Answer Wiki. The system would be cued off the pilot's helmet, so it will definitely look where your head is pointing, not your eyes specifically (that would be a gaze-tracking system, which AFAIK hasn't yet been used for this kind of application).
Exercise to Gain Leg Weight. Although you can't make your body gain weight in your legs, you can perform exercises that encourage the growth of leg muscle. Squats, lunges and step-ups are examples of such moves that target the legs and recruit a lot of muscle fibers for growth.
Even though I'm 15% bfat right now, I can see my abs sticking out from under my fat. So, do heavy weighted exercises while bulking to develop your abs. 12/1/12 - 120 lbs ~12% first bulk, only upper body. 5/15/13 - 145 lbs ~16% First cut. 8/1/13 - 130 lbs ~8% Second bulk. Started training legs.