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/*
Copyright (C) 2002 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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
*/
#if !defined (octave_base_dae_h)
#define octave_base_dae_h 1
#include "base-de.h"
class
base_diff_alg_eqn : public base_diff_eqn
{
public:
base_diff_alg_eqn (void)
: base_diff_eqn (), xdot () { }
base_diff_alg_eqn (const ColumnVector& xx, double tt)
: base_diff_eqn (xx, tt), xdot (xx.length (), 0.0) { }
base_diff_alg_eqn (const ColumnVector& xx, const ColumnVector& xxdot,
double tt)
: base_diff_eqn (xx, tt), xdot (xxdot) { }
base_diff_alg_eqn (const base_diff_alg_eqn& a)
: base_diff_eqn (a), xdot (a.xdot) { }
virtual ~base_diff_alg_eqn (void) { }
base_diff_alg_eqn& operator = (const base_diff_alg_eqn& a)
{
if (this != &a)
{
base_diff_eqn::operator = (a);
xdot = a.xdot;
}
return *this;
}
void initialize (const ColumnVector& x0, double t0)
{
base_diff_eqn::initialize (x0, t0);
xdot = ColumnVector (x0.length (), 0.0);
}
void initialize (const ColumnVector& x0, const ColumnVector& xdot0,
double t0)
{
base_diff_eqn::initialize (x0, t0);
xdot = xdot0;
}
ColumnVector state_derivative (void) { return xdot; }
protected:
ColumnVector xdot;
};
#endif
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/
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