It uses ultrasound and the PS3 camera. Apparently the controllers can also determine how far they are appart from each other, and they're built in modules that can be recombined.
http://appft1.uspto.gov/netacgi/nph-...RS=20080261693
It uses ultrasound and the PS3 camera. Apparently the controllers can also determine how far they are appart from each other, and they're built in modules that can be recombined.
http://appft1.uspto.gov/netacgi/nph-...RS=20080261693