QwtSplinePleasing Class Reference

A spline with G1 continuity. More...

#include <qwt_spline_pleasing.h>

Inheritance diagram for QwtSplinePleasing:

List of all members.

Public Member Functions
virtual QVector< QLineF >	bezierControlLines (const QPolygonF &points) const
	Interpolate a curve with Bezier curves.
virtual uint	locality () const
virtual QPainterPath	painterPath (const QPolygonF &) const
	Interpolate a curve with Bezier curves.
	QwtSplinePleasing ()
	Constructor.
virtual	~QwtSplinePleasing ()
	Destructor.

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Detailed Description

A spline with G1 continuity.

QwtSplinePleasing is some sort of cardinal spline, with non C1 continous extra rules for narrow angles. It has a locality of 2.

Note:

The algorithm is the one offered by a popular office package.

Definition at line 23 of file qwt_spline_pleasing.h.

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Constructor & Destructor Documentation

QwtSplinePleasing::QwtSplinePleasing

(

)

Constructor.

The default setting is a non closing spline with uniform parametrization. ( QwtSplineParametrization::ParameterUniform ).

See also:

QwtSpline::setParametrization(), QwtSpline::setBoundaryType()

Definition at line 263 of file qwt_spline_pleasing.cpp.

QwtSplinePleasing::~QwtSplinePleasing

(

)

[virtual]

Destructor.

Definition at line 269 of file qwt_spline_pleasing.cpp.

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Member Function Documentation

QVector< QLineF > QwtSplinePleasing::bezierControlLines

(

const QPolygonF &

points

)

const [virtual]

Interpolate a curve with Bezier curves.

Interpolates a polygon piecewise with cubic Bezier curves and returns the 2 control points of each curve as QLineF.

Parameters:

points

Control points

Returns:

Control points of the interpolating Bezier curves

Implements QwtSplineInterpolating.

Definition at line 325 of file qwt_spline_pleasing.cpp.

uint QwtSplinePleasing::locality

(

)

const [virtual]

Returns:

2

Reimplemented from QwtSpline.

Definition at line 274 of file qwt_spline_pleasing.cpp.

QPainterPath QwtSplinePleasing::painterPath

(

const QPolygonF &

points

)

const [virtual]

Interpolate a curve with Bezier curves.

Interpolates a polygon piecewise with cubic Bezier curves and returns them as QPainterPath.

Parameters:

points

Control points

Returns:

QPainterPath Painter path, that can be rendered by QPainter

Reimplemented from QwtSplineInterpolating.

Definition at line 288 of file qwt_spline_pleasing.cpp.

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The documentation for this class was generated from the following files:

• qwt_spline_pleasing.h
• qwt_spline_pleasing.cpp