DGtal::Lemniscate2D< TSpace > Class Template Reference

Aim: Model of the concept StarShaped represents a lemniscate. More...

#include <DGtal/shapes/parametric/Lemniscate2D.h>

Inheritance diagram for DGtal::Lemniscate2D< TSpace >:

Public Types
typedef TSpace	Space
typedef Space::RealPoint	RealPoint
typedef Space::RealVector	RealVector
Public Types inherited from DGtal::StarShaped2D< TSpace >
typedef TSpace	Space
typedef Space::RealPoint	RealPoint

Public Member Functions
	Lemniscate2D ()=delete
	Lemniscate2D (const double x0, const double y0, const double a)
	Lemniscate2D (const RealPoint &aPoint, const double a)
	Lemniscate2D (const Lemniscate2D &other)
Lemniscate2D &	operator= (const Lemniscate2D &other)=delete
	~Lemniscate2D ()=default
RealPoint	getLowerBound () const
RealPoint	getUpperBound () const
RealPoint	center () const
void	moveTo (const RealPoint &newCenter)
double	parameter (const RealPoint &p) const
RealPoint	x (const double t) const
RealVector	xp (const double t) const
RealVector	xpp (const double t) const
void	selfDisplay (std::ostream &out) const
bool	isValid () const
Public Member Functions inherited from DGtal::StarShaped2D< TSpace >
	StarShaped2D ()=default
	StarShaped2D (const StarShaped2D &other)=delete
StarShaped2D &	operator= (const StarShaped2D &other)=delete
virtual	~StarShaped2D ()=default
virtual RealPoint	interiorPoint () const
Orientation	orientation (const RealPoint &p) const
RealPoint	tangent (const double t) const
RealPoint	normal (const double t) const
double	curvature (const double t) const
double	arclength (const double t1, double t2, const unsigned int nb) const
RealPoint	findIntersection (const RealPoint &inner, const RealPoint &outer, const double epsilon) const
RealPoint	closestPointWithWitnesses (const RealPoint &p, const RealPoint &left, const RealPoint &right, const int step) const
void	selfDisplay (std::ostream &out) const
bool	isValid () const

Private Member Functions
template<typename T >
bool	isAlmostEqual (T x, T y) const

Private Attributes
RealPoint	myCenter
double	myA

Detailed Description

template<typename TSpace>
class DGtal::Lemniscate2D< TSpace >

Aim: Model of the concept StarShaped represents a lemniscate.

Description of template class 'Lemniscate'

Definition at line 61 of file Lemniscate2D.h.

Member Typedef Documentation

RealPoint

template<typename TSpace >

typedef Space::RealPoint DGtal::Lemniscate2D< TSpace >::RealPoint

Definition at line 67 of file Lemniscate2D.h.

RealVector

template<typename TSpace >

typedef Space::RealVector DGtal::Lemniscate2D< TSpace >::RealVector

Definition at line 68 of file Lemniscate2D.h.

Space

template<typename TSpace >

typedef TSpace DGtal::Lemniscate2D< TSpace >::Space

Definition at line 66 of file Lemniscate2D.h.

Constructor & Destructor Documentation

Lemniscate2D() [1/4]

template<typename TSpace >

DGtal::Lemniscate2D< TSpace >::Lemniscate2D ( )

delete

Constructor. Forbidden by default.

Lemniscate2D() [2/4]

template<typename TSpace >

DGtal::Lemniscate2D< TSpace >::Lemniscate2D	(	const double	x0,
		const double	y0,
		const double	a
	)

Constructor. The absolute value of parameter a is used.

Parameters

x0	the x-coordinate of the lemniscate center.
y0	the y-coordinate of the lemniscate center.
a	semi-axis length along x-axis

Lemniscate2D() [3/4]

template<typename TSpace >

DGtal::Lemniscate2D< TSpace >::Lemniscate2D	(	const RealPoint &	aPoint,
		const double	a
	)

Constructor. The absolute value of parameter a is used. The absolute value of a parameters is used.

Parameters

aPoint	the lemniscate center
a	semi-axis length along x-axis

Lemniscate2D() [4/4]

template<typename TSpace >

DGtal::Lemniscate2D< TSpace >::Lemniscate2D

(

const Lemniscate2D< TSpace > &

other

)

Copy constructor.

Parameters

other

the object to clone.

~Lemniscate2D()

template<typename TSpace >

DGtal::Lemniscate2D< TSpace >::~Lemniscate2D ( )

default

Destructor.

Member Function Documentation

center()

template<typename TSpace >

RealPoint DGtal::Lemniscate2D< TSpace >::center ( ) const

inlinevirtual

Returns

the center of the star-shaped object.

Implements DGtal::StarShaped2D< TSpace >.

Definition at line 138 of file Lemniscate2D.h.

