Question Systems start before MonoBehaviour.Awake()

Hi,

i have a singleton monobehaviour where i have assigned all the stuff (materials, meshes etc) i need for my systems. I also use Odin to nicely format everything.

But now i have a problem: Some systems need some stuff in the OnCreate Method which is computed in the Awake() method of the singleton. The problem is that the OnCreate methods of the systems are started before the Awake Method happens...

I now cannot use the Singleton as a "resource manager" anymore...

Any ideas to solve this?

 

I am also using this method for material referencing for systems that need those.
Have you tried instead of OnCreate, using OnStartRunning?

 

Yes, this is true. However, OnStartRunning() runs only if the system starts running. In a case it doesn't find any queries available, it doesn't run. It might be a problem here.

 

My systems start running on startup so this wouldnt work right?

 

You have a few options:
1) Make the resource management a hybrid component.
2) Add an event that systems can subscribe to that get invoked from Awake.
3) Have a system that reacts ti a hybrid component and then invokes events that other systems can subscribe to.

Personally I would go with option 1, but if I really needed state in the system option 3 isn't bad because it also avoids statics.

 

I went with 4.) have a "GetResourceX" method on that singleton which creates the resource if it doesnt exist

Its maybe the simplest of all methods, but now i need to do that for each resource which needs computation

 

If your monobehaviour is run first, the created entities that will act as prefabs should already exist and so, it should always find those queries in the systems.

 

Puts your data in ScriptableObject's and load them with Resources.Load. You can also have a singleton SO that contains other SO's. That's the simplest most direct approach I know of.

 

To get you started. This leverages naming to avoid hard coding strings as far as the resources themselves, just name your SO after it's type. Add fields that contain other SO's to use it as an SO container.

Code (csharp):

1.  
2. [CreateAssetMenu(menuName = @"Custom/GameConfigData")]
3.     public class GameConfigData : ScriptableObject
4.     {
5.         private static GameConfigData instance;
6.         public static GameConfigData Instance
7.         {
8.             get
9.             {
10.                 if (instance == null)
11.                 {
12.                     instance = Resources.Load(typeof(GameConfigData).Name, typeof(GameConfigData)) as GameConfigData;
13.                 }
14.                 return instance;
15.             }
16.         }
17.  
18.     }
19.  

 

You can also tag the systems with the

[DisableAutoCreation]

attribute:
https://docs.unity3d.com/Packages/c...ty.Entities.DisableAutoCreationAttribute.html
And manually create the systems that need initialization to happen after the Awake of MonoBehaviours.