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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. *
***************************************************************************/
#include "elementset.h"
#include "matrix.h"
#include "vcvs.h"
VCVS::VCVS( const double gain )
: Element::Element()
{
m_g = gain;
m_numCBranches = 1;
m_numCNodes = 4;
}
VCVS::~VCVS()
{
}
void VCVS::setGain( const double g )
{
if ( g == m_g )
return;
if (p_eSet)
p_eSet->setCacheInvalidated();
m_g = -m_g;
add_initial_dc();
m_g = g;
add_initial_dc();
}
void VCVS::add_map()
{
if (!b_status)
return;
if ( !p_cnode[0]->isGround )
{
p_A->setUse_c( p_cbranch[0]->n(), p_cnode[0]->n(), Map::et_stable, false );
}
if ( !p_cnode[1]->isGround )
{
p_A->setUse_c( p_cbranch[0]->n(), p_cnode[1]->n(), Map::et_stable, false );
}
if ( !p_cnode[2]->isGround )
{
p_A->setUse_b( p_cnode[2]->n(), p_cbranch[0]->n(), Map::et_constant, true );
p_A->setUse_c( p_cbranch[0]->n(), p_cnode[2]->n(), Map::et_constant, true );
}
if ( !p_cnode[3]->isGround )
{
p_A->setUse_b( p_cnode[3]->n(), p_cbranch[0]->n(), Map::et_constant, true );
p_A->setUse_c( p_cbranch[0]->n(), p_cnode[3]->n(), Map::et_constant, true );
}
}
void VCVS::add_initial_dc()
{
if (!b_status)
return;
A_c( 0, 0 ) -= m_g;
A_c( 0, 1 ) += m_g;
A_b( 2, 0 ) = 1;
A_c( 0, 2 ) = 1;
A_b( 3, 0 ) = -1;
A_c( 0, 3 ) = -1;
}
void VCVS::updateCurrents()
{
if (!b_status) return;
m_cnodeI[0] = m_cnodeI[1] = 0.;
m_cnodeI[3] = p_cbranch[0]->i;
m_cnodeI[2] = -m_cnodeI[3];
}
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