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/**
This file is part of Kig, a KDE program for Interactive Geometry...
Copyright (C) 2004 Dominique Devriese <devriese@kde.org>
Copyright (C) 2004 Pino Toscano <toscano.pino@tiscali.it>
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.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
USA
**/
#include "goniometry.h"
#include <qstringlist.h>
#include <kdebug.h>
#include <klocale.h>
#include <cmath>
Goniometry::Goniometry()
{
mvalue = 0.0;
msys = Rad;
}
Goniometry::Goniometry( double value, Goniometry::System system )
{
mvalue = value;
msys = system;
}
Goniometry::~Goniometry()
{
}
void Goniometry::setValue( double value )
{
mvalue = value;
}
const double Goniometry::value() const
{
return mvalue;
}
void Goniometry::setSystem( Goniometry::System system )
{
msys = system;
}
void Goniometry::convertTo( Goniometry::System system )
{
mvalue = convert( mvalue, msys, system );
msys = system;
}
const Goniometry::System Goniometry::system() const
{
return msys;
}
double Goniometry::getValue( Goniometry::System system )
{
return convert( mvalue, msys, system );
}
Goniometry& Goniometry::operator=( const Goniometry& g )
{
mvalue = g.value();
msys = g.system();
return *this;
}
double Goniometry::convert( const double angle, const Goniometry::System from, const Goniometry::System to )
{
switch( from )
{
case Deg:
{
if ( to == Rad )
return angle * M_PI / 180;
if ( to == Grad )
return angle * 10 / 9;
break;
}
case Rad:
{
if ( to == Deg )
return angle * 180 / M_PI;
if ( to == Grad )
return angle * 200 / M_PI;
break;
}
case Grad:
{
if ( to == Deg )
return angle * 9 / 10;
if ( to == Rad )
return angle * M_PI / 200;
break;
}
}
return angle;
}
QStringList Goniometry::systemList()
{
QStringList sl;
sl << i18n( "Translators: Degrees", "Deg" );
sl << i18n( "Translators: Radians", "Rad" );
sl << i18n( "Translators: Gradians", "Grad" );
return sl;
}
Goniometry::System Goniometry::intToSystem( const int index )
{
if( index == 0 )
return Deg;
else if( index == 1 )
return Rad;
else if( index == 2 )
return Grad;
kdDebug() << "No goniometric system with index " << index << endl;
return Rad;
}
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