As a user's head moves, turns or tilts in a virtual environment, the computer-generated images he sees must continually update accordingly with no noticeable lag, jitter or distortion. if a user employs a wand to interact with the environment, the computer must interact in real time with the movements and spatial orientation of the wand as well.

　　Accurate tracking of the user's movements and subsequent feedback to the computer are integral components of a succesful interaction between the user and the computer .

　　The technology or combination if technologies chosen for interaction will determine its efficiency in a given application. Barco has accumulated considerable experience with the various interactive devices and tracking technologies and can insure a superior performance and a "seamless" integration of the tracking system into a given interactive display system.

　　For the accurate and efficient callibration of ultrasonic tracking devices, Barco has developed its "i-Wizard" software. In combination with integrated marking hardware, this software isused to configure the position and orientation of each transmitter . For reconfigurable systems such as the Barco MoVE™ different setups can be activated by a single button click. The software is available on UNIX as well as on Windows platforms.