[PD] wiimote with ir sensor bar

Chris McCormick chris at mccormick.cx
Mon Oct 29 12:12:16 CET 2007


Well maybe you could fill a room with ir LEDs so that the Wiimote
always has some LEDs in it's view, and then make each LED flash with
a unique pattern. That way you could read the pattern being flashed by
each LED to know which LED(s) the Wiimote is pointing at, and determine
it's position in space from the positions of the LEDs in it's view.



On Sun, Oct 28, 2007 at 08:36:42PM +0100, Roman Haefeli wrote:
> On Sun, 2007-10-28 at 01:12 -0700, punchik punchik wrote:
> > Hi , is there any way of using the ir sensor bar with
> > the wimote in pure data?
> yes, that is possible. the sensor bar is nothing else but two groups of
> ir-leds, that are used as a reference point in space. you couls also use
> a lighter (or up to four) instead. the wiimote just sends you the
> coordinates of the reference points' (ir-led, lighter, whatever)
> projection on the wiimote's intenal ir-camera.  
> >  Is it posible to track the
> > movements of people carrying wimotes in real space
> > with puredata?
> no, that is not quite possible with the sensors, that wiimote is
> equipped with. it has 3 accelerometers (x, y and z), but it is very
> difficult (probably impossible) to calculate a position out of this
> data. it would be possible to calculate the position with the data from
> the ir-camera, but then you would need at least 3 reference points and
> they would have to be always visible for the cam. since the angle is
> quite narrow, it is probably not too suitable for position tracking. 
> roman
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