void FLightSceneInfo::AddToScene()
{
const FLightSceneInfoCompact& LightSceneInfoCompact = Scene->Lights[Id];
// Only need to create light interactions for lights that can cast a shadow,
// As deferred shading doesn't need to know anything about the primitives that a light affects
if (Proxy->CastsDynamicShadow()
|| Proxy->CastsStaticShadow()
// Lights that should be baked need to check for interactions to track unbuilt state correctly
|| Proxy->HasStaticLighting()
// ES2 path supports dynamic point lights in the base pass using forward rendering, so we need to know the primitives
|| (Scene->GetFeatureLevel() < ERHIFeatureLevel::SM4 && Proxy->GetLightType() == LightType_Point && Proxy->IsMovable()))
{
// Add the light to the scene's light octree.
Scene->LightOctree.AddElement(LightSceneInfoCompact);
// TODO: Special case directional lights, no need to traverse the octree.
// Find primitives that the light affects in the primitive octree.
FMemMark MemStackMark(FMemStack::Get());
for(FScenePrimitiveOctree::TConstElementBoxIterator<SceneRenderingAllocator> PrimitiveIt(
Scene->PrimitiveOctree,
GetBoundingBox()
);
PrimitiveIt.HasPendingElements();
PrimitiveIt.Advance())
{
CreateLightPrimitiveInteraction(LightSceneInfoCompact, PrimitiveIt.GetCurrentElement());
}
}
}
void FSceneViewState::TrimOcclusionHistory(FRHICommandListImmediate& RHICmdList, float CurrentTime, float MinHistoryTime, float MinQueryTime, int32 FrameNumber)
{
// Only trim every few frames, since stale entries won't cause problems
if (FrameNumber % 6 == 0)
{
int32 NumBufferedFrames = FOcclusionQueryHelpers::GetNumBufferedFrames();
for(TSet<FPrimitiveOcclusionHistory,FPrimitiveOcclusionHistoryKeyFuncs>::TIterator PrimitiveIt(PrimitiveOcclusionHistorySet);
PrimitiveIt;
++PrimitiveIt
)
{
// If the primitive has an old pending occlusion query, release it.
if(PrimitiveIt->LastConsideredTime < MinQueryTime)
{
PrimitiveIt->ReleaseQueries(RHICmdList, OcclusionQueryPool, NumBufferedFrames);
}
// If the primitive hasn't been considered for visibility recently, remove its history from the set.
if (PrimitiveIt->LastConsideredTime < MinHistoryTime || PrimitiveIt->LastConsideredTime > CurrentTime)
{
PrimitiveIt.RemoveCurrent();
}
}
}
}
