Method remove_child

scene/main/node.cpp:1747–1784

}

void Node::remove_child(Node *p_child) {
	ERR_FAIL_COND_MSG(data.tree && !Thread::is_main_thread(), "Removing children from a node inside the SceneTree is only allowed from the main thread. Use call_deferred(\"remove_child\",node).");
	ERR_FAIL_NULL(p_child);
	ERR_FAIL_COND_MSG(data.blocked > 0, "Parent node is busy adding/removing children, `remove_child()` can't be called at this time. Consider using `remove_child.call_deferred(child)` instead.");
	ERR_FAIL_COND(p_child->data.parent != this);

	/**
	 *  Do not change the data.internal_children*cache counters here.
	 *  Because if nodes are re-added, the indices can remain
	 *  greater-than-everything indices and children added remain
	 *  properly ordered.
	 *
	 *  All children indices and counters will be updated next time the
	 *  cache is re-generated.
	 */

	data.blocked++;
	p_child->_set_tree(nullptr);

	remove_child_notify(p_child);
	p_child->notification(NOTIFICATION_UNPARENTED);

	data.blocked--;

	data.children_cache_dirty = true;
	bool success = data.children.erase(p_child->data.name);
	ERR_FAIL_COND_MSG(!success, "Children name does not match parent name in hashtable, this is a bug.");

	p_child->data.parent = nullptr;
	p_child->data.index = -1;

	notification(NOTIFICATION_CHILD_ORDER_CHANGED);
	emit_signal(SNAME("child_order_changed"));

	if (data.tree) {
		p_child->_propagate_after_exit_tree();
	}
}

void Node::_update_children_cache_impl() const {
	// Assign children