Question How to get scene GUID and load scene in Entities 1.0.0

I have been trying to migrate a project from Entities 0.51.0 to Entities 1.0.0, and I'm having trouble with scene loading.

This is how I used to load and unload the game subscene in Entities 0.51.0:

Code (CSharp):

1.     public static class SceneManager
2.     {
3.         public const string GAME_SUBSCENE_NAME = "Assets/Path/To/Gameplay Subscene.unity";
4.  
5.         public static async Task LoadGameScene()
6.         {
7.             var sceneSystem = World.DefaultGameObjectInjectionWorld.GetExistingSystem<SceneSystem>();
8.             var guid = sceneSystem.GetSceneGUID(GAME_SUBSCENE_NAME);
9.             sceneSystem.LoadSceneAsync(guid);
10.  
11.             await Task.Delay(100);
12.         }
13.  
14.         public static async Task UnloadGameScene()
15.         {
16.             var entityManager = World.DefaultGameObjectInjectionWorld.EntityManager;
17.             var allEntities = entityManager.GetAllEntities();
18.             foreach (var entity in allEntities)
19.             {
20.                 if (entityManager.HasComponent<RequestSceneLoaded>(entity))
21.                     entityManager.RemoveComponent<RequestSceneLoaded>(entity);
22.             }
23.             await Task.Delay(500);
24.         }
25.     }

I think I need to replace

sceneSystem.LoadSceneAsync(guid);

with

SceneSystem.LoadSceneAsync(World.DefaultGameObjectInjectionWorld, guid);

And then, use

SceneSystem's

static method

public static unsafe Hash128 GetSceneGUID(ref SystemState state, string scenePath)

But it expects a

SystemState

parameter. How do I get it from a regular static class that is not a

SystemBase

or

ISystem

?

 

In your case


But as I highlighted - it's slow.
Proper usage is bake scenes GUIDs


Or having some MonoBehaviour referencing SubScene which contains public SceneGUID property

 

Thank you!