QwtClipper - Man Page
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, 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
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
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
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
Author
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