[Fluxus] wire-opacity

[gabor papp]

usually i use transparent lines a lot when working with generative
graphics. unfortunately, i haven't been able to do it in fluxus. as i
noticed opacity works only for polygons.

i'm sending a small patch that implements the wire-opacity function, and
a short scheme test code that generates something like this:
http://fluxus.mndl.hu/wire-opacity-test.png

i would love to hear your opinion about it.

gabor


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