mirror of
https://github.com/nillerusr/source-engine.git
synced 2024-12-22 14:16:50 +00:00
95 lines
2.5 KiB
V Shell
95 lines
2.5 KiB
V Shell
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vs.1.1
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# DYNAMIC: "DOWATERFOG" "0..1"
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;------------------------------------------------------------------------------
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; Constants specified by the app
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; c0 = (0, 1, 2, 0.5)
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; c1 = (1/2.2, 0, 0, 0)
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; c2 = camera position *in world space*
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; c4-c7 = modelViewProj matrix (transpose)
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; c8-c11 = ViewProj matrix (transpose)
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; c12-c15 = model->view matrix (transpose)
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; c16 = [fogStart, fogEnd, fogRange, undefined]
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;
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; $SHADER_SPECIFIC_CONST_0..$SHADER_SPECIFIC_CONST_3 - special proj matrix
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;
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; Vertex components (as specified in the vertex DECL)
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; $vPos = Position
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; $vTexCoord0.xy = TexCoord0
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;------------------------------------------------------------------------------
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#include "macros.vsh"
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; Vertex components
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; $vPos = Position
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; $vNormal = normal
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; $vTexCoord0.xy = TexCoord0
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; $vTangentS = S axis of Texture space
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; $vTangentT = T axis of Texture space
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;------------------------------------------------------------------------------
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; Transform the position from world to view space
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;------------------------------------------------------------------------------
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alloc $projPos
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; Transform position from object to projection space
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dp4 $projPos.x, $vPos, $cModelViewProj0
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dp4 $projPos.y, $vPos, $cModelViewProj1
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dp4 $projPos.z, $vPos, $cModelViewProj2
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dp4 $projPos.w, $vPos, $cModelViewProj3
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mov oPos, $projPos
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alloc $worldPos
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; Transform position from object to world space
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dp4 $worldPos.x, $vPos, $cModel0
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dp4 $worldPos.y, $vPos, $cModel1
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dp4 $worldPos.z, $vPos, $cModel2
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&CalcFog( $worldPos, $projPos );
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alloc $worldEyeVect
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; Get the eye vector in world space
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add $worldEyeVect.xyz, -$worldPos, $cEyePos
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alloc $tangentEyeVect
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; transform the eye vector to tangent space
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dp3 $tangentEyeVect.x, $worldEyeVect, $vTangentS
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dp3 $tangentEyeVect.y, $worldEyeVect, $vTangentT
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dp3 $tangentEyeVect.z, $worldEyeVect, $vNormal
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mov $tangentEyeVect.w, $cZero
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mov oT5, $tangentEyeVect
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; base coordinates
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dp4 oT0.x, $vTexCoord0, $SHADER_SPECIFIC_CONST_1
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dp4 oT0.y, $vTexCoord0, $SHADER_SPECIFIC_CONST_2
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; reflection
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alloc $projPosReflect
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mov $projPosReflect, $projPos
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add $projPosReflect.xy, $projPosReflect, $projPosReflect.w
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mul $projPosReflect.xy, $projPosReflect, $cHalf
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mov oT1, $projPosReflect
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; refraction
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mov $projPos.y, -$projPos.y
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add $projPos.xy, $projPos, $projPos.w
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mul $projPos.xy, $projPos, $cHalf
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mov oT2, $projPos
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; reflectionscale, refractionscale
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mov oT4, $SHADER_SPECIFIC_CONST_4
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free $worldEyeVect
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free $tangentEyeVect
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free $projPosReflect
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free $worldPos
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free $projPos
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