Qwt User's Guide  6.2.0
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  {
43 
49 
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
Base class for spline interpolations providing a first order parametric continuity ( C1 ) between adj...
Definition: qwt_spline.h:236
virtual uint locality() const
Definition: qwt_spline.cpp:564
A spline with C1 continuity.
Type
Spline interpolation type.
A cubic polynomial without constant term.