/***************************************************************************
 *   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.                                   *
 ***************************************************************************/

#include "currentsource.h"
#include "elementset.h"
#include "matrix.h"

CurrentSource::CurrentSource( const double current )
	: Element::Element()
{
	m_i = current;
	m_numCNodes = 2;
}


CurrentSource::~CurrentSource()
{
}


void CurrentSource::setCurrent( const double i )
{
	if ( i == m_i ) return;

	if (p_eSet)
		p_eSet->setCacheInvalidated();
	
	// Remove the old current
	m_i = -m_i;
	add_initial_dc();
	
	m_i = i;
	add_initial_dc();
}


void CurrentSource::add_map()
{
	// We don't need a map for current source :-)
}


void CurrentSource::add_initial_dc()
{
	if (!b_status)
		return;
	
	b_i( 0 ) -= m_i;
	b_i( 1 ) += m_i;
}


void CurrentSource::updateCurrents()
{
	m_cnodeI[0] = -m_i;
	m_cnodeI[1] = m_i;
}