mirror of
https://github.com/muskit/H3VR-TNH-Quality-of-Life-Improvements.git
synced 2026-06-03 04:34:26 -07:00
56 lines
1.6 KiB
HLSL
56 lines
1.6 KiB
HLSL
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// Alloy Physical Shader Framework
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// Copyright 2013-2017 RUST LLC.
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// http://www.alloy.rustltd.com/
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/////////////////////////////////////////////////////////////////////////////////
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/// @file Decal.cginc
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/// @brief Handles vertex-weighted alpha-blended decals.
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/////////////////////////////////////////////////////////////////////////////////
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#ifndef ALLOY_SHADERS_FEATURE_DECAL_CGINC
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#define ALLOY_SHADERS_FEATURE_DECAL_CGINC
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#if !defined(A_DECAL_ON) && defined(_DECAL_ON)
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#define A_DECAL_ON
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#endif
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#include "Assets/Alloy/Shaders/Framework/Feature.cginc"
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#ifdef A_DECAL_ON
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/// The decal tint color.
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/// Expects a linear LDR color with alpha.
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half4 _DecalColor;
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/// Decal texture.
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/// Expects an RGBA map with sRGB sampling.
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A_SAMPLER_2D(_DecalTex);
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/// Weight of the decal effect.
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/// Expects values in the range [0,1].
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half _DecalWeight;
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/// The specularity that will be applied over the decal.
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/// Expects values in the range [0,1].
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half _DecalSpecularity;
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/// Toggles tinting the decal alpha by the vertex alpha.
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/// Expects values in the range [0,1].
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half _DecalAlphaVertexTint;
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#endif
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void aDecal(
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inout ASurface s)
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{
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#ifdef A_DECAL_ON
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float2 detailUv = A_TEX_TRANSFORM_UV(s, _DecalTex);
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half4 decal = _DecalColor * tex2D(_DecalTex, detailUv);
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half weight = s.mask * _DecalWeight * decal.a * aLerpOneTo(s.vertexColor.a, _DecalAlphaVertexTint);
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s.baseColor = lerp(s.baseColor, decal.rgb, weight);
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s.metallic *= 1.0h - weight;
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s.specularity = lerp(s.specularity, _DecalSpecularity, weight);
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#endif
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}
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#endif // ALLOY_SHADERS_FEATURE_DECAL_CGINC
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