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Date: Tue, 22 Jul 2014 10:27:20 -0700
From: Dave Curtis <davecurtis AT sonic DOT net>
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Subject: Re: [geda-user] Octagon flag on Pad[]
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Reply-To: geda-user AT delorie DOT com

On 07/22/2014 08:50 AM, DJ Delorie wrote:
> http://www.bourns.com/data/global/pdfs/SRR6038.pdf
>

Start with this example of a round-cornered rectangle, copy/pasted from 
the RS-274X spec:

%AMRECTROUNDCORNERS*
0 Rectangle with rounded corners. *
0 Offsets $4 and $5 are interpreted as the *
0 offset of the flash origin from the pad center. *
0 First create horizontal rectangle. *
21,1,$1,$2-$3-$3,0-$4,0-$5,0*
90
Copyright Ucamco NV.
0 From now on, use width and height half-sizes. *
$9=$1/2*
$8=$2/2*
0 Add top and bottom rectangles. *
22,1,$1-$3-$3,$3,0-$9+$3-$4,$8-$3-$5,0*
22,1,$1-$3-$3,$3,0-$9+$3-$4,0-$8-$5,0*
0 Add circles at the corners. *
1,1,$3+$3,0-$4+$9-$3,0-$5+$8-$3*
1,1,$3+$3,0-$4-$9+$3,0-$5+$8-$3*
1,1,$3+$3,0-$4-$9+$3,0-$5-$8+$3*
1,1,$3+$3,0-$4+$9-$3,0-$5-$8+$3*%

Then add a primitive circle with exposure "off" to erase the circle, and 
another primitive rectangle with exposure "off" to erase the rest of the 
gap. Done.  That flashes the whole footprint in one go.

Or, you could create a macro for just one of the pads by doing a base 
rectangle, a filler rectangle at the top, two circles for the round 
corners, and one circle with exposure "off".  Then use that pad twice to 
create the part footprint.  Overall, this would be a simpler macro.