FMeshSurfacePath | Unreal Engine 4.27 Documentation

API > API/Runtime > API/Runtime/GeometryCore > API/Runtime/GeometryCore/Operations

References


Module	GeometryCore
Header	/Engine/Source/Runtime/GeometryCore/Public/Operations/EmbedSurfacePath.h
Include	#include "Operations/EmbedSurfacePath.h"

Syntax

class FMeshSurfacePath

Remarks

Walk the surface of an FDynamicMesh to try find a planar path connecting two points. Paths include every vertex and edge they need to cross. Greedy algorithm will only return one path if there are multiple.bool WalkMeshPlanar( const FDynamicMesh3* Mesh, int StartTri, int EndVertID, FVector3d StartPt, int EndTri, FVector3d EndPt, FVector3d WalkPlaneNormal, TFunction VertexToPosnFn, bool bAllowBackwardsSearch, double AcceptEndPtOutsideDist, double PtOnPlaneThreshold, TArray>& WalkedPath, double BackwardsTolerance = FMathd::ZeroTolerance * 10); Represent a path on the surface of a mesh via barycentric coordinates and triangle references

Variables

	Type	Name	Description
	bool	bIsClosed
	FDynamicMesh3 *	Mesh
	TArray< TPair< FMeshSurfacePoint, int > >	Path

Constructors

	Type	Name	Description
		FMeshSurfacePath ( FDynamicMesh3* Mesh )	Cut mesh with plane. Assumption is that plane normal is Z value.

Destructors

	Type	Name	Description
		~FMeshSurfacePath ()

Functions

Type	Name	Description
bool	AddViaPlanarWalk ( int StartTri, int StartVID, FVector3d StartPt, int EndTri, int EndVertID, FVector3d EndPt, FVector3d WalkPlaneNormal, TFunction< FVector3d(const FDynamicMesh3*, int)> VertexToPosnFn, bool bAllowBackwardsSearch, double AcceptEndPtOutsideDist, double PtOnPlaneThresholdSq, double BackwardsTolerance )
bool	ClosePath ()	Make the embedded path into a closed loop.
*bool	EmbedPath ( bool bUpdatePath, TArray< int >& PathVertices, TFunction< bool(const TArray< FVector2d >&Vertices, const TArray< FIndex3i >&LabelledEdges, TArray... )	TODO: support for embedding arbitrary paths in mesh using a graph remesher **
*bool	EmbedSimplePath ( bool bUpdatePath, TArray< int >& PathVertices, bool bDoNotDuplicateFirstVertexID, double SnapElementThresholdSq )	Embed a surface path in mesh provided that the path only crosses vertices and edges except at the start and end, so we can add the path easily with local edge splits and possibly two triangle pokes (rather than needing general remeshing machinery)
bool	IsClosed ()
bool	IsConnected ()	TODO: not clear if we need this helper to find the shared triangle (if it exists) that we could traverse to connect two surface points.
void	Reset ()
EOperationValidationResult	Validate ()

Navigation