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
           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 atimuth to atimuth.
       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

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()

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

   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()

   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()

   void QwtPointPolar::setPoint (const QPointF & p)
       Convert and assign values from a point in Cartesian coordinates

       Parameters:
           p Point in Cartesian coordinates

   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()

Author

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