Method _set_tree

scene/main/node.cpp:3368–3397

}

void Node::_set_tree(SceneTree *p_tree) {
	SceneTree *tree_changed_a = nullptr;
	SceneTree *tree_changed_b = nullptr;

	//ERR_FAIL_COND(p_scene && data.parent && !data.parent->data.scene); //nobug if both are null

	if (data.tree) {
		_propagate_exit_tree();

		tree_changed_a = data.tree;
	}

	data.tree = p_tree;

	if (data.tree) {
		_propagate_enter_tree();
		if (!data.parent || data.parent->data.ready_notified) { // No parent (root) or parent ready
			_propagate_ready(); //reverse_notification(NOTIFICATION_READY);
		}

		tree_changed_b = data.tree;
	}

	if (tree_changed_a) {
		tree_changed_a->tree_changed();
	}
	if (tree_changed_b) {
		tree_changed_b->tree_changed();
	}
}

#ifdef DEBUG_ENABLED
static HashMap<ObjectID, List<String>> _print_orphan_nodes_map;