QwtClipper Class Reference

#include <qwt_clipper.h>

List of all members.

Static Public Member Functions
static QwtArray < QwtDoubleInterval >	clipCircle (const QwtDoubleRect &, const QwtDoublePoint &, double radius)
static QwtPolygon	clipPolygon (const QRect &, const QwtPolygon &)
static QwtPolygonF	clipPolygonF (const QwtDoubleRect &, const QwtPolygonF &)

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Detailed Description

Some clipping algos.

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Member Function Documentation

QwtArray< QwtDoubleInterval > QwtClipper::clipCircle ( const QwtDoubleRect &  clipRect, const QwtDoublePoint &  center, double  radius  )

static

Circle clipping

clipCircle() devides a circle into intervals of angles representing arcs of the circle. When the circle is completely inside the clip rectangle an interval [0.0, 2 * M_PI] is returned.

Parameters:

clipRect	Clip rectangle
center	Center of the circle
radius	Radius of the circle

Returns:

Arcs of the circle

QwtPolygon QwtClipper::clipPolygon ( const QRect &  clipRect, const QwtPolygon &  polygon  )

static

Sutherland-Hodgman polygon clipping

Parameters:

clipRect	Clip rectangle
polygon	Polygon

Returns:

Clipped polygon

QwtPolygonF QwtClipper::clipPolygonF ( const QwtDoubleRect &  clipRect, const QwtPolygonF &  polygon  )

static

Sutherland-Hodgman polygon clipping

Parameters:

clipRect	Clip rectangle
polygon	Polygon

Returns:

Clipped polygon