Sending messages

Unity Engine
1

Hi

Do anybody knows how to send messages or parameters to anywhere within a Unity project?

-“SendMessage” is sending within a game object
-“SendMessageUpwards” is sending within a game object and to a parent of it
-“BroadcastMessage” is sending within a game object and down to its children

But how can one send messages (or parameters) to a script anywhere within the whole project.

Thanks for a littel hint
visualizer.ch

2

i dont know bout the entire project, but as far as within a single scene, any objects… you can iterate through them.

for(var go : GameObject in GameObject.FindObjectsOfType(GameObject)){
  go.SendMessage("blah", SendMessageOptions.DontRequireReciever);
}
3

Depending on your needs, you may want to roll your own event or messaging solution, ranging from dead simple to very complex. The wiki has a few examples.

4

You could use any of the pre-existing message functions with GameObject.Find I think. Something like:

GameObject.Find("/Parent/Child").BroadcastMessage(...etc.

But as Jasper said, if this isn’t enough the wiki has a couple of really easy to use systems that do this for you.

5

If you are looking to send a message to a single script, such as a GameController - that should only appear once in the scene - your best bet is to use a singleton pattern.

	static GameController _instance;
	public static GameController Instance {
		get {
			if (_instance == null){
				GameObject go = GameObject.FindGameObjectWithTag("GameController");
				_instance = go.GetComponent<GameController>();
			}
			
			return _instance;
		}
	}

     public void TestFunction(){}

Then you can talk to GameController (or whatever your class is) anywhere in the project by saying things like:

GameController.Instance.TestFunction()