On their screens the two players see a virtual tennis court
superimposed on a marker. The mobile phones act as virtual rackets and
are used to hit the ball back and forth between the players. A custom port of ARToolKit to Symbian was created in order to be able to
track the two phones relative to a common marker. In this marker space the ball simulation is ran that is synchronized via Bluetooth. The
tracking allows to check if the virtual ball volume intersects with
the racket volume defined as a cylinder around the camera view axis.
Fotos © NVIS