How CopyTransformFromGameObject works?

Unity Engine
,
1

I have created object with Convert to entity component (Convert and Inject) and added CopyTransformFromGameObject component. So that if I move the game object, then the entity must follow it? But this does not happen. The entity remains in place.

With CopyTransformToGameObject - it works fine. Injected gameobject follows an entity.

2

So you added CopyTransformFromGameObjectProxy right?
That workflow is obsolete now but it should work. Anyway the thing is that it also adds GameObjectEntity which will create an extra entity.
What i suggest is that you create your own conversion for CopyTransformFromGameObject component data like this:

using Unity.Entities;
using Unity.Transforms;
using UnityEngine;

public class MyCopyTransformFromGameObjectProxy : MonoBehaviour, IConvertGameObjectToEntity {
  public void Convert(Entity entity, EntityManager dstManager, GameObjectConversionSystem conversionSystem) {
    dstManager.AddComponentData(entity, new CopyTransformFromGameObject());
  }
}

CopyTransformFromGameObject is processed by CopyTransformFromGameObjectSystem where transform values are copied to the entity LocalToWorld component data but you can also look at the source in Unity.Transforms package.

3

Yes

Why it is obsolete? Is there any better way to move an entity together with a game object?

4

What is obsolete is that conversion workflow, not the way of moving the object.
This is obsolete:

public class CopyTransformFromGameObjectProxy : ComponentDataProxy<CopyTransformFromGameObject> { }