Heatmap for eye tracking representation

Almudena Palacios-Ibáñez

• February 07, 2022 18:09

Hello everyone,

Is there a way to display the eye tracking information as a heatmap using Unity for the HP omnicept reverb G2?

Thank you.

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  Sergi Tortosa

  • February 08, 2022 14:34

  Hello,

  Unfortunately, omnicept does not provide a built-in heatmap feature. If you are willing to use omnicept data to create a heatmap you can use the eye gaze data to ray cast to the different objects and use this data to build a heatmap.

  If you are doing raycast on unity for this it will look something like this: 

  if (Physics.Raycast(new Ray(camera.transform.position, camera.transform.rotation * new Vector3(eyeTracking.CombinedGaze.X * -1, eyeTracking.CombinedGaze.Y, 1)), out RaycastHit hit))
  {
      //Use here the hit info to save data to rebuild heatmap. 
  }

  Note that we are flipping the X-axis as the unity coordinate system is different from the eye tracker one. Also, we are using the camera position center as the origin of the ray, omnicept does provide a direction vector.

   

   

   

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