QwtPointPolar Class Reference

A point in polar coordinates. More...

#include <qwt_point_polar.h>

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

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() [1/3]

QwtPointPolar::QwtPointPolar ( )

inline

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

See also

QPointF::isNull()

Definition at line 71 of file qwt_point_polar.h.

QwtPointPolar() [2/3]

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 83 of file qwt_point_polar.h.

QwtPointPolar() [3/3]

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 44 of file qwt_point_polar.cpp.

Member Function Documentation

normalized()

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 118 of file qwt_point_polar.cpp.

operator!=()

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 105 of file qwt_point_polar.cpp.

operator==()

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 90 of file qwt_point_polar.cpp.

setPoint()

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 54 of file qwt_point_polar.cpp.

toPoint()

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 68 of file qwt_point_polar.cpp.