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28 lines
790 B
Plaintext
28 lines
790 B
Plaintext
// Copyright Epic Games, Inc. All Rights Reserved.
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/*=============================================================================
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DistanceFieldDownsampling.usf
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=============================================================================*/
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#include "Common.ush"
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float3 TexelSrcSize;
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uint4 DstSize;
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uint4 OffsetInAtlas;
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SamplerState MeshDFSampler;
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Texture3D<float> MeshDF;
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RWTexture3D<float> DFAtlas;
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[numthreads(8,8,1)]
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void DistanceFieldDownsamplingCS(uint3 ThreadId : SV_DispatchThreadID)
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{
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if (all(ThreadId.xyz < DstSize.xyz))
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{
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float3 VolumeUV = float3(ThreadId.xyz) / float3(DstSize.xyz);
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VolumeUV += TexelSrcSize;
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int3 TexturePixelOffset = ThreadId.xyz + (int3)OffsetInAtlas.xyz;
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DFAtlas[TexturePixelOffset] = MeshDF.SampleLevel(MeshDFSampler, VolumeUV, 0).x;
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}
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}
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