// Do a raycast into the world based on the user's
// head position and orientation.
var headPosition = Camera.main.transform.position;
var gazeDirection = Camera.main.transform.forward;

RaycastHit hitInfo;
Ray ray;
Camera c = Camera.main;

ray = c.ScreenPointToRay(headPosition);

if (Physics.Raycast(headPosition, gazeDirection, out hitInfo))
{


    // If the raycast hit a hologram...
        objHit = hitInfo.transform;

    // Move the cursor to the point where the raycast hit.
        this.transform.position = hitInfo.point;

    // Rotate the cursor to hug the surface of the hologram.
        this.transform.rotation = Quaternion.FromToRotation(Vector3.up, hitInfo.normal);
}