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/***************************************************************************
* 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"
/**
@author David Saxton
@short Capacitance
*/
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; }
/**
* Set the stepping use for numerical integration of capacitance,
* and the interval between successive updates
*/
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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