code: /*******************************************************************************
   * Copyright (c) 2013 Attila Kovacs <attila[AT]sigmyne.com>.
   * All rights reserved. 
   * 
   * This file is part of crush.
   * 
   *     crush 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 3 of the License, or
   *     (at your option) any later version.
   * 
   *     crush 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 crush.  If not, see <http://www.gnu.org/licenses/>.
   * 
   * Contributors:
   *     Attila Kovacs <attila[AT]sigmyne.com> - initial API and implementation
   ******************************************************************************/
  package crush.motion;
  
  import java.io.Serializable;
  
  import jnum.text.TableFormatter;
  import jnum.Copiable;
  import jnum.Unit;
  import jnum.Util;
  import jnum.math.*;
  
  
  public class Chopper implements Serializable, Cloneable, Copiable<Chopper>, TableFormatter.Entries {
  	/**
  	 * 
  	 */
  	private static final long serialVersionUID = 2142368367368186753L;
  	public int positions = 0; // 0 for indeterminate, -1 for sweeping mode
  	public double frequency = Double.NaN;
  	public double amplitude = 0.0;
  	public double efficiency = Double.NaN;
  	public double angle = Double.NaN;
  	public Vector2D offset = new Vector2D();
  	public ChopperPhases phases;
  	
  	@Override
  	public Chopper clone() {
  		try { return (Chopper) super.clone(); }
  		catch(CloneNotSupportedException e) { return null; }
  	}
  	
  	@Override
  	public Chopper copy() {
  		Chopper copy = clone();
  		copy.phases = null;
  		copy.offset = offset.copy();
  		return copy;
  	}
  	
  	public double stareDuration() {
  		return efficiency / (positions * frequency);		
  	}
  	
  	@Override
      public Object getTableEntry(String name) {
  	    if(name.equals("chopfreq")) return frequency / Unit.Hz;
          if(name.equals("chopthrow")) return amplitude / Unit.arcsec;
          if(name.equals("chopeff")) return efficiency;
          return null;
  	}
  	
  	@Override
  	public String toString() {
  		return "+/-" + Util.f1.format(amplitude / Unit.arcsec) + "\" at " 
  		+ Util.f1.format(angle / Unit.deg) + " deg, "
  		+ Util.f3.format(frequency / Unit.Hz) + " Hz, " 
  		+ Util.f1.format(100.0 * efficiency) + "%";
  	}
  }
  