System groups not appearing in Entity Debugger when using custom worlds

I'm trying to set up multiple worlds with system groups bound to various PlayerLoop levels, they don't appear inside the Entity Debugger, despite actually being called by the PlayerLoop.

Using the Unity.Entities.ScriptBehaviourUpdateOrder.UpdatePlayerLoop does bind it inside Entity Debugger, but only for the SimulationSystemGroup, PresentationSystemGroup and InitializationSystemGroup added internally. (com.unity.entities@0.8.0-preview.8\Unity.Entities\ScriptBehaviourUpdateOrder.cs)

Copying over the exact same code from the package and calling it the same way on the other hand doesn't bind it.

World initialization with UpdatePlayerLoop (only for the built-in system groups)

Code (CSharp):

1.  
2. this.ecs_world = new Unity.Entities.World(this.ToString());
3. var playerLoop = PlayerLoop.GetCurrentPlayerLoop();
4.  
5. Unity.Entities.ScriptBehaviourUpdateOrder.UpdatePlayerLoop(this.ecs_world, playerLoop);
6.  

World initialization with custom code

Code (CSharp):

1.  
2. public void InitializeECS()
3. {
4.     this.ecs_world = new Unity.Entities.World(this.ToString());
5.     var playerLoop = PlayerLoop.GetCurrentPlayerLoop();
6.  
7.     for (var i = 0; i < playerLoop.subSystemList.Length; ++i)
8.     {
9.         ref var subSystem = ref playerLoop.subSystemList[i];
10.  
11.         if (subSystem.type == typeof(Initialization)) this.initializationSystemGroup = this.AddSystem<CustomInitializationSystemGroup>(ref subSystem);
12.         else if (subSystem.type == typeof(FixedUpdate)) this.fixedUpdateSystemGroup = this.AddSystem<CustomFixedUpdateSystemGroup>(ref subSystem);
13.     }
14.  
15.     PlayerLoop.SetPlayerLoop(playerLoop);
16. }
17.  
18. public T AddSystem<T>(ref PlayerLoopSystem subSystem) where T : Unity.Entities.ComponentSystemGroup, new()
19. {
20.     ref var subsystemList = ref subSystem.subSystemList;
21.     Array.Resize(ref subsystemList, subsystemList.Length + 1);
22.  
23.     var system = this.ecs_world.AddSystem(new T());
24.  
25.     var playerLoopSystem = new PlayerLoopSystem();
26.     playerLoopSystem.type = typeof(T);
27.     playerLoopSystem.updateDelegate = system.Update;
28.  
29.     subsystemList[subsystemList.Length - 1] = playerLoopSystem;
30.  
31.     return system;
32. }
33.  

 

You should be able to select the custom world from Worlds list in Dropdown on top left corner of Entity Debugger.

 

It does show up there, but without any systems assigned to it.

 

Systems in your world should be in default player loop (yes - created in your world but added to default player loop top level groups - Initialization\Simulation\Presentation

https://docs.unity3d.com/Packages/c...e_order.html?q=Multiple World#multiple-worlds

 

It should fully support custom loop entries. The built in ECS groups are impossible to order around in some cases due to the end command buffer systems being forced last. Probably other use cases as well.