Object accecable from all scenes

Unity Engine
1

I new to unity and I am wondering if It is possible to create an object(not derived from MonoBehavior perse) that doesn’t get destroyed when another scene is loaded.
I want to be able to access the player’s total score among other things. But if I construct an object within a scene, it is gone when the next scene is loaded, right?

2

You should use somehing like this:

function Awake () {
    DontDestroyOnLoad (transform.gameObject);
}
3

Thanks, so that object doesn’t get destroyed when I load a new scene.
But what happens if I load the original scene again after that? Will that object be newly created because the create script is run again?

4

yupp it will.
The solution is to first check if an instance of this class already exists

function Awake () {
  if (FindObjectsOfType(thisScriptsName).Length > 1)
  {
    DestroyImmediate(gameObject)
  } else {
    DontDestroyOnLoad (gameObject);
  }

}

I would also consider moving the dontdestroy etc up here from awake to start, that way you can be assured that all objects are known that were part of the scene

5

Thanks for the quick replies!! I will have a go at this tonight:-)

6

This is called the Singleton design pattern, or at least that’s what your asking for.

This may help more too: http://wiki.unity3d.com/index.php?title=Singleton