FIntrinsicMesh | Unreal Engine 5.6 Documentation

API > API/Plugins > API/Plugins/DynamicMesh

FIntrinsicMesh extends the FSimpleIntrinsicMesh with the addition of a 'normal coordinate' based correspondence with the surface mesh.

This class supports both the trace of intrinsic mesh edges across the surface mesh, and the trace of surface mesh edges across the intrinsic mesh.

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 interpolation.

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

Syntax

class FIntrinsicMesh : public UE::Geometry::FSimpleIntrinsicMesh

Inheritance Hierarchy

FSimpleIntrinsicEdgeFlipMesh → FSimpleIntrinsicMesh → FIntrinsicMesh

Constructors

Name	Remarks	Include Path
FIntrinsicMesh ()		Operations/IntrinsicTriangulationMesh.h
FIntrinsicMesh ( const FIntrinsicMesh& )		Operations/IntrinsicTriangulationMesh.h
FIntrinsicMesh ( const FDynamicMesh3& SurfaceMesh )	FIntrinsicMesh Methods	Operations/IntrinsicTriangulationMesh.h

Typedefs

Name	Type	Include Path
FEdge	FSimpleIntrinsicMesh::FEdge	Operations/IntrinsicTriangulationMesh.h
FEdgeAndCrossingIdx	IntrinsicCorrespondenceUtils::FNormalCoordinates::FEdgeAndCrossingIdx	Operations/IntrinsicTriangulationMesh.h
FEdgeCorrespondence	TEdgeCorrespondence< FIntrinsicMesh >	Operations/IntrinsicTriangulationMesh.h
FEdgeFlipInfo	FSimpleIntrinsicMesh::FEdgeFlipInfo	Operations/IntrinsicTriangulationMesh.h
FEdgeSplitInfo	DynamicMeshInfo::FEdgeSplitInfo	Operations/IntrinsicTriangulationMesh.h
FNormalCoordinates	IntrinsicCorrespondenceUtils::FNormalCoordinates	Operations/IntrinsicTriangulationMesh.h
FPokeTriangleInfo	DynamicMeshInfo::FPokeTriangleInfo	Operations/IntrinsicTriangulationMesh.h
FSurfacePoint	IntrinsicCorrespondenceUtils::FSurfacePoint	Operations/IntrinsicTriangulationMesh.h
MyBase	FSimpleIntrinsicMesh	Operations/IntrinsicTriangulationMesh.h

Functions

Public

Name	Remarks	Include Path
FEdgeCorrespondence ComputeEdgeCorrespondence()		Operations/IntrinsicTriangulationMesh.h
EMeshResult FlipEdge ( int32 EID, FEdgeFlipInfo& EdgeFlipInfo )	Flip a single edge in the Intrinsic Mesh.	Operations/IntrinsicTriangulationMesh.h
const FDynamicMesh3 * GetExtrinsicMesh()		Operations/IntrinsicTriangulationMesh.h
TArray< FEdgeAndCrossingIdx > GetImplicitEdgeCrossings ( const int32 SurfaceEID, const bool bReverse ) const	Trace the specified surface (extrinsic) mesh edge across the intrinsic mesh.	Operations/IntrinsicTriangulationMesh.h
const IntrinsicCorrespondenceUtils::FNormalCoordinates & GetNormalCoordinates()		Operations/IntrinsicTriangulationMesh.h
FVector3d GetVertexPosition ( int32 VID ) const		Operations/IntrinsicTriangulationMesh.h
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< FSurfacePoint > TraceEdge ( int32 IntrinsicEID, double CoalesceThreshold, bool bReverse ) const	Note: when tracing few edges, this method is preferred to using the FEdgeCorrespondence based tracing (see FEdgeCorrespondence below).	Operations/IntrinsicTriangulationMesh.h
TArray< FSurfacePoint > TraceSurfaceEdge ( int32 SurfaceEID, double CoalesceThreshold, bool bReverse ) const	Trace the specified surface (extrinsic) mesh edge across the intrinsic mesh.	Operations/IntrinsicTriangulationMesh.h