QwtPointPolar Class Reference

A point in polar coordinates. More...

#include <qwt_point_polar.h>

Public Member Functions
double	azimuth () const
	Returns the azimuth. More...
bool	isNull () const
	Returns true if radius() >= 0.0. More...
bool	isValid () const
	Returns true if radius() >= 0.0. More...
QwtPointPolar	normalized () const
bool	operator!= (const QwtPointPolar &) const
bool	operator== (const QwtPointPolar &) const
	Compare 2 points. More...
	QwtPointPolar ()
	QwtPointPolar (double azimuth, double radius)
	QwtPointPolar (const QwtPointPolar &)
	QwtPointPolar (const QPointF &)
double	radius () const
	Returns the radius. More...
double &	rAzimuth ()
	Returns the azimuth. More...
double &	rRadius ()
	Returns the radius. More...
void	setAzimuth (double)
	Sets the atimuth to atimuth. More...
void	setPoint (const QPointF &)
void	setRadius (double)
	Sets the radius to radius. More...
QPointF	toPoint () const

Private Attributes
double	d_azimuth
double	d_radius

Detailed Description

A point in polar coordinates.

In polar coordinates a point is determined by an angle and a distance. See http://en.wikipedia.org/wiki/Polar_coordinate_system

Definition at line 28 of file qwt_point_polar.h.

Constructor & Destructor Documentation

QwtPointPolar::QwtPointPolar ( )

inline

Constructs a null point, with a radius and azimuth set to 0.0.

See also

QPointF::isNull()

Definition at line 65 of file qwt_point_polar.h.

QwtPointPolar::QwtPointPolar ( double  azimuth, double  radius  )

inline

Constructs a point with coordinates specified by radius and azimuth.

Parameters

azimuth	Azimuth
radius	Radius

Definition at line 77 of file qwt_point_polar.h.

QwtPointPolar::QwtPointPolar ( const QwtPointPolar &  other )

inline

Constructs a point using the values of the point specified.

Parameters

other

Other point

Definition at line 87 of file qwt_point_polar.h.

QwtPointPolar::QwtPointPolar

(

const QPointF &

p

)

Convert and assign values from a point in Cartesian coordinates

Parameters

p	Point in Cartesian coordinates

See also

setPoint(), toPoint()

Definition at line 22 of file qwt_point_polar.cpp.

Member Function Documentation

double QwtPointPolar::azimuth ( ) const

inline

Returns the azimuth.

Definition at line 112 of file qwt_point_polar.h.

bool QwtPointPolar::isNull ( ) const

inline

Returns true if radius() >= 0.0.

Definition at line 100 of file qwt_point_polar.h.

bool QwtPointPolar::isValid ( ) const

inline

Returns true if radius() >= 0.0.

Definition at line 94 of file qwt_point_polar.h.

QwtPointPolar QwtPointPolar::normalized

(

)

const

Normalize radius and azimuth

When the radius is < 0.0 it is set to 0.0. The azimuth is a value >= 0.0 and < 2 * M_PI.

Returns

Normalized point

Definition at line 96 of file qwt_point_polar.cpp.

bool QwtPointPolar::operator!=

(

const QwtPointPolar &

other

)

const

Compare 2 points

Two points are equal to each other if radius and azimuth-coordinates are the same. Points are not equal, when the azimuth differs, but other.azimuth() == azimuth() % (2 * PI).

Returns

True if the point is not equal to other; otherwise return false.

See also

normalized()

Definition at line 83 of file qwt_point_polar.cpp.

bool QwtPointPolar::operator==

(

const QwtPointPolar &

other

)

const

Compare 2 points.

Two points are equal to each other if radius and azimuth-coordinates are the same. Points are not equal, when the azimuth differs, but other.azimuth() == azimuth() % (2 * PI).

Returns

True if the point is equal to other; otherwise return false.

See also

normalized()

Definition at line 68 of file qwt_point_polar.cpp.

double QwtPointPolar::radius ( ) const

inline

Returns the radius.

Definition at line 106 of file qwt_point_polar.h.

double & QwtPointPolar::rAzimuth ( )

inline

Returns the azimuth.

Definition at line 124 of file qwt_point_polar.h.

double & QwtPointPolar::rRadius ( )

inline

Returns the radius.

Definition at line 118 of file qwt_point_polar.h.

void QwtPointPolar::setAzimuth ( double  azimuth )

inline

Sets the atimuth to atimuth.

Definition at line 136 of file qwt_point_polar.h.

void QwtPointPolar::setPoint

(

const QPointF &

p

)

Convert and assign values from a point in Cartesian coordinates

Parameters

p	Point in Cartesian coordinates

Definition at line 32 of file qwt_point_polar.cpp.

void QwtPointPolar::setRadius ( double  radius )

inline

Sets the radius to radius.

Definition at line 130 of file qwt_point_polar.h.

QPointF QwtPointPolar::toPoint

(

)

const

Convert and return values in Cartesian coordinates

Returns

Converted point in Cartesian coordinates

Note

Invalid or null points will be returned as QPointF(0.0, 0.0)

See also

isValid(), isNull()

Definition at line 46 of file qwt_point_polar.cpp.

Member Data Documentation

double QwtPointPolar::d_azimuth

private

Definition at line 57 of file qwt_point_polar.h.

double QwtPointPolar::d_radius

private

Definition at line 58 of file qwt_point_polar.h.

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

• qwt_point_polar.h
• qwt_point_polar.cpp