75 lines
3 KiB
HLSL
75 lines
3 KiB
HLSL
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#ifndef SUBSURFACE
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#define SUBSURFACE
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/*
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float _SSSThickness;
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half4 _SSSColor;
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float _SSSPointLightDirectionality;
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float _SSSNormalOffset;
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float _SSSStrength;
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float _SSSExponent;
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float _SSSNDotL;
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float _SSSConstant;
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#if defined(PROP_SSSTHICKNESSMAP) || !defined(OPTIMIZER_ENABLED)
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POI_TEXTURE_NOSAMPLER(_SSSThicknessMap);
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#endif
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half3 calculateSubsurfaceScattering(const float4 albedo)
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{
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#if defined(PROP_SSSTHICKNESSMAP) || !defined(OPTIMIZER_ENABLED)
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float thicknessMap = 1 - POI2D_SAMPLER_PAN(_SSSThicknessMap, _MainTex, poiMesh.uv[_SSSThicknessMapUV], _SSSThicknessMapPan);
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#else
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float thicknessMap = 1;
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#endif
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half4 translucencyColor = _SSSColor;
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float3 lightDir = poiLight.direction;
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#ifdef FORWARD_BASE_PASS
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half tLitDot = saturate(dot((poiLight.direction + poiMesh.normals[1] * _SSSNormalOffset), -poiCam.viewDir));
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#else
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float3 lightDirectional = normalize(_WorldSpaceLightPos0.xyz - poiCam.worldPos);
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lightDir = normalize(lerp(poiLight.direction, lightDirectional, _SSSPointLightDirectionality));
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half tLitDot = saturate(dot((poiLight.direction + poiMesh.normals[1] * _SSSNormalOffset), -poiCam.viewDir));
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#endif
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tLitDot = exp2(-_SSSExponent * (1 - tLitDot)) * _SSSStrength;
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float NDotL = abs(dot(poiLight.direction, poiMesh.normals[1]));
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tLitDot *= lerp(1, NDotL, _SSSNDotL);
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half translucencyOcclusion = lerp(1, thicknessMap, _SSSThickness);
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half translucencyAtten = (tLitDot + _SSSConstant * (NDotL + 0.1)) * translucencyOcclusion;
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return translucencyAtten * albedo.rgb * translucencyColor.rgb * poiLight.lightMap * poiLight.color;
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}
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*/
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float _SSSThicknessMod;
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float _SSSSCale;
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float _SSSPower;
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float _SSSDistortion;
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float4 _SSSColor;
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float _EnableSSS;
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#if defined(PROP_SSSTHICKNESSMAP) || !defined(OPTIMIZER_ENABLED)
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POI_TEXTURE_NOSAMPLER(_SSSThicknessMap);
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#endif
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float3 calculateSubsurfaceScattering()
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{
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#if defined(PROP_SSSTHICKNESSMAP) || !defined(OPTIMIZER_ENABLED)
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float SSS = 1 - POI2D_SAMPLER_PAN(_SSSThicknessMap, _MainTex, poiMesh.uv[_SSSThicknessMapUV], _SSSThicknessMapPan);
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#else
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float SSS = 1;
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#endif
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half3 vLTLight = poiLight.direction + poiMesh.normals[0] * _SSSDistortion;
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half flTDot = pow(saturate(dot(poiCam.viewDir, -vLTLight)), _SSSPower) * _SSSSCale;
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#ifdef FORWARD_BASE_PASS
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half3 fLT = (flTDot) * saturate(SSS + - 1 * _SSSThicknessMod);
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#else
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half3 fLT = poiLight.attenuation * (flTDot) * saturate(SSS + - 1 * _SSSThicknessMod);
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#endif
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return fLT * poiLight.color * _SSSColor * poiLight.attenuation;
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}
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#endif
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