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