OnBecameVisible not working

I placed a script in an object:

Code (csharp):

1. private var vis = 0;
2.  
3. function OnBecameVisible () {
4.     renderer.enabled = true;
5.     vis = 0;
6.    
7. }
8.  
9. function OnBecameInvisible ()
10. {
11.     renderer.enabled = false;
12.     vis = 1;
13.    
14. }
15.  
16.  
17. function OnGUI (){
18.     if (vis == 1)
19. GUILayout.Label ("InVis");
20. }

(I placed the GUI in to confirm the object is invisible because I can't put the editor camera on it)

I made sure my editor camera is not on the object, when I start the game, the object is in view and is rendered and when the object goes out of view it becomes invisible as it should.

BUT, when I turn around it does not become visible, it stays invisible.

Can someone help me?

Thanks,

JL

 

Once it's not visible, you turn the renderer off, so OnBecameVisible can never be called.

Anyway, there's no point to this, since anything not in the view frustrum isn't rendered regardless.

--Eric

 

Yeah, I tried the same thing a while ago with the same results. It's never going to get the OnBecameVisible call because it's not being rendered. Catch-22.

I think the best thing to use the OnBecameVisible/Invisible calls for is to turn off particle effects or animations while the object is off camera.

It might be useful if Unity added an "OnBoundsInView" call so that we could do what you're trying to do.

 

Thanks,

You guys have saved me a ton of "trying to get it to work".

 

Animations are already disabled when off-camera, unless you choose "update when offscreen"; not sure about particles. I've only used this once, when I had some relatively heavy manually-computed mesh animation on some objects, which didn't need to be running if the player couldn't see them.

What is it that you're trying to do? Any object off-camera isn't rendered anyway, as I mentioned.

--Eric

 

Sorry, I was composing when you posted. I guess I knew that because the drawcalls drops when stuff goes out of view. Probably isn't a need then.

Edit: I just thought of something you could do with OnBoundsVisible. If you were doing a F.E.A.R.-style game where you wanted to spawn something scary, but not while the player is looking. The object could be placed with it's renderer off and not enable the renderer until the players back was turned (OnBoundsOutOfView). Then when they look back, YIKES!

 

One of the really great uses for it is changing UI states if you have onscreen information connected to them like position indicators, health bar etc. For example a position indicator might be especially of interest only while the object is offscreen.

 

public class ViewTester : MonoBehaviour {

MeshFilter meshFilter;
public Mesh mesh;

void Start()
{
meshFilter = GetComponent<MeshFilter> ();
}

void OnBecameVisible()
{
meshFilter.mesh = mesh;
Debug.Log ("Became Visible");

}


void OnBecameInvisible()
{
meshFilter.mesh = null;
Debug.Log ("Became Invisible");
}
}