public void GetCollidableObjects(XboxHashSet<CollisionBody> list, CollisionBody container, float minX, float minY, float maxX, float maxY) { if (children == null) { //if (this.containerList.Contains(container)) //{ /*foreach (CollisionBody bodyFromList in this.items) { list.Add(bodyFromList); }*/ list.MergeInto(this.items); //} } else { for (int i = 0; i < 4; i++) { bool inside = true; QuadTreeNode child = this.children[i]; if (child.x1 > maxX || child.x2 < minX || child.y1 > maxY || child.y2 < minY) inside = false; if (inside) { if (child.children == null) { /*foreach (CollisionBody bodyFromList in child.items) { list.Add(bodyFromList); }*/ list.MergeInto(child.items); } else { child.GetCollidableObjects(list, container); } } } } }