Qwt User's Guide: qwt_spline_local.h Source File

Qwt User's Guide 6.3.0

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qwt_spline_local.h
1/******************************************************************************
2 * Qwt Widget Library
3 * Copyright (C) 1997 Josef Wilgen
4 * Copyright (C) 2002 Uwe Rathmann
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the Qwt License, Version 1.0
8 *****************************************************************************/
9
10#ifndef QWT_SPLINE_LOCAL_H
11#define QWT_SPLINE_LOCAL_H
12
13#include "qwt_global.h"
14#include "qwt_spline.h"
15
24 class QWT_EXPORT QwtSplineLocal : public QwtSplineC1
25{
26 public:
34 enum Type
35 {
42 Cardinal,
43
48 ParabolicBlending,
49
53 Akima,
54
62 PChip
63 };
64
65 QwtSplineLocal( Type type );
66 virtual ~QwtSplineLocal();
67
68 Type type() const;
69
70 virtual uint locality() const QWT_OVERRIDE;
71
72 virtual QPainterPath painterPath( const QPolygonF& ) const QWT_OVERRIDE;
73 virtual QVector< QLineF > bezierControlLines( const QPolygonF& ) const QWT_OVERRIDE;
74
75 // calculating the parametric equations
76 virtual QVector< QwtSplinePolynomial > polynomials( const QPolygonF& ) const QWT_OVERRIDE;
77 virtual QVector< double > slopes( const QPolygonF& ) const QWT_OVERRIDE;
78
79 private:
80 const Type m_type;
81};
82
83#endif
QVector
Definition qwt_clipper.h:23
QwtSplineC1
Base class for spline interpolations providing a first order parametric continuity ( C1 ) between adj...
Definition qwt_spline.h:236
QwtSpline::locality
virtual uint locality() const
Definition qwt_spline.cpp:564
QwtSplineLocal
A spline with C1 continuity.
Definition qwt_spline_local.h:25
QwtSplineLocal::Type
Type
Spline interpolation type.
Definition qwt_spline_local.h:35
QwtSplineLocal::Akima
@ Akima
Definition qwt_spline_local.h:53
QwtSplineLocal::ParabolicBlending
@ ParabolicBlending
Definition qwt_spline_local.h:48
QwtSplineLocal::Cardinal
@ Cardinal
Definition qwt_spline_local.h:42
QwtSplinePolynomial
A cubic polynomial without constant term.
Definition qwt_spline_polynomial.h:31