[cairo] Obtaining two parallel paths from a single curve

John Ellson ellson at research.att.com
Tue Jul 29 06:10:00 PDT 2008

archee at 126 wrote:
> Hi,
> How to obtain two parallel paths from a single curve?
> Say, these two parallel paths are N pixels away from each other.
> Thanks!
Perhaps a dumb idea, with all these math wiz's around describing
envelopes of circles....,
but couldn't you just draw a wide line in the color of your parallel
lines, then draw another
slightly narrower wide line with the same coordinates in the color for
the road, leaving just parallel borders?


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