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59065aca8d
Setting this can allow us to take the optimized path on nanite. [CL 28890104 by jeremy moore in ue5-main branch]
469 lines
19 KiB
C++
469 lines
19 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "GeometryCollection/GeometryCollectionISMPoolComponent.h"
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#include "Components/HierarchicalInstancedStaticMeshComponent.h"
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#include "Engine/CollisionProfile.h"
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#include "Engine/StaticMesh.h"
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#include "GeometryCollection/GeometryCollectionComponent.h"
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#include UE_INLINE_GENERATED_CPP_BY_NAME(GeometryCollectionISMPoolComponent)
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// Use the FreeLists to enable recycling of ISM components.
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// Might want to add a Tick function to keep the pool at a stable value over time.
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// We would always want some spare components for fast allocation, but want to clean up when numbers get too high.
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static bool GUseComponentFreeList = true;
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FAutoConsoleVariableRef CVarISMPoolUseComponentFreeList(
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TEXT("r.ISMPool.UseComponentFreeList"),
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GUseComponentFreeList,
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TEXT("Recycle ISM components in the ISMPool."));
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static int32 GComponentFreeListTargetSize = 50;
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FAutoConsoleVariableRef CVarISMPoolComponentFreeListTargetSize(
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TEXT("r.ISMPool.ComponentFreeListTargetSize"),
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GComponentFreeListTargetSize,
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TEXT("Target size for number of ISM components in the ISMPool."));
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FGeometryCollectionMeshGroup::FMeshId FGeometryCollectionMeshGroup::AddMesh(const FGeometryCollectionStaticMeshInstance& MeshInstance, int32 InstanceCount, const FGeometryCollectionMeshInfo& ISMInstanceInfo)
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{
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const FMeshId MeshInfoIndex = MeshInfos.Emplace(ISMInstanceInfo);
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return MeshInfoIndex;
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}
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bool FGeometryCollectionMeshGroup::BatchUpdateInstancesTransforms(FGeometryCollectionISMPool& ISMPool, FMeshId MeshId, int32 StartInstanceIndex, TArrayView<const FTransform> NewInstancesTransforms, bool bWorldSpace, bool bMarkRenderStateDirty, bool bTeleport)
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{
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if (MeshInfos.IsValidIndex(MeshId))
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{
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return ISMPool.BatchUpdateInstancesTransforms(MeshInfos[MeshId], StartInstanceIndex, NewInstancesTransforms, bWorldSpace, bMarkRenderStateDirty, bTeleport, bAllowPerInstanceRemoval);
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}
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UE_LOG(LogChaos, Warning, TEXT("UGeometryCollectionISMPoolComponent : Invalid mesh Id (%d) for this mesh group"), MeshId);
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return false;
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}
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void FGeometryCollectionMeshGroup::BatchUpdateInstanceCustomData(FGeometryCollectionISMPool& ISMPool, int32 CustomFloatIndex, float CustomFloatValue)
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{
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for (const FGeometryCollectionMeshInfo& MeshInfo : MeshInfos)
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{
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ISMPool.BatchUpdateInstanceCustomData(MeshInfo, CustomFloatIndex, CustomFloatValue);
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}
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}
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void FGeometryCollectionMeshGroup::RemoveAllMeshes(FGeometryCollectionISMPool& ISMPool)
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{
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for (const FGeometryCollectionMeshInfo& MeshInfo: MeshInfos)
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{
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ISMPool.RemoveISM(MeshInfo);
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}
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MeshInfos.Empty();
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}
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void FGeometryCollectionISM::CreateISM(AActor* InOwningActor)
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{
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check(InOwningActor);
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ISMComponent = NewObject<UInstancedStaticMeshComponent>(InOwningActor, NAME_None, RF_Transient | RF_DuplicateTransient);
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ISMComponent->SetRemoveSwap();
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ISMComponent->SetCanEverAffectNavigation(false);
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ISMComponent->SetCollisionEnabled(ECollisionEnabled::NoCollision);
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ISMComponent->SetupAttachment(InOwningActor->GetRootComponent());
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InOwningActor->AddInstanceComponent(ISMComponent);
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ISMComponent->RegisterComponent();
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}
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void FGeometryCollectionISM::InitISM(const FGeometryCollectionStaticMeshInstance& InMeshInstance)
