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61 行
2.7 KiB
61 行
2.7 KiB
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// These functions are use to hide the handling of triplanar mapping
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// Normal need a specific treatment as they use special encoding for both base and detail map
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// Also we use multiple inclusion to handle the various variation for lod and bias
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// param can be unused, lod or bias
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real4 ADD_FUNC_SUFFIX(SampleUVMapping)(TEXTURE2D_PARAM(textureName, samplerName), UVMapping uvMapping, real param)
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{
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if (uvMapping.mappingType == UV_MAPPING_TRIPLANAR)
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{
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real3 triplanarWeights = uvMapping.triplanarWeights;
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real4 val = real4(0.0, 0.0, 0.0, 0.0);
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if (triplanarWeights.x > 0.0)
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val += triplanarWeights.x * SAMPLE_TEXTURE_FUNC(textureName, samplerName, uvMapping.uvZY, param);
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if (triplanarWeights.y > 0.0)
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val += triplanarWeights.y * SAMPLE_TEXTURE_FUNC(textureName, samplerName, uvMapping.uvXZ, param);
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if (triplanarWeights.z > 0.0)
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val += triplanarWeights.z * SAMPLE_TEXTURE_FUNC(textureName, samplerName, uvMapping.uvXY, param);
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return val;
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}
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else // UV_MAPPING_UVSET / UV_MAPPING_PLANAR
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{
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return SAMPLE_TEXTURE_FUNC(textureName, samplerName, uvMapping.uv, param);
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}
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}
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// Nested multiple includes of the file to handle all variations of normal map (AG, RG or RGB)
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// This version is use for the base normal map (BC5 or DXT5nm)
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#define ADD_NORMAL_FUNC_SUFFIX(Name) Name
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#if defined(UNITY_NO_DXT5nm)
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#define UNPACK_NORMAL_FUNC UnpackNormalRGB
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#define UNPACK_DERIVATIVE_FUNC UnpackDerivativeNormalRGB
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#else
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#define UNPACK_NORMAL_FUNC UnpackNormalmapRGorAG
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#define UNPACK_DERIVATIVE_FUNC UnpackDerivativeNormalRGorAG
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#endif
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#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Sampling/SampleUVMappingNormalInternal.hlsl"
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#undef ADD_NORMAL_FUNC_SUFFIX
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#undef UNPACK_NORMAL_FUNC
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#undef UNPACK_DERIVATIVE_FUNC
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// This version is for normalmap with AG encoding only. Use with details map encoded with others properties (like smoothness).
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#define ADD_NORMAL_FUNC_SUFFIX(Name) Name##AG
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#define UNPACK_NORMAL_FUNC UnpackNormalAG
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#define UNPACK_DERIVATIVE_FUNC UnpackDerivativeNormalAG
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#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Sampling/SampleUVMappingNormalInternal.hlsl"
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#undef ADD_NORMAL_FUNC_SUFFIX
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#undef UNPACK_NORMAL_FUNC
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#undef UNPACK_DERIVATIVE_FUNC
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// This version is for normalmap with RGB encoding only, i.e uncompress or BC7.
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#define ADD_NORMAL_FUNC_SUFFIX(Name) Name##RGB
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#define UNPACK_NORMAL_FUNC UnpackNormalRGB
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#define UNPACK_DERIVATIVE_FUNC UnpackDerivativeNormalRGB
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#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Sampling/SampleUVMappingNormalInternal.hlsl"
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#undef ADD_NORMAL_FUNC_SUFFIX
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#undef UNPACK_NORMAL_FUNC
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#undef UNPACK_DERIVATIVE_FUNC
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