The effect is actually in texture-land not vector land.
So I copy the buffer pix_snap2tex, and then rotate the copy slightly, which gets copied in the next frame and so on. Like video feedback.
The idea came from Erich Berger to whom I am very grateful.
The good thing is that you can many iterations even if your graphics card is not great at repeating Geos. Actually self-similar is a little fancy because I'm using three copies of the feedback, and using pix_snap (not snap2tex) because the areas of the texture that only contain the background colour of the window are transparent. So one feedback surface can feedback onto a second.
Last time I heard there was some work on the idea of sharing display-lists in Gem so that multiple instances of the same object could be a little faster. Any status report on this?
b>
Thoralf Schulze wrote:
Hi,
off topic: ben: i was checking this out http://www.ekran.org/ben/self-similar/index.html
and wondered if you might share a very simple example patch on doing self-similar stuff?
judging from the pictures, I suppose that ben repeated geos with slight changes to their rotateXYZ / translateXYZ parameters. Something like this: http://lists.puredata.info/pipermail/pd-list/2004-09/022550.html , only in 3d.
hope this helps, thoralf.
How much free photo storage do you get? Store your holiday snaps for FREE with Yahoo! Photos http://uk.photos.yahoo.com
PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list