hey lostclimate, that is an awsome idea smile
Two or three leds on some kind of a sword and it should already work pretty nice with my point detection wink the alternative would be using the wiimotes accelerators :P or probably a combination of both.

Lite-C Tut. 1 Lite-C Tut. 2 Lite-C Tut. 3 (en)
Shader Tutorial (ger)

http://www.slindev.com