QwtPointPolar - A point in polar coordinates.

NAME  SYNOPSIS  Public Member Functions  Detailed Description  Constructor & Destructor Documentation  QwtPointPolar::QwtPointPolar () [inline]  QwtPointPolar::QwtPointPolar (double azimuth, double radius) [inline]  QwtPointPolar::QwtPointPolar (const QPointF & p)  Member Function Documentation  double QwtPointPolar::azimuth () const [inline]  bool QwtPointPolar::isNull () const [inline]  bool QwtPointPolar::isValid () const [inline]  QwtPointPolar QwtPointPolar::normalized () const  bool QwtPointPolar::operator!= (const QwtPointPolar & other) const  bool QwtPointPolar::operator== (const QwtPointPolar & other) const  double QwtPointPolar::radius () const [inline]  double & QwtPointPolar::rAzimuth () [inline]  double & QwtPointPolar::rRadius () [inline]  void QwtPointPolar::setAzimuth (double azimuth) [inline]  void QwtPointPolar::setPoint (const QPointF & p)  void QwtPointPolar::setRadius (double radius) [inline]  QPointF QwtPointPolar::toPoint () const  Author 

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NAME

QwtPointPolar − 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

double QwtPointPolar::azimuth () const [inline]

Returns the azimuth.

Definition at line 108 of file qwt_point_polar.h.

bool QwtPointPolar::isNull () const [inline]

Returns true if radius() >= 0.0.

Definition at line 96 of file qwt_point_polar.h.

bool QwtPointPolar::isValid () const [inline]

Returns true if radius() >= 0.0.

Definition at line 90 of file qwt_point_polar.h.

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.

double QwtPointPolar::radius () const [inline]

Returns the radius.

Definition at line 102 of file qwt_point_polar.h.

double & QwtPointPolar::rAzimuth () [inline]

Returns the azimuth.

Definition at line 120 of file qwt_point_polar.h.

double & QwtPointPolar::rRadius () [inline]

Returns the radius.

Definition at line 114 of file qwt_point_polar.h.

void QwtPointPolar::setAzimuth (double azimuth) [inline]

Sets the azimuth to azimuth.

Definition at line 132 of file qwt_point_polar.h.

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.

void QwtPointPolar::setRadius (double radius) [inline]

Sets the radius to radius.

Definition at line 126 of file qwt_point_polar.h.

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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