//  $Id: AtomRadiusByConstant.java,v 1.1 2006/05/20 17:02:02 Sasha Buzko Exp $
//
//  Copyright (c) 2000-2003  San Diego Supercomputer Center (SDSC),
//  a facility operated by the University of California,
//  San Diego (UCSD), San Diego, California, USA.
//
//  Users and possessors of this source code are hereby granted a
//  nonexclusive, royalty-free copyright and design patent license to
//  use this code in individual software.  License is not granted for
//  commercial resale, in whole or in part, without prior written
//  permission from SDSC.  This source is provided "AS IS" without express
//  or implied warranty of any kind.
//
//  For further information, please see:  http://mbt.sdsc.edu
//
//  History:
//  $Log: AtomRadiusByConstant.java,v $
//  Revision 1.1  2006/05/20 17:02:02  Sasha Buzko
//  Updated version
//
//  Revision 1.1  2006/04/30 20:13:58  Sasha Buzko
//  New version of the app
//
//  Revision 1.1  2006/04/15 19:42:22  Sasha Buzko
//  Initial commit
//
//  Revision 1.2  2005/11/13 23:44:33  Administrator
//  *** empty log message ***
//
//  Revision 1.1  2005/11/13 04:35:16  Administrator
//  *** empty log message ***
//
//  Revision 1.1  2003/12/16 21:42:42  moreland
//  Added new style implementation classes.
//
//  Revision 1.0  2003/12/15 18:33:19  moreland
//  First implementation.
//


package edu.sdsc.mbt.viewables;


import edu.sdsc.mbt.viewables.AtomRadius;
import edu.sdsc.mbt.Atom;


/**
 *  This class implements the AtomRadius interface by applying a radius
 *  to the given an Atom by using the radius of the bond.
 *  <P>
 *  @see edu.sdsc.mbt.viewables.AtomRadius
 *  @see edu.sdsc.mbt.Atom
 *  @see edu.sdsc.mbt.util.PeriodicTable
 *  @see edu.sdsc.mbt.util.Element
 *  @see edu.sdsc.mbt.viewables.ElementStyles
 *  <P>
 *  @author John L. Moreland
 */
public class AtomRadiusByConstant
	implements AtomRadius
{
	public static final String NAME = "By Constant (Smooth Bonds)";

	// The constant radius to use.
	private double radius = StylesPreferences.ballRadius;

	// Holds a singleton instance of this class.
	private static AtomRadiusByConstant singleton = null;

	/**
	 *  The constructor is PRIVATE so that the "create" method
	 *  is used to produce a singleton instance of this class.
	 */
	private AtomRadiusByConstant( )
	{
	}

	/**
	 *  Return the singleton instance of this class.
	 */
	public static AtomRadiusByConstant create( )
	{
		if ( singleton == null )
			singleton = new AtomRadiusByConstant( );
		return singleton;
	}

	/**
	 *  Produce a radius based upon the atom element type.
	 */
	public double getAtomRadius( Atom atom )
	{
		return radius;
	}

	/**
	 *  Set the constant radius.
	 */
	public void setRadius( double radius )
	{
		this.radius = radius;
	}

	/**
	 *  Get the constant radius.
	 */
	public double getRadius( )
	{
		return radius;
	}
}