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Date: Sat, 21 Jun 2014 19:42:08 +0200
From: Gabriel Paubert <paubert AT iram DOT es>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] pcb: Patch for arcs with different radii for x and y
 on screen
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On Sat, Jun 21, 2014 at 12:27:00PM -0400, DJ Delorie wrote:
> 
> > I "think" if gerber supports them, then getting arbitrary axis
> > directions will still be awkward / impossible without approximation.
> 
> Gerber doesn't support them.  At least, not reliably across fabs.  We
> approximate them with line segments.

Indeed, I've never used them, but the Gerber specification only describes
linear and circular interpolation. And the transformation which allow
non uniform scaling are also listed as deprecated.

	Gabriel