precision mediump float;
//接收从顶点着色器过来的参数
varying vec4 vambient;
varying vec4 vdiffuse;
varying vec4 vspecular;
void main()                         
{    
   //将计算出的颜色给此片元
   vec4 finalColor=vec4(0.9,0.01,0.01,1.0);   
   gl_FragColor = finalColor*vambient+finalColor*vspecular+finalColor*vdiffuse;//给此片元颜色值
}