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  // Nenya library - tools for developing networked games
  // Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
  // This library is free software; you can redistribute it and/or modify it
  // under the terms of the GNU Lesser General Public License as published
  // by the Free Software Foundation; either version 2.1 of the License, or
  // (at your option) any later version.
 // This library is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // Lesser General Public License for more details.
 // You should have received a copy of the GNU Lesser General Public
 // License along with this library; if not, write to the Free Software
 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
An animation that bobbles an image around within a specific horizontal and vertical pixel range for a given period of time.
 public class BobbleAnimation extends Animation
Constructs a bobble animation.

image the image to animate.
sx the starting x-position.
sy the starting y-position.
rx the horizontal bobble range.
ry the vertical bobble range.
duration the time to animate in milliseconds.
     public BobbleAnimation (Mirage imageint sxint syint rxint ryint duration)
         super(new Rectangle(sx - rxsy - ryimage.getWidth() + rximage.getHeight() + ry));
         // save things off
          = image;
          = sx;
          = sy;
          = rx;
          = ry;
         // calculate animation ending time
          = duration;
     public void tick (long tickStamp)
         // grab our ending time on our first tick
         if ( == 0L) {
              = tickStamp + ;
          = (tickStamp >= );
         // calculate the latest position
         int dx = RandomUtil.getInt();
         int dy = RandomUtil.getInt();
          =  + dx * (RandomUtil.getBoolean() ? -1 : 1);
          =  + dy * (RandomUtil.getBoolean() ? -1 : 1);
     public void fastForward (long timeDelta)
          += timeDelta;
     public void paint (Graphics2D gfx)
     protected void toString (StringBuilder buf)
         buf.append(", x=").append();
         buf.append(", y=").append();
         buf.append(", rx=").append();
         buf.append(", ry=").append();
         buf.append(", sx=").append();
        buf.append(", sy=").append();

The current position of the image.
    protected int _x_y;

The horizontal and vertical bobbling range.
    protected int _rx_ry;

The starting position.
    protected int _sx_sy;

The image to animate.
    protected Mirage _image;

Animation ending timing information.
    protected long _duration_end;
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