import java.util.Iterator;
  import org.rsg.carnivore.*;
  import org.rsg.carnivore.net.*;
  
  HashMap nodes = new HashMap();
  float startDiameter = 100.0;
  float shrinkSpeed = 0.97;
  int splitter, x, y;
  PFont font;
  
  void setup() 
  {
    size(800, 600);
    background(255);
    frameRate(10);
    Log.setDebug(true); // Uncomment this for verbose mode
    CarnivoreP5 c = new CarnivoreP5(this);
    //c.setVolumeLimit(4);
    // Use the "Create Font" tool to add a 12 point font to your sketch,
    // then use its name as the parameter to loadFont().
    font = loadFont("CourierNew-12.vlw");
    textFont(font);
  }
  
  void draw() 
  {
    background(255);
    drawNodes();
  }
  
  // Iterate through each node
  synchronized void drawNodes() {
    Iterator it = nodes.keySet().iterator();
    while (it.hasNext()) {
      String ip = (String)it.next();
      float d = float(nodes.get(ip).toString());
  
      // Use last two IP address bytes for x/y coords
      splitter = ip.lastIndexOf(".");
      y = int(ip.substring(splitter + 1)) * height / 255; // Scale to applet size
      String tmp = ip.substring(0, splitter);
      splitter = tmp.lastIndexOf(".");
      x = int(tmp.substring(splitter + 1)) * width / 255; // Scale to applet size
  
      // Draw the node
      stroke(0);
      fill(color(100, 200)); // Rim
      ellipse(x, y, d, d); // Node circle
      noStroke();
      fill(color(100, 50)); // Halo
      ellipse(x, y, d + 20, d + 20);
  
      // Draw the text
      fill(0);
      text(ip, x, y);
  
      // Shrink the nodes a little
      nodes.put(ip, str(d * shrinkSpeed));
    }
  }
  
  // Called each time a new packet arrives
  synchronized void packetEvent(CarnivorePacket packet) 
  {
    println("[PDE] packetEvent: " + packet);
    // Remember these nodes in our hash map
    nodes.put(packet.receiverAddress.toString(), str(startDiameter));
    nodes.put(packet.senderAddress.toString(), str(startDiameter));
  }