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Refactor Global Surface Atlas to not rewrite objects data and use indirection for faster culling

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This commit is contained in:
Wojciech Figat
2022-06-27 16:07:54 +02:00
parent 282b9066b8
commit d8e79101e7
6 changed files with 80 additions and 79 deletions
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15
Source/Shaders/GI/DDGI.shader
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@@ -202,12 +202,13 @@ RWTexture2D<float4> RWProbesTrace : register(u0);
Texture3D<float> GlobalSDFTex : register(t0);
Texture3D<float> GlobalSDFMip : register(t1);
ByteAddressBuffer GlobalSurfaceAtlasChunks : register(t2);
Buffer<float4> GlobalSurfaceAtlasCulledObjects : register(t3);
Texture2D GlobalSurfaceAtlasDepth : register(t4);
Texture2D GlobalSurfaceAtlasTex : register(t5);
Texture2D<snorm float4> ProbesState : register(t6);
TextureCube Skybox : register(t7);
ByteAddressBuffer ActiveProbes : register(t8);
ByteAddressBuffer RWGlobalSurfaceAtlasCulledObjects : register(t3);
Buffer<float4> GlobalSurfaceAtlasObjects : register(t4);
Texture2D GlobalSurfaceAtlasDepth : register(t5);
Texture2D GlobalSurfaceAtlasTex : register(t6);
Texture2D<snorm float4> ProbesState : register(t7);
TextureCube Skybox : register(t8);
ByteAddressBuffer ActiveProbes : register(t9);
// Compute shader for tracing rays for probes using Global SDF and Global Surface Atlas.
META_CS(true, FEATURE_LEVEL_SM5)
@@ -248,7 +249,7 @@ void CS_TraceRays(uint3 DispatchThreadId : SV_DispatchThreadID)
// Sample Global Surface Atlas to get the lighting at the hit location
float3 hitPosition = hit.GetHitPosition(trace);
float surfaceThreshold = GetGlobalSurfaceAtlasThreshold(GlobalSDF, hit);
float4 surfaceColor = SampleGlobalSurfaceAtlas(GlobalSurfaceAtlas, GlobalSurfaceAtlasChunks, GlobalSurfaceAtlasCulledObjects, GlobalSurfaceAtlasDepth, GlobalSurfaceAtlasTex, hitPosition, -probeRayDirection, surfaceThreshold);
float4 surfaceColor = SampleGlobalSurfaceAtlas(GlobalSurfaceAtlas, GlobalSurfaceAtlasChunks, RWGlobalSurfaceAtlasCulledObjects, GlobalSurfaceAtlasObjects, GlobalSurfaceAtlasDepth, GlobalSurfaceAtlasTex, hitPosition, -probeRayDirection, surfaceThreshold);
radiance = float4(surfaceColor.rgb, hit.HitTime);
// Add some bias to prevent self occlusion artifacts in Chebyshev due to Global SDF being very incorrect in small scale