/** @file
* Copyright (C) 2004–5 John D Lamb (J.D.Lamb@btinternet.com)
* Copyright (C) 2007, 2008 John D Lamb (J.D.Lamb@btinternet.com)
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package jscicalc.pobject;
import jscicalc.AngleType;
import jscicalc.OObject;
import jscicalc.complex.Complex;
/**
* Cosine operation.
*
* @author J. D. Lamb
* @version $Revision: 1.6 $
*/
public class Cos extends Trig {
/**
* Constructor. Sets a tooltip and shortcut.
*/
public Cos( AngleType angleType ){
super( angleType );
ftooltip = "cosine function";
fshortcut = 'c';
}
/**
* Cosine of x.
* @param x The value (right of symbol)
* @return The result of the operation
*/
public double function( double x ){
return Math.cos( x * scale );
}
/**
* Cosine of x.
* @param x The value (right of symbol)
* @return The result of the operation
*/
public OObject function( OObject x ){
if( x instanceof Complex ){
Complex c = (Complex)x;
if( scale != 1 && StrictMath.abs( c.imaginary() ) > 1e-6 )
throw new RuntimeException( "Error" );
return c.scale( scale ).cos();
} else {
return x.cos( angleType );
}
}
public String[] name_array(){
return fname;
}
public static void main( String args[] ){
PObject o = new Cos( AngleType.DEGREES );
StringBuilder s = new StringBuilder( "<html>" );
s.append( o.name() );
s.append( "</html>" );
javax.swing.JOptionPane.showMessageDialog( null, s.toString() );
}
private final static String[] fname = { "c", "o", "s", " " };
}