DGtal::Astroid2D< TSpace > Class Template Reference

Aim: Model of the concept StarShaped represents an astroid. More...

#include <DGtal/shapes/parametric/Astroid2D.h>

Inheritance diagram for DGtal::Astroid2D< 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
	Astroid2D ()=delete
	Astroid2D (const double x0, const double y0, const double a, const double b)
	Astroid2D (const RealPoint &aPoint, const double a, const double b)
	Astroid2D (const Astroid2D &other)
Astroid2D &	operator= (const Astroid2D &other)=delete
	~Astroid2D ()=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
double	myB

Detailed Description

template<typename TSpace>
class DGtal::Astroid2D< TSpace >

Aim: Model of the concept StarShaped represents an astroid.

Description of template class 'Astroid2D'

Definition at line 61 of file Astroid2D.h.

Member Typedef Documentation

RealPoint

template<typename TSpace >

typedef Space::RealPoint DGtal::Astroid2D< TSpace >::RealPoint

Definition at line 67 of file Astroid2D.h.

RealVector

template<typename TSpace >

typedef Space::RealVector DGtal::Astroid2D< TSpace >::RealVector

Definition at line 68 of file Astroid2D.h.

Space

template<typename TSpace >

typedef TSpace DGtal::Astroid2D< TSpace >::Space

Definition at line 66 of file Astroid2D.h.

Constructor & Destructor Documentation

Astroid2D() [1/4]

template<typename TSpace >

DGtal::Astroid2D< TSpace >::Astroid2D ( )

delete

Constructor. Forbidden by default.

Astroid2D() [2/4]

template<typename TSpace >

DGtal::Astroid2D< TSpace >::Astroid2D	(	const double	x0,
		const double	y0,
		const double	a,
		const double	b
	)

Constructor. The absolute value of radii parameters is used.

Parameters

x0	the x-coordinate of the astroid center.
y0	the y-coordinate of the astroid center.
a	coefficient along x-axis
b	coefficient along y-axis

Astroid2D() [3/4]

template<typename TSpace >

DGtal::Astroid2D< TSpace >::Astroid2D	(	const RealPoint &	aPoint,
		const double	a,
		const double	b
	)

Constructor. The absolute value of radii parameters is used.

Parameters

aPoint	the astroid center
a	coefficient along x-axis
b	coefficient along y-axis

Astroid2D() [4/4]

template<typename TSpace >

DGtal::Astroid2D< TSpace >::Astroid2D

(

const Astroid2D< TSpace > &

other

)

Copy constructor.

Parameters

other

the object to clone.

~Astroid2D()

template<typename TSpace >

DGtal::Astroid2D< TSpace >::~Astroid2D ( )

default

Destructor.

Member Function Documentation

center()

template<typename TSpace >

RealPoint DGtal::Astroid2D< TSpace >::center ( ) const

inlinevirtual

Returns

the center of the star-shaped object.

Implements DGtal::StarShaped2D< TSpace >.

Definition at line 139 of file Astroid2D.h.

    {
      return myCenter;
    }

References DGtal::Astroid2D< TSpace >::myCenter.

Referenced by TEST_CASE().

getLowerBound()

template<typename TSpace >

RealPoint DGtal::Astroid2D< TSpace >::getLowerBound ( ) const

inlinevirtual

Returns

the lower bound of the shape bounding box.

Implements DGtal::StarShaped2D< TSpace >.

Definition at line 122 of file Astroid2D.h.

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

References DGtal::Astroid2D< TSpace >::myA, DGtal::Astroid2D< TSpace >::myB, and DGtal::Astroid2D< TSpace >::myCenter.

Referenced by digitize(), laplacian(), TEST_CASE(), and testDigitization().

getUpperBound()

template<typename TSpace >

RealPoint DGtal::Astroid2D< TSpace >::getUpperBound ( ) const

inlinevirtual

Returns

the upper bound of the shape bounding box.

Implements DGtal::StarShaped2D< TSpace >.

Definition at line 131 of file Astroid2D.h.

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

References DGtal::Astroid2D< TSpace >::myA, DGtal::Astroid2D< TSpace >::myB, and DGtal::Astroid2D< TSpace >::myCenter.

Referenced by digitize(), laplacian(), TEST_CASE(), and testDigitization().

isAlmostEqual()

template<typename TSpace >

template<typename T >

bool DGtal::Astroid2D< TSpace >::isAlmostEqual ( T  x, T  y  ) const

inlineprivate

Equality test using relative tolerance.

Definition at line 229 of file Astroid2D.h.

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

isValid()

template<typename TSpace >

bool DGtal::Astroid2D< 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::Astroid2D< TSpace >::moveTo ( const RealPoint &  newCenter )

inlinevirtual

Modify the shape center

Parameters

newCenter

the new center position

Implements DGtal::StarShaped2D< TSpace >.

Definition at line 149 of file Astroid2D.h.

    {
      myCenter = newCenter;
    }

References DGtal::Astroid2D< TSpace >::myCenter.

operator=()

template<typename TSpace >

Astroid2D& DGtal::Astroid2D< TSpace >::operator= ( const Astroid2D< TSpace > &  other )

delete

Assignment.

Parameters

other

the object to copy.

Returns

a reference on 'this'. Forbidden by default.

parameter()

template<typename TSpace >

double DGtal::Astroid2D< 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 >.

Referenced by TEST_CASE().

selfDisplay()

template<typename TSpace >

void DGtal::Astroid2D< 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::Astroid2D< 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 >.

Referenced by TEST_CASE().

xp()

template<typename TSpace >

RealVector DGtal::Astroid2D< 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 >.

Referenced by TEST_CASE().

xpp()

template<typename TSpace >

RealVector DGtal::Astroid2D< 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::Astroid2D< TSpace >::myA

private

Coefficient along x-axis

Definition at line 198 of file Astroid2D.h.

Referenced by DGtal::Astroid2D< TSpace >::getLowerBound(), and DGtal::Astroid2D< TSpace >::getUpperBound().

myB

template<typename TSpace >

double DGtal::Astroid2D< TSpace >::myB

private

Coefficient along y-axis

Definition at line 203 of file Astroid2D.h.

Referenced by DGtal::Astroid2D< TSpace >::getLowerBound(), and DGtal::Astroid2D< TSpace >::getUpperBound().

myCenter

template<typename TSpace >

RealPoint DGtal::Astroid2D< TSpace >::myCenter

private

Center of the circle.

Definition at line 193 of file Astroid2D.h.

Referenced by DGtal::Astroid2D< TSpace >::center(), DGtal::Astroid2D< TSpace >::getLowerBound(), DGtal::Astroid2D< TSpace >::getUpperBound(), and DGtal::Astroid2D< TSpace >::moveTo().

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

• Astroid2D.h