QwtClipper Class Reference

#include <qwt_clipper.h>

List of all members.

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

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Detailed Description

Some clipping algos.

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Member Function Documentation

QVector< QwtInterval > QwtClipper::clipCircle	(	const QRectF &	clipRect,
		const QPointF &	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

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

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