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59 lines
1.5 KiB
59 lines
1.5 KiB
//======= Copyright © 1996-2006, Valve Corporation, All rights reserved. ====== |
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// STATIC: "CONSTANTBASEDMORPH" "0..1" |
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#define HDRTYPE HDR_TYPE_NONE |
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#include "common_ps_fxc.h" |
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struct PS_INPUT |
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{ |
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float2 vSrcCoord : TEXCOORD0; |
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float2 vSideSpeedCoord : TEXCOORD1; |
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#if CONSTANTBASEDMORPH |
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float4 vMorphWeights : TEXCOORD2; |
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#else |
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float2 vMorphWeightCoord : TEXCOORD2; |
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#endif |
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}; |
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sampler MorphTarget : register( s0 ); |
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sampler SideSpeedMap : register( s1 ); |
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#if !CONSTANTBASEDMORPH |
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sampler MorphWeights : register( s2 ); |
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#endif |
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const float4 vMorphScale : register( c0 ); |
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HALF4 main( PS_INPUT i ) : COLOR |
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{ |
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#if CONSTANTBASEDMORPH |
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float4 vMorphWeights = i.vMorphWeights; |
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#else |
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float4 vMorphWeights = tex2D( MorphWeights, i.vMorphWeightCoord ); |
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#endif |
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float4 delta = tex2D( MorphTarget, i.vSrcCoord ); |
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float4 sideSpeed = tex2D( SideSpeedMap, i.vSideSpeedCoord ); |
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// NOTE: This is necessary to fixup slight errors in the delta. |
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// On the cpu, only the range 0-65534 is used so we can encode -1, 0, and 1 exactly. |
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delta *= 65535.0f / 65534.0f; |
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// Compute total weight, taking into account side + speed |
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float flWeight = lerp( vMorphWeights.y, vMorphWeights.x, sideSpeed.y ); |
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float flStereoWeight = lerp( vMorphWeights.w, vMorphWeights.z, sideSpeed.y ); |
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float w = lerp( flWeight, flStereoWeight, sideSpeed.x ); |
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// Convert 0-1 -> -1 to 1 |
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delta *= 2.0f; |
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delta -= float4( 1.0f, 1.0f, 1.0f, 1.0f ); |
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// Apply the morph scale |
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delta *= vMorphScale; |
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// Apply weight |
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delta *= w; |
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return delta; |
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} |
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