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FPolygroupSet

Polygroup sets can be stored in multiple places.

API > API/Plugins > API/Plugins/DynamicMesh

Polygroup sets can be stored in multiple places. The default location is in the per-triangle group integer stored directly on a FDynamicMesh3. Additional layers may be stored in the FDynamicMeshAttributeSet. Future iterations could store packed polygroups in other places, store them in separate arrays, and so on. FPolygroupSet can be used to abstract these different cases, by providing a standard Polygroup Get/Set API.

To support unique Polygroup ID allocation, FPolygroupSet calculates the maximum GroupID on creation, and updates this maximum across SetGroup() calls. AllocateNewGroupID() can be used to provide new unused GroupIDs. For consistency with FDynamicMesh3, MaxGroupID is set such that all GroupIDs are less than MaxGroupID

   
Name FPolygroupSet
Type struct
Header File /Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Polygroups/PolygroupSet.h
Include Path #include "Polygroups/PolygroupSet.h"

Syntax

struct FPolygroupSet

Constructors

Name Remarks Include Path Unreal Specifiers

FPolygroupSet ( const FDynamicMesh3* MeshIn
)

 Initialize a PolygroupSet for the given Mesh, and standard triangle group layer Polygroups/PolygroupSet.h  

FPolygroupSet ( const FPolygroupSet* CopyIn
)

 Initialize a PolygroupSet by copying an existing PolygroupSet Polygroups/PolygroupSet.h  

FPolygroupSet ( const FDynamicMesh3* MeshIn,
FPolygroupLayer GroupLayer
)

 Initialize a PolygroupSet for the given Mesh, and standard triangle group layer Polygroups/PolygroupSet.h  

FPolygroupSet ( const FDynamicMesh3* MeshIn,
const FDynamicMeshPolygroupAttribute* PolygroupAttribIn
)

 Initialize a PolygroupSet for given Mesh and specific Polygroup attribute layer Polygroups/PolygroupSet.h  

FPolygroupSet ( const FDynamicMesh3* MeshIn,
int32 PolygroupLayerIndex
)

 Initialize a PolygroupSet for given Mesh and specific Polygroup attribute layer, found by index. Polygroups/PolygroupSet.h  

FPolygroupSet ( const FDynamicMesh3* MeshIn,
FName AttribName
)

 Initialize a PolygroupSet for given Mesh and specific Polygroup attribute layer, found by name. Polygroups/PolygroupSet.h  

Variables

Public

Name Type Remarks Include Path Unreal Specifiers
GroupLayerIndex int32   Polygroups/PolygroupSet.h  
MaxGroupID int32   Polygroups/PolygroupSet.h  
Mesh const FDynamicMesh3 *   Polygroups/PolygroupSet.h  
PolygroupAttrib const FDynamicMeshPolygroupAttribute *   Polygroups/PolygroupSet.h  

Functions

Public

Name Remarks Include Path Unreal Specifiers

int32 AllocateNewGroupID()

 Allocate a new unused PolygroupID by incrementing the MaxGroupID member Polygroups/PolygroupSet.h  

int32 GetGroup ( int32 TriangleID
) const

   Polygroups/PolygroupSet.h  

const FDynamicMesh3 * GetMesh()

   Polygroups/PolygroupSet.h  

const FDynamicMeshPolygroupAttribute * GetPolygroup()

   Polygroups/PolygroupSet.h  

int32 GetPolygroupIndex()

   Polygroups/PolygroupSet.h  

int32 GetTriangleGroup ( int32 TriangleID
) const

   Polygroups/PolygroupSet.h  

void RecalculateMaxGroupID()

 Calculate the current maximum PolygroupID used in the active set and store in MaxGroupID member Polygroups/PolygroupSet.h  

void SetGroup ( int32 TriangleID,
int32 NewGroupID,
FDynamicMesh3& WritableMesh
)

 Set the PolygroupID for a TriangleID Polygroups/PolygroupSet.h  

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