提供 C2（二阶参数）连续性的样条插值基类更多...

#include <qwt_spline.h>

类 QwtSplineC2 继承关系图:

Public 类型
enum	BoundaryConditionC2 { CubicRunout = LinearRunout + 1 , NotAKnot }
	Boundary condition that requires C2 continuity 更多...

Public 类型继承自 QwtSpline
enum	BoundaryType { ConditionalBoundaries , PeriodicPolygon , ClosedPolygon }
	指定样条端点处的边界类型更多...

enum	BoundaryPosition { AtBeginning , AtEnd }
	边界条件的位置更多...

enum	BoundaryCondition { Clamped1 , Clamped2 , Clamped3 , LinearRunout }
	边界条件更多...

Public 成员函数
	QwtSplineC2 ()
	构造函数

virtual	~QwtSplineC2 ()
	析构函数

virtual QPainterPath	painterPath (const QPolygonF &) const override
	使用贝塞尔曲线插值曲线

virtual QVector< QLineF >	bezierControlLines (const QPolygonF &) const override
	使用贝塞尔曲线插值曲线

virtual QPolygonF	equidistantPolygon (const QPolygonF &, double distance, bool withNodes) const override
	查找具有"等距"点的插值多边形

virtual QVector< QwtSplinePolynomial >	polynomials (const QPolygonF &) const override
	计算非参数样条的插值多项式

virtual QVector< double >	slopes (const QPolygonF &) const override
	在控制点处找到一阶导数

virtual QVector< double >	curvatures (const QPolygonF &) const =0
	Find the second derivative at the control points

Public 成员函数继承自 QwtSplineC1
	QwtSplineC1 ()
	构造函数

virtual	~QwtSplineC1 ()
	析构函数

virtual double	slopeAtBeginning (const QPolygonF &, double slopeNext) const
	计算样条起始处的斜率

virtual double	slopeAtEnd (const QPolygonF &, double slopeBefore) const
	计算样条结束处的斜率

Public 成员函数继承自 QwtSplineG1
	QwtSplineG1 ()
	构造函数

virtual	~QwtSplineG1 ()
	析构函数

Public 成员函数继承自 QwtSplineInterpolating
	QwtSplineInterpolating ()
	构造函数

virtual	~QwtSplineInterpolating ()
	析构函数

virtual QPolygonF	polygon (const QPolygonF &, double tolerance) const override
	用多边形插值曲线

Public 成员函数继承自 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

virtual uint	locality () const
	Get locality (number of points used for calculation)