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  3. FMeshSceneAdapter

FMeshSceneAdapter

[FMeshSceneAdapter](API\Plugins\ModelingComponents\Scene\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).

API > API/Plugins > API/Plugins/ModelingComponents > API/Plugins/ModelingComponents/Scene

References

   
Module ModelingComponents
Header /Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponents/Public/Scene/MeshSceneAdapter.h
Include #include "Scene/MeshSceneAdapter.h"

Syntax

class FMeshSceneAdapter

Remarks

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.

Variables

  Type Name Description
Protected variable bool bHaveSpatialEvaluationCache  
Protected variable bool bSceneIsAllSolids  
Protected variable FAxisAlignedBox3d CachedWorldBounds  
Protected variable TSharedPtr< FSparseDynamicOctree3 > Octree Octree of elements in SortedSpatials list.
Protected variable TArray< TUniquePtr< FActorAdapter > > SceneActors Top-level list of ActorAdapters, which represent each Actor and set of Components
Protected variable TArray< FSpatialCacheInfo > SortedSpatials List of all unique scene meshes that have spatial data structure available
Protected variable TMap< void *, TSharedPtr< FSpatialWrapperInfo > > SpatialAdapters Unique set of spatial data structure query interfaces, one for each Mesh object, which is identified by void* pointer.

Constructors

  Type Name Description
Public function    
Public function    
Public function    

Destructors

  Type Name Description
Public function Virtual    

Functions

  Type Name Description
Public function void

AddActors ( const TArray< AActor* >& ActorsSetIn
)

 Mesh Scene Setup etc Add the given Actors to the Mesh Scene
Public function void

AddComponents ( const TArray< UActorComponent* >& ComponentSetIn
)

 Add the given Components to the Mesh Scene.
Public function void

Build ( const FMeshSceneAdapterBuildOptions& BuildOptions
)

 Build the Mesh Scene.
Protected function void  
Public function Virtual void Precompute data structures that accelerate spatial evaluation queries.
Public function Virtual void

CollectMeshSeedPoints ( TArray< FVector3d >& PointsOut
)

  
Public function void

FastUpdateTransforms ( bool bRebuildSpatialCache
)

 Update the transforms on all the Components in the current Mesh Scene.
Public function Virtual double

FastWindingNumber ( const FVector3d& WorldPoint,
bool bFastEarlyOutIfPossible
)

  
Public function Virtual bool

FindNearestRayIntersection ( const FRay3d& WorldRay,
FMeshSceneRayHit& HitResultOut
)

 Intersect the given Ray with the MeshScene and find the nearest mesh hit
Public function void

GenerateBaseClosingMesh ( double BaseHeight,
double ExtrudeHeight
)

 Generate a new mesh that "caps" the mesh scene on the bottom.
Public function Virtual void Append all instance triangles to a single mesh. May be very large.
Public function Virtual FAxisAlignedBox3d Mesh Scene Queries
Public function Virtual void  
Public function Virtual FAxisAlignedBox3d

GetMeshBoundingBox ( UActorComponent* Component,
int32 ComponentIndex
)

  
Public function Virtual void Get all world-space bounding boxes for all Scene Meshes
Protected function void

InitializeSpatialWrappers ( const TArray< FActorAdapter* >& NewItemsToProcess
)

  
Public function Virtual void

ParallelMeshVertexEnumeration ( TFunctionRef< bool(int32 NumMeshes)> InitializeFunc,
TFunctionRef< bool(int32 MeshIndex, AActor*SourceActor, const FActorChildMesh*ChildMeshInf...,
TFunctionRef< bool(int32 MeshIndex, AActor*SourceActor, const FActorChildMesh*ChildMeshInf...,
bool bForceSingleThreaded
)

 Run a custom query across all world-transformed scene mesh vertices.
Public function Virtual void

ProcessActorChildMeshes ( TFunctionRef< void(const FActorAdapter*ActorAdapter, const FActorChildMesh*ChildMesh)> Pro...
)

 Run a custom query across all scene actor child meshes.
Protected function void  

Classes

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

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