X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f
Date: Sun, 27 Nov 2011 17:03:48 -0500
Message-Id: <201111272203.pARM3msH003146@envy.delorie.com>
From: DJ Delorie <dj AT delorie DOT com>
To: geda-user AT delorie DOT com
In-reply-to:
	<f939dc32b1872b74667a44388d598707 DOT squirrel AT ssl-webmail-vh DOT nl DOT clara DOT net>
	(myken AT iae DOT nl)
Subject: Re: [geda-user] Mathematics of the arc element in pcb.
References: <f939dc32b1872b74667a44388d598707 DOT squirrel AT ssl-webmail-vh DOT nl DOT clara DOT net>
Reply-To: geda-user AT delorie DOT com


AFAIR, the start and delta angles are applied *before* the width and
height, so what you end up with is a stretched arc, not a clipped
ellipse.  In other words, a 45 degree arc drawn inside a rectangle,
will end on the diagonal of the rectangle.

Drawing arcs is managed by the individual hids, like hid/gtk/ or hid/ps/