FREETRACK
Freetrack uses a webcam and markers to detect the player's head movement in order to reproduce those movement in a game.
The principle is similar to the famous TrackIRand to the other software implementation as Freelookand Cam2Pan.
Camera with a passe IR filter | 4 IR leds, 4 resistances, a pack battery pack |
Here is the screen at runtime.
But Freetack also support 6DOF:
Aces High 2
Live For Speed
New Freetrack webpage Thanks to Didja