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{
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MeshInstance = InMeshInstance;
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check(MeshInstance.StaticMesh);
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check(ISMComponent != nullptr);
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#if WITH_EDITOR
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const FName ISMName = MakeUniqueObjectName(ISMComponent->GetOwner(), UInstancedStaticMeshComponent::StaticClass(), InMeshInstance.StaticMesh->GetFName());
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const FString ISMNameString = ISMName.ToString();
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ISMComponent->Rename(*ISMNameString);
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#endif
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ISMComponent->SetStaticMesh(MeshInstance.StaticMesh);
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ISMComponent->SetMobility((MeshInstance.Desc.Flags & FISMComponentDescription::StaticMobility) != 0 ? EComponentMobility::Static : EComponentMobility::Movable);
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ISMComponent->EmptyOverrideMaterials();
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for (int32 MaterialIndex = 0; MaterialIndex < MeshInstance.MaterialsOverrides.Num(); MaterialIndex++)
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{
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ISMComponent->SetMaterial(MaterialIndex, MeshInstance.MaterialsOverrides[MaterialIndex]);
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}
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ISMComponent->NumCustomDataFloats = MeshInstance.Desc.NumCustomDataFloats;
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for (int32 DataIndex = 0; DataIndex < MeshInstance.CustomPrimitiveData.Num(); DataIndex++)
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{
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ISMComponent->SetDefaultCustomPrimitiveDataFloat(DataIndex, MeshInstance.CustomPrimitiveData[DataIndex]);
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}
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const bool bReverseCulling = (MeshInstance.Desc.Flags & FISMComponentDescription::ReverseCulling) != 0;
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// Instead of reverse culling we put the mirror in the component transform so that PRIMITIVE_SCENE_DATA_FLAG_DETERMINANT_SIGN will be set for use by materials.
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//ISMComponent->SetReverseCulling(bReverseCulling);
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const FVector Scale = bReverseCulling ? FVector(-1, 1, 1) : FVector(1, 1, 1);
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const FTransform NewRelativeTransform(FQuat::Identity, MeshInstance.Desc.Position, Scale);
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if (!ISMComponent->GetRelativeTransform().Equals(NewRelativeTransform))
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{
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ISMComponent->SetRelativeTransform(FTransform(FQuat::Identity, MeshInstance.Desc.Position, Scale));
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}
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if ((MeshInstance.Desc.Flags & FISMComponentDescription::DistanceCullPrimitive) != 0)
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{
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ISMComponent->SetCachedMaxDrawDistance(MeshInstance.Desc.EndCullDistance);
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}
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ISMComponent->SetCullDistances(MeshInstance.Desc.StartCullDistance, MeshInstance.Desc.EndCullDistance);
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ISMComponent->SetCastShadow((MeshInstance.Desc.Flags & FISMComponentDescription::AffectShadow) != 0);
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ISMComponent->bAffectDynamicIndirectLighting = (MeshInstance.Desc.Flags & FISMComponentDescription::AffectDynamicIndirectLighting) != 0;
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ISMComponent->bAffectDistanceFieldLighting = (MeshInstance.Desc.Flags & FISMComponentDescription::AffectDistanceFieldLighting) != 0;
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ISMComponent->bWorldPositionOffsetWritesVelocity = (MeshInstance.Desc.Flags & FISMComponentDescription::WorldPositionOffsetWritesVelocity) != 0;
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ISMComponent->bEvaluateWorldPositionOffset = (MeshInstance.Desc.Flags & FISMComponentDescription::EvaluateWorldPositionOffset) != 0;
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ISMComponent->bUseGpuLodSelection = (MeshInstance.Desc.Flags & FISMComponentDescription::GpuLodSelection) != 0;
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ISMComponent->bOverrideMinLOD = MeshInstance.Desc.MinLod > 0;
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ISMComponent->MinLOD = MeshInstance.Desc.MinLod;
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ISMComponent->SetLODDistanceScale(MeshInstance.Desc.LodScale);
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ISMComponent->SetMeshDrawCommandStatsCategory(MeshInstance.Desc.StatsCategory);
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ISMComponent->ComponentTags = MeshInstance.Desc.Tags;
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}
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FInstanceGroups::FInstanceGroupId FGeometryCollectionISM::AddInstanceGroup(int32 InstanceCount, TArrayView<const float> CustomDataFloats)
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{
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// When adding new group it will always have a single range
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const FInstanceGroups::FInstanceGroupId InstanceGroupIndex = InstanceGroups.AddGroup(InstanceCount);
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const FInstanceGroups::FInstanceGroupRange& NewInstanceGroup = InstanceGroups.GroupRanges[InstanceGroupIndex];
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// Ensure that remapping arrays are big enough to hold any new items.
