GoaLitiuM/FlaxEngine
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Minor sdf imporvements

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This commit is contained in:
Wojtek Figat
2024-05-24 12:41:39 +02:00
parent 7c83481d6f
commit f326fa611f
3 changed files with 17 additions and 19 deletions
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2
Source/Shaders/GI/DDGI.hlsl
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@@ -213,11 +213,11 @@ float3 SampleDDGIIrradiance(DDGIData data, Texture2D<snorm float4> probesData, T
float2 uv = GetDDGIProbeUV(data, cascadeIndex, probeIndex, octahedralCoords, DDGI_PROBE_RESOLUTION_DISTANCE);
float2 probeDistance = probesDistance.SampleLevel(SamplerLinearClamp, uv, 0).rg * 2.0f;
float probeDistanceMean = probeDistance.x;
float probeDistanceMean2 = probeDistance.y;
// Visibility weight (Chebyshev)
if (biasedPosToProbeDist > probeDistanceMean)
{
float probeDistanceMean2 = probeDistance.y;
float probeDistanceVariance = abs(Square(probeDistanceMean) - probeDistanceMean2);
float chebyshevWeight = probeDistanceVariance / (probeDistanceVariance + Square(biasedPosToProbeDist - probeDistanceMean));
weight *= max(chebyshevWeight * chebyshevWeight * chebyshevWeight, 0.05f);

5
Source/Shaders/GlobalSignDistanceField.hlsl
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@@ -223,7 +223,6 @@ GlobalSDFHit RayTraceGlobalSDF(const GlobalSDFData data, Texture3D<float> tex, T
float4 cascadePosDistance = data.CascadePosDistance[cascade];
float voxelSize = data.CascadeVoxelSize[cascade];
float voxelExtent = voxelSize * 0.5f;
float cascadeMinStep = voxelSize;
float3 worldPosition = trace.WorldPosition + trace.WorldDirection * (voxelSize * cascadeTraceStartBias);
// Hit the cascade bounds to find the intersection points
@@ -270,7 +269,7 @@ GlobalSDFHit RayTraceGlobalSDF(const GlobalSDFData data, Texture3D<float> tex, T
stepDistance *= cascadeMaxDistance;
// Detect surface hit
float minSurfaceThickness = voxelExtent * saturate(stepTime / (voxelExtent * 2.0f));
float minSurfaceThickness = voxelExtent * saturate(stepTime / voxelSize);
if (stepDistance < minSurfaceThickness)
{
// Surface hit
@@ -293,7 +292,7 @@ GlobalSDFHit RayTraceGlobalSDF(const GlobalSDFData data, Texture3D<float> tex, T
}
// Move forward
stepTime += max(stepDistance * trace.StepScale, cascadeMinStep);
stepTime += max(stepDistance * trace.StepScale, voxelSize);
}
hit.StepsCount += step;
}