Resolved Wait for a "Network.Singleton.Scene" to be fully loaded. Help!!

Hi everyone!

I want to wait for a scene to be fully loaded before executing some code. For a regular Scene Manager you could just use the async operation:

Code (CSharp):

1. private IEnumerator WaitForSceneToLoad()
2.     {
3.         var asyncLoadLevel = SceneManager.LoadSceneAsync(gameSceneName, LoadSceneMode.Single);
4.         while (!asyncLoadLevel.isDone)
5.         {
6.             Debug.Log("Loading Scene");
7.             yield return null;
8.         }
9.         //Do whatever
10. }

However, there's no equivalent for a

Network.Singleton.SceneManager

. The following piece of code will not work:

Code (CSharp):

1. private IEnumerator WaitForSceneToLoad()
2.     {
3.         var asyncLoadLevel = NetworkManager.Singleton.SceneManager.LoadScene(gameSceneName, LoadSceneMode.Single);
4.         while (!asyncLoadLevel.isDone) //Here's the problem, there's no "isDone" for network
5.         {
6.             Debug.Log("Loading Scene");
7.             yield return null;
8.         }
9.        //Do whatever
10.  
11.     }

Is there an alternative to check if a scene loaded through the NetworkManager is completed?

 

If this is for Netcode for GameObjects take a look at the NetworkManager.Singleton.SceneManager.On* callbacks, sounds like you want OnLoadComplete or OnLoadEventCompleted.

 

Thank you. Indeed, a callback is even better than I expected. I saw in the documentation that in order to use it you have to implement the

public delegate void OnLoadCompleteDelegateHandler(ulong clientId, string sceneName, LoadSceneMode loadSceneMode);

Apart from this, I have no idea how this callback works though. Could you please give me an example of it?

 

The way it works is you pass a function to subscribe to a particular event, when that event occurs the function is called. This is more efficient than continuously polling to check if that event has happened.

Here's a simple example,

Code (CSharp):

1.     // subscribe to OnLoadComplete event
2.     NetworkManager.Singleton.SceneManager.OnLoadComplete += OnLoadComplete;
3.     .
4.     .
5.     .
6.     // called when scene load complete
7.     private void OnLoadComplete(ulong clientId, string sceneName, LoadSceneMode loadSceneMode)
8.     {
9.         Debug.Log("OnLoadComplete clientId: " + clientId + " scene: " + sceneName + " mode: " + loadSceneMode);
10.     }

 

Thank you!

I imagine the OnLoadComplete function will trigger for any scene that is fully loaded. Is there a way to specify a scene for it to work?

 

Outside of filtering on sceneName I'm not sure, I don't use the scene callbacks as I do my own scene management. What I do have is a test project that subscribes to all callbacks, it's handy for testing anything network related and I would recommend setting up a test project yourself.

 

I'm getting this error

 

If you want to take an action on an event, like make an ServerRpc call, you need to put that inside your event callback function:

Code (CSharp):

1.    private void OnLoadComplete(ulong clientId, string sceneName, LoadSceneMode loadSceneMode)
2.     {
3.         Debug.Log("OnLoadComplete clientId: " + clientId + " scene: " + sceneName + " mode: " + loadSceneMode);
4.  
5.         SpawnGameManagerServerRpc();
6.     }

As it stands OnLoadComplete is going to be called on loading a scene on each client, in case you only want to spawn the game manager once.

 

I think I'm missing some code that allows this to work.

It reminds me of Input Callbacks, for "PointerClick" for example, where you have to put this at the top of the script:

E.g.:

Code (CSharp):

1. public class Example : MonoBehaviour, IPointerClickHandler //this bad boy right here

 

You don't want the brackets on += OnLoadComplete() as you're referencing it rather than calling it.

Code (CSharp):

1. NetworkManager.Singleton.SceneManager.OnLoadComplete += OnLoadComplete;

 

I'm a complete moron. That did the trick. Thank you!