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31 lines
1.5 KiB
31 lines
1.5 KiB
#include "Packages/com.unity.render-pipelines.high-definition/Runtime/Material/MaterialGBufferMacros.hlsl"
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// Performs fading at the edge of the screen.
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float EdgeOfScreenFade(float2 coordNDC, float fadeRcpLength)
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{
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float2 coordCS = coordNDC * 2 - 1;
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float2 t = Remap10(abs(coordCS), fadeRcpLength, fadeRcpLength);
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return Smoothstep01(t.x) * Smoothstep01(t.y);
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}
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// Coat mask is 5 bits for most material types
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// But it's 4 bit for transmission, and unavailable for colored transmission
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float UnpackCoatMask(float4 inGBuffer2)
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{
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uint coatAndMode = UnpackByte(inGBuffer2.a);
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uint materialFeatureId = coatAndMode & 0x7;
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bool hasTransmissionTint = coatAndMode & 0x8;
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bool translucent = materialFeatureId == GBUFFER_LIT_TRANSMISSION;
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return translucent ? (hasTransmissionTint ? 0.0 : UnpackUIntToFloat(coatAndMode, 4, 4)) : UnpackUIntToFloat(coatAndMode, 3, 5);
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}
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// Function that unpacks and evaluates the clear coat mask
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// packedMask must be the value of GBuffer2 alpha.
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// Caution: This need to be in sync with Lit.hlsl code
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bool HasClearCoatMask(float4 packedMask)
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{
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// We use a texture to identify if we use a clear coat constant for perceptualRoughness for SSR or use value from normal buffer.
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// When we use a forward material we can output the normal and perceptualRoughness for the coat for SSR, so we simply bind a black 1x1 texture
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// When we use deferred material we need to bind the gbuffer2 and read the coat mask
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return UnpackCoatMask(packedMask) > 0.001;// If coat mask is positive, it mean we use clear coat
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}
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