function QT_ARRAY_POP(
	world,
	bounds,
	max_objects = 4,
	max_levels = 4,
	level = 0,
) {
	if (QT_ARRAY.length > 0) {
		const _qt = QT_ARRAY.pop();
		_qt.world = world;
		_qt.bounds = bounds;
		_qt.max_objects = max_objects;
		_qt.max_levels = max_levels;
		_qt.level = level;
		return _qt;
	} else {
		return new QuadTree(world, bounds, max_objects, max_levels, level);
	}
}
will pop a quadtree object from the array
or create a new one if the array is empty
@ignore