qwt_bezier.h

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/******************************************************************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/
 
#ifndef QWT_BEZIER_H
#define QWT_BEZIER_H
 
#include "qwt_global.h"
 
class QPointF;
class QPolygonF;
 
class QWT_EXPORT QwtBezier
{
  public:
    QwtBezier( double tolerance = 0.5 );
    ~QwtBezier();
 
    void setTolerance( double tolerance );
    double tolerance() const;
 
    QPolygonF toPolygon( const QPointF& p1, const QPointF& cp1,
        const QPointF& cp2, const QPointF& p2 ) const;
 
    void appendToPolygon( const QPointF& p1, const QPointF& cp1,
        const QPointF& cp2, const QPointF& p2, QPolygonF& polygon ) const;
 
    static QPointF pointAt( const QPointF& p1, const QPointF& cp1,
        const QPointF& cp2, const QPointF& p2, double t );
 
  private:
    double m_tolerance;
    double m_flatness;
};
 
inline double QwtBezier::tolerance() const
{
    return m_tolerance;
}
 
#endif