capacitance.h

/***************************************************************************
 *   Copyright (C) 2003-2004 by David Saxton                               *
 *   david@bluehaze.org                                                    *
 *                                                                         *
 *   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.                                   *
 ***************************************************************************/

#ifndef CAPACITANCE_H
#define CAPACITANCE_H

#include "reactive.h"

class Capacitance : public Reactive
{
public:
        enum Method
        {
                m_none, // None
                m_euler, // Backward Euler
                m_trap // Trapezoidal (currently unimplemented)
        };
        Capacitance( const double capacitance, const double delta );
        virtual ~Capacitance();
        
        virtual Type type() const { return Element_Capacitance; }
        void setMethod( Method m );
        virtual void time_step();
        virtual void add_initial_dc();
        void setCapacitance( const double c );
        virtual void add_map();
        
protected:
        virtual void updateCurrents();
        virtual bool updateStatus();
        
private:
        double m_cap; // Capacitance
        Method m_method; // Method of integration
        
        double g_eq_old;
        double i_eq_old;
};

#endif

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