Re: gEDA-user: remove copper

[Peter Clifton <pcjc2@xxxxxxxxx>]

On Fri, 2008-11-07 at 01:01 +0000, Peter Clifton wrote:
> On Thu, 2008-11-06 at 11:12 -0500, DJ Delorie wrote:

> > PCB doesn't have a "negative copper" tool, if that's what you're
> > asking for.
> 
> I have a patch which adds that functionality (it mis-uses the "hole"
> flag to indicate that a polygon isn't drawn, and uses it to clear away
> other polygons... made vague sense to me at the time, its a "hole" in
> the polygon, but perhaps I ought to make a new flag if this feature were
> ever merged)

I over-loaded the "join" flag on polygons to set the behaviour as well.
Possibly an undesirable over-loading, but allowed me to prove the
concept without a lot of extra coding.

The patch is here:

http://repo.or.cz/w/geda-pcb/pcjc2.git?a=commitdiff;h=2bd2dcaec36093c1aa10cef62e2a96240dcbf346

-- 
Peter Clifton

Electrical Engineering Division,
Engineering Department,
University of Cambridge,
9, JJ Thomson Avenue,
Cambridge
CB3 0FA

Tel: +44 (0)7729 980173 - (No signal in the lab!)



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