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Date: Wed, 16 Nov 2011 09:43:20 -0800
From: Andrew Poelstra <asp11 AT sfu DOT ca>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] Working with a 0.1mm grid
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On Wed, Oct 26, 2011 at 11:01:41AM -0700, Andrew Poelstra wrote:
> On Tue, Oct 25, 2011 at 02:48:46PM +0200, Gabriel Paubert wrote:
> > On Tue, Oct 25, 2011 at 08:24:46AM -0400, DJ Delorie wrote:
> > > 
> > > Might be related to the new "snap to line intersections" feature.
> > 
> > Oops, I was wrong on the date. I had pulled early September but not
> > compiled on my laptop, so make it May 19th (and I don't know how
> > to obtain the git commit id).
> > 
> > By the way, when loading on my laptop a file recently created file on my
> > desktop, I get a syntax error on line 8. Which reads:
> > 
> > Grid[0.1mm 0.0000 0.0000 1]
> > 
> > I believed backward compatibilty went further back in time...
> >
> 
> Crap. When I checked the code, I made sure that Grid[] read the first
> argument as a NUMBER. But actually, it only does so for the very old
> syntax of Grid[].
> 
> So, I guess we'll need to put an exception in the code when outputting
> the grid. And of course, that will re-introduce the rounding error...
> grrr.
>

I think the best solution will be to save the grid in cmils, as before,
and add an Attribute("PCB::grid::size") that overrides it in new versions
of pcb for higher precision.

This way we will not have to bump the file format version. 

-- 
Andrew Poelstra
Email: asp11 at sfu.ca OR apoelstra at wpsoftware.net
Web:   http://www.wpsoftware.net/andrew
"I don't understand. Are you saying dualism is always good, or always bad?"