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Date: Tue, 10 Jul 2012 10:42:20 -0700
From: Andrew Poelstra <asp11 AT sfu DOT ca>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] [PATCH] Allow to create metric Gerber and drill
 files, hopefully final version.
Message-ID: <20120710174220.GA9111@malakian.lan>
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On Mon, Jul 09, 2012 at 06:46:22PM -0700, Andrew Poelstra wrote:
> On Tue, Jul 10, 2012 at 02:43:18AM +0200, Gabriel Paubert wrote:
> > 
> > Ok, it seems the bug is not actually a bug since octogonal pads
> > are procuded as polygons in Gerber output. I suspect that the
> > OCTOGONAL case in aperture definitions is dead code.
> >
> 
> This is my suspicion too. I'll investigate.
>

Yeah, it's dead. I have patch waiting in the wings to delete
it (and delete the #if 0'd stuff nearby). It's all been disabled
since forever, is probably bitrotten, and keeping old code around
is git's job now.
  
> > > 
> > > > 
> > > > The fact that imperial Gerber have 2 orders or magnitude better
> > > > resolution than the associated drill is a problem (25.4µm versus
> > > > 0.254µm). At least metric gives micrometer resolution for both. 
> > > >
> > > 
> > > Is this a problem with the spec, or our implementation?
> > 
> > Our implementation, for losing the last digit. This causes visible
> > centering problem in the smallest vias, and is a regression from
> > earlier revisions.
> >
> 
> Sigh.. the problem is that keeping the last digit causes overflows.
> We'll have to figure out a smarter solution.
>

This is a toughie. I may end up adding a pcb_printf specifier.

-- 
Andrew Poelstra
Email: asp11 at sfu.ca OR apoelstra at wpsoftware.net
Web:   http://www.wpsoftware.net/andrew
"You shouldn't trust every quote you read on the Internet." -- Socrates