62 lines
1.9 KiB
HLSL
62 lines
1.9 KiB
HLSL
void CTI_SimpleTranslucentLighting_half(
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float3 PositionWS,
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half3 NormalWS,
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half3 TangentWS,
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half3 BitangentWS,
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half3 Albedo,
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half3 NormalTS,
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half3 Transmission,
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half TransmissionMask,
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half Occlusion,
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out half3 o_NormalWS,
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out half3 o_Transmission
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)
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{
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#ifdef SHADERGRAPH_PREVIEW
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o_NormalWS = half3(0,1,0);
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o_Transmission = 0;
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#else
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half3 translucency = 1;
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half3 viewDirWS = GetWorldSpaceNormalizeViewDir(PositionWS);
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half3x3 tangentToWorld = half3x3(TangentWS, BitangentWS, NormalWS);
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o_NormalWS = NormalizeNormalPerPixel(TransformTangentToWorld(NormalTS, tangentToWorld));
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half4 shadowCoord = TransformWorldToShadowCoord(PositionWS);
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Light mainLight = GetMainLight(shadowCoord);
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half w = 0.3; // 0.4
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half NdotL = saturate((dot(o_NormalWS, mainLight.direction) + w) / ((1 + w) * (1 + w)));
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half3 transLightDir = mainLight.direction + o_NormalWS * Transmission.z;
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half transDot = dot( transLightDir, -viewDirWS );
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transDot = exp2(saturate(transDot) * Transmission.y - Transmission.y);
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o_Transmission = transDot * (1.0 - NdotL) * mainLight.color * mainLight.shadowAttenuation * Transmission.x;
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if(_AmbientTranslucency > 0)
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{
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o_Transmission += SampleSH(-o_NormalWS) * _AmbientTranslucency * Occlusion;
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}
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o_Transmission *= Albedo * TransmissionMask;
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#endif
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}
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void SampleSH(half3 normalWS, out half3 Ambient)
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{
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// LPPV is not supported in Ligthweight Pipeline
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real4 SHCoefficients[7];
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SHCoefficients[0] = unity_SHAr;
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SHCoefficients[1] = unity_SHAg;
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SHCoefficients[2] = unity_SHAb;
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SHCoefficients[3] = unity_SHBr;
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SHCoefficients[4] = unity_SHBg;
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SHCoefficients[5] = unity_SHBb;
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SHCoefficients[6] = unity_SHC;
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Ambient = max(half3(0, 0, 0), SampleSH9(SHCoefficients, normalWS));
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} |