Restarting scene get black screen on AR-Foundation Android

Unity Engine
, , ,
1

Restarting scene get black screen on AR-Foundation Android

I am working on a semi-old solution with unity 2020.3 that is using arfoundation.

On the first start of the AR scene everything works fine, BUT if I try to reopen the AR scene I get the black screen and get this error:

no active unityengine.xr.arsubsystems.xrsessionsubsystem is available

I already tried:

-reload scene
-reload a second scene and then reload the first one.
-destroy the objects before reload scene:

yield return new WaitForSeconds(1f);
           var cameraManager = FindObjectOfType<ARCameraManager>();
           if (cameraManager != null)
               Destroy(cameraManager.gameObject);
            yield return new WaitForSeconds(1f);
            ARSession arSession = FindObjectOfType<ARSession>();
           if (arSession != null)
               Destroy(arSession.gameObject);

-restart ar subsistem

XRGeneralSettings.Instance.Manager.StopSubsystems();
XRGeneralSettings.Instance.Manager.DeinitializeLoader();
yield return null; // Attendi un frame
XRGeneralSettings.Instance.Manager.InitializeLoaderSync();
XRGeneralSettings.Instance.Manager.StartSubsystems();

-deinizialize loader

 var xrManagerSettings = XRGeneralSettings.Instance.Manager;
        xrManagerSettings.DeinitializeLoader();
        SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex); // reload current scene
        xrManagerSettings.InitializeLoaderSync();

NOTHING seems to work and I do not know what else to do

any advice or solution?? Please help!!

2

You didn’t indicate AR Foundation version you use, but in ARF 5 we use these 2 files. Just place them in Assets folder:

  1. arfoundation-samples/Assets/Scripts/Runtime/SceneUtility.cs at 5.1 · Unity-Technologies/arfoundation-samples · GitHub
  2. arfoundation-samples/Assets/Scripts/Runtime/SceneUtilitySetup.cs at 5.1 · Unity-Technologies/arfoundation-samples · GitHub
3

Hello lkaro881,

The working AR Foundation package for Unity 2020:

… is 4.1. So the first question to ask would be which version(s) of AR Foundation are you encountering this issue with?

Having said that, the scene setup resources that makaka-org referenced may prove to be helpful.

Bear in mind that AR Foundation 4.1 has fallen out of official support, as has Unity 2020.

4

Also Unity 2020 is no longer supported so I would definitely suggest updating your project.

5

To add to Ciaran’s note, the current minimum supported LTS version of Unity is 2022.3.