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  3. UPolygonSelectionMechanic

UPolygonSelectionMechanic

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

API > API/Plugins > API/Plugins/ModelingComponents > API/Plugins/ModelingComponents/Selection

Inheritance Hierarchy

References

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

Syntax

UCLASS ()  
class UPolygonSelectionMechanic : public UMeshTopologySelectionMechanic

Remarks

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

Functions

  Type Name Description
Public function void

ConvertSelectionToBorderVertices ( bool bAsTriangleTopology
)

 Converts selection to a vertex/corner selection of just the boundary vertices/corners
Public function void Expands selection to encompass connected components.
Public function Const void

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

 Convert the Active Selection to a PolyGroup-topology FGeometrySelection, with optional CompactMaps
Public function Const void Convert the Active Selection to a Triangle-topology FGeometrySelection, with optional CompactMaps
Public function void

GrowSelection ( bool bAsTriangleTopology
)

 Expands selection at the borders.
Public function void

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

  
Public function void

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

  
Public function void Initialize the Active Selection based on the provided PolyGroup-topology FGeometrySelection
Public function void Initialize the Active Selection based on the provided Triangle-topology FGeometrySelection
Public function void

ShrinkSelection ( bool bAsTriangleTopology
)

 Shrinks selection at the borders.

Overridden from UMeshTopologySelectionMechanic

  Type Name Description
Public function Virtual bool

UpdateHighlight ( const FRay& WorldRay
)

 UMeshTopologySelectionMechanic.
Public function 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

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