TAttrBasedQuadricErrorV2

Configurable attributes with separate topology (wedges) Volume preservation Plane (Garland/Heckbert) and triangle quadrics (Lindstrom/Turk), including probabilistic versions (Trettner/Kobbelt)

API > API/Plugins > API/Plugins/DynamicMesh

Configurable attributes with separate topology (wedges) Volume preservation Plane (Garland/Heckbert) and triangle quadrics (Lindstrom/Turk), including probabilistic versions (Trettner/Kobbelt)

   
Name TAttrBasedQuadricErrorV2
Type class
Header File /Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/MeshSimplificationQuadrics.h
Include Path #include "MeshSimplificationQuadrics.h"

Syntax

template<typename RealType>  
class TAttrBasedQuadricErrorV2 : public UE::Geometry::TQuadricError< RealType >

Inheritance Hierarchy

Constructors

Name Remarks Include Path Unreal Specifiers

TAttrBasedQuadricErrorV2 ( const TVector< RealType >& P0,
const TVector< RealType >& P1,
const TVector< RealType >& P2,
const FOptions& Options
)

 Initialize a face quadric MeshSimplificationQuadrics.h  
Empty quadric MeshSimplificationQuadrics.h  
This should never be called. addition of vertex quadrics is not supported because it doesn't work for attribute wedges MeshSimplificationQuadrics.h  

TAttrBasedQuadricErrorV2 ( const TAttrBasedQuadricErrorV2& VertexQuadric0,
const TAttrBasedQuadricErrorV2& VertexQuadric1,
const TAttrBasedQuadricErrorV2* TriangleQuadricA,
const TAttrBasedQuadricErrorV2* TriangleQuadricB,
const int LocalEdgeIndexA,
const int LocalEdgeIndexB,
const RealType RemoveScale
)

 Initialize to an edge quadric given the two vertex quadrics at the end points of the edge and (up to two) face quadrics corresponding to the overlap of both MeshSimplificationQuadrics.h  

Classes

Name Remarks
FScopedAttributeDataBuilder Helper class to register attributes to the quadric on construction.

Structs

Name Remarks
FAttrWedgeQuadricData  
FOptions  

Enums

Public

Name Remarks
EQuadricVariant  

Typedefs

Name Type Remarks Include Path
BaseStruct TQuadricError< RealType >   MeshSimplificationQuadrics.h
FAttrArray TArray< TVector< RealType >, TInlineAllocator< InlineAttrElements > >   MeshSimplificationQuadrics.h

Constants

Name Type Remarks Include Path
InlineAttrElements uint32   MeshSimplificationQuadrics.h

Functions

Public

Name Remarks Include Path Unreal Specifiers

void AccumulateFaceQuadric ( const int CornerIdx,
RealType TriArea,
RealType Weight,
const TAttrBasedQuadricErrorV2& FaceQuadric
)

 If this is a vertex, accumulate a face quadric on to it. MeshSimplificationQuadrics.h  

bool CanCollapse()

 Is this a valid edge-collapse quadric? MeshSimplificationQuadrics.h  

FAttrArray ComputeAttributes ( const TVector< RealType >& P
) const

 Scale-correct attributes. MeshSimplificationQuadrics.h  

RealType Evaluate ( const TVector< RealType >& P
) const

 Combination of geometry and attribute quadrics MeshSimplificationQuadrics.h  

RealType EvaluateGeometryOnly ( const TVector< RealType >& P
) const

 Geometry quadrics only MeshSimplificationQuadrics.h  

RealType GetArea()

 Actual area, not the scaling term MeshSimplificationQuadrics.h  

int GetAttributeCount()

   MeshSimplificationQuadrics.h  

const FIndex3i & GetWedgeAttributeIndex ( int WedgeIndex
) const

   MeshSimplificationQuadrics.h  

int GetWedgeCount ( int AttributeIndex
) const

   MeshSimplificationQuadrics.h  

bool IsWedgeActive ( int WedgeIndex
) const

   MeshSimplificationQuadrics.h  

bool OptimalPoint ( UE::Math::TVector< RealType >& OutResult,
RealType MinThresh
) const

 The optimal point minimizing the quadric error with respect to a volume conserving constraint MeshSimplificationQuadrics.h  

void RemoveFaceQuadric ( const int CornerIdx,
RealType TriArea,
RealType RemoveScale,
const TAttrBasedQuadricErrorV2& FaceQuadric
)

 If this is a vertex, remove a face quadric from it (undoing accumulate face quadric) MeshSimplificationQuadrics.h  

void Scale ( RealType Wt
)

   MeshSimplificationQuadrics.h  

bool ValidateArea()

 For each attribute, checks whether the area of all wedges adds up to the total area of the quadric. MeshSimplificationQuadrics.h  

Protected

Name Remarks Include Path Unreal Specifiers

void AAddCrossProductSquaredTranspose ( const TVector< RealType >& V
)

   MeshSimplificationQuadrics.h  

void AAddOuterProduct ( const TVector< RealType >& V
)

 Set A to rank-1 matrix V \otimes V = V V^T. MeshSimplificationQuadrics.h  

void AScale ( const RealType Alpha
)

   MeshSimplificationQuadrics.h  

FAttrArray ComputeScaledAttributes ( const TVector< RealType >& P
) const

   MeshSimplificationQuadrics.h  

RealType Evaluate ( const TVector< RealType >& P,
const FAttrArray& ScaledWedgeAttrs
) const

   MeshSimplificationQuadrics.h  

void MakeProbabilisticPlaneQuadric ( const TVector< RealType >& P0,
const TVector< RealType >& P1,
const TVector< RealType >& P2,
const RealType SigmaN
)

   MeshSimplificationQuadrics.h  

void MakeProbabilisticTriangleQuadric ( const TVector< RealType >& P0,
const TVector< RealType >& P1,
const TVector< RealType >& P2,
const RealType SigmaN
)

   MeshSimplificationQuadrics.h  

void MakeTriangleQuadric ( const TVector< RealType >& P0,
const TVector< RealType >& P1,
const TVector< RealType >& P2
)

   MeshSimplificationQuadrics.h  

bool MergeVertexQuadricsToEdgeQuadric ( const TAttrBasedQuadricErrorV2& VertexQuadric0,
const TAttrBasedQuadricErrorV2& VertexQuadric1,
const TAttrBasedQuadricErrorV2* TriangleQuadricA,
const TAttrBasedQuadricErrorV2* TriangleQuadricB,
const int LocalEdgeIndexA,
const int LocalEdgeIndexB,
const RealType RemoveScale
)

   MeshSimplificationQuadrics.h  

bool OptimalPointImpl ( TVector< RealType >& OutResult
) const

   MeshSimplificationQuadrics.h  

Static

Name Remarks Include Path Unreal Specifiers

static TAttrBasedQuadricErrorV2 Zero()

   MeshSimplificationQuadrics.h  

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