QwtSplineCubic Class Reference

A cubic spline. More...

#include <qwt_spline_cubic.h>

Inheritance diagram for QwtSplineCubic:

Classes
class	PrivateData

Public Member Functions
	QwtSplineCubic ()
	Constructor.
virtual	~QwtSplineCubic ()
	Destructor.
virtual uint	locality () const override
	Get locality (always 0 - non-local)
virtual QPainterPath	painterPath (const QPolygonF &) const override
	Get painter path from polygon.
virtual QVector< QLineF >	bezierControlLines (const QPolygonF &points) const override
	Get Bezier control lines.
virtual QVector< QwtSplinePolynomial >	polynomials (const QPolygonF &) const override
	Get polynomials from polygon.
virtual QVector< double >	slopes (const QPolygonF &) const override
	Get slopes at control points.
virtual QVector< double >	curvatures (const QPolygonF &) const override
	Get curvatures at control points.
Public Member Functions inherited from QwtSplineC2
	QwtSplineC2 ()
	Constructor.
virtual	~QwtSplineC2 ()
	Destructor .
virtual QPolygonF	equidistantPolygon (const QPolygonF &, double distance, bool withNodes) const override
	Find an interpolated polygon with "equidistant" points.
Public Member Functions inherited from QwtSplineC1
	QwtSplineC1 ()
	Constructor.
virtual	~QwtSplineC1 ()
	Destructor .
virtual double	slopeAtBeginning (const QPolygonF &, double slopeNext) const
	Calculate the slope at the beginning of the spline.
virtual double	slopeAtEnd (const QPolygonF &, double slopeBefore) const
	Calculate the slope at the end of the spline.
Public Member Functions inherited from QwtSplineG1
	QwtSplineG1 ()
	Constructor .
virtual	~QwtSplineG1 ()
	Destructor .
Public Member Functions inherited from QwtSplineInterpolating
	QwtSplineInterpolating ()
	Constructor .
virtual	~QwtSplineInterpolating ()
	Destructor .
virtual QPolygonF	polygon (const QPolygonF &, double tolerance) const override
	Interpolate a curve by a polygon.
Public Member Functions inherited from QwtSpline
	QwtSpline ()
	Constructor.
virtual	~QwtSpline ()
	Destructor.
void	setParametrization (int type)
	Set parametrization by type.
void	setParametrization (QwtSplineParametrization *)
	Set parametrization object.
const QwtSplineParametrization *	parametrization () const
	Get parametrization.
void	setBoundaryType (BoundaryType)
	Set boundary type.
BoundaryType	boundaryType () const
	Get boundary type.
void	setBoundaryValue (BoundaryPosition, double value)
	Set boundary value.
double	boundaryValue (BoundaryPosition) const
	Get boundary value.
void	setBoundaryCondition (BoundaryPosition, int condition)
	Set boundary condition.
int	boundaryCondition (BoundaryPosition) const
	Get boundary condition.
void	setBoundaryConditions (int condition, double valueBegin=0.0, double valueEnd=0.0)
	Set boundary conditions for both ends.

Additional Inherited Members
Public Types inherited from QwtSplineC2
enum	BoundaryConditionC2 { CubicRunout = LinearRunout + 1 , NotAKnot }
	Boundary condition that requires C2 continuity. More...
Public Types inherited from QwtSpline
enum	BoundaryType { ConditionalBoundaries , PeriodicPolygon , ClosedPolygon }
	Boundary type specifying the spline at its endpoints. More...
enum	BoundaryPosition { AtBeginning , AtEnd }
	position of a boundary condition More...
enum	BoundaryCondition { Clamped1 , Clamped2 , Clamped3 , LinearRunout }
	Boundary condition. More...

Detailed Description

A cubic spline.

Constructor & Destructor Documentation

QwtSplineCubic()

QwtSplineCubic::QwtSplineCubic

(

)

Constructor.

~QwtSplineCubic()

QwtSplineCubic::~QwtSplineCubic ( )

virtual

Destructor.

Destructor

.

Member Function Documentation

bezierControlLines()

QVector< QLineF > QwtSplineCubic::bezierControlLines ( const QPolygonF &  points ) const

overridevirtual

Get Bezier control lines.

Interpolate a curve with Bezier curves.

Reimplemented from QwtSplineC2.

curvatures()

QVector< double > QwtSplineCubic::curvatures ( const QPolygonF &  points ) const

overridevirtual

Get curvatures at control points.

Find the second derivative at the control points.

Implements QwtSplineC2.

locality()

uint QwtSplineCubic::locality ( ) const

overridevirtual

Get locality (always 0 - non-local)

Get locality.

Reimplemented from QwtSpline.

painterPath()

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

overridevirtual

Get painter path from polygon.

Interpolate a curve with Bezier curves.

Reimplemented from QwtSplineC2.

polynomials()

QVector< QwtSplinePolynomial > QwtSplineCubic::polynomials ( const QPolygonF &  points ) const

overridevirtual

Get polynomials from polygon.

Calculate the interpolating polynomials for a non-parametric spline.

Reimplemented from QwtSplineC2.

slopes()

QVector< double > QwtSplineCubic::slopes ( const QPolygonF &  points ) const

overridevirtual

Get slopes at control points.

Find the first derivative at the control points.

Reimplemented from QwtSplineC2.

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

• /home/runner/work/QWT/QWT/src/plot/qwt_spline_cubic.h
• /home/runner/work/QWT/QWT/src/plot/qwt_spline_cubic.cpp