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Skip ddgi probes data preload to reduce memory wait time

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This commit is contained in:
Wojtek Figat
2024-06-03 22:29:00 +02:00
parent 1cbcddf410
commit 3c5d2f8b47
1 changed files with 1 additions and 12 deletions
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13
Source/Shaders/GI/DDGI.hlsl
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@@ -154,17 +154,6 @@ float3 SampleDDGIIrradiance(DDGIData data, Texture2D<snorm float4> probesData, T
return data.FallbackIrradiance;
uint3 baseProbeCoords = clamp(uint3((worldPosition - probesOrigin + probesExtent) / probesSpacing), uint3(0, 0, 0), data.ProbesCounts - uint3(1, 1, 1));
// Load probes state for this cascade
float4 probesDatas[8];
UNROLL
for (uint i = 0; i < 8; i++)
{
uint3 probeCoordsOffset = uint3(i, i >> 1, i >> 2) & 1;
uint3 probeCoords = clamp(baseProbeCoords + probeCoordsOffset, uint3(0, 0, 0), data.ProbesCounts - uint3(1, 1, 1));
uint probeIndex = GetDDGIScrollingProbeIndex(data, cascadeIndex, probeCoords);
probesDatas[i] = LoadDDGIProbeData(data, probesData, cascadeIndex, probeIndex);
}
// Bias the world-space position to reduce artifacts
float3 viewDir = normalize(data.ViewPos - worldPosition);
float3 surfaceBias = (worldNormal * 0.2f + viewDir * 0.8f) * (0.75f * probesSpacing * bias);
@@ -183,7 +172,7 @@ float3 SampleDDGIIrradiance(DDGIData data, Texture2D<snorm float4> probesData, T
uint probeIndex = GetDDGIScrollingProbeIndex(data, cascadeIndex, probeCoords);
// Load probe position and state
float4 probeData = probesDatas[i];
float4 probeData = LoadDDGIProbeData(data, probesData, cascadeIndex, probeIndex);
uint probeState = DecodeDDGIProbeState(probeData);
if (probeState == DDGI_PROBE_STATE_INACTIVE)
continue;