QwtClipper Class Reference

Some clipping algorithms. More...

#include <qwt_clipper.h>

Static Public Member Functions
static QPolygon	clipPolygon (const QRect &, const QPolygon &, bool closePolygon=false)
static QPolygon	clipPolygon (const QRectF &, const QPolygon &, bool closePolygon=false)
static QPolygonF	clipPolygonF (const QRectF &, const QPolygonF &, bool closePolygon=false)
static QVector< QwtInterval >	clipCircle (const QRectF &, const QPointF &, double radius)

Detailed Description

Some clipping algorithms.

Member Function Documentation

clipCircle()

QVector< QwtInterval > QwtClipper::clipCircle ( const QRectF &  clipRect, const QPointF &  center, double  radius  )

static

Circle clipping

clipCircle() divides 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

clipPolygon() [1/2]

QPolygon QwtClipper::clipPolygon ( const QRect &  clipRect, const QPolygon &  polygon, bool  closePolygon = false  )

static

Sutherland-Hodgman polygon clipping

Parameters

clipRect	Clip rectangle
polygon	Polygon
closePolygon	True, when the polygon is closed

Returns

Clipped polygon

clipPolygon() [2/2]

QPolygon QwtClipper::clipPolygon ( const QRectF &  clipRect, const QPolygon &  polygon, bool  closePolygon = false  )

static

Sutherland-Hodgman polygon clipping

Parameters

clipRect	Clip rectangle
polygon	Polygon
closePolygon	True, when the polygon is closed

Returns

Clipped polygon

clipPolygonF()

QPolygonF QwtClipper::clipPolygonF ( const QRectF &  clipRect, const QPolygonF &  polygon, bool  closePolygon = false  )

static

Sutherland-Hodgman polygon clipping

Parameters

clipRect	Clip rectangle
polygon	Polygon
closePolygon	True, when the polygon is closed

Returns

Clipped polygon