QwtSplineCubic类 参考

三次样条 更多...

#include <qwt_spline_cubic.h>

类 QwtSplineCubic 继承关系图:

类
class	PrivateData

Public 成员函数
	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 成员函数 继承自 QwtSplineC2
	QwtSplineC2 ()
	构造函数
virtual	~QwtSplineC2 ()
	析构函数
virtual QPolygonF	equidistantPolygon (const QPolygonF &, double distance, bool withNodes) const override
	查找具有"等距"点的插值多边形
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

额外继承的成员函数
Public 类型 继承自 QwtSplineC2
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...

详细描述

三次样条

构造及析构函数说明

QwtSplineCubic()

QwtSplineCubic::QwtSplineCubic

(

)

Constructor

构造函数

~QwtSplineCubic()

QwtSplineCubic::~QwtSplineCubic ( )

virtual

Destructor

析构函数

成员函数说明

bezierControlLines()

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

overridevirtual

Get Bezier control lines

使用贝塞尔曲线插值曲线

重载 QwtSplineC2 .

curvatures()

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

overridevirtual

Get curvatures at control points

在控制点处找到二阶导数

实现了 QwtSplineC2.

locality()

uint QwtSplineCubic::locality ( ) const

overridevirtual

Get locality (always 0 - non-local)

获取局部性

重载 QwtSpline .

painterPath()

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

overridevirtual

Get painter path from polygon

使用贝塞尔曲线插值曲线

重载 QwtSplineC2 .

polynomials()

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

overridevirtual

Get polynomials from polygon

计算非参数样条的插值多项式

重载 QwtSplineC2 .

slopes()

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

overridevirtual

Get slopes at control points

在控制点处找到一阶导数

重载 QwtSplineC2 .

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