An approximation using a basis spline. More...

Inheritance diagram for QwtSplineBasis:

Public Member Functions
virtual uint	locality () const QWT_OVERRIDE
	The locality is always 2. More...

virtual QPainterPath	painterPath (const QPolygonF &) const QWT_OVERRIDE

	QwtSplineBasis ()
	Constructor. More...

virtual	~QwtSplineBasis ()
	Destructor. More...

Public Member Functions inherited from QwtSpline
int	boundaryCondition (BoundaryPosition) const

BoundaryType	boundaryType () const

double	boundaryValue (BoundaryPosition) const

const QwtSplineParametrization *	parametrization () const

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

	QwtSpline ()
	Constructor. More...

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

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

void	setBoundaryType (BoundaryType)

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

void	setParametrization (int type)

void	setParametrization (QwtSplineParametrization *)

virtual	~QwtSpline ()
	Destructor. More...

Additional Inherited Members
Public Types inherited from QwtSpline
enum	BoundaryCondition { Clamped1, Clamped2, Clamped3, LinearRunout }
	Boundary condition. More...

enum	BoundaryPosition { AtBeginning, AtEnd }

enum	BoundaryType { ConditionalBoundaries, PeriodicPolygon, ClosedPolygon }

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.

Constructor & Destructor Documentation

QwtSplineBasis::QwtSplineBasis ( )

Constructor.

Definition at line 227 of file qwt_spline_basis.cpp.

QwtSplineBasis::~QwtSplineBasis ( )

virtual

Destructor.

Definition at line 232 of file qwt_spline_basis.cpp.

uint QwtSplineBasis::locality ( ) const

virtual

The locality is always 2.

Reimplemented from QwtSpline.

Definition at line 237 of file qwt_spline_basis.cpp.

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

virtual

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.

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