ellipse.h

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#ifndef ELLIPSE_CLASS
#define ELLIPSE_CLASS
 
/*****************************************************************************\
*                                                                             *
*  Name   : ellipse                                                           *
*  Author : Chris Koeritz                                                     *
*                                                                             *
*******************************************************************************
* Copyright (c) 1992-$now By Author.  This program is free software; you can  *
* redistribute it and/or modify it under the terms of the GNU General Public  *
* License as published by the Free Software Foundation; either version 2 of   *
* the License or (at your option) any later version.  This is online at:      *
*     http://www.fsf.org/copyleft/gpl.html                                    *
* Please send any updates to: fred@gruntose.com                               *
\*****************************************************************************/
 
namespace geometric {
 
// forward.
class cartesian_point;
class double_angle;
 
 
class ellipse
{
public:
  ellipse();
  ellipse(const cartesian_point &center, double width_from_center,
          double height_from_center);
  ellipse(const ellipse &to_copy);
 
  ~ellipse();
 
  ellipse &operator = (const ellipse &to_copy);
 
  double area() const;
 
  double perimeter() const;
 
  bool inside(const cartesian_point &where) const;
 
  cartesian_point location(const double_angle &where) const;
 
  cartesian_point center() const;
  double width_from_center() const;
  double height_from_center() const;
 
  void center(const cartesian_point &to_set);
  void width_from_center(double to_set);
  void height_from_center(double to_set);
 
protected:
  cartesian_point _center;
  double _width_from_center;
  double _height_from_center;
};
 
} // namespace.
 
#endif