On Jul 12, 2008, at 8:25 AM, Luigi Rensinghoff wrote:

Hi dear List

I have a question regarding my Wiimote-OSC experiments.

The wiimote data gets into PD via OSC, either through OSculator or through a linuxbox running the wiimote external.

So i have problems computing really really fast movements from the wiimote and i would like to ask if somebody knows about the speed of messages, be it in OSC, PD or Osculator


1) What do you think is a reasonable message-rate for fast motion-data ? I have the impression i need to slow down the data (with speedlim, pipe or resample) to be able to process it     
     properly - any experience with that or recommendations ?

Pd can handle all of the data that the wiiremote sends, that is not a problem, unless you are on a machine that is 300MHz or less, then it might start to be too much.

2) What would you consider the bottleneck ?

Probably in the transmission rate and polling rate of bluetooth.

3) Could it be an advantage to transform incoming OSC-messages into a signal ? instead of dealing with floats ?

I doubt it.

The idea behind it is to combine x-y IR Data from the wii with the accelleration data (Mapping accelleration to velocity, but catch the note from the IR-Position)

Did anybody find a good solution for that ?

I'll bet there is code that does that already, but probably not in Pd.  For example, in one of Johnny Chung Lee's projects.  You could either grab some C code and make an external, or translate the code into Pd.

http://www.cs.cmu.edu/~johnny/projects/wii/

.hc


Thanks

Luigi



>---------------------------------------<

Luigi Rensinghoff




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