[PD] Free rotation in GEM

B. Bogart ben at ekran.org
Thu Jul 17 01:15:45 CEST 2008

I suppose we'll here from David...

I do certainly not quite understand what he is aiming to do.

As for the heart of the question:

"...I have come across concepts such as multiplying matrixs and
converting a matrix to 'quarternion', 'gimbal lock'."

Does not sound like he is explicitly trying to avoid "gimbal lock" to me. ;)


Mathieu Bouchard wrote:
> On Wed, 16 Jul 2008, B. Bogart wrote:
>> If you are just wanting to rotate many times, using huge numbers then
>> tricks like: wrap 0 359 work well...
> Depends how huge they are. Pick 1000000032. That should give 312
> degrees, supposing you use [wrap 0 360] instead of [wrap 0 359]. But as
> a pd float, it gives either 280 or 344 depending on how the rounding
> happens.
> But this [wrap] trick is definitely not something that one can consider
> using if one is concerned with gimbal lock, and pspunch said he wants to
> avoid gimbal lock, so I don't know why you even mention it, if you want
> so much to stick to the "heart of the question".
>  _ _ __ ___ _____ ________ _____________ _____________________ ...
> | Mathieu Bouchard - tél:+1.514.383.3801, Montréal, Québec

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