US Patent 11175732 Virtual reality apparatus

An apparatus for virtual reality simulation includes a first base part and a second base part arranged to rotate relative to each other about a common axis. The apparatus also includes means for determining an angle between the first base part and the second base part. The second base part may be provided with a chair on which a user of the apparatus may sit during use of the apparatus. The means for determining an angle between the first base part and the second base part enables the apparatus to determine the direction in which the user is facing, relative to the first base part, after relative movement of the first base part and the second base part.