/*

Copyright (C) 1996, 1997 John W. Eaton

This file is part of Octave.

Octave 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, or (at your option) any
later version.

Octave is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING.  If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#if !defined (octave_FEGrid_h)
#define octave_FEGrid_h 1

#if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION)
#pragma interface
#endif

#include <iostream>

#include "dColVector.h"

class
FEGrid
{
public:

  FEGrid (void)
    : elem () { }

  FEGrid (const ColumnVector& elbnds)
    : elem (elbnds) { check_grid (); }

  FEGrid (int nel, double width);

  FEGrid (int nel, double left, double right);

  FEGrid (const FEGrid& a)
    : elem (a.elem) { }

  FEGrid& operator = (const FEGrid& a)
    {
      if (this != &a)
	elem = a.elem;

      return *this;
    }

  ~FEGrid (void) { }

  int element (double x) const;

  double left (void) const { return elem.elem (0); }

  double right (void) const { return elem.elem (elem.capacity () - 1); }

  int in_bounds (double x) const { return (x >= left () && x <= right ()); }

  ColumnVector element_boundaries (void) const { return elem; }

  friend std::ostream& operator << (std::ostream&, const FEGrid&);

protected:

  ColumnVector elem;

private:

  void error (const char* msg) const;
  void nel_error (void) const;

  void check_grid (void) const;
};

#endif

/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/
