I am finally getting back into visuals and I am just getting my feet wet with GEM. I used to use visual jockey gold, which is really great for freeware but man that thing was a pain in the tukus sometimes! All kind of stupid glitches and menu options that weren't controllable by MIDI. GEM on linux is the way to go for me.
I'm trying to get an old algorithm to work on gem that involves video feedback. Basically I start off with some video to initiate the loop, then I chromakey the video, apply filters/ color effects/ zoom rotation etc to the output and feed it back into the background of the chroma-keyed image. This makes it so that cutout portions of the video that I am playing go crazy with rainbow color goopy nonsense. Here's an example:
(notice the video staggering and crappy resolution due to vj gold :/ )
So far I have found this page ( http://www.hellocatfood.com/feedback-loops-in-pure-data/ ) which details using the pix_snap object to capture the entire render window and spit it into a texture. That works fine except that in this example the texture is being applied to a 3D object and I just want to use it for a plane, at least to start off with.
I am having some difficulty getting this method to work just printing to a single plane. Before I go shooting in the dark on how to fix it has anyone else figured out how to do this already/ have some resources for me to find? Google shows me a lot of people who have done it but very few who share their code.