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Date: Wed, 23 Apr 2014 12:02:26 -0700
From: Andrew Poelstra <apoelstra AT wpsoftware DOT net>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] again about pcb file format
Message-ID: <20140423190226.GH6660@shavo.dd-wrt>
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On Wed, Apr 23, 2014 at 06:40:04PM +0200, Filippo Micheletti wrote:
> Hi there,
> I just upgraded my gEDA suite and now I have the pcb version 20140316 whe=
re
> I noticed a change in file format, now all distance values are followed by
> the unit (mil or mm) but I cannot understand the behavior of pcb... in fa=
ct
> opening an old format file (without units), making some changes and saving
> it, all is saved in the new format (with units) but something is saved in
> mils and something in mm... why? Is this a random choice?=20

As DJ says, pcb tries to figure out what the user's unit setting was by
considering whether mm or mils gives a rounder number. If you have a
metric pcb which was saved in the old cmils format, all the measurements
will have rounding errors, which screws up this algorithm, resulting in
the "random" suffixes.

Locally I run a patched pcb which always outputs mm to work around this.
I guess there should be a UI option for this.

--=20
Andrew Poelstra
Mathematics Department, University of Texas at Austin
Email: apoelstra at wpsoftware.net
Web:   http://www.wpsoftware.net/andrew

"If they had taught a class on how to be the kind of citizen Dick Cheney
 worries about, I would have finished high school."   --Edward Snowden


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