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source-sdk-2013/sp/src/materialsystem/stdshaders/shadowmodel_ps20.fxc
Joe Ludwig 7309a5f13f Added many shader source files
This should include the latest version of every shader that was in the
2007 SDK. It also includes a smattering of debug shaders, both VR
distortion shaders, and other assorted shaders that will hopefully be
useful.

None of these new files are included in the game shader DLL project. If
you need to modify one of these shaders for use in your mod you will
need to rename it so that you don't collide with the version of that
shader that lives in stdshader_dx9.dll.
2013-12-23 15:00:03 -08:00

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struct PS_INPUT
{
float4 T0 : TEXCOORD0;
float3 T1 : TEXCOORD1;
float3 T2 : TEXCOORD2;
float T3 : TEXCOORD3;
float3 vColor : COLOR0;
};
float4 main( PS_INPUT i ) : COLOR
{
// Kill pixel against various fields computed in vertex shader
clip ( i.T1 );
clip ( i.T2 );
clip ( i.T3 ); // Backface cull
// i.T0.a is uninitialized by the vs, but this is how the original asm shader was written????
return float4( lerp( float3(1,1,1), i.vColor.xyz, i.T0.a ), 1 );
}