    {
      return myCenter;
    }

References DGtal::Lemniscate2D< TSpace >::myCenter.

getLowerBound()

template<typename TSpace >

RealPoint DGtal::Lemniscate2D< TSpace >::getLowerBound ( ) const

inlinevirtual

Returns

the lower bound of the shape bounding box.

Implements DGtal::StarShaped2D< TSpace >.

Definition at line 121 of file Lemniscate2D.h.

    {
      return RealPoint( myCenter[0] - myA, myCenter[1] - myA * 0.5 );
    }

References DGtal::Lemniscate2D< TSpace >::myA, and DGtal::Lemniscate2D< TSpace >::myCenter.

getUpperBound()

template<typename TSpace >

RealPoint DGtal::Lemniscate2D< TSpace >::getUpperBound ( ) const

inlinevirtual

Returns

the upper bound of the shape bounding box.

Implements DGtal::StarShaped2D< TSpace >.

Definition at line 130 of file Lemniscate2D.h.

    {
      return RealPoint( myCenter[0] + myA, myCenter[1] + myA * 0.5 );
    }

References DGtal::Lemniscate2D< TSpace >::myA, and DGtal::Lemniscate2D< TSpace >::myCenter.

isAlmostEqual()

template<typename TSpace >

template<typename T >

bool DGtal::Lemniscate2D< TSpace >::isAlmostEqual ( T  x, T  y  ) const

inlineprivate

Equality test using relative tolerance.

Definition at line 222 of file Lemniscate2D.h.

    {
      return std::abs(x - y) <= std::numeric_limits<T>::epsilon();
    }

isValid()

template<typename TSpace >

bool DGtal::Lemniscate2D< TSpace >::isValid

(

)

const

Checks the validity/consistency of the object.

Returns

'true' if the object is valid, 'false' otherwise.

moveTo()

template<typename TSpace >

void DGtal::Lemniscate2D< TSpace >::moveTo ( const RealPoint &  newCenter )

inlinevirtual

Modify the shape center

Parameters

newCenter

the new center position

Implements DGtal::StarShaped2D< TSpace >.

Definition at line 148 of file Lemniscate2D.h.

    {
      myCenter = newCenter;
    }

References DGtal::Lemniscate2D< TSpace >::myCenter.

operator=()

template<typename TSpace >

Lemniscate2D& DGtal::Lemniscate2D< TSpace >::operator= ( const Lemniscate2D< TSpace > &  other )

delete

Assignment.

Parameters

other

the object to copy.

Returns

a reference on 'this'. Forbidden by default.

parameter()

template<typename TSpace >

double DGtal::Lemniscate2D< TSpace >::parameter ( const RealPoint &  p ) const

virtual

Parameters

p	any point in the plane.

Returns

the angle parameter between 0 and 2*Pi corresponding to this point for the shape.

Implements DGtal::StarShaped2D< TSpace >.

selfDisplay()

template<typename TSpace >

void DGtal::Lemniscate2D< TSpace >::selfDisplay

(

std::ostream &

out

)

const

Writes/Displays the object on an output stream.

Parameters

out	the output stream where the object is written.

x()

template<typename TSpace >

RealPoint DGtal::Lemniscate2D< TSpace >::x ( const double  t ) const

virtual

Parameters

t	any angle between 0 and 2*Pi.

Returns

the vector (x(t),y(t)) which is the position on the shape boundary.

Implements DGtal::StarShaped2D< TSpace >.

xp()

template<typename TSpace >

RealVector DGtal::Lemniscate2D< TSpace >::xp ( const double  t ) const

virtual

Parameters

t	any angle between 0 and 2*Pi.

Returns

the vector (x'(t),y'(t)) which is the tangent to the shape boundary.

Implements DGtal::StarShaped2D< TSpace >.

xpp()

template<typename TSpace >

RealVector DGtal::Lemniscate2D< TSpace >::xpp ( const double  t ) const

virtual

Parameters

t	any angle between 0 and 2*Pi.

Returns

the vector (x''(t),y''(t)).

Implements DGtal::StarShaped2D< TSpace >.

Field Documentation

myA

template<typename TSpace >

double DGtal::Lemniscate2D< TSpace >::myA

private

Semi-axis length along x-axis

Definition at line 196 of file Lemniscate2D.h.

Referenced by DGtal::Lemniscate2D< TSpace >::getLowerBound(), and DGtal::Lemniscate2D< TSpace >::getUpperBound().

myCenter

template<typename TSpace >

RealPoint DGtal::Lemniscate2D< TSpace >::myCenter

private

Center of the circle.

Definition at line 191 of file Lemniscate2D.h.

Referenced by DGtal::Lemniscate2D< TSpace >::center(), DGtal::Lemniscate2D< TSpace >::getLowerBound(), DGtal::Lemniscate2D< TSpace >::getUpperBound(), and DGtal::Lemniscate2D< TSpace >::moveTo().

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

• Lemniscate2D.h