Justin Marshall
61 lines
1.7 KiB
Plaintext
61 lines
1.7 KiB
Plaintext
{
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parms {
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stageSort sortCoverage
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}
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state {
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depthfunc GL_LEQUAL
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}
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hlsl_vp {
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// Convert back from 16 bit vertex elements.
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float4 position = vertex.position * $vertexXYZScale + $vertexXYZBias;
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result.position.x = dot( position, $mvpMatrixX );
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result.position.y = dot( position, $mvpMatrixY );
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result.position.z = dot( position, $mvpMatrixZ );
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result.position.w = dot( position, $mvpMatrixW );
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}
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hlsl_fp {
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// this is normalized window space, not strict openGL window space
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// that uses integer viewport values.
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float3 window;
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window.xy = screenPosToTexcoord( fragment.position.xy, $renderPositionToViewTexture );
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// fetch the window space depth value
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// this instruction does the 1.0 - depth calculation automatically
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window.z = tex2Ddepth( $viewDepthMap, window.xy );
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#ifndef PC
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window.y = 1.0 - window.y; // image y origin adjust
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#endif
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// move the window space 0.0 - 1.0 xyz to -1.0 - 1.0
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// normalized device coordinate, assumes a full depth range
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float3 device = ( window.xyz * 2.0 ) - 1.0;
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#ifdef XBOX
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device.z = window.z; // D3D has a non-clipped Z range of 0 to W, while OpenGL/PS3 has -W to W
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#endif
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float4 d;
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d.xyz = device;
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d.w = 1;
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float4 wclip;
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wclip.x = dot4( d, $inverseMVPMatrixX );
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wclip.y = dot4( d, $inverseMVPMatrixY );
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wclip.z = dot4( d, $inverseMVPMatrixZ );
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wclip.w = dot4( d, $inverseMVPMatrixW );
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wclip.xyzw /= wclip.w;
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// now transform to the light clip space
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float4 light;
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light.x = dot4( wclip, $lightProjectionS );
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light.y = dot4( wclip, $lightProjectionT );
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light.z = dot4( wclip, $lightProjectionR );
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light.w = dot4( wclip, $lightProjectionQ );
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float shadowVal = tex2D( $globalShadows, light.xy ).x;
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result.color = _float4( shadowVal );
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}
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} |