/// <summary>
/// Updates the session display geometry if a change was posted by
/// <see cref="Framework.Services.Platform.OnScreenSizeChanged"/> event.
/// This function should be called explicitly before each call to
/// <see cref="Google.AR.Core.Session.Update"/>. This function will also clear the 'pending update'
/// (viewportChanged) flag.
/// </summary>
/// <param name="session">the <see cref="Google.AR.Core.Session"/> object to update if display geometry changed.</param>
private void UpdateDisplayGeometryIfNeeded(Google.AR.Core.Session session)
{
if (this.viewportChanged)
{
SurfaceOrientation displayRotation;
this.platform.DisplayOrientation.ToSurfaceOrientation(out displayRotation);
session.SetDisplayGeometry((int)displayRotation, this.platform.ScreenWidth, this.platform.ScreenHeight);
this.viewportChanged = false;
}
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.Main);
mSurfaceView = FindViewById(Resource.Id.surfaceview) as GLSurfaceView;
mDisplayRotationHelper = new DisplayRotationHelper(this);
Java.Lang.Exception exception = null;
string message = null;
try {
mSession = new Session(/*context=*/ this);
} catch (UnavailableArcoreNotInstalledException e) {
message = "Please install ARCore";
exception = e;
} catch (UnavailableApkTooOldException e) {
message = "Please update ARCore";
exception = e;
} catch (UnavailableSdkTooOldException e) {
message = "Please update this app";
exception = e;
} catch (Java.Lang.Exception e) {
exception = e;
message = "This device does not support AR";
}
if (message != null)
{
Toast.MakeText(this, message, ToastLength.Long).Show();
return;
}
// Create default config, check is supported, create session from that config.
var config = new Config(mSession);
if (!mSession.IsSupported(config))
{
Toast.MakeText(this, "This device does not support AR", ToastLength.Long).Show();
Finish();
return;
}
mGestureDetector = new Android.Views.GestureDetector(this, new SimpleTapGestureDetector {
SingleTapUpHandler = (MotionEvent arg) => {
onSingleTap(arg);
return(true);
},
DownHandler = (MotionEvent arg) => true
});
mSurfaceView.SetOnTouchListener(this);
// Set up renderer.
mSurfaceView.PreserveEGLContextOnPause = true;
mSurfaceView.SetEGLContextClientVersion(2);
mSurfaceView.SetEGLConfigChooser(8, 8, 8, 8, 16, 0); // Alpha used for plane blending.
mSurfaceView.SetRenderer(this);
mSurfaceView.RenderMode = Rendermode.Continuously;
}