QwtPointPolar Class Reference

#include <qwt_point_polar.h>

List of all members.

Public Member Functions
double	azimuth () const
bool	isNull () const
bool	isValid () const
QwtPointPolar	normalized () const
bool	operator!= (const QwtPointPolar &) const
bool	operator== (const QwtPointPolar &) const
	QwtPointPolar ()
	QwtPointPolar (double azimuth, double radius)
	QwtPointPolar (const QwtPointPolar &)
	QwtPointPolar (const QPointF &)
double	radius () const
double &	rAzimuth ()
double &	rRadius ()
void	setAzimuth (double)
void	setPoint (const QPointF &)
void	setRadius (double)
QPointF	toPoint () 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

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Constructor & Destructor Documentation

QwtPointPolar::QwtPointPolar

(

)

[inline]

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

See also:

QPointF::isNull

QwtPointPolar::QwtPointPolar	(	double	azimuth,
		double	radius
	)		[inline]

Constructs a point with coordinates specified by radius and azimuth.

Parameters:

azimuth	Azimuth
radius	Radius

QwtPointPolar::QwtPointPolar

(

const QwtPointPolar &

other

)

[inline]

Constructs a point using the values of the point specified.

Parameters:

other

Other point

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()

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Member Function Documentation

double QwtPointPolar::azimuth

(

)

const [inline]

Returns the azimuth.

bool QwtPointPolar::isNull

(

)

const [inline]

Returns true if radius() >= 0.0.

bool QwtPointPolar::isValid

(

)

const [inline]

Returns true if radius() >= 0.0.

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.

bool QwtPointPolar::operator!=

(

const QwtPointPolar &

other

)

const

Returns true if point1 is not equal to point2; otherwise returns false.

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).

See also:

normalized()

bool QwtPointPolar::operator==

(

const QwtPointPolar &

other

)

const

Returns true if point1 is equal to point2; otherwise returns false.

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).

See also:

normalized()

double QwtPointPolar::radius

(

)

const [inline]

Returns the radius.

double & QwtPointPolar::rAzimuth

(

)

[inline]

Returns the azimuth.

double & QwtPointPolar::rRadius

(

)

[inline]

Returns the radius.

void QwtPointPolar::setAzimuth

(

double

azimuth

)

[inline]

Sets the atimuth to atimuth.

void QwtPointPolar::setPoint

(

const QPointF &

p

)

Convert and assign values from a point in Cartesian coordinates

Parameters:

p	Point in Cartesian coordinates

void QwtPointPolar::setRadius

(

double

radius

)

[inline]

Sets the radius to radius.

QPointF QwtPointPolar::toPoint

(

)

const

Convert and return values in Cartesian coordinates

Note:

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

See also:

isValid(), isNull()