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Date: Sun, 13 Sep 2015 19:19:11 -0400
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From: DJ Delorie <dj AT delorie DOT com>
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	John Doty on Sun, 13 Sep 2015 17:14:04 -0600)
Subject: Re: [geda-user] Apollon
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> It is if (x, y, h) is a Pythagorean triple. By
> definition. https://en.wikipedia.org/wiki/Pythagorean_triple

Well, OK, but (1) they're rare and/or hard to find for a given angle,
and (2) you still have to divide by H to normalize a rotation, which
gives you a floating point imprecision.