Animating on a layer

Hi all -

I just started using OpenMap and I'm trying a simple test of animating a
graphic on a map. I'm using a URLRasterLocation graphic since I'll be, at
some point, specifying a little plane graphic for what is being displayed.
For some reason, the call to repaint is not changing the location. I see the
location for the urlrloc object is changing on each call to paint though.
So, I'm confused.

I included the code for my very simple layer. The graphic shows up correctly
on first render but the Timer run interpolation fails miserably. Any
thoughts?

Thanks,
Chris

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import com.bbn.openmap.Layer;
import com.bbn.openmap.event.*;
import com.bbn.openmap.proj.*;
import com.bbn.openmap.layer.location.URLRasterLocation;

import java.awt.event.*;

public class UCAVLayer extends Layer
{
  javax.swing.Timer timer = null;
  URLRasterLocation urlrloc = null;
  int num_interpolations = 0;
  final static int ONE_SECOND = 1000;
  Projection cur_proj = null;

  public UCAVLayer()
  {
    urlrloc = new URLRasterLocation(-6.0f, 141.0f, "UCAV1", "uav.gif");
    System.out.println("Creating new timer...");
    timer = new javax.swing.Timer(ONE_SECOND, new ActionListener() {
       public void actionPerformed(ActionEvent evt) {
               interpolate();
       }
    });
    timer.start();
  }

  float[] latlons = { -6.0f, 141.0f,
                      -6.996f, 144.006f,
                      -5.522f, 143.457f,
                      -4.017f, 141.988f,
                      -5.016f, 139.998f,
                      -6.0f, 141.0f
                      };

  protected void interpolate() {
  System.out.println("Here we are interpolating...");
    if(num_interpolations >= latlons.length)
      num_interpolations = 0;
    float newlat = latlons[num_interpolations];
    float newlon = latlons[num_interpolations + 1];
    num_interpolations += 2;

    urlrloc.setLocation(newlat, newlon);
    repaint();
  }

  public void projectionChanged(ProjectionEvent e)
  {
    cur_proj = e.getProjection();
    urlrloc.generate(cur_proj);
  }

  public void paint(java.awt.Graphics g)
  {
  System.out.println("\npainting...");
  System.out.println("Location is " + urlrloc.lat + "," + urlrloc.lon);
    if(cur_proj != null)
    {
      System.out.println("generating graphic...");
      urlrloc.generate(cur_proj);
    }
    urlrloc.render(g);
  }
}

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