[PD] [Gem][pix_threshold]

patko colet.patrice at free.fr
Mon Jun 7 16:24:48 CEST 2010

 I've attached a patch that is supposed to render a particle system on a black background 
where all snaped white pixels should be turned progressively to alpha value following their luminance value,
with the help of [biquad] object.
 Sometimes it works, sometimes it doesn't, I couldn't figure out why.

 So I've attached a patch where we can see what I'm trying to achieve,
what am I doing wrong?

Patrice Colet
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