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Date:	Thu, 26 Jul 2012 23:46:52 -0400
From:	Phil Taylor <phil AT plastitar DOT com>
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To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] Odd Shape Board Outline - HOW?
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On 7/25/2012 11:04 PM, Edward Comer wrote:
> All of my previous boards have been rectangles. Now, I have an odd board
> outline - a 60mm circle with a 16.5mm hole in the center. I can
> accomplish using the ARC tool on my outline layer. However, this board
> needs a 4.5mm x 2.25mm notch in the inner hole - looking a little like a
> doughnut with a fat keyhole in the middle. My fab house says that they
> can make it if I can draw it on the outline layer.

I will often write out the outline-layer for a board using a text 
editor.  I then manually paste it into the .pcb file.  When you open it 
in PCB it's right there.

If it's an exceeding complex outline, you may want to use some kind of 
CAD program to get the coordinates for your lines.  Most of the PCBs 
I've done (including some elliptical boards, and several including 
curved/round edges) have been drawn on a sheet of paper and typed in 
using gedit.

You will do a little bit of math to get the intersection of your arcs 
and your lines, but by doing it by hand assures that the endpoints will 
be coincident.

It's not elegant, but it is deterministic.

Phil

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