QwtPointPolar (3)

#include <qwt_point_polar.h>

Public Member Functions

QwtPointPolar ()

QwtPointPolar (double azimuth, double radius)

QwtPointPolar (const QwtPointPolar &)

QwtPointPolar (const QPointF &)

void setPoint (const QPointF &)

QPointF toPoint () const

bool isValid () const

bool isNull () const

double radius () const

double azimuth () const

double & rRadius ()

double & rAzimuth ()

void setRadius (double)

void setAzimuth (double)

bool operator== (const QwtPointPolar &) const

bool operator!= (const QwtPointPolar &) const

QwtPointPolar normalized () const

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

QwtPointPolar::QwtPointPolar ()\fC [inline]\fP Constructs a null point, with a radius and azimuth set to 0.0.

See also:

QPointF::isNull

QwtPointPolar::QwtPointPolar (doubleazimuth, doubleradius)\fC [inline]\fP Constructs a point with coordinates specified by radius and azimuth.

Parameters:

azimuth Azimuth

radius Radius

QwtPointPolar::QwtPointPolar (const \fBQwtPointPolar\fP &other)\fC [inline]\fP 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()

double QwtPointPolar::azimuth () const\fC [inline]\fP

Returns the azimuth.

bool QwtPointPolar::isNull () const\fC [inline]\fP

Returns true if radius() >= 0.0.

bool QwtPointPolar::isValid () const\fC [inline]\fP

Returns true if radius() >= 0.0.

\fBQwtPointPolar\fP 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 \fBQwtPointPolar\fP &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 \fBQwtPointPolar\fP &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\fC [inline]\fP

Returns the radius.

double & QwtPointPolar::rAzimuth ()\fC [inline]\fP

Returns the azimuth.

double & QwtPointPolar::rRadius ()\fC [inline]\fP

Returns the radius.

void QwtPointPolar::setAzimuth (doubleazimuth)\fC [inline]\fP

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 (doubleradius)\fC [inline]\fP

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()

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