public void Update(ARFaceAnchor anchor)
{
if (!anchor.IsTracked || !RecordingEnabled || ScreenPPI == 0)
{
return;
}
// Render eye rays
eyeRNode.Transform = anchor.RightEyeTransform.ToSCNMatrix4();
eyeLNode.Transform = anchor.LeftEyeTransform.ToSCNMatrix4();
// Perform Hit test using the ray segments that are drawn by the center of the eyeballs
// to somewhere two meters away at direction of where users look at to the virtual plane that place
// at the same orientation of the phone screen
var phoneScreenEyeRHitTestResults = virtualPhoneNode.HitTest(lookAtTargetEyeRNode.WorldPosition,
eyeRNode.WorldPosition, hitTestOptions);
// HitTest with segment (virtualPhoneNode)
var phoneScreenEyeLHitTestResults = virtualPhoneNode.HitTest(lookAtTargetEyeLNode.WorldPosition,
eyeLNode.WorldPosition, hitTestOptions);
if (phoneScreenEyeLHitTestResults.Length > 0 && phoneScreenEyeRHitTestResults.Length > 0)
{
CGPoint coordinates = ScreenPositionFromHittest(phoneScreenEyeLHitTestResults[0], phoneScreenEyeRHitTestResults[0]);
// Update indicator position ? - SceneView.Superview.Frame.Width
DispatchQueue.MainQueue.DispatchAsync(() => {
//eyePositionIndicatorView.Center = coordinates;
eyePositionIndicatorView.Transform = CGAffineTransform.MakeTranslation(
coordinates.X,
coordinates.Y
);
//var distanceInCm = CalculateDistanceFromCamera();
});
// Calc eye screen position
//int screenX = (int)(coordinates.X * screenScale);
//int screenY = (int)(coordinates.Y * screenScale);
//System.Diagnostics.Debug.WriteLine($"Screen X: {screenX} - Y: {screenY}");
// Send sensor data
//MessagingCenter.Send<object, EyeGazeData>(this, "EyeSensorReading",
// new EyeGazeData(DateTime.Now, screenX, screenY, distanceInCm));
}
}