FHierarchicalLODBuilder | Unreal Engine 5.7 Documentation

This is Hierarchical LOD builder

This builds list of clusters and make sure it's sorted in the order of lower cost to high and merge clusters


Name	FHierarchicalLODBuilder
Type	struct
Header File	/Engine/Source/Editor/UnrealEd/Public/HierarchicalLOD.h
Include Path	#include "HierarchicalLOD.h"

Syntax

struct FHierarchicalLODBuilder

Name	Remarks	Include Path	Unreal Specifiers
FHierarchicalLODBuilder ( UWorld* InWorld, bool bInPersistentLevelOnly )		HierarchicalLOD.h
FHierarchicalLODBuilder ()	DO NOT USE. This constructor is for internal usage only for hot-reload purposes.	HierarchicalLOD.h

Name	Type	Remarks	Include Path
bPersistentLevelOnly	bool	Whether we should build HLOD for all sublevels or only the persistent level	HierarchicalLOD.h
Clusters	TArray< FLODCluster, TMemStackAllocator<> >	Array of LOD Clusters - this is only valid within scope since mem stack allocator	HierarchicalLOD.h
HLODSettings	const UHierarchicalLODSettings *		HierarchicalLOD.h
HLODVolumeActors	TMap< ALODActor , AHierarchicalLODVolume >		HierarchicalLOD.h
HLODVolumeClusters	TMap< AHierarchicalLODVolume *, FLODCluster >	Array of LOD clusters created for the HierachicalLODVolumes found within the level	HierarchicalLOD.h
LODLevelLODActors	TArray< TArray< ALODActor * > >	LOD Actors per HLOD level	HierarchicalLOD.h
NewLODActors	TArray< ALODActor * >	Newly spawned LODActors from cluster(s) rebuilding	HierarchicalLOD.h
OldLODActors	TArray< ALODActor * >	Previous LODActors found in level	HierarchicalLOD.h
RejectedActorsInLevel	TArray< AActor * >	Actors which were rejected from the previous HLOD level(s)	HierarchicalLOD.h
TempLevel	ULevel *	Temporary LODActor levels	HierarchicalLOD.h
ValidStaticMeshActorsInLevel	TArray< AActor * >	Valid Static Mesh actors in level (populated during initialize clusters)	HierarchicalLOD.h
World	UWorld *	Owning world HLODs are created for	HierarchicalLOD.h

Name	Remarks	Include Path
void Build()	Build, Builds the clusters and spawn LODActors with their merged Static Meshes	HierarchicalLOD.h
void BuildMeshesForLODActors ( bool bForceAll )	Builds the LOD meshes for all LODActors inside of the World's Levels	HierarchicalLOD.h
void BuildMeshForLODActor ( ALODActor* LODActor, const uint32 LODLevel )	Build a single LOD Actor's mesh	HierarchicalLOD.h
void ClearHLODs()	Clear all the HLODs and the ALODActors that were created for them	HierarchicalLOD.h
void ClearPreviewBuild()	Clear only the ALODActorsPreview	HierarchicalLOD.h
void DeleteEmptyHLODPackages ( ULevel* InLevel )	Delete HLOD packages that are empty.	HierarchicalLOD.h
void GetMeshesPackagesToSave ( ULevel* InLevel, TSet< UPackage* >& InHLODPackagesToSave, const FString& PreviousLevelName )	Get the list of mesh packages to save for a given level	HierarchicalLOD.h
bool NeedsBuild ( bool bInForce ) const		HierarchicalLOD.h
void PreviewBuild()	PreviewBuild, Builds the clusters and spawns LODActors but without actually creating/merging new StaticMeshes	HierarchicalLOD.h
void SaveMeshesForActors()	Saves HLOD meshes for actors in all the World's levels	HierarchicalLOD.h