FMeshSceneAdapter | Unreal Engine 5.6 Documentation

API > API/Plugins > API/Plugins/ModelingComponents

FMeshSceneAdapter creates an internal representation of an Actor/Component/Asset hierarchy, so that a minimal set of Mesh data structures can be constructed for the unique Meshes (generally Assets). This allows queries against the Actor set to be computed without requiring mesh copies or duplicates of the mesh data structures (ie, saving memory, at the cost of some computation overhead).

Currently this builds an AABBTree and FastWindingTree for each unique Mesh, and supports various queries based on those data structures.


Name	FMeshSceneAdapter
Type	class
Header File	/Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponents/Public/Scene/MeshSceneAdapter.h
Include Path	#include "Scene/MeshSceneAdapter.h"

Syntax

class FMeshSceneAdapter

Constructors

Name	Remarks	Include Path	Unreal Specifiers
FMeshSceneAdapter ()		Scene/MeshSceneAdapter.h
FMeshSceneAdapter ( FMeshSceneAdapter&& )		Scene/MeshSceneAdapter.h
FMeshSceneAdapter ( const FMeshSceneAdapter& )		Scene/MeshSceneAdapter.h

Destructors

Name	Remarks	Include Path	Unreal Specifiers
virtual ~FMeshSceneAdapter()		Scene/MeshSceneAdapter.h

Structs

Name	Remarks
FSpatialCacheInfo	FSpatialCacheInfo represents a unique scene mesh with spatial data structure.
FSpatialWrapperInfo	FSpatialWrapperInfo is a "unique mesh" that knows which parent objects have references to it.
FStatistics	Statistics about the Mesh Scene returned by GetGeometryStatistics()

Functions

Public

Name	Remarks	Include Path
void AddActors ( const TArray< AActor* >& ActorsSetIn )	Mesh Scene Setup etc Add the given Actors to the Mesh Scene	Scene/MeshSceneAdapter.h
void AddComponents ( const TArray< UActorComponent* >& ComponentSetIn )	Add the given Components to the Mesh Scene.	Scene/MeshSceneAdapter.h
void Build ( const FMeshSceneAdapterBuildOptions& BuildOptions )	Build the Mesh Scene.	Scene/MeshSceneAdapter.h
virtual void BuildSpatialEvaluationCache ()	Precompute data structures that accelerate spatial evaluation queries.	Scene/MeshSceneAdapter.h
virtual void CollectMeshSeedPoints ( TArray< FVector3d >& PointsOut )		Scene/MeshSceneAdapter.h
void FastUpdateTransforms ( bool bRebuildSpatialCache )	Update the transforms on all the Components in the current Mesh Scene.	Scene/MeshSceneAdapter.h
virtual double FastWindingNumber ( const FVector3d& WorldPoint, bool bFastEarlyOutIfPossible )		Scene/MeshSceneAdapter.h
virtual bool FindNearestRayIntersection ( const FRay3d& WorldRay, FMeshSceneRayHit& HitResultOut )	Intersect the given Ray with the MeshScene and find the nearest mesh hit	Scene/MeshSceneAdapter.h
void GenerateBaseClosingMesh ( double BaseHeight, double ExtrudeHeight )	Generate a new mesh that "caps" the mesh scene on the bottom.	Scene/MeshSceneAdapter.h
virtual void GetAccumulatedMesh ( FDynamicMesh3& AccumMesh )	Append all instance triangles to a single mesh. May be very large.	Scene/MeshSceneAdapter.h
virtual FAxisAlignedBox3d GetBoundingBox()	Mesh Scene Queries	Scene/MeshSceneAdapter.h
virtual void GetGeometryStatistics ( FStatistics& StatsOut )		Scene/MeshSceneAdapter.h
virtual FAxisAlignedBox3d GetMeshBoundingBox ( UActorComponent* Component, int32 ComponentIndex )		Scene/MeshSceneAdapter.h
virtual void GetMeshBoundingBoxes ( TArray< FAxisAlignedBox3d >& Bounds )	Get all world-space bounding boxes for all Scene Meshes	Scene/MeshSceneAdapter.h
bool IsValid()	Whether valid actors/components were added to the scene representation	Scene/MeshSceneAdapter.h
virtual void ParallelMeshVertexEnumeration ( TFunctionRef< bool(int32 NumMeshes)> InitializeFunc, TFunctionRef< bool(int32 MeshIndex, AActorSourceActor, const FActorChildMeshChildMeshInf..., TFunctionRef< bool(int32 MeshIndex, AActorSourceActor, const FActorChildMeshChildMeshInf..., bool bForceSingleThreaded )	Run a custom query across all world-transformed scene mesh vertices.	Scene/MeshSceneAdapter.h
virtual void ProcessActorChildMeshes ( TFunctionRef< void(const FActorAdapterActorAdapter, const FActorChildMeshChildMesh)> Pro... )	Run a custom query across all scene actor child meshes.	Scene/MeshSceneAdapter.h

Protected

Name	Remarks	Include Path	Unreal Specifiers
void Build_FullDecompose ( const FMeshSceneAdapterBuildOptions& BuildOptions )		Scene/MeshSceneAdapter.h
void InitializeSpatialWrappers ( const TArray< FActorAdapter* >& NewItemsToProcess )		Scene/MeshSceneAdapter.h
void UpdateActorBounds ( FActorAdapter& Actor )		Scene/MeshSceneAdapter.h

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