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  3. TQuadricError

TQuadricError

QuadricError represents a quadratic function that evaluates distance to plane.

API > API/Runtime > API/Runtime/GeometryCore

Inheritance Hierarchy

References

   
Module GeometryCore
Header /Engine/Source/Runtime/GeometryCore/Public/QuadricError.h
Include #include "QuadricError.h"

Syntax

template<typename RealType>  
struct TQuadricError

Remarks

QuadricError represents a quadratic function that evaluates distance to plane. Stores minimal 10-coefficient form, following http://mgarland.org/files/papers/qtheory.pdf (symmetric matrix A, vector b, constant c)

Variables

  Type Name Description
Public variable RealType Axx  
Public variable RealType Axy  
Public variable RealType Axz  
Public variable RealType Ayy  
Public variable RealType Ayz  
Public variable RealType Azz  
Public variable RealType bx  
Public variable RealType by  
Public variable RealType bz  
Public variable RealType c  

Constructors

  Type Name Description
Public function    
Public function  

TQuadricError ( const TVector< RealType >& Normal,
const TVector< RealType >& Point
)

 Construct TQuadricError a plane with the given normal and a point on plane
Public function  

TQuadricError ( const TQuadricError& a,
const TQuadricError& b
)

 Construct TQuadricError that is the sum of two other TQuadricErrors

Functions

  Type Name Description
Public function void

Add ( const TQuadricError& b
)

  
Public function void

Add ( RealType w,
const TQuadricError& b
)

 Add scalar multiple of a TQuadricError to this TQuadricError
Public function void  
Public function Const RealType

Evaluate ( const UE::Math::TVector< RealType >& pt
)

 Evaluates p*A*p + 2*dot(p,b) + c
Public function Static bool

InvertSymmetricMatrix ( const RealType SM,
RealType InvSM,
RealType minThresh
)

  
Public function Const TVector< RealType >

MultiplyA ( const UE::Math::TVector< RealType >& pt
)

  
Public function Static TVector< RealType >

MultiplySymmetricMatrix ( const RealType SM,
const UE::Math::TVector< RealType >& vec
)

  
Public function Static TVector< RealType >

MultiplySymmetricMatrix ( const RealType SM,
const RealType vec
)

  
Public function Const bool

OptimalPoint ( UE::Math::TVector< RealType >& OutResult,
RealType minThresh
)

  
Public function void

Scale ( RealType w
)

 Scale this quadric by the weight 'w'
Public function Const bool

SolveAxEqualsb ( UE::Math::TVector< RealType >& OutResult,
const RealType bvecx,
const RealType bvecy,
const RealType bvecz,
const RealType minThresh
)

  
Public function void

Subtract ( const TQuadricError& b
)

  
Public function void  
Public function Static TQuadricError

Zero ()

  

Typedefs

Name Description
ScalarType  

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