Question ecs beginner question

normally i want some data to be singleton data, here is how i tried this

Code (CSharp):

1. SystemAPI.SetSingleton(new GameData { Debug = false });

but
InvalidOperationException: No suitable code replacement generated, this is either due to generators failing, or lack of support in your current context

GameData

Code (CSharp):

1. using Unity.Entities;
2.  
3. namespace Game
4. {
5.     public struct GameData : IComponentData
6.     {
7.         public bool Debug;
8.     }
9. }
10.  

what i am doing wrong?

 

SystemAPI only works in specific contexts.

Seeing the error message you have means that the invocation of the SystemAPI method isn't in a valid place. As an alternative to using SystemAPI, you can equivalently call the appropriate APIs explicitly.

For singleton components specifically, you can see a list of some of relevant APIs here.

 

yes, i managed to figure this simple thing out, in MonoBehaviour you do it like this:

Code (CSharp):

1.  
2. if (Input.GetKeyDown(KeyCode.B))
3. {
4.     var query = _world.EntityManager.CreateEntityQuery(typeof(GameData));
5.     var data = query.GetSingleton<GameData>();
6.     data.Debug = !data.Debug;
7.     query.SetSingleton(data);
8.  
9.     Debug.Log("GameData.Debug: " + data.Debug);
10. }
11.  

and in SystemBase like this:

Code (CSharp):

1.  
2. var gameData = SystemAPI.GetSingleton<GameData>();
3. gameData.Debug = !gameData.Debug;
4. SystemAPI.SetSingleton(gameData);
5.  

now i wanted to place a prefab in GameData like this:

Code (CSharp):

1. public struct GameData : IComponentData
2.     {
3.         public bool Debug;
4.         public Entity Prefab;
5.     }

and to make authoring component like this:

Code (CSharp):

1. public class GameDataAuthoring : MonoBehaviour
2.     {
3.         public Entity Prefab;
4.     }
5.    
6.     public class BakeGameData : Baker<GameDataAuthoring>
7.     {
8.         public override void Bake(GameDataAuthoring authoring)
9.         {
10.             AddComponent(new GameData
11.             {
12.                 Debug = false,
13.                 Prefab = authoring.Prefab
14.             });
15.         }
16.     }

but it doesn't appear in the inspector, so i guess it has to be game object, but how to convert it then to entity? I made a prefab out of the game object that was in the subscene which i use for automatic conversion but it doesn't work. how to have prefab in the game data that i can place in the inspector and then access to spawn in the game?

 

Good place to start https://github.com/Unity-Technologies/EntityComponentSystemSamples

 

https://github.com/Unity-Technologi...lloCube/Assets/4. Prefabs/SpawnerAuthoring.cs