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  3. FSubRegionRemesher

FSubRegionRemesher

[FSubRegionRemesher](API\Plugins\DynamicMesh\FSubRegionRemesher) is an extension of [FRemesher](API\Plugins\DynamicMesh\FRemesher) that allows for constraining remeshing to a localized region of a mesh.

API > API/Plugins > API/Plugins/DynamicMesh

Warnings * Currently "boundary" edges of the ROI that are split will result in the ROI growing to include both new edges created by the split.

Inheritance Hierarchy

References

   
Module DynamicMesh
Header /Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/SubRegionRemesher.h
Include #include "SubRegionRemesher.h"

Syntax

class FSubRegionRemesher : public UE::Geometry::FRemesher

Remarks

FSubRegionRemesher is an extension of FRemesher that allows for constraining remeshing to a localized region of a mesh. Currently this is initialized from a Vertex ROI.

Currently "boundary" edges of the ROI that are split will result in the ROI growing to include both new edges created by the split.

Variables

  Type Name Description
Protected variable bool bTrackRemoved Controls whether RemovedLastPass will be populated
Protected variable int CurEdge Index of current edge in .Edges we are at in StartEdges/GetNextEdge modulo-iteration
Protected variable TSet< int > EdgeROI Active set of edges we will consider for remeshing.
Protected variable TArray< int > Edges Static list of edges to consider during a pass (set in UpdateROI which must be called each pass)
Protected variable FUniqueIndexSet InitialROIEdgeVertices Temporary data structure used to quickly convert vertex set to edge set.
Protected variable FUniqueIndexSet InitialROITriangles Temporary data structure used to quickly convert vertex set to triangle set.
Protected variable uint32 LastRemeshPassCounter  
Protected variable uint32 LastUpdateROICounter Counters for making sure that UpdateROI has been called
Protected variable TSet< int > RemovedLastPassTris Set of triangles removed in last pass. Enable this by calling BeginTrackRemovedTrisInPass()
Protected variable TArray< FVector3d > SmoothedPositions  
Protected variable TArray< int32 > SmoothIndices Localized smoothing
Protected variable TSet< int > TriangleROI Active set of triangles.
Protected variable TSet< int > VertexROI Set of vertices in ROI.

Constructors

  Type Name Description
Public function    

Destructors

  Type Name Description
Public function Virtual    

Functions

  Type Name Description
Protected function void

AddEdgeToTriangleROI ( int EdgeID
)

  
Protected function void

AddVertexToTriangleROI ( int VertexID
)

  
Public function void Call before BasicRemeshPass() to enable tracking of removed triangles
Public function const TSet< int32 > & Call after BasicRemeshPass() to disable and return tracking of removed triangles
Public function TSet< int > && Extract final triangle ROI.
Public function Const const TArray< int > & This is only valid after calling UpdateROI() and before calling BasicRemeshPass().
Public function Const const TSet< int > &  
Public function Const const TSet< int > &  
Public function Const const TSet< int > &  
Public function void

InitializeFromTriangleROI ( const TSet< int >& InTriangleROI
)

  
Public function void Initialize edge-subregion ROI from the VertexROI member that has been externally initialized
Public function void

Reset ()

  
Public function void Tell a MeshChangeTracker about the set of triangles that we might modify in the next remesh pass.
Public function void

SetInitialVertexROI ( const TSet< int >& Vertices
)

  
Public function void

SetInitialVertexROI ( TSet< int >&& Vertices
)

  
Public function void

SetInitialVertexROI ( const TArray< int >& Vertices
)

  
Public function void Update the internal data structures in preparation for a call to FRemesher::BasicRemeshPass.
Protected function EVertexControl

VertexFilter ( int VertexID
)

  

Overridden from FRemesher

  Type Name Description
Public function Virtual void Forwards to FRemesher::BasicRemeshPass
Protected function Virtual void

FullSmoothPass_Buffer ( bool bParallel
)

 Applies a smoothing pass to the mesh, storing intermediate positions in a buffer and then writing them at the end (so, no order effect)
Protected function Virtual int

GetNextEdge ( int CurEdgeID,
bool& bDone
)

  
Protected function Virtual void

OnEdgeCollapse ( int EdgeID,
int VertexA,
int VertexB,
const FDynamicMesh3::FEdgeCollapseInfo& CollapseInfo
)

 Callback for subclasses to override to implement custom behavior
Protected function Virtual void

OnEdgeFlip ( int EdgeID,
const FDynamicMesh3::FEdgeFlipInfo& FlipInfo
)

 Callback for subclasses to override to implement custom behavior
Protected function Virtual void

OnEdgeSplit ( int EdgeID,
int VertexA,
int VertexB,
const FDynamicMesh3::FEdgeSplitInfo& SplitInfo
)

 Callbacks and in-progress informationCallback for subclasses to override to implement custom behavior
Protected function Virtual int Specialization of Remesher functionality

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