How do i use the Attach Component in Hybrid Mode ?

Yes - That's a question ...

I can do it in code, but in hybrid, i don't know how to do this...

 

You're asking about how to add the component to the gameobject?

Add the Component monobehavior like any other script to the gameobject in the scene view / project view.

If it's missing from the list, then you need to implement ComponentDataWrapper, or shared wrapper based on what type of component you're trying to add.

Simplest thing is to convert the gameobject with a bunch of components on it I found is the:

Code (CSharp):

1. Entity entity = EntityManager.Instantiate(gameobject);

 

You cannot put a gameObject in there, as it looks.
Has to be an entity

 

If you mean create it in the editor without code you can't just because Entities won't serialize in the inspector.
What i did was to create a monobehaviour for the Attach component.

Code (CSharp):

1. [ExecuteInEditMode]
2. public class AttachHybridComponent : MonoBehaviour {
3.   public GameObjectEntity Parent;
4.   public GameObjectEntity Child;
5.  
6.   private void Start() {
7.     var em = World.Active.GetOrCreateManager<EntityManager>();
8.     var e = em.CreateEntity();
9.     em.AddComponentData(e, new Attach {
10.       Child = Child.Entity,
11.       Parent = Parent.Entity
12.     });
13.   }
14. }

Then you must create 3 game objects:
1- Parent with at least a Position/Rotation/Scale Component
2- Child with at least Position/Rotation/Scale Component
3- Attach with the monobehaviour AttachHybridComponent and both parent and child enities assigned

In alternative you can just add LocalToWorld instead of Position/Rotation/Scale.

Hope it helps!

 

That's looking quite good !
But why do you have to ExecuteInEditMode, as the entity manager runs on runtime ?

Last - doesn't want to smart aleck, but i choose to set also [RequireComponent(typeof(LocalToWorld))] or sth. like this on top for mandatory things !

 

The ExecuteInEditMode is for allowing you to see the attachment without having to hit play, it is deprecated now so you should use ExecuteAlways instead.
The [RequireComponent(typeof(LocalToWorld))] makes no sense here because you don't want to add that to the attach gameobject but rather to the Parent and Child gameobjects.
You could add this to the Start or Reset function:

Code (CSharp):

1.     if (!Parent.GetComponent<LocalToWorldComponent>())
2.       Parent.gameObject.AddComponent<LocalToWorldComponent>();
3.     if (!Child.GetComponent<LocalToWorldComponent>())
4.       Child.gameObject.AddComponent<LocalToWorldComponent>();

 

You can. (p23) Just attach components (!) to the gameobject. Sure default monobehaviours won't fit.

EntityManager.Instantiate(gameObject) creates an entity that has every component data / shared data attached to it as in prefab.

Entities won't serialize in inspector. But ComponentData / SharedData will. I'm using default prefabs as templates, and prepare them as entities in bootstrap phase. Works like a charm for me.

 

In my current preview, it only sais:

EntityManager.Instantiate(Entity entity), and he really doesn't like me to put a gameobject in, so i don't get, what you are saying.

 

It's from EntityManagerExtensions class. From Unity.Entities.Hybrid