convert empty GameObject to entity

Unity Engine
,
1

I would like to get into DOTS and started with a simple setup. I just want to have a Level component holding the current level and increasing it with a LevelUpSystem. So my component is

public struct LevelComponent : IComponentData
{
    public float Value;
}

For the system I tried to use the job system and burst compiler

public class LevelUpSystem : JobComponentSystem
{
    [BurstCompile]
    struct LevelUpJob : IJobForEach<LevelComponent>
    {
        public void Execute(ref LevelComponent level)
        {
            level.Value++;
        }
    }

    protected override JobHandle OnUpdate(JobHandle inputDeps)
    {
        LevelUpJob job = new LevelUpJob();
        return job.Schedule(this, inputDeps);
    }
}

Due to the fact I don’t have entities I created an empty GameObject and want to convert it to an entity. I attached the following script to it

public class LevelBehaviour : MonoBehaviour, IConvertGameObjectToEntity
{
    [SerializeField]
    private float initialLevel;

    public void Convert(Entity entity, EntityManager dstManager, GameObjectConversionSystem conversionSystem)
    {
        dstManager.AddComponentData(entity, new LevelComponent { Value = initialLevel });
    }
}

and set the initial level value to 3. When running the game there is no entity listed up in the Entity Debugger. Did I miss something?

I tried to add this setup to a minimalistic repository for reproduction

https://github.com/matthiashermsen/dots-playground/tree/master/Assets/Scripts

It would be awesome if someone could tell me what might be missing or wrong.

2

You need to attach ConvertToEntity component to the gameobject or put it in a subscene.

This might change in the next entities package update.

3

@BanJaxe ah thank you very much. Did I understand correctly (from your link) that I should always prefer creating a subscene for that GameObject? Because it’s way more easy to just attach that ConvertToEntity script :slight_smile:

And by the way … Is it already planned when the package will be out from the preview? It feels like everything changes from week to week :hushed:

4

Yes it does changes often, as DOTS is officially not for production ready.

5

On Unity it was told that DOTS will go out of preview around the release of unity 2010.1

6

True, I recall that message too.

And even then, DOTS packages don’t stop evolve. So is expected there will be 1.0.1, 1.1.3. etc.