87 lines
3.6 KiB
HLSL
87 lines
3.6 KiB
HLSL
float3 SampleSpecularBRDF(BSDFData bsdfData, float2 theSample, float3 viewWS)
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{
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float roughness = bsdfData.roughnessAT;
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float3x3 localToWorld;
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if (HasFlag(bsdfData.materialFeatures, MATERIALFEATUREFLAGS_STACK_LIT_ANISOTROPY))
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{
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localToWorld = float3x3(bsdfData.tangentWS, bsdfData.bitangentWS, bsdfData.normalWS);
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}
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else
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{
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localToWorld = GetLocalFrame(bsdfData.normalWS);
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}
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float NdotL, NdotH, VdotH;
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float3 sampleDir;
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SampleGGXDir(theSample, viewWS, localToWorld, roughness, sampleDir, NdotL, NdotH, VdotH);
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return sampleDir;
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}
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#ifdef HAS_LIGHTLOOP
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IndirectLighting EvaluateBSDF_RaytracedReflection(LightLoopContext lightLoopContext,
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BSDFData bsdfData,
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PreLightData preLightData,
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float3 reflection)
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{
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IndirectLighting lighting;
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ZERO_INITIALIZE(IndirectLighting, lighting);
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float3 reflectanceFactor = (float3)0.0;
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if (IsVLayeredEnabled(bsdfData))
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{
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reflectanceFactor = preLightData.specularFGD[COAT_LOBE_IDX];
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reflectanceFactor *= preLightData.hemiSpecularOcclusion[COAT_LOBE_IDX];
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// TODOENERGY: If vlayered, should be done in ComputeAdding with FGD formulation for non dirac lights.
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// Incorrect, but for now:
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reflectanceFactor *= preLightData.energyCompensationFactor[COAT_LOBE_IDX];
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}
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else
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{
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for(int i = 0; i < TOTAL_NB_LOBES; i++)
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{
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float3 lobeFactor = preLightData.specularFGD[i]; // note: includes the lobeMix factor, see PreLightData.
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lobeFactor *= preLightData.hemiSpecularOcclusion[i];
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// TODOENERGY: If vlayered, should be done in ComputeAdding with FGD formulation for non dirac lights.
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// Incorrect, but for now:
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lobeFactor *= preLightData.energyCompensationFactor[i];
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reflectanceFactor += lobeFactor;
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}
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}
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lighting.specularReflected = reflection.rgb * reflectanceFactor;
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return lighting;
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}
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IndirectLighting EvaluateBSDF_RaytracedRefraction(LightLoopContext lightLoopContext,
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PreLightData preLightData,
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float3 transmittedColor)
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{
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IndirectLighting lighting;
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ZERO_INITIALIZE(IndirectLighting, lighting);
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return lighting;
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}
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float RecursiveRenderingReflectionPerceptualSmoothness(BSDFData bsdfData)
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{
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return PerceptualRoughnessToPerceptualSmoothness(bsdfData.perceptualRoughnessB);
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}
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#endif
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#if (SHADERPASS == SHADERPASS_RAYTRACING_GBUFFER)
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void FitToStandardLit( SurfaceData surfaceData
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, BuiltinData builtinData
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, uint2 positionSS
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, out StandardBSDFData outStandardlit)
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{
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outStandardlit.baseColor = surfaceData.baseColor;
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outStandardlit.specularOcclusion = surfaceData.specularOcclusionCustomInput;
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outStandardlit.normalWS = surfaceData.normalWS;
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outStandardlit.perceptualRoughness = PerceptualSmoothnessToPerceptualRoughness(surfaceData.perceptualSmoothnessA);
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outStandardlit.fresnel0 = HasFlag(surfaceData.materialFeatures, MATERIALFEATUREFLAGS_STACK_LIT_SPECULAR_COLOR) ? surfaceData.specularColor : ComputeFresnel0(surfaceData.baseColor, surfaceData.metallic, IorToFresnel0(surfaceData.dielectricIor));
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outStandardlit.coatMask = surfaceData.coatMask;
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outStandardlit.emissiveAndBaked = builtinData.bakeDiffuseLighting * surfaceData.ambientOcclusion + builtinData.emissiveColor;
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outStandardlit.isUnlit = 0;
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}
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#endif
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