As long as the user’s hand or finger stays within this box, it is guaranteed to remain in the Leap Motion field of view. You can use this guarantee in your application by mapping the interaction area of your application to the area defined by the InteractionBox instead of mapping to the entire Leap Motion field of view. The InteractionBox class provides the NormalizePoint() method to help map Leap Motion coordinates to your application coordinates (by first normalizing them to the range [0..1]).