The third travel technique involved a 3-DOF joystick as the input
device (Fig. 5). A lateral tilt of the joystick resulted in a lateral
displacement of the viewpoint (strafe motion) while forward/backward
joystick tilt produce a fore/aft movement of the viewpoint.
Finally, a twist of the joystick’s handle rotated the viewpoint on
the horizontal plane, around the vertical axis (yaw). Translation
speed was controlled through a linear function gain up to a maximum
speed of 5 m/s. Rotational speed was a constant 180/s.