uniform mat4 uMVPMatrix; //总变换矩阵
uniform mat4 uMMatrix; //变换矩阵
uniform vec3 uCamera;	//摄像机位置
attribute vec3 aPosition;  //顶点位置
attribute vec2 aTexCoor;    //顶点纹理坐标
varying vec2 vTextureCoord;
void main()     
{                            		
   gl_Position = uMVPMatrix * vec4(aPosition,1); //根据总变换矩阵计算此次绘制此顶点位置
      //将顶点的纹理坐标传给片元着色器
   vTextureCoord=aTexCoor;  
}