Stuck with LoadSceneAsync | Official Unity Discord | Page 1

jovial kite Jun 16, 2023, 10:44 AM

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Hello there, I am stuck. The following code used to work perfectly with 1.0.0-pre.1 but the while loop neve rends with 1.0.0-pre.65. Any suggestion is appreciated otherwise I will be better of reverting to the previous version

           var sceneGuid = SceneSystem.GetSceneGUID(ref customWorldUnmanaged.GetExistingSystemState<SceneSystem>(), "Assets/Scene/CombiningBehaviours/Prefabs.unity");
         //   var sceneGuid = new Hash128("52b77c03e0aae864286b8f57b3216c18");
            var sceneEntity = SceneSystem.LoadSceneAsync(customWorldUnmanaged, sceneGuid);

            while (SceneSystem.IsSceneLoaded(customWorldUnmanaged, sceneEntity) == false)
            {
                customWorld.Update();
                await Task.Yield();
            }```

tidal bison Jun 16, 2023, 10:48 AM

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jovial kite Hello there, I am stuck. The following code used to work perfectly with 1.0.0-pr...

what exactly is the problem with it?

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ooh

jovial kite Jun 16, 2023, 10:49 AM

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the while loop never ends

sour ice Jun 16, 2023, 10:49 AM

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The game is still ticking frames right

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You aren't just stuck in the loop

jovial kite Jun 16, 2023, 10:50 AM

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you can see the world update in it

tidal bison Jun 16, 2023, 10:50 AM

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you sure guid is valid?

jovial kite Jun 16, 2023, 10:50 AM

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and let's not forget: it works with the previous version

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🙂

tidal bison Jun 16, 2023, 10:50 AM

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that's a really weird way of getting it

jovial kite Jun 16, 2023, 10:50 AM

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it's the documentation way

sour ice Jun 16, 2023, 10:50 AM

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jovial kite you can see the world update in it

I'm not asking if the world is updating

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I'm asking if the frames of the application are

jovial kite Jun 16, 2023, 10:51 AM

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it works with the previous version, I believe this should answer all the questions about the code

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my question is: why updating the DOTS package breaks it

sour ice Jun 16, 2023, 10:51 AM

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It does not

jovial kite Jun 16, 2023, 10:51 AM

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no?

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how so?

sour ice Jun 16, 2023, 10:52 AM

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are frames still ticking in unity

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while you run this loop

jovial kite Jun 16, 2023, 10:52 AM

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if it wasn't ticking, would have worked with the previous version of DOTS?

sour ice Jun 16, 2023, 10:52 AM

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maybe

jovial kite Jun 16, 2023, 10:52 AM

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ok the answer is: it's ticking

tidal bison Jun 16, 2023, 10:53 AM

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I'd rather update code for up-to -date manual
https://docs.unity3d.com/Packages/com.unity.entities@1.0/manual/streaming-loading-scenes.html

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or if you really want to figure that code: check whether guid , scene entity is valid

sour ice Jun 16, 2023, 10:53 AM

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the reason i ask is i remember we were having some weird issues with Task.Yield() in unity

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and we avoided it and just do a Task.Delay(1)

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but this was with old versions (2020)

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can you just confirm

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sceneEntity

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isn't Entity.Null

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apart from that i can't think of anything that would break here

jovial kite Jun 16, 2023, 10:57 AM

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sure, give me a minute because I am reverting the code to see if I spot any difference

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for some reason after the update Transform (V1) is not valid anymore

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so I changed more code than I like

sour ice Jun 16, 2023, 10:58 AM

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yeah it was only valid during pre to give people time to update

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but yeah i'm doing the same LoadSceneAsync and IsSceneLoaded

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though I'm not using tasks, just OnUpdate

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and i read SceneGUID directly from SubScene

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actually, just to confirm, your scene is in a subscene?

tidal bison Jun 16, 2023, 11:00 AM

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I believe in editor it should convert live either way

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(haven't actually tested though)

jovial kite Jun 16, 2023, 11:06 AM

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sour ice actually, just to confirm, your scene is in a subscene?

