#ifdef GL_ES
precision mediump float;
#endif
uniform vec4 U_LightPos;
uniform vec4 U_LightAmbient;
uniform vec4 U_LightDiffuse;
uniform vec4 U_AmbientMaterial;
uniform vec4 U_DiffuseMaterial;
varying vec4 V_Color;
varying vec4 V_Normal;
void main()
{
	vec4 color=vec4(0.0,0.0,0.0,0.0);
	vec4 ambientColor=U_LightAmbient*U_AmbientMaterial;
	vec3 lightPos=U_LightPos.xyz;
	vec3 L=lightPos;
	L=normalize(L);
	vec3 n=normalize(V_Normal.xyz);
	float diffuseIntensity=max(0.0,dot(L,n));
	vec4 diffuseColor=U_LightDiffuse*U_DiffuseMaterial*diffuseIntensity;
	color=ambientColor+diffuseColor;
	gl_FragColor=color;
}