[PD] Somewhat nice circles using data structures with anti-aliasing implementing Xiaolin Wu circle algorithm (vanilla)

Alexandre Torres Porres porres at gmail.com
Mon Dec 2 00:29:14 CET 2019

I didn't implement a [knob], it's a two dimensional slider but the
boundaries are a circle, anyway, still working on it.

I feel like implementing knob also and it'd be cool if I could implement a
grid of knobs to control a routing matrix, but then I think it'd be way too
heavy and impractical, so the best option would be to just have a way to
draw circles in Data Structures with a dedicated object.

I see Purr Data has a [draw] object that draws circles and stuff, but it's
a whole different GUI language that we can't use, but we could use one for

It's out of my league, but I hope someone else could propose the inclusion
of such object.


Em dom., 1 de dez. de 2019 às 12:55, oliver <oliver at klingt.org> escreveu:

> Alexandre Torres Porres wrote:
> > Thanks very much for this, just used it to make a two dimensional
> > circular slider!
> did you include an extra dot for position reference in this ? would you
> mind posting your knob ?
> and yes: this is actually a very nice and beautiful circle rendering.
> but i also share alex' concern that it might be too "heavy" on PD's
> memory or the GUI if several of these knobs are present in a patch.
> can somebody give a brief prediction whether this is a practicable
> approach in a patch with let's say 50 knobs like this ?
> best
> oliver
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