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  

Structs

Name Remarks
FEmbedSimplePathSettings TODO: support for embedding arbitrary paths in mesh using a graph remesher **

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,
const FEmbedSimplePathSettings& Settings
)

 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) 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  

Public Virtual

Name Remarks Include Path Unreal Specifiers

virtual EOperationValidationResult Validate()

   Operations/EmbedSurfacePath.h  

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