20 lines
No EOL
763 B
HLSL
20 lines
No EOL
763 B
HLSL
/*
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contributors: Shadi El Hajj
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description: Classic Disney reparametrisation of roughness from Burley's paper "Physically Based Shading At Disney". Sébastien Lagarde's recommends clamping perceptual roughness to 0.045 in his paper "Moving Frostbite to PBR".
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use: <float> perceptual2linearRoughness(<float> perceptualRoughness)
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license: MIT License (MIT) Copyright (c) 2024 Shadi EL Hajj
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*/
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#ifndef MIN_PERCEPTUAL_ROUGHNESS
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#define MIN_PERCEPTUAL_ROUGHNESS 0.045
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#endif
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#ifndef FNC_PERCEPTUAL_LINEAR_ROUGHNESS
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#define FNC_PERCEPTUAL_LINEAR_ROUGHNESS
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float perceptual2linearRoughness(float perceptualRoughness) {
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perceptualRoughness = clamp(perceptualRoughness, MIN_PERCEPTUAL_ROUGHNESS, 1.0);
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return perceptualRoughness * perceptualRoughness;
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}
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#endif |