title: Is it possible to determine user gaze in ARCore / Sceneform (Augmented Reality) without using Unity?
body: <p>I can create a gazePointer in ARCore using Unity (as shown in: <a href="https://codelabs.developers.google.com/codelabs/arcore-intro/#10" rel="nofollow noreferrer">https://codelabs.developers.google.com/codelabs/arcore-intro/#10</a>), but is it possible to do the same without Unity (just using ARCore / Sceneform)?</p>
  
  <p>The functionality I need to replicate in augmented reality is to detect the user's gaze on a predefined 2D reference image, and if the gaze is more than (say) 5 seconds, then a particular action should be implemented. We can assume that the "gaze" is at the absolute center of the user's view.</p>
  
  <p>Note: I'm planning to do this in stereoscopic mode of a headset like Google Cardboard (i.e. with the phone camera uncovered).</p>