UDocumentation UE5.7 10.02.2026 (Source)
API documentation for Unreal Engine 5.7
Classes | Public Member Functions | Static Public Member Functions | Public Attributes | List of all members
FMeshRenderDecomposition Class Reference

#include <MeshRenderDecomposition.h>

Classes

struct  FGroup
 

Public Member Functions

 FMeshRenderDecomposition (FMeshRenderDecomposition &&)=default
 
FMeshRenderDecomposition & operator= (FMeshRenderDecomposition &&)=default
 
 FMeshRenderDecomposition ()=default
 
 FMeshRenderDecomposition (const FMeshRenderDecomposition &)=delete
 
FMeshRenderDecomposition & operator= (const FMeshRenderDecomposition &)=delete
 
void Initialize (int32 Count)
 
int32 AppendGroup ()
 
int32 Num () const
 
bool IsGroup (int32 Index) const
 
FGroup & GetGroup (int32 Index)
 
const FGroup & GetGroup (int32 Index) const
 
int32 GetGroupForTriangle (int32 TriangleID) const
 
GEOMETRYFRAMEWORK_API void BuildAssociations (const FDynamicMesh3 *Mesh)
 

Static Public Member Functions

static GEOMETRYFRAMEWORK_API void BuildMaterialDecomposition (const FDynamicMesh3 *Mesh, const FComponentMaterialSet *MaterialSet, FMeshRenderDecomposition &Decomp)
 
static GEOMETRYFRAMEWORK_API void BuildChunkedDecomposition (const FDynamicMesh3 *Mesh, const FComponentMaterialSet *MaterialSet, FMeshRenderDecomposition &Decomp, int32 MaxChunkSize=1<< 14)
 

Public Attributes

TArray< TUniquePtr< FGroup > > Groups
 
TArray< int32 > TriangleToGroupMap
 

Detailed Description

FMeshRenderDecomposition represents a decomposition of a mesh into "chunks" of triangles, with associated materials. This is passed to the rendering components to split a mesh into multiple RenderBuffers, for more efficient updating.

Constructor & Destructor Documentation

◆ FMeshRenderDecomposition() [1/3]

FMeshRenderDecomposition::FMeshRenderDecomposition ( FMeshRenderDecomposition &&  )
default

◆ FMeshRenderDecomposition() [2/3]

FMeshRenderDecomposition::FMeshRenderDecomposition ( )
default

◆ FMeshRenderDecomposition() [3/3]

FMeshRenderDecomposition::FMeshRenderDecomposition ( const FMeshRenderDecomposition &  )
delete

Member Function Documentation

◆ AppendGroup()

int32 FMeshRenderDecomposition::AppendGroup ( )
inline

◆ BuildAssociations()

void FMeshRenderDecomposition::BuildAssociations ( const FDynamicMesh3 *  Mesh)

Construct mappings between mesh and groups (eg TriangleToGroupMap)

◆ BuildChunkedDecomposition()

void FMeshRenderDecomposition::BuildChunkedDecomposition ( const FDynamicMesh3 *  Mesh,
const FComponentMaterialSet *  MaterialSet,
FMeshRenderDecomposition &  Decomp,
int32  MaxChunkSize = 1 << 14 
)
static

Build per-material decomposition, and then split each of those into chunks of at most MaxChunkSize (actual chunk sizes will be highly variable and some may be very small...)

◆ BuildMaterialDecomposition()

void FMeshRenderDecomposition::BuildMaterialDecomposition ( const FDynamicMesh3 *  Mesh,
const FComponentMaterialSet *  MaterialSet,
FMeshRenderDecomposition &  Decomp 
)
static

Build decomposition with one group for each MaterialID of mesh

◆ GetGroup() [1/2]

FGroup & FMeshRenderDecomposition::GetGroup ( int32  Index)
inline

◆ GetGroup() [2/2]

const FGroup & FMeshRenderDecomposition::GetGroup ( int32  Index) const
inline

◆ GetGroupForTriangle()

int32 FMeshRenderDecomposition::GetGroupForTriangle ( int32  TriangleID) const
inline

◆ Initialize()

void FMeshRenderDecomposition::Initialize ( int32  Count)
inline

◆ IsGroup()

bool FMeshRenderDecomposition::IsGroup ( int32  Index) const
inline

◆ Num()

int32 FMeshRenderDecomposition::Num ( ) const
inline

◆ operator=() [1/2]

FMeshRenderDecomposition & FMeshRenderDecomposition::operator= ( const FMeshRenderDecomposition &  )
delete

◆ operator=() [2/2]

FMeshRenderDecomposition & FMeshRenderDecomposition::operator= ( FMeshRenderDecomposition &&  )
default

Member Data Documentation

◆ Groups

TArray<TUniquePtr<FGroup> > FMeshRenderDecomposition::Groups

◆ TriangleToGroupMap

TArray<int32> FMeshRenderDecomposition::TriangleToGroupMap

Mapping from TriangleID to Groups array index. Initialized by BuildAssociations()

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