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  3. FMeshSurfacePath

FMeshSurfacePath

Walk the surface of an FDynamicMesh to try find a planar path connecting two points.

API > API/Runtime > API/Runtime/GeometryCore

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

   
Name FMeshSurfacePath
Type class
Header File /Engine/Source/Runtime/GeometryCore/Public/Operations/EmbedSurfacePath.h
Include Path #include "Operations/EmbedSurfacePath.h"

Syntax

class FMeshSurfacePath

Constructors

Name Remarks Include Path Unreal Specifiers

FMeshSurfacePath ( FDynamicMesh3* Mesh
)

 Cut mesh with plane. Assumption is that plane normal is Z value. Operations/EmbedSurfacePath.h  

Destructors

Name Remarks Include Path Unreal Specifiers

virtual ~FMeshSurfacePath()

   Operations/EmbedSurfacePath.h  

Variables

Public

Name Type Remarks Include Path Unreal Specifiers
bIsClosed bool   Operations/EmbedSurfacePath.h  
Mesh FDynamicMesh3 *   Operations/EmbedSurfacePath.h  
Path TArray< TPair< FMeshSurfacePoint, int > >   Operations/EmbedSurfacePath.h  

Functions

Public

Name Remarks Include Path Unreal Specifiers

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
)

   Operations/EmbedSurfacePath.h  

bool ClosePath ()

 Make the embedded path into a closed loop. Operations/EmbedSurfacePath.h  

bool EmbedSimplePath ( bool bUpdatePath,
TArray< int >& PathVertices,
bool bDoNotDuplicateFirstVertexID,
double SnapElementThresholdSq
)

 TODO: support for embedding arbitrary paths in mesh using a graph remesher ** Operations/EmbedSurfacePath.h  

bool IsClosed()

   Operations/EmbedSurfacePath.h  

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. Operations/EmbedSurfacePath.h  

void Reset()

   Operations/EmbedSurfacePath.h  

virtual EOperationValidationResult Validate()

   Operations/EmbedSurfacePath.h  

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