RGBDEncoding;
		exports.RGBEEncoding = RGBEEncoding;
		exports.RGBEFormat = RGBEFormat;
		exports.RGBFormat = RGBFormat;
		exports.RGBIntegerFormat = RGBIntegerFormat;
		exports.RGBM16Encoding = RGBM16Encoding;
		exports.RGBM7Encoding = RGBM7Encoding;
		exports.RGB_ETC1_Format = RGB_ETC1_Format;
		exports.RGB_ETC2_Format = RGB_ETC2_Format;
		exports.RGB_PVRTC_2BPPV1_Format = RGB_PVRTC_2BPPV1_Format;
		exports.RGB_PVRTC_4BPPV1_Format = RGB_PVRTC_4BPPV1_Format;
		exports.RGB_S3TC_DXT1_Format = RGB_S3TC_DXT1_Format;
		exports.RGFormat = RGFormat;
		exports.RGIntegerFormat = RGIntegerFormat;
		exports.RawShaderMaterial = RawShaderMaterial;
		exports.Ray = Ray;
		exports.Raycaster = Raycaster;
		exports.RectAreaLight = RectAreaLight;
		exports.RedFormat = RedFormat;
		exports.RedIntegerFormat = RedIntegerFormat;
		exports.ReinhardToneMapping = ReinhardToneMapping;
		exports.RepeatWrapping = RepeatWrapping;
		exports.ReplaceStencilOp = ReplaceStencilOp;
		exports.ReverseSubtractEquation = ReverseSubtractEquation;
		exports.RingBufferGeometry = RingBufferGeometry;
		exports.RingGeometry = RingGeometry;
		exports.SRGB8_ALPHA8_ASTC_10x10_Format = SRGB8_ALPHA8_ASTC_10x10_Format;
		exports.SRGB8_ALPHA8_ASTC_10x5_Format = SRGB8_ALPHA8_ASTC_10x5_Format;
		exports.SRGB8_ALPHA8_ASTC_10x6_Format = SRGB8_ALPHA8_ASTC_10x6_Format;
		exports.SRGB8_ALPHA8_ASTC_10x8_Format = SRGB8_ALPHA8_ASTC_10x8_Format;
		exports.SRGB8_ALPHA8_ASTC_12x10_Format = SRGB8_ALPHA8_ASTC_12x10_Format;
		exports.SRGB8_ALPHA8_ASTC_12x12_Format = SRGB8_ALPHA8_ASTC_12x12_Format;
		exports.SRGB8_ALPHA8_ASTC_4x4_Format = SRGB8_ALPHA8_ASTC_4x4_Format;
		exports.SRGB8_ALPHA8_ASTC_5x4_Format = SRGB8_ALPHA8_ASTC_5x4_Format;
		exports.SRGB8_ALPHA8_ASTC_5x5_Format = SRGB8_ALPHA8_ASTC_5x5_Format;
		exports.SRGB8_ALPHA8_ASTC_6x5_Format = SRGB8_ALPHA8_ASTC_6x5_Format;
		exports.SRGB8_ALPHA8_ASTC_6x6_Format = SRGB8_ALPHA8_ASTC_6x6_Format;
		exports.SRGB8_ALPHA8_ASTC_8x5_Format = SRGB8_ALPHA8_ASTC_8x5_Format;
		exports.SRGB8_ALPHA8_ASTC_8x6_Format = SRGB8_ALPHA8_ASTC_8x6_Format;
		exports.SRGB8_ALPHA8_ASTC_8x8_Format = SRGB8_ALPHA8_ASTC_8x8_Format;
		exports.Scene = Scene;
		exports.SceneUtils = SceneUtils;
		exports.ShaderChunk = ShaderChunk;
		exports.ShaderLib = ShaderLib;
		exports.ShaderMaterial = ShaderMaterial;
		exports.ShadowMaterial = ShadowMaterial;
		exports.Shape = Shape;
		exports.ShapeBufferGeometry = ShapeBufferGeometry;
		exports.ShapeGeometry = ShapeGeometry;
		exports.ShapePath = ShapePath;
		exports.ShapeUtils = ShapeUtils;
		exports.ShortType = ShortType;
		exports.Skeleton = Skeleton;
		exports.SkeletonHelper = SkeletonHelper;
		exports.SkinnedMesh = SkinnedMesh;
		exports.SmoothShading = SmoothShading;
		exports.Sphere = Sphere;
		exports.SphereBufferGeometry = SphereBufferGeometry;
		exports.SphereGeometry = SphereGeometry;
		exports.Spherical = Spherical;
		exports.SphericalHarmonics3 = SphericalHarmonics3;
		exports.Spline = Spline;
		exports.SplineCurve = SplineCurve;
		exports.SplineCurve3 = SplineCurve3;
		exports.SpotLight = SpotLight;
		exports.SpotLightHelper = SpotLightHelper;
		exports.Sprite = Sprite;
		exports.SpriteMaterial = SpriteMaterial;
		exports.SrcAlphaFactor = SrcAlphaFactor;
		exports.SrcAlphaSaturateFactor = SrcAlphaSaturateFactor;
		exports.SrcColorFactor = SrcColorFactor;
