bool FIndirectLightingCache::IndirectLightingAllowed(FScene* Scene, FSceneRenderer& Renderer) const
{
bool bAnyViewAllowsIndirectLightingCache = false;
if (IsIndirectLightingCacheAllowed(GetFeatureLevel()) && Scene->PrecomputedLightVolumes.Num() > 0)
{
for (int32 ViewIndex = 0; ViewIndex < Renderer.Views.Num(); ViewIndex++)
{
bAnyViewAllowsIndirectLightingCache |= (bool)Renderer.Views[ViewIndex].Family->EngineShowFlags.IndirectLightingCache;
}
}
return bAnyViewAllowsIndirectLightingCache;
}
void FPrimitiveSceneInfo::AddToScene(bool bUpdateStaticDrawLists)
{
check(IsInRenderingThread());
// If we are attaching a primitive that should be statically lit but has unbuilt lighting,
// Allocate space in the indirect lighting cache so that it can be used for previewing indirect lighting
if (Proxy->HasStaticLighting()
&& Proxy->NeedsUnbuiltPreviewLighting()
&& IsIndirectLightingCacheAllowed())
{
FIndirectLightingCacheAllocation* PrimitiveAllocation = Scene->IndirectLightingCache.FindPrimitiveAllocation(PrimitiveComponentId);
if (PrimitiveAllocation)
{
IndirectLightingCacheAllocation = PrimitiveAllocation;
PrimitiveAllocation->SetDirty();
}
else
{
PrimitiveAllocation = Scene->IndirectLightingCache.AllocatePrimitive(this, true);
PrimitiveAllocation->SetDirty();
IndirectLightingCacheAllocation = PrimitiveAllocation;
}
}
if (bUpdateStaticDrawLists)
{
AddStaticMeshes();
}
// create potential storage for our compact info
FPrimitiveSceneInfoCompact LocalCompactPrimitiveSceneInfo;
FPrimitiveSceneInfoCompact* CompactPrimitiveSceneInfo = &LocalCompactPrimitiveSceneInfo;
// if we are being added directly to the Octree, initialize the temp compact scene info,
// and let the Octree make a copy of it
LocalCompactPrimitiveSceneInfo.Init(this);
// Add the primitive to the octree.
check(!OctreeId.IsValidId());
Scene->PrimitiveOctree.AddElement(LocalCompactPrimitiveSceneInfo);
check(OctreeId.IsValidId());
// Set bounds.
FPrimitiveBounds& PrimitiveBounds = Scene->PrimitiveBounds[PackedIndex];
FBoxSphereBounds BoxSphereBounds = Proxy->GetBounds();
PrimitiveBounds.Origin = BoxSphereBounds.Origin;
PrimitiveBounds.SphereRadius = BoxSphereBounds.SphereRadius;
PrimitiveBounds.BoxExtent = BoxSphereBounds.BoxExtent;
PrimitiveBounds.MinDrawDistanceSq = FMath::Square(Proxy->GetMinDrawDistance());
PrimitiveBounds.MaxDrawDistance = Proxy->GetMaxDrawDistance();
// Store precomputed visibility ID.
int32 VisibilityBitIndex = Proxy->GetVisibilityId();
FPrimitiveVisibilityId& VisibilityId = Scene->PrimitiveVisibilityIds[PackedIndex];
VisibilityId.ByteIndex = VisibilityBitIndex / 8;
VisibilityId.BitMask = (1 << (VisibilityBitIndex & 0x7));
// Store occlusion flags.
uint8 OcclusionFlags = EOcclusionFlags::None;
if (Proxy->CanBeOccluded())
{
OcclusionFlags |= EOcclusionFlags::CanBeOccluded;
}
if (Proxy->AllowApproximateOcclusion()
// Allow approximate occlusion if attached, even if the parent does not have bLightAttachmentsAsGroup enabled
|| LightingAttachmentRoot.IsValid())
{
OcclusionFlags |= EOcclusionFlags::AllowApproximateOcclusion;
}
if (VisibilityBitIndex >= 0)
{
OcclusionFlags |= EOcclusionFlags::HasPrecomputedVisibility;
}
Scene->PrimitiveOcclusionFlags[PackedIndex] = OcclusionFlags;
// Store occlusion bounds.
FBoxSphereBounds OcclusionBounds = BoxSphereBounds;
if (Proxy->HasCustomOcclusionBounds())
{
OcclusionBounds = Proxy->GetCustomOcclusionBounds();
}
OcclusionBounds.BoxExtent.X = OcclusionBounds.BoxExtent.X + OCCLUSION_SLOP;
OcclusionBounds.BoxExtent.Y = OcclusionBounds.BoxExtent.Y + OCCLUSION_SLOP;
OcclusionBounds.BoxExtent.Z = OcclusionBounds.BoxExtent.Z + OCCLUSION_SLOP;
OcclusionBounds.SphereRadius = OcclusionBounds.SphereRadius + OCCLUSION_SLOP;
Scene->PrimitiveOcclusionBounds[PackedIndex] = OcclusionBounds;
// Store the component.
