Slick Forums

virtual void processEntities(artemis::ImmutableBag<artemis::Entity*>& bag)
{
   creatCollisionBuckets(bag); // Seperate objects into their own space coordinates.
      
   for(int i=0; i< collisionBuckets->getCapacity(); i++) // loop trough our complete grid
   {
      artemis::Bag<artemis::Entity*> * bucket = collisionBuckets->get(i);
                     
                // If our bucket is empty or has one continue.
      if(bucket->isEmpty() || bucket->getCount() == 1) continue;

      for(int j=0; j < bucket->getCount(); j++) // Check bucket against itself index j
      {
             artemis::Entity& ej = *bucket->get(j);

         for(int k=j+1; k < bucket->getCount(); k++) // index k
         {
            //Do collision action
            artemis::Entity& ek = *bucket->get(k);

             //Perform collision relevance            
              // if allowed do intersection check
            if(intersects(ej,ek)){
            // ej collides with ek.
                          ****
            }
         }
      }
   }
}

collisionSystem.addGroupToGroupCollisionHandler(Groups.Bullets, Groups.Actors, new CollisionHandler() {
  @Override
  public void check(Entity bullet, Entity actor) {
     if(teamManager.getTeam(bullet) != teamManager.getTeam(actor)) {
        // You decide what to do with bullet, most likely just: bullet.delete();
        // And you'll most likely just decrease health of actor here,
        // or add a new component to entity specifying some action to
        // be processed by another system.
     }
  }
});

CollisionComponent {
   bounding box;
   entities in contact;
}

         
  // first thing is to clear all the contacts from the previous state

  .....

  if(intersects(e1,e2)){
                          e1.getComponent(CollisionComponent).addContact(e2);
                          e2.getComponent(CollisionComponent).addContact(e1);
  }