UPolygonSelectionMechanic | Unreal Engine 5.4 Documentation

Inheritance Hierarchy


Module	ModelingComponents
Header	/Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponents/Public/Selection/PolygonSelectionMechanic.h
Include	#include "Selection/PolygonSelectionMechanic.h"

UCLASS ()  
class UPolygonSelectionMechanic : public UMeshTopologySelectionMechanic

UPolygonSelectionMechanic implements the interaction for selecting a set of faces/vertices/edges from a FGroupTopology.

Type	Name	Description
void	GetSelection_AsGroupTopology ( UE::Geometry::FGeometrySelection& SelectionOut, const FCompactMaps* CompactMapsToApply )	Convert the Active Selection to a PolyGroup-topology FGeometrySelection, with optional CompactMaps
void	GetSelection_AsTriangleTopology ( UE::Geometry::FGeometrySelection& SelectionOut, const FCompactMaps* CompactMapsToApply )	Convert the Active Selection to a Triangle-topology FGeometrySelection, with optional CompactMaps
void	Initialize ( UDynamicMeshComponent* MeshComponent, const FGroupTopology* Topology, TFunction< FDynamicMeshAABBTree3*()> GetSpatialSourceFunc )
void	Initialize ( const FDynamicMesh3* Mesh, FTransform3d TargetTransform, UWorld* World, const FGroupTopology* Topology, TFunction< FDynamicMeshAABBTree3*()> GetSpatialSourceFunc )
void	SetSelection_AsGroupTopology ( const UE::Geometry::FGeometrySelection& Selection )	Initialize the Active Selection based on the provided PolyGroup-topology FGeometrySelection
void	SetSelection_AsTriangleTopology ( const UE::Geometry::FGeometrySelection& Selection )	Initialize the Active Selection based on the provided Triangle-topology FGeometrySelection

	Type	Name	Description
	bool	UpdateHighlight ( const FRay& WorldRay )	UMeshTopologySelectionMechanic.
	bool	UpdateSelection ( const FRay& WorldRay, FVector3d& LocalHitPositionOut, FVector3d& LocalHitNormalOut )	Selection API Intersect the ray with the mesh and update the selection based on the hit element, modifier states, etc