For hands-free, voice free, pointer direction the best approach IMO is to develop an eye tracking solution. This would require a camera or low power laser within the hmd that would follow the movement of the eye. I've also seen experimental implementations of this that use a contact lense containing a thin wire in its periphery to aide in tracking. I also remember seeing something in the movie "Blue Thunder" about how the comanche helicopters have an eye tracking system in the helmet so the pilot just has to look at something to target it. Regarding the electrical signal transmission over the body- There was a special on Scientific American Frontiers about the future of computing and they had some guy on that was developing a computer for your shoe that would transmit and recieve data using a weak electrical signal transmitted through the body (exchange business cards by shaking hands). -- Bill Nordstrom University of Texas Southwestern Medical Center 5323 Harry Hines Blvd. Dallas, TX 75235-9039 W:214-648-9227 Fax: 214-648-8694 emailCooltalk: 129.112.20.190
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