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return valX * rcpPdfX; |
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} |
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#define SSS_ITER(i, n, kernel, profileID, shapeParam, centerPosUnSS, centerDepthVS, millimPerUnit, scaledPixPerMm, rcpDistScale, totalIrradiance, totalWeight) \ |
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{ \ |
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/* Everything except for the radius is a compile-time constant. */ \ |
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float r = kernel[profileID][i][0]; \ |
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float phi = TWO_PI * Fibonacci2d(i, n).y; \ |
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float2 vec = r * float2(cos(phi), sin(phi)); \ |
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\ |
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float2 position = centerPosUnSS + vec * scaledPixPerMm; \ |
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float rcpPdf = kernel[profileID][i][1]; \ |
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float depth = LOAD_TEXTURE2D(_MainDepthTexture, position).r; \ |
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float3 irradiance = LOAD_TEXTURE2D(_IrradianceSource, position).rgb; \ |
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\ |
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[flatten] \ |
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if (any(irradiance) == false) \ |
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{ \ |
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/*************************************************************************/ \ |
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/* The irradiance is 0. This could happen for 3 reasons. */ \ |
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/* Most likely, the surface fragment does not have an SSS material. */ \ |
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/* Alternatively, our sample comes from a region without any geometry. */ \ |
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/* Finally, the surface fragment could be completely shadowed. */ \ |
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/* Our blur is energy-preserving, so 'centerWeight' should be set to 0. */ \ |
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/* We do not terminate the loop since we want to gather the contribution */ \ |
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/* of the remaining samples (e.g. in case of hair covering skin). */ \ |
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/*************************************************************************/ \ |
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continue; \ |
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} \ |
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\ |
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/* Apply bilateral weighting. */ \ |
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float d = LinearEyeDepth(depth, _ZBufferParams); \ |
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float z = millimPerUnit * d - (millimPerUnit * centerDepthVS); \ |
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float3 w = ComputeBilateralWeight(shapeParam, r, z, rcpDistScale, rcpPdf); \ |
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\ |
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totalIrradiance += w * irradiance; \ |
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totalWeight += w; \ |
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#define SSS_ITER(i, n, kernel, profileID, shapeParam, centerPosUnSS, centerDepthVS, \ |
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millimPerUnit, scaledPixPerMm, rcpDistScale, totalIrradiance, totalWeight) \ |
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{ \ |
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/* Everything except for the radius is a compile-time constant. */ \ |
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float r = kernel[profileID][i][0]; \ |
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float phi = TWO_PI * Fibonacci2d(i, n).y; \ |
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float2 vec = r * float2(cos(phi), sin(phi)); \ |
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\ |
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float2 position = centerPosUnSS + vec * scaledPixPerMm; \ |
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float rcpPdf = kernel[profileID][i][1]; \ |
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float depth = LOAD_TEXTURE2D(_MainDepthTexture, position).r; \ |
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float3 irradiance = LOAD_TEXTURE2D(_IrradianceSource, position).rgb; \ |
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\ |
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[flatten] \ |
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if (any(irradiance) == false) \ |
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{ \ |
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/*************************************************************************/ \ |
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/* The irradiance is 0. This could happen for 3 reasons. */ \ |
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/* Most likely, the surface fragment does not have an SSS material. */ \ |
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/* Alternatively, our sample comes from a region without any geometry. */ \ |
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/* Finally, the surface fragment could be completely shadowed. */ \ |
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/* Our blur is energy-preserving, so 'centerWeight' should be set to 0. */ \ |
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/* We do not terminate the loop since we want to gather the contribution */ \ |
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/* of the remaining samples (e.g. in case of hair covering skin). */ \ |
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/*************************************************************************/ \ |
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continue; \ |
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} \ |
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\ |
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/* Apply bilateral weighting. */ \ |
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float d = LinearEyeDepth(depth, _ZBufferParams); \ |
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float z = millimPerUnit * d - (millimPerUnit * centerDepthVS); \ |
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float3 w = ComputeBilateralWeight(shapeParam, r, z, rcpDistScale, rcpPdf); \ |
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\ |
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totalIrradiance += w * irradiance; \ |
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totalWeight += w; \ |
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} |
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struct Attributes |
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Evgenii Golubev
8 年前