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  3. UPolygonSelectionMechanic

UPolygonSelectionMechanic

[UPolygonSelectionMechanic](API\Plugins\ModelingComponents\UPolygonSelectionMechanic) implements the interaction for selecting a set of faces/vertices/edges from a FGroupTopology.

API > API/Plugins > API/Plugins/ModelingComponents

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

   
Name UPolygonSelectionMechanic
Type class
Header File /Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponents/Public/Selection/PolygonSelectionMechanic.h
Include Path #include "Selection/PolygonSelectionMechanic.h"

Syntax

UCLASS (MinimalAPI)  
class UPolygonSelectionMechanic : public UMeshTopologySelectionMechanic

Inheritance Hierarchy

Implements Interfaces

Variables

Protected

Name Type Remarks Include Path Unreal Specifiers
Topology const FGroupTopology * TODO: Would be nice to get rid of this and write everything in terms of TopologySelector and TopologyProvider. Selection/PolygonSelectionMechanic.h  

Functions

Public

Name Remarks Include Path Unreal Specifiers

void ConvertSelectionToBorderVertices ( bool bAsTriangleTopology
)

 Converts selection to a vertex/corner selection of just the boundary vertices/corners Selection/PolygonSelectionMechanic.h  

void FloodSelection()

 Expands selection to encompass connected components. Selection/PolygonSelectionMechanic.h  

void GetSelection_AsGroupTopology ( UE::Geometry::FGeometrySelection& SelectionOut,
const FCompactMaps* CompactMapsToApply
) const

 Convert the Active Selection to a PolyGroup-topology FGeometrySelection, with optional CompactMaps Selection/PolygonSelectionMechanic.h  

void GetSelection_AsTriangleTopology ( UE::Geometry::FGeometrySelection& SelectionOut,
const FCompactMaps* CompactMapsToApply
) const

 Convert the Active Selection to a Triangle-topology FGeometrySelection, with optional CompactMaps Selection/PolygonSelectionMechanic.h  

void GrowSelection ( bool bAsTriangleTopology
)

 Expands selection at the borders. Selection/PolygonSelectionMechanic.h  

void Initialize ( UDynamicMeshComponent* MeshComponent,
const FGroupTopology* Topology,
TFunction< FDynamicMeshAABBTree3*()> GetSpatialSourceFunc
)

   Selection/PolygonSelectionMechanic.h  

void Initialize ( const FDynamicMesh3* Mesh,
FTransform3d TargetTransform,
UWorld* World,
const FGroupTopology* Topology,
TFunction< FDynamicMeshAABBTree3*()> GetSpatialSourceFunc
)

   Selection/PolygonSelectionMechanic.h  

void SetSelection_AsGroupTopology ( const UE::Geometry::FGeometrySelection& Selection
)

 Initialize the Active Selection based on the provided PolyGroup-topology FGeometrySelection Selection/PolygonSelectionMechanic.h  

void SetSelection_AsTriangleTopology ( const UE::Geometry::FGeometrySelection& Selection
)

 Initialize the Active Selection based on the provided Triangle-topology FGeometrySelection Selection/PolygonSelectionMechanic.h  

void ShrinkSelection ( bool bAsTriangleTopology
)

 Shrinks selection at the borders. Selection/PolygonSelectionMechanic.h  

Overridden from UMeshTopologySelectionMechanic

Name Remarks Include Path Unreal Specifiers

virtual bool UpdateHighlight ( const FRay& WorldRay
)

 UMeshTopologySelectionMechanic. Selection/PolygonSelectionMechanic.h  

virtual 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 Selection/PolygonSelectionMechanic.h  

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