 This allows users to take precise, measured steps when moving around obstacles or cover, and to continuously vary their speed over a realistic range of walking, running and crawling gaits.The up-down movement of the pedals is mapped to control the avatar's postural height via the flexing of the avatar's legs.This allows the avatar to continuously transition from standing tall to a low crouch (or kneel when the legs are apart), and when prone from hands-and-knees to belly-on-the-ground.