FaceTrackNoIR is a head tracker compatible with the TrackIR protocol. There was a
thread about it here a while ago.
I finally got myself a web cam (Logitech C500 from the
compatibility list) and spent ~2h setting it up for RoF. I've been using TrackIR 4 with RoF previously, so I can compare the two systems directly.
TIR works more or less out of the box. With FaceTrackNoIR I had to configure all axis (it offers 6 DOF!) individually until I got satisfactory head movement in cockpit. Some even needed to be inverted. Tracking is a bit slower than with TIR, but I'm sure that can be improved either by digging deeper into config options or over time when updates for FaceTrackNoIR emerge. But the bottom line is:
It works!To me this was a revelation. I can get head tracking on par with TIR from OpenSource software and a simple web cam below 30€! The best part is that I don't need any reflectors or LEDs. The extra equipment always bothered me.
So I encourage all of you to give it a shot wether you own a TrackIR or FreeTrack or not.