mirror of
https://github.com/muskit/H3VR-TNH-Quality-of-Life-Improvements.git
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68 lines
2.1 KiB
HLSL
68 lines
2.1 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 DirectionalBlend.cginc
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/// @brief Allows blending based how much a normal faces a given direction.
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/////////////////////////////////////////////////////////////////////////////////
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#ifndef ALLOY_SHADERS_FEATURE_DIRECTIONAL_BLEND_CGINC
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#define ALLOY_SHADERS_FEATURE_DIRECTIONAL_BLEND_CGINC
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#ifdef A_DIRECTIONAL_BLEND_ON
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#ifndef _DIRECTIONALBLENDMODE_WORLD
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#ifdef A_DIRECTIONAL_BLEND_MODE_OFF
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#define _DIRECTIONALBLENDMODE_WORLD
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#else
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#define A_WORLD_TO_OBJECT_ON
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#endif
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#endif
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#ifndef A_NORMAL_WORLD_ON
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#define A_NORMAL_WORLD_ON
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#endif
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#endif
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#include "Assets/Alloy/Shaders/Framework/Feature.cginc"
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#ifdef A_DIRECTIONAL_BLEND_ON
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/// Direction around which the blending occurs.
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/// Expects a normalized direction vector.
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half3 _DirectionalBlendDirection;
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/// Directional Blend weight.
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/// Expects values in the range [0,1].
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half _OrientedScale;
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/// Hemispherical cutoff where blend begins.
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/// Expects values in the range [0,1].
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half _OrientedCutoff;
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/// Offset from cutoff where smooth blending occurs.
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/// Expects values in the range [0.0001,1].
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half _OrientedBlend;
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/// Controls how much the vertex color alpha influences the cutoff.
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/// Expects values in the range [0,1].
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half _DirectionalBlendAlphaVertexTint;
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#endif
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void aDirectionalBlend(
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inout ASurface s)
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{
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#ifdef A_DIRECTIONAL_BLEND_ON
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#ifdef _DIRECTIONALBLENDMODE_WORLD
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half3 normal = s.normalWorld;
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#else
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half3 normal = UnityWorldToObjectDir(s.normalWorld);
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#endif
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// Convert [-1,1] -> [1,0] to flip direction for free.
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half mask = dot(normal, _DirectionalBlendDirection) * -0.5h + 0.5h;
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aBlendRangeMask(s, mask, _OrientedScale, _OrientedCutoff, _OrientedBlend, _DirectionalBlendAlphaVertexTint);
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#endif
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}
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#endif // ALLOY_SHADERS_FEATURE_DIRECTIONAL_BLEND_CGINC
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