hi,
what you're talking about sounds an aweful lot like GEM. GEM is an image/video/openGL external for PD that works in a chain structure to allow for the manipulation of whatever the input may be. it also does full openGL 3D rendering in real time.
matt..
----- Original Message ----- From: "Riccardo Trocca" rtrocca@libero.it To: pd-dev@iem.kug.ac.at Sent: Sunday, September 29, 2002 5:05 AM Subject: [PD-dev] Hello
Hello, I'm almost a newbye to Pure-Data even if I had some experience with MAX/MSP. I've got experience in building systems for real-time processing of video (live or movies) in order to generate data for music/sound synthesis. I'm looking at writing PD externals to do that. I'd like to know if it is possible (and how) to add a new datatype to PD, ore, some advice on how to implement my ideas. Reading the documentation I've seen that there are very few datatypes: number, symbol, pointer and audio buffers. Given that I'm just beginning to tackle the problem may be I'm asking some FAQ, anyway... I can't understand what is the pointer datatype. A symbol seems to be "just" a string. Can I add a value a pointer to a data structure? It is possible to build something as audio buffers (image data type, or multidimensional array)? Does that require modifications to PD? The system I'm working on, allows to create a chain of processing on images, then when the system begins to run there is an init phase where each element of the processing chain is told what kind of images it will receive, it initializes itself and its internal buffers, and then starts working everytime it receives data. I think that it is more or less what happens with the audio chain in PD. Framestein has a different approach given what I've seen. Something similar seems to be GridFlow, but I'm having a hard time trying to understand its inner workings. Well if somebody can give me some pointer to start think about... thanks Riccardo Trocca
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