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Message-ID: <56141CCE.2030301@ecosensory.com>
Date: Tue, 06 Oct 2015 14:11:10 -0500
From: John Griessen <john AT ecosensory DOT com>
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To: geda-user AT delorie DOT com
Subject: Re: [geda-user] GTK3, Glade interface designer (router, auto?)
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Reply-To: geda-user AT delorie DOT com

On 10/06/2015 01:45 PM, Stefan Salewski wrote:
> toporouter idea is generally starting with a board
> with no traces, and doing a complete route.

It seems like automating the starting point handed off to the toporouter
is the least-effort path to using it incrementally in designs.

What if you selected a set of traces and footprints in PCB that were what you wanted to keep as is.
The automation needed is to generate a set of pins on footprints to route, and keep outs corresponding to the
existing stuff.  That is almost the same as starting with a new board of odd irregular shape except for the pins.

The new thing is "autoroute a subset of the pins on the footprints" rather than all that are in the full netlist.
Probably just needs a newly generated netlist from that selected set...