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InstanceIds.SetNum(InstanceGroups.GetMaxInstanceIndex(), false);
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FTransform ZeroScaleTransform;
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ZeroScaleTransform.SetIdentityZeroScale();
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TArray<FTransform> ZeroScaleTransforms;
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ZeroScaleTransforms.Init(ZeroScaleTransform, InstanceCount);
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ISMComponent->PreAllocateInstancesMemory(InstanceCount);
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TArray<FPrimitiveInstanceId> AddedInstanceIds = ISMComponent->AddInstancesById(ZeroScaleTransforms, true, true);
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for (int32 InstanceIndex = 0; InstanceIndex < InstanceCount; ++InstanceIndex)
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{
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InstanceIds[NewInstanceGroup.Start + InstanceIndex] = AddedInstanceIds[InstanceIndex];
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}
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// Set any custom data.
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if (CustomDataFloats.Num())
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{
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const int32 NumCustomDataFloats = ISMComponent->NumCustomDataFloats;
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if (ensure(NumCustomDataFloats * InstanceCount == CustomDataFloats.Num()))
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{
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for (int32 InstanceIndex = 0; InstanceIndex < InstanceCount; ++InstanceIndex)
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{
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ISMComponent->SetCustomDataById(AddedInstanceIds[InstanceIndex], CustomDataFloats.Slice(InstanceIndex * NumCustomDataFloats, NumCustomDataFloats));
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}
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}
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}
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return InstanceGroupIndex;
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}
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FGeometryCollectionISMPool::FISMIndex FGeometryCollectionISMPool::AddISM(UGeometryCollectionISMPoolComponent* OwningComponent, const FGeometryCollectionStaticMeshInstance& MeshInstance)
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{
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FISMIndex* ISMIndexPtr = MeshToISMIndex.Find(MeshInstance);
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if (ISMIndexPtr != nullptr)
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{
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return *ISMIndexPtr;
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}
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// Take an ISM from the current FreeLists if available instead of allocating a new slot.
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FISMIndex ISMIndex = INDEX_NONE;
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if (FreeListISM.Num())
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{
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ISMIndex = FreeListISM.Last();
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FreeListISM.RemoveAt(FreeListISM.Num() - 1);
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}
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else if (FreeList.Num())
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{
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ISMIndex = FreeList.Last();
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FreeList.RemoveAt(FreeList.Num() - 1);
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ISMs[ISMIndex].CreateISM(OwningComponent->GetOwner());
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}
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else
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{
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ISMIndex = ISMs.AddDefaulted();
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ISMs[ISMIndex].CreateISM(OwningComponent->GetOwner());
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}
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ISMs[ISMIndex].InitISM(MeshInstance);
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MeshToISMIndex.Add(MeshInstance, ISMIndex);
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return ISMIndex;
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}
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FGeometryCollectionMeshInfo FGeometryCollectionISMPool::AddISM(UGeometryCollectionISMPoolComponent* OwningComponent, const FGeometryCollectionStaticMeshInstance& MeshInstance, int32 InstanceCount, TArrayView<const float> CustomDataFloats)
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{
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FGeometryCollectionMeshInfo Info;
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Info.ISMIndex = AddISM(OwningComponent, MeshInstance);
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Info.InstanceGroupIndex = ISMs[Info.ISMIndex].AddInstanceGroup(InstanceCount, CustomDataFloats);
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return Info;
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}
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bool FGeometryCollectionISMPool::BatchUpdateInstancesTransforms(FGeometryCollectionMeshInfo& MeshInfo, int32 StartInstanceIndex, TArrayView<const FTransform> NewInstancesTransforms, bool bWorldSpace, bool bMarkRenderStateDirty, bool bTeleport, bool bAllowPerInstanceRemoval)
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{
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if (!ISMs.IsValidIndex(MeshInfo.ISMIndex))
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{
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UE_LOG(LogChaos, Warning, TEXT("UGeometryCollectionISMPoolComponent : Invalid ISM Id (%d) when updating the transform "), MeshInfo.ISMIndex);
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return false;
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}
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FGeometryCollectionISM& ISM = ISMs[MeshInfo.ISMIndex];
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const FInstanceGroups::FInstanceGroupRange& InstanceGroup = ISM.InstanceGroups.GroupRanges[MeshInfo.InstanceGroupIndex];
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// If ISM component has identity transform (the common case) then we can skip world space to component space maths inside BatchUpdateInstancesTransforms()
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bWorldSpace &= !ISM.ISMComponent->GetComponentTransform().Equals(FTransform::Identity, 0.f);
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// The transform count should fit within the instance group.
