玩家死亡，屏幕灰白效果实现

一个RGB颜色的亮度和各个分量之间的关系的公式为：GrayValue = 0.3 * R + 0.59*G  + 0.11 *B 
sampler2D Texture0;
float4 ps_main( float2 texCoord  : TEXCOORD0 ) : COLOR
{
	float4 _inColor = tex2D( Texture0, texCoord );
	float h = 0.3*_inColor.x + 0.59*_inColor.y + 0.11*_inColor.z;
 	float4 _outColor = float4(h,h,h,1.0);
 	return _outColor;
}

 

http://www.gamerendering.com/2008/12/20/radial-blur-filter/