Feature Request True Entity Prefab needed.

I want a true entity prefab, similar to Unity prefabs, that can be saved in the project, packaged as an asset bundle, and loaded when needed and released when not needed. Why isn't there an editor tool that allows us to easily convert Unity prefabs into entity prefabs and save them in the project?

 

SubScenes (kind of an asset bundle) and content management allow you to do pretty much exactly what you ask.

Look at SceneSystem.LoadPrefabAsync and EntityPrefabReference

 

Thanks, I found PrefabComponent, I will attempt to save data in a ScriptableObject, then dynamically assemble the entity at runtime, and finally add the PrefabComponent to generate an entity prefab.
Afterward, I will take a look at the EntityPrefabReference.

 

I never got SceneSystem.LoadPrefabAsync() to work. Can you show code how it is done?

 

There's samples for streaming now, PrefabAndSceneReferences found here (but there's 4 other samples as well a folder back)

https://github.com/Unity-Technologi...les/Assets/Streaming/PrefabAndSceneReferences

Code (CSharp):

1. // request load weak prefab references
2. foreach (var (weakPrefabReference, entity) in
3.          SystemAPI.Query<RefRO<PrefabReference>>()
4.              .WithNone<RequestEntityPrefabLoaded>()
5.              .WithEntityAccess())
6. {
7.     ecb.AddComponent(entity, new RequestEntityPrefabLoaded
8.     {
9.         Prefab = weakPrefabReference.ValueRO.Value
10.     });
11. }
12.  
13. // instantiated the weak prefab references once they're loaded
14. foreach (var (prefabLoadResult, entity) in
15.          SystemAPI.Query<RefRO<PrefabLoadResult>>()
16.              .WithAll<PrefabReference>()
17.              .WithEntityAccess())
18. {
19.     ecb.Instantiate(prefabLoadResult.ValueRO.PrefabRoot);
20.     ecb.RemoveComponent<PrefabReference>(entity);
21. }

the core sample code for loading

-edit-
oh i guess this specific sample didn't answer your question as you asked about LoadPrefabAsync not EntityPrefabReference

AssetLoadingSystem has an example of this api

https://github.com/Unity-Technologi...reaming/AssetManagement/AssetLoadingSystem.cs

 

it only work in editor!
when can we get examples of mobile?

 

I got it working but only in Editor because the constructor EntityPrefabReference(GameObject) is editor only. Why is this?

 

Are you using Baker? The baking process happens during the build process, and it won't be called again after packaging it into an APK (baking has already been completed).

 

Baking is not triggered if you only reference it by EntityPrefabReference in the build process.
You have to reference it by a Subscene.
You can make a scene with a Subscene component assoicated with the scene you used with EntityPrefabReference.
Add that scene with subscene in you build scene list, it will trigger baking when you build.

A easy way to know if you entity is baked: Add logs in the baker in your authoring class.

 

No, not using Baker. I wanted to preload "entity prefabs" at runtime without using a Baker. Is this even possible?

 

It is possible by assemble entities at runtime, add components, and set values. Then, add a prefab (component) to the entity. There may be other methods available in the future.