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	Tue, 01 Dec 2015 05:12:09 -0800 (PST)
Date:	Tue, 1 Dec 2015 14:12:03 +0100
From:	"Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] PCB: clearouts in polygons slightly off, fix? Also
	clearance
Message-Id:	<20151201141203.8718b21c9e3e9b37d0b07472@gmail.com>
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It might be related, I found clearance is correct then using default values but then clearance is changed it is wrong. I do not remeber the details right now. I have been busy using gEDA for weeks and did not yet have time to spend any time looking at code.

Regards Nicklas Karlsson


On Tue, 1 Dec 2015 13:48:43 +0100
Martin Beranek <martin AT mb5 DOT cz> wrote:

> Hi all,
> 
> I have noticed that the code cutting holes/clearance into polygons
> around traces and pads (that is code in polygon.c) creates contours
> which are a little off.
> 
> For example long straight edges of the clearout around square pad are
> not exactly parallel with the pad edges because round corners are
> generated without last vertex. There is few similar issues in the code.
> (You can see this, without reading the code, by zooming in to the edge
> of the small pad's clearout, preferably with the finest grid setting).
> 
> I am considering to fix it, at least for my personal use, but I guess it
> should be fixed in the project too. But ... fixing this issue causes
> existing PCB files to be rendered slightly different (more correct in
> fact, but, nonetheless, different compared to the current situation).
> The differences are minor, but existing and one can imagine that there
> is chance that they can trigger new DRC error for example.
> 
> What is the project's opinion on this? Do you want the fix? Should one
> worry about backward compatibility in this case? If so, then how?
> 
> Martin

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