UE::Geometry::FMeshMeshCut Class Reference

#include <MeshMeshCut.h>

Public Member Functions
	FMeshMeshCut (FDynamicMesh3 *MeshA, FDynamicMesh3 *MeshB)
EOperationValidationResult	Validate ()
GEOMETRYCORE_API bool	Cut (const MeshIntersection::FIntersectionsQueryResult &Intersections)
void	ResetOutputs ()

Public Attributes
FDynamicMesh3 *	Mesh [2]
double	SnapTolerance = FMathf::ZeroTolerance * 100.0
bool	bMutuallyCut = true
bool	bCutCoplanar = false
bool	bTrackInsertedVertices = false
TArray< int >	VertexChains [2]
TArray< int >	SegmentToChain [2]

Detailed Description

Cut a mesh where it crosses a second mesh – resolving all intersections, but not deleting geometry. Optionally resolve intersections mutually for both meshes.

Constructor & Destructor Documentation

FMeshMeshCut()

UE::Geometry::FMeshMeshCut::FMeshMeshCut ( FDynamicMesh3 *  MeshA, FDynamicMesh3 *  MeshB  )

inline

Member Function Documentation

Cut()

bool FMeshMeshCut::Cut

(

const MeshIntersection::FIntersectionsQueryResult &

Intersections

)

Split mesh(es) along the provided intersections

Parameters

Intersections

A set of mesh-mesh intersections, for example as returned by TMeshAABBTree3::FindAllIntersections

ResetOutputs()

void UE::Geometry::FMeshMeshCut::ResetOutputs ( )

inline

Validate()

EOperationValidationResult UE::Geometry::FMeshMeshCut::Validate ( )

inline

Returns

EOperationValidationResult::Ok if we can apply operation, or error code if we cannot

Member Data Documentation

bCutCoplanar

bool UE::Geometry::FMeshMeshCut::bCutCoplanar = false

If true, detect coplanar faces and re-triangulate so that the triangulations match 1:1 (TODO: not implemented!)

bMutuallyCut

bool UE::Geometry::FMeshMeshCut::bMutuallyCut = true

If true, modify both meshes to split at crossing points; otherwise only modify MeshA

bTrackInsertedVertices

bool UE::Geometry::FMeshMeshCut::bTrackInsertedVertices = false

If true, record vertex insertions

Mesh

FDynamicMesh3* UE::Geometry::FMeshMeshCut::Mesh[2]

Meshes to cut – note that FMeshMeshCut::Cut is destructive, so these are also outputs

SegmentToChain

TArray<int> UE::Geometry::FMeshMeshCut::SegmentToChain[2]

For each intersection segment, where the corresponding elements start in VertexChains. May contain IndexConstants::InvalidIndex for some segments, in cases where cutting a segment failed

Empty if bTrackInsertedVertices == false

SnapTolerance

double UE::Geometry::FMeshMeshCut::SnapTolerance = FMathf::ZeroTolerance * 100.0

Tolerance distance for considering a point to be on a vertex, edge or plane

VertexChains

TArray<int> UE::Geometry::FMeshMeshCut::VertexChains[2]

Outputs Packed chains of vertex IDs, representing the vertices for each segment in the mesh Packed as the number of vertices in that chain, followed by that many vertex ids, per segment NOT 1:1 w/ segments; some segments may have failed to insert

Empty if bTrackInsertedVertices == false

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The documentation for this class was generated from the following files:

• Engine/Source/Runtime/GeometryCore/Public/Operations/MeshMeshCut.h
• Engine/Source/Runtime/GeometryCore/Private/Operations/MeshMeshCut.cpp