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// Clamp it if it doesn't, but if we hit this ensure we need to investigate why.
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ensure(StartInstanceIndex + NewInstancesTransforms.Num() <= InstanceGroup.Count);
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const int32 NumTransforms = FMath::Min(NewInstancesTransforms.Num(), InstanceGroup.Count - StartInstanceIndex);
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// Loop over transforms.
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// todo: There may be some value in batching InstanceIds and caling one function for each of Add/Remove/Update.
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// However the ISM batched calls themselves seem to be just simple loops over the single instance calls, so probably no benefit.
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for (int InstanceIndex = StartInstanceIndex; InstanceIndex < StartInstanceIndex + NumTransforms; ++InstanceIndex)
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{
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FPrimitiveInstanceId InstanceId = ISM.InstanceIds[InstanceGroup.Start + InstanceIndex];
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FTransform const& Transform = NewInstancesTransforms[InstanceIndex];
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if (bAllowPerInstanceRemoval)
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{
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if (Transform.GetScale3D().IsZero() && InstanceId.IsValid())
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{
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// Zero scale is used to indicate that we should remove the instance from the ISM.
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ISM.ISMComponent->RemoveInstanceById(InstanceId);
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ISM.InstanceIds[InstanceGroup.Start + InstanceIndex] = FPrimitiveInstanceId();
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continue;
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}
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else if (!Transform.GetScale3D().IsZero() && !InstanceId.IsValid())
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{
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// Re-add the instance to the ISM if the scale becomes non-zero.
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ISM.InstanceIds[InstanceGroup.Start + InstanceIndex] = ISM.ISMComponent->AddInstanceById(Transform, bWorldSpace);
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continue;
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}
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}
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if (InstanceId.IsValid())
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{
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ISM.ISMComponent->UpdateInstanceTransformById(InstanceId, Transform, bWorldSpace, bTeleport);
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}
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}
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return true;
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}
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void FGeometryCollectionISMPool::BatchUpdateInstanceCustomData(FGeometryCollectionMeshInfo const& MeshInfo, int32 CustomFloatIndex, float CustomFloatValue)
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{
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if (!ISMs.IsValidIndex(MeshInfo.ISMIndex))
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{
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return;
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}
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FGeometryCollectionISM& ISM = ISMs[MeshInfo.ISMIndex];
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if (!ensure(CustomFloatIndex < ISM.MeshInstance.Desc.NumCustomDataFloats))
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{
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return;
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}
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const FInstanceGroups::FInstanceGroupRange& InstanceGroup = ISM.InstanceGroups.GroupRanges[MeshInfo.InstanceGroupIndex];
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for (int32 InstanceIndex = 0; InstanceIndex < InstanceGroup.Count; ++InstanceIndex)
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{
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const FPrimitiveInstanceId InstanceId = ISM.InstanceIds[InstanceGroup.Start + InstanceIndex];
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if (InstanceId.IsValid())
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{
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ISM.ISMComponent->SetCustomDataValueById(InstanceId, CustomFloatIndex, CustomFloatValue);
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}
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}
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}
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void FGeometryCollectionISMPool::RemoveISM(const FGeometryCollectionMeshInfo& MeshInfo)
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{
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if (ISMs.IsValidIndex(MeshInfo.ISMIndex))
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{
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FGeometryCollectionISM& ISM = ISMs[MeshInfo.ISMIndex];
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const FInstanceGroups::FInstanceGroupRange& InstanceGroup = ISM.InstanceGroups.GroupRanges[MeshInfo.InstanceGroupIndex];
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for (int32 Index = 0; Index < InstanceGroup.Count; ++Index)
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{
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FPrimitiveInstanceId InstanceId = ISM.InstanceIds[InstanceGroup.Start + Index];
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if (InstanceId.IsValid())
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{
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// todo: Could RemoveInstanceByIds() instead as long as that function can handle skipping invalid InstanceIds.
