Load a subscene to a specific world

@sebas77 what are you wanting to achieve by loading into a separate world? Would you tell us about your project?

 

So right now this can be achieved but it could definitely be simpler. The idea is that when SubScene MB are enabled they'll register into every ECS world with a SceneSystem present at the time. Once that is done, it's a matter of adding the RequestSceneLoaded tag to the SubScene and SubScene sections we're interested in.

Now in practice, it would look something like this:

Code (CSharp):

1. public class MyCustomBootstrap : ICustomBootstrap
2. {
3.     public bool Initialize(string defaultWorldName)
4.     {
5.         World.DefaultGameObjectInjectionWorld = new World(defaultWorldName);
6.         var anotherWorld = new World("AnotherWorld");
7.  
8.         var systems = DefaultWorldInitialization.GetAllSystems(WorldSystemFilterFlags.Default);
9.  
10.         DefaultWorldInitialization.AddSystemsToRootLevelSystemGroups(World.DefaultGameObjectInjectionWorld, systems);
11.         ScriptBehaviourUpdateOrder.UpdatePlayerLoop(World.DefaultGameObjectInjectionWorld);
12.  
13.         systems.Add(typeof(TriggerSubSceneLoad));
14.  
15.         DefaultWorldInitialization.AddSystemsToRootLevelSystemGroups(anotherWorld, systems);
16.         ScriptBehaviourUpdateOrder.UpdatePlayerLoop(anotherWorld, ScriptBehaviourUpdateOrder.CurrentPlayerLoop);
17.  
18.         return true;
19.     }
20. }
21.  
22. [DisableAutoCreation]
23. public class TriggerSubSceneLoad : ComponentSystem
24. {
25.     Entity m_SceneEntity;
26.  
27.     protected override void OnUpdate()
28.     {
29.         if (m_SceneEntity == Entity.Null)
30.         {
31.             var sceneSystem = World.GetExistingSystem<SceneSystem>();
32.             var sceneHash = new Hash128("c4e67b524908a5446bf4e40bb4213bf9");
33.             m_SceneEntity = sceneSystem.GetSceneEntity(sceneHash);
34.             if (m_SceneEntity != Entity.Null)
35.             {
36.                 EntityManager.AddComponent<RequestSceneLoaded>(m_SceneEntity);
37.  
38.                 Entities.ForEach((Entity sceneSectionEntity, ref SceneSectionData sceneSectionData) =>
39.                 {
40.                     if (sceneSectionData.SceneGUID == sceneHash)
41.                         EntityManager.AddComponent<RequestSceneLoaded>(sceneSectionEntity);
42.                 });
43.             }
44.         }
45.     }
46. }