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64 lines
3.1 KiB
64 lines
3.1 KiB
void BuildSurfaceData(FragInputs fragInputs, inout SurfaceDescription surfaceDescription, float3 V, PositionInputs posInput, out SurfaceData surfaceData)
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{
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// setup defaults -- these are used if the graph doesn't output a value
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ZERO_INITIALIZE(SurfaceData, surfaceData);
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// copy across graph values, if defined
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$SurfaceDescription.BaseColor: surfaceData.color = surfaceDescription.BaseColor;
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#ifdef WRITE_NORMAL_BUFFER
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// When we need to export the normal (in the depth prepass, we write the geometry one)
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surfaceData.normalWS = fragInputs.tangentToWorld[2];
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#endif
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#if defined(DEBUG_DISPLAY)
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#if !defined(SHADER_STAGE_RAY_TRACING)
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// Mipmap mode debugging isn't supported with ray tracing as it relies on derivatives
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if (_DebugMipMapMode != DEBUGMIPMAPMODE_NONE)
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{
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#ifdef FRAG_INPUTS_USE_TEXCOORD0
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surfaceData.color = GET_TEXTURE_STREAMING_DEBUG(posInput.positionSS, fragInputs.texCoord0);
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#else
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surfaceData.color = GET_TEXTURE_STREAMING_DEBUG_NO_UV(posInput.positionSS);
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#endif
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}
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#endif
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#endif
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#ifdef _ENABLE_SHADOW_MATTE
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#if (SHADERPASS == SHADERPASS_FORWARD_UNLIT) || (SHADERPASS == SHADERPASS_RAYTRACING_GBUFFER) || (SHADERPASS == SHADERPASS_RAYTRACING_INDIRECT) || (SHADERPASS == SHADERPASS_RAYTRACING_FORWARD)
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HDShadowContext shadowContext = InitShadowContext();
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// Evaluate the shadow, the normal is guaranteed if shadow matte is enabled on this shader.
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float3 shadow3;
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ShadowLoopMin(shadowContext, posInput, normalize(fragInputs.tangentToWorld[2]), asuint(_ShadowMatteFilter), GetMeshRenderingLayerMask(), shadow3);
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// Compute the average value in the fourth channel
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float4 shadow = float4(shadow3, dot(shadow3, float3(1.0/3.0, 1.0/3.0, 1.0/3.0)));
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float4 shadowColor = (1.0 - shadow) * surfaceDescription.ShadowTint.rgba;
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float localAlpha = saturate(shadowColor.a + surfaceDescription.Alpha);
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// Keep the nested lerp
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// With no Color (bsdfData.color.rgb, bsdfData.color.a == 0.0f), just use ShadowColor*Color to avoid a ring of "white" around the shadow
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// And mix color to consider the Color & ShadowColor alpha (from texture or/and color picker)
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#ifdef _SURFACE_TYPE_TRANSPARENT
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surfaceData.color = lerp(shadowColor.rgb * surfaceData.color, lerp(lerp(shadowColor.rgb, surfaceData.color, 1.0 - surfaceDescription.ShadowTint.a), surfaceData.color, shadow.rgb), surfaceDescription.Alpha);
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#else
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surfaceData.color = lerp(lerp(shadowColor.rgb, surfaceData.color, 1.0 - surfaceDescription.ShadowTint.a), surfaceData.color, shadow.rgb);
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#endif
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localAlpha = ApplyBlendMode(surfaceData.color, localAlpha).a;
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surfaceDescription.Alpha = localAlpha;
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#elif SHADERPASS == SHADERPASS_PATH_TRACING
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surfaceData.normalWS = fragInputs.tangentToWorld[2];
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surfaceData.shadowTint = surfaceDescription.ShadowTint.rgba;
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#endif
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#endif // _ENABLE_SHADOW_MATTE
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}
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