QwtClipper(3)

NAME
QwtClipper - Some clipping algos.

SYNOPSIS

#include <qwt_clipper.h>

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

Detailed Description

Some clipping algos.

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

Author

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