Creating Generic IComponentData using SerializeReference [Solved]

Hello,

I made a [SelectableSubType] attribute that I used pretty frequently in Mono land since the birth of the [SerializeReference] attribute.

looks like this:


It's an easy way to setup "Actions" patterns without putting a bunch of components in the inspector.

Will there be support for creating generic data in DOTS? It doesn't seem to like this.

Code (CSharp):

1. [assembly: RegisterGenericComponentType(typeof(TestField))]
2. [assembly: RegisterGenericComponentType(typeof(TestField2))]
3. [assembly: RegisterGenericComponentType(typeof(TestField3))]
4.  
5. [DisallowMultipleComponent]
6. public class ComponentFieldTestAuthoring : MonoBehaviour, IConvertGameObjectToEntity
7. {
8.     [SerializeReference, SelectableSubType] public IFieldTest[] fieldTests;
9.  
10.     public void Convert(Entity entity, EntityManager dstManager, GameObjectConversionSystem conversionSystem)
11.     {
12.         for (int i = 0; i < fieldTests.Length; i++)
13.         {
14.             dstManager.AddComponentData(entity, fieldTests[i]);
15.         }
16.     }
17. }
18.  
19. public interface IFieldTest : IComponentData { }

The error I get:

ArgumentException: Unknown Type:`IFieldTest` All ComponentType must be 

known at compile time. For generic components, each concrete type must be registered 

with [RegisterGenericComponentType].

Or maybe it is possible and I am doing this wrong?

Thanks,

 

When using the add component the type must be defined.
You can work around this by making your IFieldTest implement a "self register" method where you pass in the entity and entity manager. Then you can do something like this on the self registering method.

em.AddComponentData(entity,this);

There may be other ways to do it if you have access entity manager internal method like getting the type through the type manager an using that to set the data but I am not a fan of forcing access to internal methods...

 

@WAYN_Games Thanks! It works! It's a little tedious without inheritance support but should do for now!

new code:

Code (CSharp):

1. [DisallowMultipleComponent]
2. public class ComponentFieldTestAuthoring : MonoBehaviour, IConvertGameObjectToEntity
3. {
4.     [SerializeReference, SelectableSubType] public IFieldTest[] fieldTests;
5.  
6.     public void Convert(Entity entity, EntityManager dstManager, GameObjectConversionSystem conversionSystem)
7.     {
8.         for (int i = 0; i < fieldTests.Length; i++)
9.         {
10.             if (fieldTests[i] != null)
11.                 fieldTests[i].SelfRegister(dstManager, entity);
12.         }
13.     }
14. }
15.  
16. [System.Serializable]
17. public struct TestField : IFieldTest
18. {
19.     public float testField1;
20.     public float testField2;
21.     public float testField3;
22.     public float testField4;
23.  
24.     public void SelfRegister(EntityManager manager, Entity entity)
25.     {
26.         manager.AddComponentData(entity, this);
27.     }
28. }