ComponentSystem: Is there something as OnFixedUpdate()?

Hello my curious ECS friends!

I'm currently porting over a script that relies on beeing called on FixedUpdate. Is there some attribute or similar that allows me to do so?

 

If you put [UpdateBefore/After(typeof(FixedUpdate))] attribute on your system class it will be in a FixedUpdate step (but run before/after all other usual fixed updates) Requires `using UnityEngine.Experimental.PlayerLoop;`

 

Yes, exacly what I was looking for! Many thanks!

 

Ignoring invalid [UpdateBefore] dependency for EntitymoveSystem: UnityEngine.Experimental.PlayerLoop.FixedUpdate must be a member of the same ComponentSystemGroup.

i have try using UnityEngine.Experimental.PlayerLoop
and add the attribute
and oh my i get this error @@ is it not working now or i did something wrong

 

that's deprecated. now the systems are in an update hierarchy and they belong to a group.
there exist 3 root groups: Initialization, Simulation, and Presentation.
Simulation (the default) is meant to be updated in FixedUpdate. but it's currently not because of internal problems with it.
as a workaround, you can create your group and manually update it in a MonoBehaviour.FixedUpdate. there is a sample for that in the samples repo

 

excuses me , may i have a link to the repo or give me some tips how to find that

 

Repo : https://github.com/Unity-Technologies/EntityComponentSystemSamples

For update order docs + others there is an .md in the package folder you could read. And it is available online if you click on the documentation blue text on the UPM. For example the file you are looking for became this page online : https://docs.unity3d.com/Packages/com.unity.entities@0.0/manual/system_update_order.html

*additionally I have wrote about this before, if you prefer longer paraphrase of that page : https://gametorrahod.com/world-system-groups-update-order-and-the-player-loop/

 

thank you!