Ok.

src/org/graphstream/boids/Boid.java

@@ -92,27 +92,37 @@ public class Boid extends AdjacencyListNode {
 	}
 
 	protected void checkNeighborhood(BoidParticle... particles) {
+System.err.printf("Boid %s :%n", id);
 		if (particles != null) {
 			Iterator<Boid> it = getNeighborNodeIterator();
 			LinkedList<Boid> toRemove = null;
 
+System.err.printf("Sees [ ");
+for(BoidParticle p : particles) {
+	System.err.printf("%s ", p.getBoid().id);
+}
+System.err.printf("]%nHas Neighbors [ ");
 			while (it.hasNext()) {
 				boolean found = false;
 				Boid b = it.next();
 
-				for (BoidParticle p : particles)
+				for (BoidParticle p : particles) {
 					if (p.getId().equals(b.getParticle().getId())) {
 						found = true;
 						break;
 					}
-
+				}
+System.err.printf("%s(%b)", b.id, found);
+				
 				if (!found && !forces.isVisible(b.particle, this.getPosition())) {
 					if (toRemove == null)
 						toRemove = new LinkedList<Boid>();
+System.err.printf("(del)");
 
 					toRemove.add(b);
 				}
 			}
+System.err.printf("%n");
 
 			if (toRemove != null) {
 				for (Boid b : toRemove)
@@ -121,13 +131,16 @@ public class Boid extends AdjacencyListNode {
 				toRemove.clear();
 				toRemove = null;
 			}
-
+System.err.printf("adds link to [ ");
 			for (BoidParticle p : particles) {
-				if (getEdgeBetween(p.getBoid().getId()) == null)
+				if (getEdgeBetween(p.getBoid().getId()) == null) {
 					getGraph().addEdge(getEdgeId(this, p.getBoid()), getId(),
 							p.getBoid().getId());
+System.err.printf("%s ", p.getBoid().id);
+				}
 			}
 		}
+System.err.printf("]%n");
 	}
 
 	public static final String getEdgeId(Boid b1, Boid b2) {

src/org/graphstream/boids/Context.java

@@ -191,7 +191,7 @@ public class Context extends AdjacencyListGraph {
 		boidSpecies = new HashMap<String, BoidSpecies>();
 		//boidSpecies.put("default", new BoidSpecies(this, "default"));
 		getOrCreateSpecies("default");
-		space = new OctreeCellSpace(new Anchor(-2, -2, -2), new Anchor(2, 2, 2));
+		space = new OctreeCellSpace(new Anchor(-area, -area, -area), new Anchor(area, area, area));
 		pbox = new ParticleBox(maxParticlesPerCell, space, new BoidCellData());
 	}
 

src/org/graphstream/boids/gui/GUI.java

@@ -8,6 +8,7 @@ import java.awt.event.ActionListener;
 import javax.swing.JFrame;
 import javax.swing.Timer;
 
+import org.graphstream.boids.BoidSpecies;
 import org.graphstream.boids.Context;
 import org.graphstream.ui.swingViewer.Viewer;
 import org.graphstream.ui.swingViewer.util.Camera;
@@ -83,7 +84,9 @@ public class GUI extends JFrame implements ActionListener
 	public static void main(String args[]) {
 		Context ctx = new Context();
 		GUI gui = new GUI(ctx);
-		
+		BoidSpecies species = ctx.getDefaultSpecies();
+		species.angleOfView = 0;
+
 		for (int i = 0; i < 100; i++)
 			ctx.addNode(String.format("boid%03d", i));
 		

src/org/graphstream/boids/gui/ParticleViewer.java

@@ -57,7 +57,7 @@ public class ParticleViewer extends JPanel implements ParticleBoxListener,
 
 	protected float near = 1f;
 
-	protected float radius = 1.03f, theta, phi;
+	protected float radius = 1.3f, theta, phi;
 
 	protected Point3 camera;
 
@@ -67,7 +67,7 @@ public class ParticleViewer extends JPanel implements ParticleBoxListener,
 
 	protected Cube env;
 
-	protected Color background = new Color(0, 0, 0);
+	protected Color background = new Color(255, 255, 255);
 
 	// Constructors
 
@@ -201,7 +201,7 @@ public class ParticleViewer extends JPanel implements ParticleBoxListener,
 
 	public void display(Buffer buffer) {
 		setView();
-		// displayEnv();
+		displayEnv();
 		displayParticles();
 	}
 

src/org/graphstream/glutil/SwingBuffer.java

@@ -479,6 +479,7 @@ public class SwingBuffer
 	public void display()
 	{
 		canvas.display();
+		canvas.swapBuffers();
 	}
 
 	/**