QwtClipper (3) Linux Manual Page

QwtClipper –

Some clipping algorithms.

Synopsis

#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

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

QPolygon QwtClipper::clipPolygon (const QRect &clipRect, const QPolygon &polygon, boolclosePolygon = false) [static]

Sutherland-Hodgman polygon clipping

Parameters:

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

Returns:

Clipped polygon

QPolygon QwtClipper::clipPolygon (const QRectF &clipRect, const QPolygon &polygon, boolclosePolygon = 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, boolclosePolygon = false) [static]

Sutherland-Hodgman polygon clipping

Parameters:

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

Returns:

Clipped polygon

Author

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