QwtClipper Class Reference

Some clipping algos. More...

#include <qwt_clipper.h>

List of all members.

Static Public Member Functions

static QVector< QwtIntervalclipCircle (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)


Detailed Description

Some clipping algos.

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


Generated on Wed Jan 11 15:23:01 2012 for Qwt User's Guide by  doxygen 1.5.9