QwtSplineC1类 参考

提供 C1（一阶参数）连续性的样条插值基类 更多...

#include <qwt_spline.h>

类 QwtSplineC1 继承关系图:

Public 成员函数
	QwtSplineC1 ()
	构造函数
virtual	~QwtSplineC1 ()
	析构函数
virtual QPainterPath	painterPath (const QPolygonF &) const override
	计算插值的绘制路径
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
	计算非参数样条的插值多项式
virtual QVector< double >	slopes (const QPolygonF &) const =0
	Find the first derivative at the control points
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)

额外继承的成员函数
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...

详细描述

提供 C1（一阶参数）连续性的样条插值基类

构造及析构函数说明

QwtSplineC1()

QwtSplineC1::QwtSplineC1

(

)

构造函数

~QwtSplineC1()

QwtSplineC1::~QwtSplineC1 ( )

virtual

析构函数

成员函数说明

bezierControlLines()

QVector< QLineF > QwtSplineC1::bezierControlLines ( const QPolygonF &  points ) const

overridevirtual

使用贝塞尔曲线插值曲线

实现了 QwtSplineInterpolating.

被 QwtSplineC2, QwtSplineLocal , 以及 QwtSplineCubic 重载.

equidistantPolygon()

QPolygonF QwtSplineC1::equidistantPolygon ( const QPolygonF &  points, double  distance, bool  withNodes  ) const

overridevirtual

查找具有"等距"点的插值多边形

重载 QwtSplineInterpolating .

被 QwtSplineC2 重载.

painterPath()

QPainterPath QwtSplineC1::painterPath ( const QPolygonF &  points ) const

overridevirtual

计算插值的绘制路径

重载 QwtSplineInterpolating .

被 QwtSplineC2, QwtSplineCubic , 以及 QwtSplineLocal 重载.

polynomials()

QVector< QwtSplinePolynomial > QwtSplineC1::polynomials ( const QPolygonF &  points ) const

virtual

计算非参数样条的插值多项式

被 QwtSplineC2, QwtSplineCubic , 以及 QwtSplineLocal 重载.

slopeAtBeginning()

double QwtSplineC1::slopeAtBeginning ( const QPolygonF &  points, double  slopeNext  ) const

virtual

计算样条起始处的斜率

slopeAtEnd()

double QwtSplineC1::slopeAtEnd ( const QPolygonF &  points, double  slopeBefore  ) const

virtual

计算样条结束处的斜率

slopes()

QVector< double > QwtSplineC1::slopes ( const QPolygonF &  points ) const

pure virtual

Find the first derivative at the control points

参数

points

Control nodes of the spline

返回

Vector with the values of the 2nd derivate at the control points

注解

The x coordinates need to be increasing or decreasing

在 QwtSplineC2, QwtSplineCubic , 以及 QwtSplineLocal 内被实现.

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该类的文档由以下文件生成:

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