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all it does is just to hold some prefabs that I need to use as archetype

sour ice Jun 16, 2023, 11:06 AM

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(great name)

jovial kite Jun 16, 2023, 11:07 AM

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I appreciated the baking idea, but makes prototype harder imo

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but I am all for simplify so it's ok

tidal bison Jun 16, 2023, 11:10 AM

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you could just get reference to that SubScene monob and obtain guid from it

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(assuming loading code runs in monob)

jovial kite Jun 16, 2023, 11:17 AM

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2023 has even more problems with importing deadlocks 😦

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I had to kill unity at least 5 times already

edgy sable Jun 16, 2023, 11:17 AM

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jovial kite 2023 has even more problems with importing deadlocks 😦

Which 2023 version u are using?

jovial kite Jun 16, 2023, 11:17 AM

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I Was trying 2023.1 which is apparently out of beta now

sour ice Jun 16, 2023, 11:20 AM

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as far as i'm aware entities doens't officially support 2023 yet

edgy sable Jun 16, 2023, 11:30 AM

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jovial kite Hello there, I am stuck. The following code used to work perfectly with 1.0.0-pr...

I will suggest u dun use async await when interacting with entities api. It will give u unexpected result most of the time. UnityChanBugged

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Have u getting this error when using async await?
System.StackOverflowException: The requested operation caused a stack overflow.

sour ice Jun 16, 2023, 11:36 AM

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i think you have an infinite loop 😄

jovial kite Jun 16, 2023, 11:46 AM

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ok I reverted again to the previous version, but moved away from Translation to LocalTransform and it still works

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atm I 'll leave like this, I will be back to it another time 😛

jovial kite Jun 16, 2023, 1:54 PM

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I didn't realise that 1.0.8 was out

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doesn't work anyway

coral marlin Jun 16, 2023, 1:57 PM

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it's not just that it's loading the entity scene for a long time? if the loop doesn't end but the scene loading does work then you should see it in the editor

jovial kite Jun 16, 2023, 1:57 PM

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it desn't get stuck because it's async but it never shows up

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when I have time I will try the bake method

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defo the behaviour broke after .15-pre

coral marlin Jun 16, 2023, 1:59 PM

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i suspect you were already doing something that maybe shouldnt have worked

did you try with a coroutine instead of async?

jovial kite Jun 16, 2023, 1:59 PM

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async in unity works like coroutine

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it's all on the mainthread

coral marlin Jun 16, 2023, 2:00 PM

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i am aware but also out of other ideas based on the information available 😄

jovial kite Jun 16, 2023, 2:00 PM

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there are too many variables, like the fact that I use a custom world

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but one constant: it worked and then it didn't 🙂

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without changing my code

coral marlin Jun 16, 2023, 2:01 PM

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this is what we have in pre.65 and it works fine

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i load into the default world then copy into the other one though

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you are sure you have all the correct systems for this in your custom world?

coral marlin Jun 16, 2023, 2:02 PM

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jovial kite without changing my code

you can focus on that but it wont get you anywhere

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perhaps there is a problem in the scene itself, even though it looks really simple

jovial kite Jun 16, 2023, 2:03 PM

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 world = new World("Svelto<>DOTS world");

            var systems = DefaultWorldInitialization.GetAllSystems(WorldSystemFilterFlags.Default);
            DefaultWorldInitialization.AddSystemsToRootLevelSystemGroups(world, systems);
            World.DefaultGameObjectInjectionWorld = world;

coral marlin Jun 16, 2023, 2:03 PM

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maybe useless question, did you also try to clear the entity cache ?

jovial kite Jun 16, 2023, 2:04 PM

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I know where it gets stuck because I debugged it but for the moment I moved on

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 public static bool IsSectionLoaded(WorldUnmanaged world, Entity sectionEntity)
        {
            if (!world.EntityManager.HasComponent<SceneSectionStreamingSystem.StreamingState>(sectionEntity))
                return false;

            return (SceneSectionStreamingSystem.StreamingStatus.Loaded ==
                    world.EntityManager.GetComponentData<SceneSectionStreamingSystem.StreamingState>(sectionEntity).Status);
        }

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Status is never Loaded

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I will need to investigate why

tidal bison Jun 16, 2023, 3:20 PM

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did you check whether guid is valid?

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also

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wrap your call into try catch block

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if your task is silently gone

#Stuck with LoadSceneAsync