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118 lines
3.1 KiB
118 lines
3.1 KiB
5 years ago
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vs.1.1
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#include "macros.vsh"
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# DYNAMIC: "DOWATERFOG" "0..1"
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;------------------------------------------------------------------------------
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; The cable equation is:
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; [L dot N] * C * T
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;
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; where:
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; C = directional light color
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; T = baseTexture
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; N = particle normal (stored in the normal map)
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; L = directional light direction
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;
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; $SHADER_SPECIFIC_CONST_0 = Directional light direction
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;------------------------------------------------------------------------------
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;------------------------------------------------------------------------------
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; Transform position from object to projection space
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;------------------------------------------------------------------------------
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&AllocateRegister( \$projPos );
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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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;------------------------------------------------------------------------------
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; Fog
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;------------------------------------------------------------------------------
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alloc $worldPos
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if( $DOWATERFOG == 1 )
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{
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; Get the worldpos z component only since that's all we need for height fog
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dp4 $worldPos.z, $vPos, $cModel2
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}
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&CalcFog( $worldPos, $projPos );
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free $worldPos
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&FreeRegister( \$projPos );
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;------------------------------------------------------------------------------
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; Setup the tangent space
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;------------------------------------------------------------------------------
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&AllocateRegister( \$tmp1 );
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&AllocateRegister( \$tmp2 );
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&AllocateRegister( \$tmp3 );
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&AllocateRegister( \$r );
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; Get S crossed with T (call it R)
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mov $tmp1, $vTangentS
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mov $tmp2, $vTangentT
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mul $tmp3, $vTangentS.yzxw, $tmp2.zxyw
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mad $r, -$vTangentS.zxyw, $tmp2.yzxw, $tmp3
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&FreeRegister( \$tmp2 );
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&FreeRegister( \$tmp3 );
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&AllocateRegister( \$s );
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; Normalize S (into $s)
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dp3 $s.w, $vTangentS, $vTangentS
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rsq $s.w, $s.w
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mul $s.xyz, $vTangentS, $s.w
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; Normalize R (into $r)
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dp3 $r.w, $r, $r
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rsq $r.w, $r.w
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mul $r.xyz, $r, $r.w
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&AllocateRegister( \$t );
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; Regenerate T (into $t)
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mul $t, $r.yzxw, $tmp1.zxyw
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mad $t, -$r.zxyw, $tmp1.yzxw, $t
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&FreeRegister( \$tmp1 );
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;------------------------------------------------------------------------------
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; Transform the light direction (into oD1)
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;------------------------------------------------------------------------------
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&AllocateRegister( \$lightDirection );
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dp3 $lightDirection.x, $s, $SHADER_SPECIFIC_CONST_0
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dp3 $lightDirection.y, $t, $SHADER_SPECIFIC_CONST_0
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dp3 $lightDirection.z, $r, $SHADER_SPECIFIC_CONST_0
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&FreeRegister( \$r );
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&FreeRegister( \$s );
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&FreeRegister( \$t );
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; Scale into 0-1 range (we're assuming light direction was normalized prior to here)
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add oT2, $lightDirection, $cHalf ; + 0.5
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&FreeRegister( \$lightDirection );
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;------------------------------------------------------------------------------
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; Copy texcoords for the normal map and base texture
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;------------------------------------------------------------------------------
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mov oT0, $vTexCoord0
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mov oT1, $vTexCoord1
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; Pass the dirlight color through
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mov oD0.xyzw, $vColor
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