An approximation using a basis spline. More...

Inheritance diagram for QwtSplineBasis:

Public Member Functions
	QwtSplineBasis ()
	Constructor.

virtual	~QwtSplineBasis ()
	Destructor.

virtual QPainterPath	painterPath (const QPolygonF &) const override

virtual uint	locality () const override
	The locality is always 2.

Public Member Functions inherited from QwtSpline
	QwtSpline ()
	Constructor. More...

virtual	~QwtSpline ()
	Destructor.

void	setParametrization (int type)

void	setParametrization (QwtSplineParametrization *)

const QwtSplineParametrization *	parametrization () const

void	setBoundaryType (BoundaryType)

BoundaryType	boundaryType () const

void	setBoundaryValue (BoundaryPosition, double value)
	Define the boundary value. More...

double	boundaryValue (BoundaryPosition) const

void	setBoundaryCondition (BoundaryPosition, int condition)
	Define the condition for an endpoint of the spline. More...

int	boundaryCondition (BoundaryPosition) const

void	setBoundaryConditions (int condition, double valueBegin=0.0, double valueEnd=0.0)
	Define the condition at the endpoints of a spline. More...

virtual QPolygonF	polygon (const QPolygonF &, double tolerance) const
	Interpolate a curve by a polygon. More...

Additional Inherited Members
Public Types inherited from QwtSpline
enum	BoundaryType { ConditionalBoundaries , PeriodicPolygon , ClosedPolygon }

enum	BoundaryPosition { AtBeginning , AtEnd }

enum	BoundaryCondition { Clamped1 , Clamped2 , Clamped3 , LinearRunout }
	Boundary condition. More...

Detailed Description

An approximation using a basis spline.

QwtSplineBasis approximates a set of points by a polynomials with C2 continuity ( = first and second derivatives are equal ) at the end points.

The end points of the spline do not match the original points.

Definition at line 24 of file qwt_spline_basis.h.

Member Function Documentation

QPainterPath QwtSplineBasis::painterPath ( const QPolygonF & points ) const

overridevirtual

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

Parameters

points Control points

Implements QwtSpline.

Definition at line 249 of file qwt_spline_basis.cpp.