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