QwtClipper - Man Page
Some clipping algorithms.
Synopsis
Functions
QWT_EXPORT void clipPolygon (const QRect &, QPolygon &, bool closePolygon=false)
QWT_EXPORT void clipPolygon (const QRectF &, QPolygon &, bool closePolygon=false)
QWT_EXPORT void clipPolygonF (const QRectF &, QPolygonF &, bool closePolygon=false)
QWT_EXPORT QPolygon clippedPolygon (const QRect &, const QPolygon &, bool closePolygon=false)
QWT_EXPORT QPolygon clippedPolygon (const QRectF &, const QPolygon &, bool closePolygon=false)
QWT_EXPORT QPolygonF clippedPolygonF (const QRectF &, const QPolygonF &, bool closePolygon=false)
QWT_EXPORT QVector< QwtInterval > clipCircle (const QRectF &, const QPointF &, double radius)
Detailed Description
Some clipping algorithms.
Function Documentation
QVector< QwtInterval > QwtClipper::clipCircle (const QRectF & clipRect, const QPointF & center, double radius)
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
Definition at line 477 of file qwt_clipper.cpp.
QPolygon QwtClipper::clippedPolygon (const QRect & clipRect, const QPolygon & polygon, bool closePolygon = false)
Sutherland-Hodgman polygon clipping
- Parameters
clipRect Clip rectangle
polygon Polygon
closePolygon True, when the polygon is closed- Returns
Clipped polygon
Definition at line 437 of file qwt_clipper.cpp.
QPolygon QwtClipper::clippedPolygon (const QRectF & clipRect, const QPolygon & polygon, bool closePolygon = false)
Sutherland-Hodgman polygon clipping
- Parameters
clipRect Clip rectangle
polygon Polygon
closePolygon True, when the polygon is closed- Returns
Clipped polygon
Definition at line 420 of file qwt_clipper.cpp.
QPolygonF QwtClipper::clippedPolygonF (const QRectF & clipRect, const QPolygonF & polygon, bool closePolygon = false)
Sutherland-Hodgman polygon clipping
- Parameters
clipRect Clip rectangle
polygon Polygon
closePolygon True, when the polygon is closed- Returns
Clipped polygon
Definition at line 455 of file qwt_clipper.cpp.
void QwtClipper::clipPolygon (const QRect & clipRect, QPolygon & polygon, bool closePolygon = false)
Sutherland-Hodgman polygon clipping
- Parameters
clipRect Clip rectangle
polygon Polygon IN/OUT
closePolygon True, when the polygon is closed
Definition at line 390 of file qwt_clipper.cpp.
void QwtClipper::clipPolygon (const QRectF & clipRect, QPolygon & polygon, bool closePolygon = false)
Sutherland-Hodgman polygon clipping
- Parameters
clipRect Clip rectangle
polygon Polygon IN/OUT
closePolygon True, when the polygon is closed
Definition at line 369 of file qwt_clipper.cpp.
void QwtClipper::clipPolygonF (const QRectF & clipRect, QPolygonF & polygon, bool closePolygon = false)
Sutherland-Hodgman polygon clipping
- Parameters
clipRect Clip rectangle
polygon Polygon IN/OUT
closePolygon True, when the polygon is closed
Definition at line 404 of file qwt_clipper.cpp.
Author
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