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Date:	Thu, 11 Oct 2012 14:38:19 -0400
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From:	DJ Delorie <dj AT delorie DOT com>
To:	geda-user AT delorie DOT com
In-reply-to:	<20121011182651.25438.qmail@stuge.se> (message from Peter Stuge
	on Thu, 11 Oct 2012 20:26:51 +0200)
Subject:	Re: [geda-user] Flex?
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IIRC, it was something like this:

The arc thickness is the same as the trace thickness.  It starts with
the outside arc, and if it thinks there will be a "hole" left over,
adds more.

The math for the outside arc was done with paper and pencil first,
using circles and triangles to picture everything.

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