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- void PseudoSubsurface_half (half3 WorldPosition, half3 WorldNormal, half SSRadius, half ShadowResponse, out half3 ssAmount)
- {
-
- #ifdef SHADERGRAPH_PREVIEW
- half3 color = half3(0,0,0);
- half atten = 1;
- half3 dir = half3 (0.707, 0, 0.707);
-
- #else
- #if defined(UNIVERSAL_PIPELINE_CORE_INCLUDED)
- half4 shadowCoord = TransformWorldToShadowCoord(WorldPosition);
- Light mainLight = GetMainLight(shadowCoord);
- half3 color = mainLight.color;
- half atten = mainLight.shadowAttenuation;
- half3 dir = mainLight.direction;
- #else
- half3 color = half3(0, 0, 0);
- half atten = 1;
- half3 dir = half3 (0.707, 0, 0.707);
- #endif
-
- #endif
-
- half NdotL = dot(WorldNormal, -1 * dir);
- half alpha = SSRadius;
- half theta_m = acos(-alpha); // boundary of the lighting function
-
- half theta = max(0, NdotL + alpha) - alpha;
- half normalizer = (2 + alpha) / (2 * (1 + alpha));
- half wrapped = (pow(abs((theta + alpha) / (1 + alpha)), 1 + alpha)) * normalizer;
- half shadow = lerp (1, atten, ShadowResponse);
- ssAmount = abs(color * shadow * wrapped);
-
- }
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