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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 "elementsignal.h"
#include <cmath>
ElementSignal::ElementSignal()
{
m_type = ElementSignal::st_sinusoidal;
m_time = 0.;
m_frequency = 0.;
}
ElementSignal::~ElementSignal()
{
}
void ElementSignal::setStep( double delta, Type type, double frequency )
{
m_type = type;
m_delta = delta;
m_frequency = frequency;
m_omega = 6.283185307179586*m_frequency;
m_time = 1./(4.*m_frequency);
}
double ElementSignal::advance()
{
m_time += m_delta;
if ( m_time >= 1./m_frequency ) m_time -= 1./m_frequency;
switch (m_type)
{
case ElementSignal::st_sawtooth:
{
// TODO Sawtooth signal
return 0.;
}
case ElementSignal::st_square:
{
return (sin(m_time*m_omega)>=0)?1:-1;
}
case ElementSignal::st_triangular:
{
// TODO Triangular signal
return 0.;
}
case ElementSignal::st_sinusoidal:
default:
{
return sin(m_time*m_omega);
}
}
}
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