mirror of
https://github.com/muskit/H3VR-TNH-Quality-of-Life-Improvements.git
synced 2026-06-02 20:24:26 -07:00
msk
98 lines
2.9 KiB
HLSL
Vendored
98 lines
2.9 KiB
HLSL
Vendored
// 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 Distort.cginc
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/// @brief Forward distort pass vertex & fragment shaders.
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/////////////////////////////////////////////////////////////////////////////////
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#ifndef ALLOY_SHADERS_FORWARD_DISTORT_CGINC
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#define ALLOY_SHADERS_FORWARD_DISTORT_CGINC
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#define A_TEXEL_SIZE(a) a##_TexelSize
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#ifndef A_DISTORT_TEXTURE
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#define A_DISTORT_TEXTURE _GrabTexture
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#endif
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#define A_DISTORT_TEXTURE_TEXEL_SIZE A_TEXEL_SIZE(A_DISTORT_TEXTURE)
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#define A_BASE_PASS
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#define A_TESSELLATION_PASS
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#define A_INSTANCING_PASS
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#define A_STEREO_INSTANCING_PASS
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#define A_NORMAL_MAPPED_PASS
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#define A_PARALLAX_MAPPED_PASS
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#define A_VOLUMETRIC_PASS
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#define A_FORWARD_TEXCOORD0 float3 normalProjection : TEXCOORD0;
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#define A_FORWARD_TEXCOORD1 float4 grabUv : TEXCOORD1;
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#include "Assets/Alloy/Shaders/Framework/Forward.cginc"
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/// Grab texture containing copy of the back buffer.
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sampler2D A_DISTORT_TEXTURE;
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/// Grab texture dimension info.
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/// (x: 1 / width, y: 1 / height, z: width, w: height).
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float4 A_DISTORT_TEXTURE_TEXEL_SIZE;
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/// Weight of the distortion effect.
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/// Expects values in the range [0,1].
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float _DistortWeight;
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/// Strength of the distortion effect.
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/// Expects values in the range [0,128].
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float _DistortIntensity;
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/// Mesh normals influence on distortion.
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/// Expects values in the range [0,1].
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float _DistortGeoWeight;
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void aMainVertexShader(
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AVertexInput v,
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out AFragmentInput o,
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out float4 opos : SV_POSITION)
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{
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aForwardVertexShader(v, o, opos);
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o.normalProjection = mul((float3x3)UNITY_MATRIX_MVP, v.normal);
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// Until ComputeGrabScreenPos() is fixed, just directly pasted code here.
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#if UNITY_UV_STARTS_AT_TOP
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float scale = -1.0;
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#else
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float scale = 1.0;
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#endif
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o.grabUv.xy = (float2(opos.x, opos.y * scale) + opos.ww) * 0.5;
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o.grabUv.zw = opos.zw;
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}
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half4 aMainFragmentShader(
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AFragmentInput i
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A_FACING_SIGN_PARAM) : SV_Target
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{
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// Transfer instancing and stereo IDs.
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ASurface s = aForwardSurface(i, A_FACING_SIGN);
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// Adjust grab texture UVs and weight.
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i.grabUv.z = UNITY_Z_0_FAR_FROM_CLIPSPACE(i.grabUv.z);
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#if UNITY_SINGLE_PASS_STEREO
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i.grabUv.xy = TransformStereoScreenSpaceTex(i.grabUv.xy, i.grabUv.w);
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#endif
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// Mesh normals distortion.
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// cf http://wiki.unity3d.com/index.php?title=Refraction
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float3 bump = s.normalTangent + i.normalProjection * abs(i.normalProjection);
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float2 offset = A_DISTORT_TEXTURE_TEXEL_SIZE.xy * lerp(s.normalTangent, bump, _DistortGeoWeight).xy;
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i.grabUv.xy += offset * (i.grabUv.z * _DistortWeight * _DistortIntensity);
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// Sample and combine textures.
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half3 refr = tex2Dproj(A_DISTORT_TEXTURE, UNITY_PROJ_COORD(i.grabUv)).rgb;
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return aForwardColor(s, s.baseColor * refr);
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}
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#endif // ALLOY_SHADERS_FORWARD_DISTORT_CGINC
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