i just invented the cell phone hud!

Its a massively sophisticated piece of equipment :-)
A simple sheet of transparent material reflects whatever is being shown on the screen up into the users field of view just like in a hand bearing compass or the heads up display in a plane.

I got the idea after making a holoprojector like the ones in this video.   There are several videos on you tube showing how to make one from a CD case.

I made a simple ghost sample app in about 20 minutes in Unity.  It uses the compass to navigate in the world and see creepy creatures :-)

How well it works is highly dependent on the contrast in the image and the ambient light levels which make it quite hard to photograph too.

Well, its a conversation starter for the upcoming SVVR meetup this week if nothing else :-)

Now, Who ya gonna call?

Sample Code:

//This script attached to the camera lets you rotate it around the Y axis.


using UnityEngine;
using System.Collections;

public class mems : MonoBehaviour 
{
   // Use this for initialization
  void Start ()
  {
       Input.compass.enabled = true;
       Input.location.Start();
      Screen.sleepTimeout = (int)SleepTimeout.NeverSleep;
   }

   void OnGUI()
   {
      transform.rotation = Quaternion.Slerp(transform.rotation,       Quaternion.Euler(0,Input.compass.magneticHeading, 0),Time.deltaTime*2);
   }

}