UE::Geometry::FSplitAttributeWelder Class Reference

#include <SplitAttributeWelder.h>

Public Member Functions
	FSplitAttributeWelder ()
GEOMETRYCORE_API void	WeldSplitElements (FDynamicMesh3 &ParentMesh, const int32 ParentVID)
GEOMETRYCORE_API void	WeldSplitElements (FDynamicMesh3 &ParentMesh)

Static Public Member Functions
static GEOMETRYCORE_API void	WeldSplitUVs (const int32 ParentVID, FDynamicMeshUVOverlay &UVOverlay, float UVDistSqrdThreshold)
static GEOMETRYCORE_API void	WeldSplitUnitVectors (const int32 ParentVID, FDynamicMeshNormalOverlay &NormalOverlay, float DotThreshold, bool bMergeZeroVectors=true)
static GEOMETRYCORE_API void	WeldSplitColors (const int32 ParentVID, FDynamicMeshColorOverlay &ColorOverlay, float ColorDistSqrdThreshold)

Public Attributes
float	UVDistSqrdThreshold = 0.f
float	ColorDistSqrdThreshold = 0.f
float	NormalVecDotThreshold = 0.f
float	TangentVecDotThreshold = 0.f

Detailed Description

FSplitAttributeWelder can be used to weld split-attributes that share the same vertex in the parent mesh (e.g. split normals)

Constructor & Destructor Documentation

FSplitAttributeWelder()

UE::Geometry::FSplitAttributeWelder::FSplitAttributeWelder ( )

inline

Member Function Documentation

WeldSplitColors()

void FSplitAttributeWelder::WeldSplitColors ( const int32  ParentVID, FDynamicMeshColorOverlay &  ColorOverlay, float  ColorDistSqrdThreshold  )

static

Welds split colors shared by the ParentVID vertex in the ParentMesh.

Parameters

ParentVID	defines a vertex in the Parent Mesh
ColorOverlay	contains potentially split colors associated with the ParentVID. Assumed to be an overlay of the ParentMesh.
ColorDistSqrdThreshold	provides a threshold applied to the sum of the square differences between to colors. Used to determine if a weld should be preformed.

WeldSplitElements() [1/2]

void FSplitAttributeWelder::WeldSplitElements

(

FDynamicMesh3 &

ParentMesh

)

Weld split-elements across the entire mesh.

WeldSplitElements() [2/2]

void FSplitAttributeWelder::WeldSplitElements	(	FDynamicMesh3 &	ParentMesh,
		const int32	ParentVID
	)

Weld split-elements at the ParentVID in each overlay that are "close enough" as defined by the appropriate threshold.

WeldSplitUnitVectors()

void FSplitAttributeWelder::WeldSplitUnitVectors ( const int32  ParentVID, FDynamicMeshNormalOverlay &  NormalOverlay, float  DotThreshold, bool  bMergeZeroVectors = true  )

static

Welds split Normals / Tangents shared by the ParentVID vertex in the ParentMesh based on the angled between the vectors.

Parameters

ParentVID	defines a vertex in the Parent Mesh
NormalOverlay	contains potentially split vectors associated with the ParentVID. Assumed to be an overlay of the ParentMesh.
DotThreshold	provides a threshold for the dot product between two vectors that should be welded.
bMergeZeroVectors	will weld vectors that are too small to normalize.

WeldSplitUVs()

void FSplitAttributeWelder::WeldSplitUVs ( const int32  ParentVID, FDynamicMeshUVOverlay &  UVOverlay, float  UVDistSqrdThreshold  )

static

Welds split UVs shared by the ParentVID vertex in the ParentMesh.

Parameters

ParentVID	defines a vertex in the parent mesh.
UVOverlay	contains potentially split UVs associated with the ParentVID. Assumed to be an overlay of the ParentMesh.
UVDistSqrdThreshold	provides a threshold in distance squared UV space between split UVs that should be welded.

Member Data Documentation

ColorDistSqrdThreshold

float UE::Geometry::FSplitAttributeWelder::ColorDistSqrdThreshold = 0.f

Merge threshold used to compare Color Overlay elements Applied as (ColorA - ColorB).SizeSquared() <= ColorDistSqrdThreshold

NormalVecDotThreshold

float UE::Geometry::FSplitAttributeWelder::NormalVecDotThreshold = 0.f

Merge threshold used to compare Normal Overlay vectors. Applied as Abs(1 - VecA.dot.VecB) <= NormalVecDotThreshold.

TangentVecDotThreshold

float UE::Geometry::FSplitAttributeWelder::TangentVecDotThreshold = 0.f

Merge threshold used to compare Tangent (and BiTangent) Overlay vectors. Applied as Abs(1 - VecA.dot.VecB) <= TangentVecDotThreshold.

UVDistSqrdThreshold

float UE::Geometry::FSplitAttributeWelder::UVDistSqrdThreshold = 0.f

Merge threshold used to compare UV Overlay elements. Applied as FVector2f::DistSquared(UVA , UVB) <= UVDisSqrdThreshold

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

• Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/Operations/SplitAttributeWelder.h
• Engine/Source/Runtime/GeometryCore/Private/DynamicMesh/Operations/SplitAttributeWelder.cpp