Head tracking for Spring is here! Try it :)

[Masure]

I did minor changes to headtrack.lua

Your head doesn't give the cam pos anymore but a speed vector to move the cam.
A deadzone definition to avoid vectors smaller than 10 on x axis and 5 on y axis. If your head doesn't move enough, you don't have small annoying moves.
Your head "zero" is taken at script load, reload, stop/go.

http://vmasure.free.fr/spring/Headtrack2.lua