FIntrinsicTriangulation | Unreal Engine 5.7 Documentation

API > API/Plugins > API/Plugins/DynamicMesh

Class that manages the intrinsic triangulation of a given FDynamicMesh.

This supports mesh operations that: SplitEdge, PokeTriangle, FlipEdge.

Both SplitEdge and PokeTriangle will generate new vertices and triangles in the intrinsic triangulation. These vertices will live on the surface of the original mesh and their location (in R3 and relative to the original surface ) is computed by tracing a path on the original mesh.

NB: The lifetime of this structure should not exceed that of the original FDynamicMesh as this class holds a pointer to that mesh to reference locations on its surface. Also, this class isn't currently expected to work with surface meshes that have bow-ties.

Note: This assumes but does not check that the FDynamicMesh3 "Surface Mesh" has consistent orientation of all triangles.


Name	FIntrinsicTriangulation
Type	class
Header File	/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Operations/IntrinsicTriangulationMesh.h
Include Path	#include "Operations/IntrinsicTriangulationMesh.h"

Syntax

class FIntrinsicTriangulation : public UE::Geometry::FSimpleIntrinsicMesh

Inheritance Hierarchy

FSimpleIntrinsicEdgeFlipMesh → FSimpleIntrinsicMesh → FIntrinsicTriangulation

Constructors

Name	Remarks	Include Path
FIntrinsicTriangulation ()		Operations/IntrinsicTriangulationMesh.h
FIntrinsicTriangulation ( const FDynamicMesh3& SrcMesh )	FIntrinsicTriangulation Methods	Operations/IntrinsicTriangulationMesh.h
FIntrinsicTriangulation ( const FIntrinsicTriangulation& )		Operations/IntrinsicTriangulationMesh.h

Typedefs

Name	Type	Include Path
FEdgeFlipInfo	FSimpleIntrinsicMesh::FEdgeFlipInfo	Operations/IntrinsicTriangulationMesh.h
FEdgeSplitInfo	FSimpleIntrinsicMesh::FEdgeSplitInfo	Operations/IntrinsicTriangulationMesh.h
FPokeTriangleInfo	FSimpleIntrinsicMesh::FPokeTriangleInfo	Operations/IntrinsicTriangulationMesh.h
FSignpost	IntrinsicCorrespondenceUtils::FSignpost	Operations/IntrinsicTriangulationMesh.h
FSurfacePoint	IntrinsicCorrespondenceUtils::FSurfacePoint	Operations/IntrinsicTriangulationMesh.h
MyBase	FSimpleIntrinsicMesh	Operations/IntrinsicTriangulationMesh.h

Functions

Public

Name	Remarks	Include Path
EMeshResult FlipEdge ( int32 EID, FEdgeFlipInfo& EdgeFlipInfo )	Flip a single edge in the Intrinsic Mesh.	Operations/IntrinsicTriangulationMesh.h
const FDynamicMesh3 * GetExtrinsicMesh()		Operations/IntrinsicTriangulationMesh.h
FVector3d GetVertexPosition ( int32 VID ) const		Operations/IntrinsicTriangulationMesh.h
const FIntrinsicTriangulation::FSurfacePoint & GetVertexSurfacePoint ( int32 VID ) const		Operations/IntrinsicTriangulationMesh.h
EMeshResult PokeTriangle ( int32 TID, const FVector3d& BaryCoordinates, FPokeTriangleInfo& PokeInfo )	Insert a new vertex inside an intrinsic triangle, ie do a 1 to 3 triangle split	Operations/IntrinsicTriangulationMesh.h
EMeshResult SplitEdge ( int32 EdgeAB, FEdgeSplitInfo& SplitInfo, double SplitParameterT )	Split an intrinsic edge of the mesh by inserting a vertex.	Operations/IntrinsicTriangulationMesh.h
TArray< FIntrinsicTriangulation::FSurfacePoint > TraceEdge ( int32 EID, double CoalesceThreshold, bool bReverse ) const		Operations/IntrinsicTriangulationMesh.h

Protected

Name	Remarks	Include Path	Unreal Specifiers
double UpdateVertexByEdgeTrace ( const int32 UpdateVID, const int32 StartVID, const double TracePolarDir, const double TraceDistance )	Given edge EID connects UpdateVID and StartVID, this update the SurfacePosition of the vertex UpdateVID by tracing the edge EID a distance TraceDistance from StartVID.	Operations/IntrinsicTriangulationMesh.h

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