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ISM.ISMComponent->RemoveInstanceById(InstanceId);
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}
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}
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#if DO_CHECK
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// clear the IDs
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for (int32 Index = 0; Index < InstanceGroup.Count; ++Index)
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{
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ISM.InstanceIds[InstanceGroup.Start + Index] = FPrimitiveInstanceId();
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}
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#endif
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ISM.InstanceGroups.RemoveGroup(MeshInfo.InstanceGroupIndex);
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if (ISM.InstanceGroups.IsEmpty())
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{
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// No live instances, so take opportunity to reset indexing.
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ISM.InstanceGroups.Reset();
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ISM.InstanceIds.Reset();
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}
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if (GUseComponentFreeList && ISM.InstanceGroups.IsEmpty())
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{
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// Remove component and push this ISM slot to the free list.
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ensure(ISM.ISMComponent->PerInstanceSMData.Num() == 0);
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MeshToISMIndex.Remove(ISM.MeshInstance);
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FreeListISM.Add(MeshInfo.ISMIndex);
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#if WITH_EDITOR
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ISM.ISMComponent->Rename(nullptr);
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#endif
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}
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}
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}
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void FGeometryCollectionISMPool::Clear()
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{
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MeshToISMIndex.Reset();
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FreeList.Reset();
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FreeListISM.Reset();
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if (ISMs.Num() > 0)
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{
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if (AActor* OwningActor = ISMs[0].ISMComponent->GetOwner())
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{
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for(FGeometryCollectionISM& ISM : ISMs)
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{
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ISM.ISMComponent->UnregisterComponent();
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ISM.ISMComponent->DestroyComponent();
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OwningActor->RemoveInstanceComponent(ISM.ISMComponent);
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}
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}
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ISMs.Reset();
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}
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}
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void FGeometryCollectionISMPool::GarbageCollect()
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{
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// Release one component per call until we reach minimum pool size.
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if (FreeListISM.Num() > GComponentFreeListTargetSize)
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{
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const int32 ISMIndex = FreeListISM.Last();
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FreeListISM.RemoveAt(FreeListISM.Num() - 1);
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UInstancedStaticMeshComponent* ISM = ISMs[ISMIndex].ISMComponent;
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ISM->UnregisterComponent();
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ISM->DestroyComponent();
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ISM->GetOwner()->RemoveInstanceComponent(ISM);
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ISMs[ISMIndex].ISMComponent = nullptr;
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FreeList.Add(ISMIndex);
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}
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}
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UGeometryCollectionISMPoolComponent::UGeometryCollectionISMPoolComponent(const FObjectInitializer& ObjectInitializer)
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: NextMeshGroupId(0)
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{
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PrimaryComponentTick.bCanEverTick = true;
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PrimaryComponentTick.bStartWithTickEnabled = true;
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PrimaryComponentTick.bAllowTickOnDedicatedServer = false;
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PrimaryComponentTick.TickInterval = 0.25f;
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}
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void UGeometryCollectionISMPoolComponent::TickComponent(float DeltaTime, enum ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction)
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{
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Super::TickComponent(DeltaTime, TickType, ThisTickFunction);
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Pool.GarbageCollect();
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}
