hello,
what about converting cartesian to polar coordinates instead?
with something like
angle = atan(y/x)
you can even get the distance from the center with
R = Sqrt(x2 + y2)
that should be a lot easier
----- Mail original -----
De: "James Dunn" james@4thharmonic.com À: "pd-list" pd-list@iem.at Envoyé: Dimanche 6 Janvier 2013 22:28:30 Objet: [PD] Circular scrolling in pd
Hi,
I'm trying to implement circular scrolling with the trackpad in pd and am approaching it by dividing a circle into segments and trying to detect when the mouses moves from one segment to the other. At the moment I can only detect 4 segments (basically just the zero crossings) which is not really accurate enough.
How would I go about detecting the boundaries of the 12 segments in the attached patch (circscroll.pd)?
Eventually I want to detect speed and direction too - but perhaps there is a better approach?
any advice welcome.
thanks,
james
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