Handling Tracking Loss

If the Magic Leap can't locate its position in an environment, it experiences "tracking loss". The Magic Leap 2 lets developers manage their own tracking loss behavior -- some developers may want to pause the update loop and display a splash image, while others may want the app to continue playing.

If tracking is lost and cannot be recovered for 15 seconds, Magic Leap 2 will reset its tracking origin the next time tracking is recovered. The origin is reset to avoid virtual content from appearing in the incorrect location.

Head Pose / Origin Reset

This example shows how to listen to the OnTrackingOriginChanged event.

    private void Start()
    {
        XRInputSubsystem inputSubsystem = XRGeneralSettings.Instance?.Manager?.activeLoader
            ?.GetLoadedSubsystem<XRInputSubsystem>();
        if(inputSubsystem !=null )
            inputSubsystem.trackingOriginUpdated += OnTrackingOriginChanged;
    }

    private void OnDestroy()
    {
        XRInputSubsystem inputSubsystem = XRGeneralSettings.Instance?.Manager?.activeLoader
            ?.GetLoadedSubsystem<XRInputSubsystem>();
        if (inputSubsystem != null)
            inputSubsystem.trackingOriginUpdated -= OnTrackingOriginChanged;
    }

    /// Use event to detect if a new session occurs
    /// <param name="inputSubsystem"> The inputSubsystem that invoked this event.</param>
    private void OnTrackingOriginChanged(XRInputSubsystem inputSubsystem)
    {
        //...
    }