[PD] Installation with GEM

B. Bogart ben at ekran.org
Sun Apr 24 21:53:23 CEST 2005

Note that Gem is very strong when it comes to putting video on openGL
objects and moving them in space and such, the strength is in vector
operations, scaling rotating stretching lighting etc..

Pixel processing, which sounds like what your aiming for, is probably
better suited to PDP/PiDiP and/or gridflow.

That being said there are some pix_ objects to buffer pixes, but I've
not really used them personally.


Florian Grond wrote:
> Dear List,
> I would like to realize an installation in GEM but I don't know if there
> are appropriate objects or If I have to teach myself how to program them.
> If you could give me advise which direction to go I would be very pleased.
> Two cameras would send their frames to two image stacks which contain
> say 30 frames (the more the better).
> The actual frame is subtracted from the last one and the resulting frame
> of this simple kind of movement-dedection would serve as a parameter to
> compose from the two stacks the actual video output reading each single
> pixel in a random manner from the two stacks mixing both by using an
> appropriate function.
> Does anyone have an idea how to realize that with existing objects, and
> if not, where do I find good documentation to learn how to program GEM.
> Thanks a lot,
> Florian
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