arkit - How to get the distance from SceneDepth data in Xamarin.iOS?

Question

I am going to access ARDepthDatain Xamarin.iOS. So far my code is like this.

public override void ViewDidAppear(bool animated)
    {
        base.ViewDidAppear(animated);
        if (!ARWorldTrackingConfiguration.SupportsFrameSemantics(ARFrameSemantics.SceneDepth))
        {
            UIAlertController alertController = UIAlertController.Create("Unsupported Device", "SceneDepth is not available on current device", UIAlertControllerStyle.Alert);
            alertController.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
            PresentViewController(alertController, true, null);

        }
        else
        {
            UIAlertController alertController = UIAlertController.Create("Yay", "Congratulations! Your device supports SceneDepth", UIAlertControllerStyle.Alert);
            alertController.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
            PresentViewController(alertController, true, null);
            configuration = new ARWorldTrackingConfiguration
            {
                FrameSemantics = ARFrameSemantics.SceneDepth,
                PlaneDetection = ARPlaneDetection.None
                
            };
            sceneView.Session.Delegate = new SessionDelegate();
            sceneView.Session = session;
            sceneView.Session.Run(configuration);
     }

My SessionDelegate class is like this.

 public class SessionDelegate : ARSessionDelegate
{
    public SessionDelegate()
    {
    }

    public override void DidUpdateFrame(ARSession session, ARFrame frame)
    {
        base.DidUpdateFrame(session, frame);
        Console.WriteLine("Frame has been updated");
        if (frame.SceneDepth != null)
        {

            Console.WriteLine("Depth data is not null");
        }
    }
}

My app just opens up the camera view. The above delegate is not firing. What am I missing here? When does this delegate fire and how can I get the distance from SceneDepthData?

Thank you!

question from:https://stackoverflow.com/questions/65896210/how-to-get-the-distance-from-scenedepth-data-in-xamarin-ios

Answer 1

Waitting for answers