#include <qwt_spline_approximation.h>

Classes
class	PrivateData
Public Types
enum	BoundaryType { ConditionalBoundaries, PeriodicPolygon, ClosedPolygon }
Public Member Functions
BoundaryType	boundaryType () const
virtual uint	locality () const
virtual QPainterPath	painterPath (const QPolygonF &) const =0
const QwtSplineParametrization *	parametrization () const
	QwtSplineApproximation ()
	Constructor.
void	setBoundaryType (BoundaryType)
void	setParametrization (int type)
void	setParametrization (QwtSplineParametrization *)
virtual	~QwtSplineApproximation ()
	Destructor.
Private Attributes
PrivateData *	d_data

Detailed Description

Definition at line 18 of file qwt_spline_approximation.h.

Member Enumeration Documentation

enum QwtSplineApproximation::BoundaryType

Enumerator:

ConditionalBoundaries

PeriodicPolygon

ClosedPolygon

ClosedPolygon is similar to PeriodicPolygon beside, that the interpolation includes the connection between the last and the first control point.

Note:: Only works for parametrizations, where the parameter increment for the the final closing line is positive. This excludes QwtSplineParametrization::ParameterX and QwtSplineParametrization::ParameterY

Definition at line 21 of file qwt_spline_approximation.h.

Constructor & Destructor Documentation

QwtSplineApproximation::QwtSplineApproximation ( )

Constructor.

The default setting is a non closing spline with chordal parametrization

See also:: setParametrization(), setClosing()

Definition at line 39 of file qwt_spline_approximation.cpp.

QwtSplineApproximation::~QwtSplineApproximation ( ) [virtual]

Destructor.

Definition at line 45 of file qwt_spline_approximation.cpp.

Member Function Documentation

QwtSplineApproximation::BoundaryType QwtSplineApproximation::boundaryType ( ) const

Definition at line 96 of file qwt_spline_approximation.cpp.

uint QwtSplineApproximation::locality ( ) const [virtual]

The locality of an spline interpolation identifies how many adjacent polynoms are affected, when changing the position of one point.

A locality of 'n' means, that changing the coordinates of a point has an effect on 'n' leading and 'n' following polynoms. Those polynoms can be calculated from a local subpolygon.

A value of 0 means, that the interpolation is not local and any modification of the polygon requires to recalculate all polynoms ( f.e cubic splines ).