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.
Do this 8 to12 times with each leg. To build your calf muscles, lift a barbell and hold it against your thighs, or hold a dumbbell in each hand with your arms hanging straight down at your sides. Lift your heels off the floor 8 to 12 times. Increase the weight of the barbell or dumbbell as you get stronger.