ABSTRACT
A motion interface is the means by which a user travels through a virtual environment (VE). Motion interfaces are categorized as active or passive (Durlach & Mavor, 1995). Active motion interfaces are defined as locomotion interfaces, which require self-propulsion by a user. Passive motion interfaces transport a user through the VE without significant user exertion. They are further subdivided as inertial motion interfaces, where the body is moved as in a flight simulator on a Stewart platform, and noninertial motion interfaces, where the body is stationary as in the use of a joystick.
