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c9355c292c
optimized shaders to use SvPosition where possible, following change could remove some unused interpolator [CL 2697164 by Martin Mittring in Main branch]
131 lines
3.8 KiB
Plaintext
131 lines
3.8 KiB
Plaintext
// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.
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/*=============================================================================
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LandscapeGrassWeightVertexShader.usf: Vertex shader to dump the weight map for Landscape Grass
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=============================================================================*/
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#include "Common.usf"
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#include "Material.usf"
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#include "VertexFactory.usf"
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struct FLandscapeGrassWeightInterpolantsVSToPS
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{
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FVertexFactoryInterpolantsVSToPS FactoryInterpolants;
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float4 PixelPosition : TEXCOORD8; // xyz = world position, w = clip z
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float2 Height : TEXCOORD9;
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float4 Position : SV_POSITION;
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};
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#if VERTEXSHADER
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float2 RenderOffset;
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/** Vertex Shader */
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void VSMain(
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FVertexFactoryInput Input,
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out FLandscapeGrassWeightInterpolantsVSToPS Output
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)
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{
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FVertexFactoryIntermediates VFIntermediates = GetVertexFactoryIntermediates(Input);
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float4 WorldPositionExcludingWPO = VertexFactoryGetWorldPosition(Input, VFIntermediates);
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float4 WorldPosition = WorldPositionExcludingWPO;
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half3x3 TangentToLocal = VertexFactoryGetTangentToLocal(Input, VFIntermediates);
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FMaterialVertexParameters VertexParameters = GetMaterialVertexParameters(Input, VFIntermediates, WorldPosition.xyz, TangentToLocal);
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half3 WorldPositionOffset = GetMaterialWorldPositionOffset(VertexParameters);
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WorldPosition.xyz += WorldPositionOffset;
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float4 RasterizedWorldPosition = VertexFactoryGetRasterizedWorldPosition(Input, VFIntermediates, WorldPosition);
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Output.PixelPosition = WorldPosition;
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Output.Position = mul(RasterizedWorldPosition, View.TranslatedWorldToClip);
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Output.FactoryInterpolants = VertexFactoryGetInterpolantsVSToPS(Input, VFIntermediates, VertexParameters);
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Output.Height = LandscapeVertexFactorySampleHeight(Input, VFIntermediates);
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Output.Position.xy += RenderOffset;
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Output.PixelPosition.w = Output.Position.w;
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}
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#elif PIXELSHADER
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int OutputPass;
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// Pixel Shader
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void PSMain(
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FLandscapeGrassWeightInterpolantsVSToPS Interpolants,
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in float4 SvPosition : SV_Position
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OPTIONAL_IsFrontFace,
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out half4 OutColor : SV_Target0
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)
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{
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FMaterialPixelParameters MaterialParameters = GetMaterialPixelParameters(Interpolants.FactoryInterpolants, SvPosition);
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CalcMaterialParameters(MaterialParameters, SvPosition, bIsFrontFace);
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#if NUM_MATERIAL_OUTPUTS_GETGRASSWEIGHT > 2
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switch(OutputPass)
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{
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case 0:
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#endif
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// Height, outputs 1 & 2
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OutColor.xy = Interpolants.Height;
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#if NUM_MATERIAL_OUTPUTS_GETGRASSWEIGHT > 0
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OutColor.z = GetGrassWeight0(MaterialParameters);
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#if NUM_MATERIAL_OUTPUTS_GETGRASSWEIGHT > 1
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OutColor.w = GetGrassWeight1(MaterialParameters);
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#else
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OutColor.w = 0;
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#endif
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#else
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OutColor.z = 0;
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OutColor.w = 0;
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#endif
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#if NUM_MATERIAL_OUTPUTS_GETGRASSWEIGHT > 2
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break;
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case 1:
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OutColor.x = GetGrassWeight2(MaterialParameters);
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#if NUM_MATERIAL_OUTPUTS_GETGRASSWEIGHT > 3
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OutColor.y = GetGrassWeight3(MaterialParameters);
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#else
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OutColor.y = 0;
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#endif
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#if NUM_MATERIAL_OUTPUTS_GETGRASSWEIGHT > 4
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OutColor.z = GetGrassWeight4(MaterialParameters);
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#else
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OutColor.z = 0;
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#endif
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#if NUM_MATERIAL_OUTPUTS_GETGRASSWEIGHT > 5
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OutColor.w = GetGrassWeight5(MaterialParameters);
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#else
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OutColor.w = 0;
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#endif
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break;
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#if NUM_MATERIAL_OUTPUTS_GETGRASSWEIGHT > 6
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case 2:
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OutColor.x = GetGrassWeight6(MaterialParameters);
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#if NUM_MATERIAL_OUTPUTS_GETGRASSWEIGHT > 7
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OutColor.y = GetGrassWeight7(MaterialParameters);
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#else
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OutColor.y = 0;
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#endif
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#if NUM_MATERIAL_OUTPUTS_GETGRASSWEIGHT > 8
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OutColor.z = GetGrassWeight8(MaterialParameters);
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#else
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OutColor.z = 0;
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#endif
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#if NUM_MATERIAL_OUTPUTS_GETGRASSWEIGHT > 9
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OutColor.w = GetGrassWeight9(MaterialParameters);
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#else
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OutColor.w = 0;
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#endif
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break;
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#endif // NUM_MATERIAL_OUTPUTS_GETGRASSWEIGHT > 6
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default:
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OutColor = float4(0,0,0,0);
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break;
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}
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#endif // NUM_MATERIAL_OUTPUTS_GETGRASSWEIGHT > 2
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}
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#endif |