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Optimize probes count multiplication in DDGI shader

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This commit is contained in:
Wojtek Figat
2024-07-03 08:51:58 +02:00
parent 6fbf4a6aac
commit 00a9c48fec
2 changed files with 6 additions and 5 deletions
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4
Source/Engine/Renderer/GI/DynamicDiffuseGlobalIllumination.cpp
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@@ -46,7 +46,8 @@ GPU_CB_STRUCT(Data0 {
GlobalSignDistanceFieldPass::ConstantsData GlobalSDF;
GlobalSurfaceAtlasPass::ConstantsData GlobalSurfaceAtlas;
ShaderGBufferData GBuffer;
Float2 Padding0;
float Padding0;
uint32 ProbesCount;
float ResetBlend;
float TemporalTime;
Int4 ProbeScrollClears[4];
@@ -475,6 +476,7 @@ bool DynamicDiffuseGlobalIlluminationPass::RenderInner(RenderContext& renderCont
data.DDGI = ddgiData.Result.Constants;
data.GlobalSDF = bindingDataSDF.Constants;
data.GlobalSurfaceAtlas = bindingDataSurfaceAtlas.Constants;
data.ProbesCount = data.DDGI.ProbesCounts[0] * data.DDGI.ProbesCounts[1] * data.DDGI.ProbesCounts[2];
data.ResetBlend = clear ? 1.0f : 0.0f;
for (int32 cascadeIndex = 0; cascadeIndex < cascadesCount; cascadeIndex++)
{

7
Source/Shaders/GI/DDGI.shader
View File

@@ -30,7 +30,8 @@ DDGIData DDGI;
GlobalSDFData GlobalSDF;
GlobalSurfaceAtlasData GlobalSurfaceAtlas;
GBufferData GBuffer;
float2 Padding0;
float Padding0;
uint ProbesCount;
float ResetBlend;
float TemporalTime;
int4 ProbeScrollClears[4];
@@ -86,8 +87,7 @@ META_CS(true, FEATURE_LEVEL_SM5)
void CS_Classify(uint3 DispatchThreadId : SV_DispatchThreadID)
{
uint probeIndex = DispatchThreadId.x;
uint probesCount = DDGI.ProbesCounts.x * DDGI.ProbesCounts.y * DDGI.ProbesCounts.z;
if (probeIndex >= probesCount)
if (probeIndex >= ProbesCount)
return;
uint3 probeCoords = GetDDGIProbeCoords(DDGI, probeIndex);
probeIndex = GetDDGIScrollingProbeIndex(DDGI, CascadeIndex, probeCoords);
@@ -271,7 +271,6 @@ META_CS(true, FEATURE_LEVEL_SM5)
[numthreads(1, 1, 1)]
void CS_UpdateProbesInitArgs()
{
uint probesCount = DDGI.ProbesCounts.x * DDGI.ProbesCounts.y * DDGI.ProbesCounts.z;
uint activeProbesCount = ActiveProbes.Load(0);
uint arg = 0;
for (uint probesOffset = 0; probesOffset < activeProbesCount; probesOffset += DDGI_TRACE_RAYS_PROBES_COUNT_LIMIT)