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.
Diet is the most important factor when it comes to losing weight, but is often overlooked. To lose weight from your legs and calves, you need to consume fewer calories than you burn on a daily basis. The USDA recommends that women consume 1800 to 2400 calories per day, and men consume 2000 to 3000 calories. Start in the middle of these figures, and adjust your intake in accordance with progress.