mirror of
https://github.com/thug1src/thug.git
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54 lines
1.6 KiB
V Shell
54 lines
1.6 KiB
V Shell
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xvs.1.1
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; Constants:
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; c0 - c3 WVP Matrix (WORLD*VIEW*PROJECTION)
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; c4 Screen right vector
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; c5 Screen up vector
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; c6 Screen at vector
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; In:
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; v0 - Position (actually the position of the pivot point)
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; v1 - Normal (actually the position of the point relative to the pivot)
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; v2 - Vertex color
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; v3 - TexCoord0
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; v4 - TexCoord1
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; v5 - TexCoord2
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; v6 - TexCoord3
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; Out:
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; oPos - Position
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; oTn - TextureCoords
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;------------------------------------------------------------------------------
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; Pivot relative position -> world relative position, plus copy texture coordinates
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; (interleaving these helps prevent stalls)
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;------------------------------------------------------------------------------
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mul r0.xyz, v1.x, c4
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mov oT0, v3
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mad r0.xyz, v1.y, c5, r0
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mov oT1, v4
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mad r0.xyz, v1.z, c6, r0
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mov oT2, v5
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add r0.xyz, v0, r0
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mov oT3, v6
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sge r0.w, c0.x, c0.x ; Set r0.w = 1.0
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;------------------------------------------------------------------------------
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; Vertex color
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;------------------------------------------------------------------------------
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mov oD0, v2
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;------------------------------------------------------------------------------
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; Vertex->screen transform
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;------------------------------------------------------------------------------
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dp4 oPos.x, r0, c0
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dp4 oPos.y, r0, c1
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dp4 oPos.z, r0, c2
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dp4 oPos.w, r0, c3
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;------------------------------------------------------------------------------
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; Deal with fog value (r12 shadows oPos)...
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;------------------------------------------------------------------------------
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mov oFog.x, -r12.w
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