QwtPointPolar(3) Qwt User's Guide QwtPointPolar(3)
NAME
QwtPointPolar -
A point in polar coordinates.
SYNOPSIS
#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
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
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 (doubleazimuth, doubleradius) [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()
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 (doubleazimuth) [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 (doubleradius) [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()
Author
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Version 6.0.0 Fri Apr 15 2011 QwtPointPolar(3)