i3D is a new app that can create a glasses-free 3D display on iDevices, using a technology known as Head-Coupled Perspective (HCP). Developed by the folks from the Engineering Human-Computer Interaction (EHCI) Research Group, HCP uses a front facing camera to track the movements of a user's head, allowing the app to adjust the display accordingly. The result is a monocular 3D screen that creates the illusion of looking into a box. If the concept sounds a little familiar, it could be because Google unveiled a similar headtracking feature for Ice Cream Sandwich during the opening keynote at this month's
