TrackIR Interface With Games
The proprietary TrackIR interface has become the de facto standard for view control in PC games and simulations and is only intended for use with TrackIR products. As NaturalPoint convinced more developers and games to support it, other devices inspired by the TrackIR have sought to access the same view control and been successful in reverse engineering the interface. This has allowed non-TrackIR devices to be used for view control, including common video devices like webcams.
Early on NaturalPoint updated the interface to require validation using text strings copyrighted by NaturalPoint, and only granted permission for use of the strings to game and simulation developers. This meant other applications wishing to use the interface without approval from NaturalPoint would have to risk potentially violating NaturalPoint's copyright. Proponents of third party head tracking devices which rely on the TrackIR interface for support in many titles believe the text strings are exempt and fall under fair use for the purposes of interoperability.
In October 2008 NaturalPoint changed the TrackIR interface and began encrypting the data stream sent to some new titles. Third party devices which had reverse-engineered the previous TrackIR interface were rendered incompatible with these new game titles due to the encryption. The older TrackIR-1 and TrackIR-2 products that use software drivers which are no longer maintained are also incompatible with titles using the new encrypted interface.
Some larger gaming and simulation titles still do not support the TrackIR interface natively, such as Microsoft Flight Simulator X. Microsoft Flight Simulator X requires the TrackIR to send view control data to it using Microsoft's own SimConnect interface. Eagle Dynamics, developer of DCS: Black Shark and other popular Flight Simulation titles, implemented an alternative view control interface alongside the TrackIR interface but limited it to supporting 3DOF at NaturalPoint's request.
Read more about this topic: Track IR
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