		exports.StaticCopyUsage = StaticCopyUsage;
		exports.StaticDrawUsage = StaticDrawUsage;
		exports.StaticReadUsage = StaticReadUsage;
		exports.StereoCamera = StereoCamera;
		exports.StreamCopyUsage = StreamCopyUsage;
		exports.StreamDrawUsage = StreamDrawUsage;
		exports.StreamReadUsage = StreamReadUsage;
		exports.StringKeyframeTrack = StringKeyframeTrack;
		exports.SubtractEquation = SubtractEquation;
		exports.SubtractiveBlending = SubtractiveBlending;
		exports.TOUCH = TOUCH;
		exports.TangentSpaceNormalMap = TangentSpaceNormalMap;
		exports.TetrahedronBufferGeometry = TetrahedronBufferGeometry;
		exports.TetrahedronGeometry = TetrahedronGeometry;
		exports.TextBufferGeometry = TextBufferGeometry;
		exports.TextGeometry = TextGeometry;
		exports.Texture = Texture;
		exports.TextureLoader = TextureLoader;
		exports.TorusBufferGeometry = TorusBufferGeometry;
		exports.TorusGeometry = TorusGeometry;
		exports.TorusKnotBufferGeometry = TorusKnotBufferGeometry;
		exports.TorusKnotGeometry = TorusKnotGeometry;
		exports.Triangle = Triangle;
		exports.TriangleFanDrawMode = TriangleFanDrawMode;
		exports.TriangleStripDrawMode = TriangleStripDrawMode;
		exports.TrianglesDrawMode = TrianglesDrawMode;
		exports.TubeBufferGeometry = TubeBufferGeometry;
		exports.TubeGeometry = TubeGeometry;
		exports.UVMapping = UVMapping;
		exports.Uint16Attribute = Uint16Attribute;
		exports.Uint16BufferAttribute = Uint16BufferAttribute;
		exports.Uint32Attribute = Uint32Attribute;
		exports.Uint32BufferAttribute = Uint32BufferAttribute;
		exports.Uint8Attribute = Uint8Attribute;
		exports.Uint8BufferAttribute = Uint8BufferAttribute;
		exports.Uint8ClampedAttribute = Uint8ClampedAttribute;
		exports.Uint8ClampedBufferAttribute = Uint8ClampedBufferAttribute;
		exports.Uniform = Uniform;
		exports.UniformsLib = UniformsLib;
		exports.UniformsUtils = UniformsUtils;
		exports.UnsignedByteType = UnsignedByteType;
		exports.UnsignedInt248Type = UnsignedInt248Type;
		exports.UnsignedIntType = UnsignedIntType;
		exports.UnsignedShort4444Type = UnsignedShort4444Type;
		exports.UnsignedShort5551Type = UnsignedShort5551Type;
		exports.UnsignedShort565Type = UnsignedShort565Type;
		exports.UnsignedShortType = UnsignedShortType;
		exports.VSMShadowMap = VSMShadowMap;
		exports.Vector2 = Vector2;
		exports.Vector3 = Vector3;
		exports.Vector4 = Vector4;
		exports.VectorKeyframeTrack = VectorKeyframeTrack;
		exports.Vertex = Vertex;
		exports.VertexColors = VertexColors;
		exports.VideoTexture = VideoTexture;
		exports.WebGL1Renderer = WebGL1Renderer;
		exports.WebGLCubeRenderTarget = WebGLCubeRenderTarget;
		exports.WebGLMultisampleRenderTarget = WebGLMultisampleRenderTarget;
		exports.WebGLRenderTarget = WebGLRenderTarget;
		exports.WebGLRenderTargetCube = WebGLRenderTargetCube;
		exports.WebGLRenderer = WebGLRenderer;
		exports.WebGLUtils = WebGLUtils;
		exports.WireframeGeometry = WireframeGeometry;
		exports.WireframeHelper = WireframeHelper;
		exports.WrapAroundEnding = WrapAroundEnding;
		exports.XHRLoader = XHRLoader;
		exports.ZeroCurvatureEnding = ZeroCurvatureEnding;
		exports.ZeroFactor = ZeroFactor;
		exports.ZeroSlopeEnding = ZeroSlopeEnding;
		exports.ZeroStencilOp = ZeroStencilOp;
		exports.sRGBEncoding = sRGBEncoding;

		Object.defineProperty(exports, '__esModule', { value: true });

	})));


/***/ })
/******/ ]);