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.
When you do exercises intended to build muscle in your legs, lift weight that is between 75 and 85 percent of the maximum weight you could lift one time, called your one-rep maximum. The weight should feel extremely challenging by the last two to three repetitions in each set of six to 12 repetitions.