Library/PackageCache/com.unity.render-pipelines.core/ShaderLibrary/Sampling/SampleUVMapping.hlsl at master · tacstudios.tngl.sh/AloneGame

A game about forced loneliness, made by TACStudios
AloneGame / Library / PackageCache / com.unity.render-pipelines.core / ShaderLibrary / Sampling / SampleUVMapping.hlsl
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 1// This structure abstract uv mapping inside one struct.
 2// It represent a mapping of any uv (with its associated tangent space for derivative if SurfaceGradient mode) - UVSet0 to 4, planar, triplanar
 3
 4#ifndef __SAMPLEUVMAPPING_HLSL__
 5#define __SAMPLEUVMAPPING_HLSL__
 6
 7#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/NormalSurfaceGradient.hlsl"
 8
 9#define UV_MAPPING_UVSET 0
10#define UV_MAPPING_PLANAR 1
11#define UV_MAPPING_TRIPLANAR 2
12
13struct UVMapping
14{
15    int mappingType;
16    float2 uv;  // Current uv or planar uv
17
18    // Triplanar specific
19    float2 uvZY;
20    float2 uvXZ;
21    float2 uvXY;
22
23    float3 normalWS; // vertex normal
24    float3 triplanarWeights;
25
26#ifdef SURFACE_GRADIENT
27    // tangent basis to use when mappingType is UV_MAPPING_UVSET
28    // these are vertex level in world space
29    float3 tangentWS;
30    float3 bitangentWS;
31    // TODO: store also object normal map for object triplanar
32#endif
33};
34
35// Multiple includes of the file to handle all variations of textures sampling for regular, lod and bias
36
37// Regular sampling functions
38#define ADD_FUNC_SUFFIX(Name) Name
39#define SAMPLE_TEXTURE_FUNC(textureName, samplerName, uvMapping, unused) SAMPLE_TEXTURE2D(textureName, samplerName, uvMapping)
40#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Sampling/SampleUVMappingInternal.hlsl"
41#undef ADD_FUNC_SUFFIX
42#undef SAMPLE_TEXTURE_FUNC
43
44// Lod sampling functions
45#define ADD_FUNC_SUFFIX(Name) MERGE_NAME(Name, Lod)
46#define SAMPLE_TEXTURE_FUNC(textureName, samplerName, uvMapping, lod) SAMPLE_TEXTURE2D_LOD(textureName, samplerName, uvMapping, lod)
47#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Sampling/SampleUVMappingInternal.hlsl"
48#undef ADD_FUNC_SUFFIX
49#undef SAMPLE_TEXTURE_FUNC
50
51// Bias sampling functions
52#define ADD_FUNC_SUFFIX(Name) MERGE_NAME(Name, Bias)
53#define SAMPLE_TEXTURE_FUNC(textureName, samplerName, uvMapping, bias) SAMPLE_TEXTURE2D_BIAS(textureName, samplerName, uvMapping, bias)
54#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Sampling/SampleUVMappingInternal.hlsl"
55#undef ADD_FUNC_SUFFIX
56#undef SAMPLE_TEXTURE_FUNC
57
58// Macro to improve readibility of surface data
59#define SAMPLE_UVMAPPING_TEXTURE2D(textureName, samplerName, uvMapping)             SampleUVMapping(TEXTURE2D_ARGS(textureName, samplerName), uvMapping, 0.0) // Last 0.0 is unused
60#define SAMPLE_UVMAPPING_TEXTURE2D_LOD(textureName, samplerName, uvMapping, lod)    SampleUVMappingLod(TEXTURE2D_ARGS(textureName, samplerName), uvMapping, lod)
61#define SAMPLE_UVMAPPING_TEXTURE2D_BIAS(textureName, samplerName, uvMapping, bias)  SampleUVMappingBias(TEXTURE2D_ARGS(textureName, samplerName), uvMapping, bias)
62
63#define SAMPLE_UVMAPPING_NORMALMAP(textureName, samplerName, uvMapping, scale)              SampleUVMappingNormal(TEXTURE2D_ARGS(textureName, samplerName), uvMapping, scale, 0.0)
64#define SAMPLE_UVMAPPING_NORMALMAP_LOD(textureName, samplerName, uvMapping, scale, lod)     SampleUVMappingNormalLod(TEXTURE2D_ARGS(textureName, samplerName), uvMapping, scale, lod)
65#define SAMPLE_UVMAPPING_NORMALMAP_BIAS(textureName, samplerName, uvMapping, scale, bias)   SampleUVMappingNormalBias(TEXTURE2D_ARGS(textureName, samplerName), uvMapping, scale, bias)
66
67#define SAMPLE_UVMAPPING_NORMALMAP_AG(textureName, samplerName, uvMapping, scale)              SampleUVMappingNormalAG(TEXTURE2D_ARGS(textureName, samplerName), uvMapping, scale, 0.0)
68#define SAMPLE_UVMAPPING_NORMALMAP_AG_LOD(textureName, samplerName, uvMapping, scale, lod)     SampleUVMappingNormalAGLod(TEXTURE2D_ARGS(textureName, samplerName), uvMapping, scale, lod)
69#define SAMPLE_UVMAPPING_NORMALMAP_AG_BIAS(textureName, samplerName, uvMapping, scale, bias)   SampleUVMappingNormalAGBias(TEXTURE2D_ARGS(textureName, samplerName), uvMapping, scale, bias)
70
71#define SAMPLE_UVMAPPING_NORMALMAP_RGB(textureName, samplerName, uvMapping, scale)              SampleUVMappingNormalRGB(TEXTURE2D_ARGS(textureName, samplerName), uvMapping, scale, 0.0)
72#define SAMPLE_UVMAPPING_NORMALMAP_RGB_LOD(textureName, samplerName, uvMapping, scale, lod)     SampleUVMappingNormalRGBLod(TEXTURE2D_ARGS(textureName, samplerName), uvMapping, scale, lod)
73#define SAMPLE_UVMAPPING_NORMALMAP_RGB_BIAS(textureName, samplerName, uvMapping, scale, bias)   SampleUVMappingNormalRGBBias(TEXTURE2D_ARGS(textureName, samplerName), uvMapping, scale, bias)
74
75#endif //__SAMPLEUVMAPPING_HLSL__