Scene->PrimitiveComponentIds[PackedIndex] = PrimitiveComponentId;
bNeedsCachedReflectionCaptureUpdate = true;
{
FMemMark MemStackMark(FMemStack::Get());
// Find lights that affect the primitive in the light octree.
for (FSceneLightOctree::TConstElementBoxIterator<SceneRenderingAllocator> LightIt(Scene->LightOctree, Proxy->GetBounds().GetBox());
LightIt.HasPendingElements();
LightIt.Advance())
{
const FLightSceneInfoCompact& LightSceneInfoCompact = LightIt.GetCurrentElement();
if (LightSceneInfoCompact.AffectsPrimitive(*CompactPrimitiveSceneInfo))
{
FLightPrimitiveInteraction::Create(LightSceneInfoCompact.LightSceneInfo,this);
}
}
}
INC_MEMORY_STAT_BY(STAT_PrimitiveInfoMemory, sizeof(*this) + StaticMeshes.GetAllocatedSize() + Proxy->GetMemoryFootprint());
}
void FIndirectLightingCache::UpdateCache(FScene* Scene, FSceneRenderer& Renderer, bool bAllowUnbuiltPreview)
{
if (IsIndirectLightingCacheAllowed())
{
bool bAnyViewAllowsIndirectLightingCache = false;
for (int32 ViewIndex = 0; ViewIndex < Renderer.Views.Num(); ViewIndex++)
{
bAnyViewAllowsIndirectLightingCache |= Renderer.Views[ViewIndex].Family->EngineShowFlags.IndirectLightingCache;
}
if (bAnyViewAllowsIndirectLightingCache)
{
SCOPE_CYCLE_COUNTER(STAT_UpdateIndirectLightingCache);
TMap<FIntVector, FBlockUpdateInfo> BlocksToUpdate;
TArray<FIndirectLightingCacheAllocation*> TransitionsOverTimeToUpdate;
if (bUpdateAllCacheEntries)
{
const uint32 PrimitiveCount = Scene->Primitives.Num();
for (uint32 PrimitiveIndex = 0; PrimitiveIndex < PrimitiveCount; ++PrimitiveIndex)
{
FPrimitiveSceneInfo* PrimitiveSceneInfo = Scene->Primitives[PrimitiveIndex];
UpdateCachePrimitive(Scene, PrimitiveSceneInfo, false, true, BlocksToUpdate, TransitionsOverTimeToUpdate);
}
}
// Go over the views and operate on any relevant visible primitives
for (int32 ViewIndex = 0; ViewIndex < Renderer.Views.Num(); ViewIndex++)
{
FViewInfo& View = Renderer.Views[ViewIndex];
if (!bUpdateAllCacheEntries)
{
for (FSceneSetBitIterator BitIt(View.PrimitiveVisibilityMap); BitIt; ++BitIt)
{
uint32 PrimitiveIndex = BitIt.GetIndex();
FPrimitiveSceneInfo* PrimitiveSceneInfo = Scene->Primitives[PrimitiveIndex];
const FPrimitiveViewRelevance& PrimitiveRelevance = View.PrimitiveViewRelevanceMap[PrimitiveIndex];
UpdateCachePrimitive(Scene, PrimitiveSceneInfo, bAllowUnbuiltPreview, PrimitiveRelevance.bOpaqueRelevance, BlocksToUpdate, TransitionsOverTimeToUpdate);
}
}
UpdateTranslucentVolumeCache(View, BlocksToUpdate, TransitionsOverTimeToUpdate);
}
UpdateBlocks(Scene, Renderer.Views.GetTypedData(), BlocksToUpdate);
UpdateTransitionsOverTime(TransitionsOverTimeToUpdate, Renderer.ViewFamily.DeltaWorldTime);
if (GCacheDrawLightingSamples || Renderer.ViewFamily.EngineShowFlags.VolumeLightingSamples || GCacheDrawDirectionalShadowing)
{
FViewElementPDI DebugPDI(Renderer.Views.GetTypedData(), NULL);
for (int32 VolumeIndex = 0; VolumeIndex < Scene->PrecomputedLightVolumes.Num(); VolumeIndex++)
{
const FPrecomputedLightVolume* PrecomputedLightVolume = Scene->PrecomputedLightVolumes[VolumeIndex];
PrecomputedLightVolume->DebugDrawSamples(&DebugPDI, GCacheDrawDirectionalShadowing != 0);
}
}
}
bUpdateAllCacheEntries = false;
}
}