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43 lines
744 B
GLSL
43 lines
744 B
GLSL
xvs.1.1
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; Constants:
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; c0 - c3 - WVP Matrix (WORLD*VIEW*PROJECTION)
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; c4 - c7 - WT Matrix (WORLD*TEXTURETRANSFORM)
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; c8 - local space light position.
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; In:
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; v0 - Position
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; v1 - Vertex color
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; v2 - TexCoord0
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; Out:
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; oPos - Position
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; oTn - TextureCoords
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;vertex->screen
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dp4 oPos.x, v0, c0
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dp4 oPos.y, v0, c1
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dp4 oPos.z, v0, c2
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dp4 oPos.w, v0, c3
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;diffuse lighting (not necessary for our purposes)
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;add r0,c8,-v0
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;dp3 r0.w,r0,r0
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;rsq r1.x,r0.w
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;mul r0,r0,r1.x
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;dp3 oD0,v1,r0
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;decal texture
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mov oT0, v2
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;vertex->shadowbuffer texcoords
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dp4 oT1.x, v0, c4
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dp4 oT1.y, v0, c5
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dp4 oT1.z, v0, c6
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dp4 r0.w, v0, c7
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;clamp w (q) to 0
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slt r1, c0, c0
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max r0.w, r0.w, r1.w
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mov oT1.w, r0.w
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