Wiimote Project

General Wiimote and Technology => Project Ideas => Topic started by: inio on February 14, 2008, 03:36:14 PM

Title: Point IDs
Post by: inio on February 14, 2008, 03:36:14 PM
This came up at Johnny's talk yesterday:

identifying tracked points would be really useful.  Encoding id's through time-domain modulation is the obvious way to do this.  That is, have each point somehow send out a unique string of 1s and 0s that identify it.  The questions then become:
1. What code to use to minimize bits-to-ID (code theory question, there's probably an EASY answer somewhere)
2. What bit rate to send the code at to minimize time-to-ID (trivial engineering question)
3. Is is possible to continuously track the modulated point (tricky question)

Obviously the answer to 3 is no if you're turning it off entirely.  However, using the "full" output mod (doc'd on wiibrew now - sorry, thought I wrote it up long ago) you can get 8 bits of intensity data. This should be enough to allow dimming the point a bit (likely via PWM at a fairly high frequency) to differentiate 1s and 0s.
Title: Re: Point IDs
Post by: JDuzio on May 04, 2008, 11:12:58 AM
ohh.. ya this idea is helpful for any ideas that combine two interfaces, like the VR and Hands on programs for modeling or CAD.