shadowmapps.txt

游戏中我们经常看到的影子效果

//Pixel shader for shadow mapping
//Does (diffuse+specular)*tex0
//Believe it or not, this is not possible without pixel shaders, since in D3D the specular
//component is always added after the texture stages.

ps.1.1			//version 1.1
tex t0			//sample shadow map

add r1, v0, v1	//r1=diffuse+specular
mul r0, r1, t0	//r0=(diffuse+specular)*shadow map