cube完成

src/render/core/Primitives.ts

@@ -1,4 +1,4 @@
-import { vec2, vec3, vec4, mat4 } from "../math";
+import { vec2, vec3, vec4, mat4, Util } from "../math";
 import { GLAttribBits, GLAttribState } from "../webgl/WebGLAttribState";
 import { GLStaticMesh } from "../webgl/WebGLMesh";
 
@@ -122,7 +122,105 @@ export class GeometryData {
         }
 
         let mesh: GLStaticMesh = new GLStaticMesh(gl, bits, buffer, this.indices.length > 0 ? new Uint16Array(this.indices) : null);
-
+        this.buildBoundingBoxTo(mesh.mins, mesh.maxs);
         return mesh;
     }
+
+    /**
+     * 获取包围盒数据
+     * @param mins 
+     * @param maxs 
+     */
+    public buildBoundingBoxTo(mins: vec3, maxs: vec3): void {
+        for (let i: number = 0; i < this.positions.length; i++) {
+            Util.boundBoxAddPoint(this.positions[i], mins, maxs);
+        }
+    }
+}
+
+export class Cube {
+    /**
+     * @var 半宽
+     */
+    public halfWidth: number;
+
+    /**
+     * @var 半高
+     */
+    public halfHeight: number;
+
+    /**
+     * @var 半深
+     */
+    public halfDepth: number;
+
+    public constructor(halfWidth: number = 0.2, halfHeight: number = 0.2, halfDepth: number = 0.2) {
+        this.halfWidth = halfWidth;
+        this.halfHeight = halfHeight;
+        this.halfDepth = halfDepth;
+    }
+
+    /*
+            /3--------/7  |
+            / |       /   |
+            /  |      /   |
+            1---------5   |
+            |  /2- - -|- -6
+            | /       |  /
+            |/        | /
+            0---------4/
+
+    */
+
+    public makeGeometryDataWithTextureCoord(): GeometryData {
+        let ret: GeometryData = new GeometryData();
+        ret.positions = [
+            new vec3([-this.halfWidth, -this.halfHeight, this.halfDepth]), // 0
+            new vec3([this.halfWidth, -this.halfHeight, this.halfDepth]),  // 4
+            new vec3([this.halfWidth, this.halfHeight, this.halfDepth])  // 5
+        ];
+
+        ret.uvs = [
+            new vec2([0, 0]),
+            new vec2([1, 0]),
+            new vec2([1, 1])
+        ];
+        return ret;
+    }
+
+    public makeGeometryData(): GeometryData {
+        let ret: GeometryData = new GeometryData();
+
+        ret.positions.push(new vec3([-this.halfWidth, -this.halfHeight, this.halfDepth])); //0
+        ret.uvs.push(new vec2([1, 0]));
+
+        ret.positions.push(new vec3([-this.halfWidth, this.halfHeight, this.halfDepth])); //1
+        ret.uvs.push(new vec2([1, 1]));
+
+        ret.positions.push(new vec3([-this.halfWidth, -this.halfHeight, -this.halfDepth])); //2
+        ret.uvs.push(new vec2([0, 0]));
+
+        ret.positions.push(new vec3([-this.halfWidth, this.halfHeight, -this.halfDepth])); //3
+        ret.uvs.push(new vec2([0, 1]));
+
+        ret.positions.push(new vec3([this.halfWidth, -this.halfHeight, this.halfDepth])); //4
+        ret.uvs.push(new vec2([0, 0]));
+
+        ret.positions.push(new vec3([this.halfWidth, this.halfHeight, this.halfDepth])); //5
+        ret.uvs.push(new vec2([0, 1]));
+
+        ret.positions.push(new vec3([this.halfWidth, -this.halfHeight, -this.halfDepth])); //6
+        ret.uvs.push(new vec2([1, 0]));
+
+        ret.positions.push(new vec3([this.halfWidth, this.halfHeight, -this.halfDepth])); //7
+        ret.uvs.push(new vec2([1, 1]));
+
+        ret.indices.push(0, 1, 3, 0, 3, 2); // 左边
+        ret.indices.push(3, 7, 6, 3, 6, 2); // 后面
+        ret.indices.push(6, 7, 5, 6, 5, 4); // 右面
+        ret.indices.push(5, 1, 0, 5, 0, 4); // 前面
+        ret.indices.push(1, 5, 7, 1, 7, 3); // 上面
+        ret.indices.push(2, 6, 4, 2, 4, 0); // 下面
+        return ret;
+    }
 }