Hello again,

I've been playing around with processing, and I'm really enjoying it. I am creating a few collision detection program and I'm having some problems. Here's what I do:
1. every second I create a Boid (object1) and add it to the boids ArrayList (max 20 boids)
2. every 3 seconds I create an AntiBoid (object2).and add it to the Antiboid ArrayList (max 3 antiboids)
3. they move randomly on screen, and when a boid collides with antiboid, I delete the boid from the array list.

when doing so, I randomly get a crash when adding a new boid, always the same problem: (I will not paste the full dump, don't worry )

1. j  com.sun.opengl.impl.GLImpl.glDeleteTextures1(ILjava/lang/Object;I)V+0
2. j  com.sun.opengl.impl.GLImpl.glDeleteTextures(I[II)V+64
3. j  codeanticode.glgraphics.GLTexture.releaseTexture()V+10
4. j  codeanticode.glgraphics.GLTexture.finalize()V+10

so it seems as the VM is deleting the object when it is time to add the object again, and that is when the problem occurs. any ideas on how to fix this? it is a very basic code:

1. //Draw boid!
2. println("Draw boid " + wanderers.size());
3.   for (int n = 0; n < wanderers.size(); n++) {
4.     Boid wanderBoid = (Boid)wanderers.get(n);
5.     if (dist(mouseX, mouseY, wanderBoid.location.x, wanderBoid.location.y) <= 100) {
6.         wanderBoid.timeCount = 0;
7.         wanderBoid.evade(new PVector(mouseX, mouseY));
8.     }
9.     else {
10.       wanderBoid.wander();
11.     }
12.     offscreen.beginDraw();
13.     offscreen.beginGL();
14.     wanderBoid.run(gl);
15.     offscreen.endGL();
16.     offscreen.endDraw(); 
17.   }
18. println("Draw antiboid water"); 
19. //Draw antiboid and calculate collissions.
20.   for (int n = 0; n < antiboids.size(); n++) {
21.     antiboid antiboid = (antiboid)antiboids.get(n);
22.     boolean delete = false;
23.     //check collision with boid!
24.    for (int b = 0; b < wanderers.size(); b++) {
25.       Boid wanderBoid = (Boid)wanderers.get(b);
26.       if (dist(antiboid._position.x, antiboid._position.y, wanderBoid.location.x, wanderBoid.location.y) <= 100) {
27.           //delete boid!!!!
28.           wanderers.remove(b);
29.           addboidCounter--;
30.           println("boid deleted " + wanderers.size());
31.       }
32.    }
33.     offscreen.beginDraw();
34.     offscreen.beginGL();
35.     antiboid.drawWater(gl);
36.     offscreen.endGL();
37.     offscreen.endDraw(); 
38.            
39.   }
40.   println(wanderers.size());
41. ...
42.  
43.   //add new boid?
44.   if (millis() > lastBirthTimecheck + 1000) {
45.     lastBirthTimecheck = millis();
46.     if (addboidCounter <  NUM_BOIDS) addboid((int)random(-10, width + 10), (int)random(-10, height +10));
47.   }
48.  
49.   //add new antiboid?
50.   if(((millis() > lastantiboidThrown + 5000 && antiboids.size() == 0) || (millis() > lastantiboidThrown + 3000 && antiboids.size() > 0)) && NUM_antiboidES > antiboids.size())
51.   {
52.     antiboids.add(new antiboid("bag", 125, new PVector(0, random(100,300)), 5, new PVector(5,5), 100, this));
53.     println("antiboid " + antiboids.size() + " Added");
54.   }

as you can see I have even set a

1.     offscreen.beginDraw();
2.     offscreen.beginGL();
3. ...   
   
4.     offscreen.endGL();
5.     offscreen.endDraw(); 
6. 
   

for every object, thinking that might be the problem (I only had one at the begining of the draw methond and the closing at the end.