QwtPointPolar - Man Page
A point in polar coordinates.
Synopsis
#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.
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::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::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::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
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.
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.
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.
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.
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.
Author
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