DGtal::detail::AffineGeometryScalarOperations< double > Struct Reference

Aim: Internal class used by AffineGeometry to differentiate operations on lattice points and operations on points with floating-point coordinates. This specialization assume double for coordinates. More...

#include <DGtal/geometry/tools/AffineGeometry.h>

Static Public Member Functions
static std::pair< double, double >	getMultipliers (double a, double b)
static double	gcd (double, double)
static double	lcmPositive (double, double)
static bool	isNonZero (double x, double tol)

Friends
template<typename T >
struct	DGtal::AffineGeometry
template<typename T >
struct	DGtal::AffineBasis

Detailed Description

Aim: Internal class used by AffineGeometry to differentiate operations on lattice points and operations on points with floating-point coordinates. This specialization assume double for coordinates.

Description of template class 'AffineGeometryScalarOperations'

Definition at line 270 of file AffineGeometry.h.

Member Function Documentation

gcd()

static double DGtal::detail::AffineGeometryScalarOperations< double >::gcd ( double  , double    )

inlinestatic

Returns

1.0

Definition at line 290 of file AffineGeometry.h.

      {
        return 1.0;
      }

getMultipliers()

static std::pair< double, double > DGtal::detail::AffineGeometryScalarOperations< double >::getMultipliers ( double  a, double  b  )

inlinestatic

Parameters

[in]	a	any number
[in]	b	any number

Returns

the pair ( b, a ), which allows to cancel a component in a Gauss pivoting algorithm.

Definition at line 281 of file AffineGeometry.h.

      {
        return (b >= 0 )
          ? std::make_pair( b, a )
          : std::make_pair( -b, -a );
      }

isNonZero()

static bool DGtal::detail::AffineGeometryScalarOperations< double >::isNonZero ( double  x, double  tol  )

inlinestatic

Parameters

[in]	x	any number
[in]	tol	the accepted tolerance value below which the number is considered null (typically 1e-12).

Returns

'true' iff x is non zero.

Definition at line 310 of file AffineGeometry.h.

      {
        return ( x > tol ) || ( x < -tol );
      }

lcmPositive()

static double DGtal::detail::AffineGeometryScalarOperations< double >::lcmPositive ( double  , double    )

inlinestatic

Returns

1.0

Definition at line 297 of file AffineGeometry.h.

      {
        return 1.0;
      }

Friends And Related Symbol Documentation

DGtal::AffineBasis

template<typename T >

friend struct DGtal::AffineBasis

friend

Definition at line 273 of file AffineGeometry.h.

DGtal::AffineGeometry

template<typename T >

friend struct DGtal::AffineGeometry

friend

Definition at line 272 of file AffineGeometry.h.

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The documentation for this struct was generated from the following file:

• AffineGeometry.h