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UGeometryCollectionISMPoolComponent::FMeshGroupId UGeometryCollectionISMPoolComponent::CreateMeshGroup(bool bAllowPerInstanceRemoval)
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{
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FGeometryCollectionMeshGroup Group;
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Group.bAllowPerInstanceRemoval = bAllowPerInstanceRemoval;
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MeshGroups.Add(NextMeshGroupId, Group);
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return NextMeshGroupId++;
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}
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void UGeometryCollectionISMPoolComponent::DestroyMeshGroup(FMeshGroupId MeshGroupId)
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{
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if (FGeometryCollectionMeshGroup* MeshGroup = MeshGroups.Find(MeshGroupId))
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{
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MeshGroup->RemoveAllMeshes(Pool);
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MeshGroups.Remove(MeshGroupId);
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}
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}
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UGeometryCollectionISMPoolComponent::FMeshId UGeometryCollectionISMPoolComponent::AddMeshToGroup(FMeshGroupId MeshGroupId, const FGeometryCollectionStaticMeshInstance& MeshInstance, int32 InstanceCount, TArrayView<const float> CustomDataFloats)
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{
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if (FGeometryCollectionMeshGroup* MeshGroup = MeshGroups.Find(MeshGroupId))
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{
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const FGeometryCollectionMeshInfo ISMInstanceInfo = Pool.AddISM(this, MeshInstance, InstanceCount, CustomDataFloats);
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return MeshGroup->AddMesh(MeshInstance, InstanceCount, ISMInstanceInfo);
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}
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UE_LOG(LogChaos, Warning, TEXT("UGeometryCollectionISMPoolComponent : Trying to add a mesh to a mesh group (%d) that does not exists"), MeshGroupId);
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return INDEX_NONE;
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}
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bool UGeometryCollectionISMPoolComponent::BatchUpdateInstancesTransforms(FMeshGroupId MeshGroupId, FMeshId MeshId, int32 StartInstanceIndex, const TArray<FTransform>& NewInstancesTransforms, bool bWorldSpace, bool bMarkRenderStateDirty, bool bTeleport)
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{
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return BatchUpdateInstancesTransforms(MeshGroupId, MeshId, StartInstanceIndex, MakeArrayView(NewInstancesTransforms), bWorldSpace, bMarkRenderStateDirty, bTeleport);
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}
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bool UGeometryCollectionISMPoolComponent::BatchUpdateInstancesTransforms(FMeshGroupId MeshGroupId, FMeshId MeshId, int32 StartInstanceIndex, TArrayView<const FTransform> NewInstancesTransforms, bool bWorldSpace, bool bMarkRenderStateDirty, bool bTeleport)
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{
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if (FGeometryCollectionMeshGroup* MeshGroup = MeshGroups.Find(MeshGroupId))
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{
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return MeshGroup->BatchUpdateInstancesTransforms(Pool, MeshId, StartInstanceIndex, NewInstancesTransforms, bWorldSpace, bMarkRenderStateDirty, bTeleport);
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}
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UE_LOG(LogChaos, Warning, TEXT("UGeometryCollectionISMPoolComponent : Trying to update instance with mesh group (%d) that not exists"), MeshGroupId);
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return false;
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}
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bool UGeometryCollectionISMPoolComponent::BatchUpdateInstanceCustomData(FMeshGroupId MeshGroupId, int32 CustomFloatIndex, float CustomFloatValue)
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{
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if (FGeometryCollectionMeshGroup* MeshGroup = MeshGroups.Find(MeshGroupId))
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{
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|
MeshGroup->BatchUpdateInstanceCustomData(Pool, CustomFloatIndex, CustomFloatValue);
|
|
return true;
|
|
}
|
|
UE_LOG(LogChaos, Warning, TEXT("UGeometryCollectionISMPoolComponent : Trying to update instance with mesh group (%d) that not exists"), MeshGroupId);
|
|
return false;
|
|
}
|
|
|
|
void UGeometryCollectionISMPoolComponent::PreallocateMeshInstance(const FGeometryCollectionStaticMeshInstance& MeshInstance)
|
|
{
|
|
// If we are recycling components with a free list then we don't expect to have zero instance components.
|
|
// So don't do preallocation of components either in that case.
|
|
if (!GUseComponentFreeList)
|
|
{
|
|
Pool.AddISM(this, MeshInstance);
|
|
}
|
|
}
|
|
|
|
void UGeometryCollectionISMPoolComponent::GetResourceSizeEx(FResourceSizeEx& CumulativeResourceSize)
|
|
{
|
|
Super::GetResourceSizeEx(CumulativeResourceSize);
|
|
|
|
int32 SizeBytes =
|
|
MeshGroups.GetAllocatedSize()
|
|
+ Pool.MeshToISMIndex.GetAllocatedSize()
|
|
+ Pool.ISMs.GetAllocatedSize()
|
|
+ Pool.FreeList.GetAllocatedSize()
|
|
+ Pool.FreeListISM.GetAllocatedSize();
|
|
|
|
for (FGeometryCollectionISM ISM : Pool.ISMs)
|
|
{
|
|
SizeBytes += ISM.InstanceIds.GetAllocatedSize()
|
|
+ ISM.InstanceGroups.GroupRanges.GetAllocatedSize()
|
|
+ ISM.InstanceGroups.FreeList.GetAllocatedSize();
|
|
}
|
|
|
|
CumulativeResourceSize.AddDedicatedSystemMemoryBytes(SizeBytes);
|
|
}
|