voltagesource.cpp

/***************************************************************************
 *   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 "voltagesource.h"
#include "elementset.h"

VoltageSource::VoltageSource( const double voltage )
        : Element::Element()
{
        m_v = voltage;
        m_numCBranches = 1;
        m_numCNodes = 2;
}

VoltageSource::~VoltageSource()
{
}

void VoltageSource::setVoltage( const double v )
{
        if ( m_v == v ) return;
        
        if (p_eSet)
                p_eSet->setCacheInvalidated();
        
        m_v = v;
        add_initial_dc();
}


void VoltageSource::add_map()
{
        if (!b_status) return;
        
        if ( !p_cnode[0]->isGround )
        {
                p_A->setUse_b( p_cnode[0]->n(), p_cbranch[0]->n(), Map::et_constant, true );
                p_A->setUse_c( p_cbranch[0]->n(), p_cnode[0]->n(), Map::et_constant, true );
        }
        
        if ( !p_cnode[1]->isGround )
        {
                p_A->setUse_b( p_cnode[1]->n(), p_cbranch[0]->n(), Map::et_constant, true );
                p_A->setUse_c( p_cbranch[0]->n(), p_cnode[1]->n(), Map::et_constant, true );
        }
}


void VoltageSource::add_initial_dc()
{
        if (!b_status)
                return;
        
        A_b( 0, 0 ) = -1;
        A_c( 0, 0 ) = -1;
        A_b( 1, 0 ) = 1;
        A_c( 0, 1 ) = 1;
        
        b_v( 0 ) = m_v;
}

void VoltageSource::updateCurrents()
{
        if (!b_status) return;
        m_cnodeI[0] = p_cbranch[0]->i;
        m_cnodeI[1] = -m_cnodeI[0];
}

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