What is FreeTrack?
http://en.wikipedia.org/wiki/FreeTrack
What does '2dof' and '6dof' mean?
2dof : Two degrees of freedom [Yaw, Pitch]
6dof : Six degrees of freedom [Yaw, Pitch, Roll, X, Y, Z], only available using 3 or 4 point tracking.
Yaw: Rotate left-right
Pitch: Rotate up-down
Roll: Tilt left-right
X: Move left-right
Y: Move up-down
Z: Move forward-back
A 'degree of freedom' describes an axis about which motion can be tracked.
Why can't I get full 6dof in <insert game name here>?
Not all head tracking enabled games support 6dof.
http://en.wikipedia.org/wiki/List_of_games_supporting_FreeTrack
In Flight Simulator 2004, when using the FSUIPC interface, zooming is not smooth, changing in large discrete steps.
This is a limitation of the zooming system in Flight Simulator 2004 and is most noticeable when zoomed out.
