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	Sun, 04 Oct 2015 10:17:22 -0700 (PDT)
Date:	Sun, 4 Oct 2015 19:17:17 +0200
From:	"Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] GTK3, Glade interface designer (router, auto?)
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"The code is easy, short, and mostly based on that PhD thesis." If it is based on PhD thesis it probably have a very good theoretical base, can you bring some light ont this?

The only thing I have against curved traces is the extra time needed tom make tghem.

Nicklas Karlsson


> On Sat, 2015-10-03 at 15:16 -0800, Britton Kerin
> (britton DOT kerin AT gmail DOT com) [via geda-user AT delorie DOT com] wrote:
> > How is your work on the topo router coming?  I have a good blob of
> > free time
> > coming soon and I'm planning to spend it on router.
> > 
> > It looks like your router does the layer part, and what's left is the
> > the
> > interlayer
> > stuff?  Are there still crashers in the intra-layer part?
> 
> I have worked only in 2013 on that router. Was much fun and I was
> impressed by the results. But there was nearly no interest by others, I
> think here on the list was one moderately positive comment, and in a
> German forum where I mentioned the router there was no reaction at all.
> People seem to prefer manually routing, and many seem to not like
> curved traces.
> 
> I do not really understand your term "intra-layer". My router is using
> arbitrary numbers of layers, and it connect the layers with
> automatically placed vias. Testing was done with two layers. I have
> some problems remembering details, have not touched it for more than
> too years. I think no crashes. The problem is, that there can remain
> unrouted traces due to space constraints. So some user interaction
> would be needed, for example for moving parts. Coding that part would
> be the fastest way to make that router useful, but coding that part is
> not really much fun and take some time. And when no one is interested
> at all? Making the router working without user interaction may be more
> interesting, that would include moving components. But that is more
> difficult and would need some time for coding. 
> 
> But I think I will continue at some time. The code is easy, short, and
> mostly based on that PhD thesis. But I have never cleaned it up
> unfortunately, and for latest CGAL and Ruby 2.2 some fixes may be
> necessary. Porting to Nim would be nice, but for that I would have to
> create bindings for CGAL first. Porting to C++ would be an option too
> of course, then I need no CGAL bindings, and integration in PCB program
> is easier. But that would be no fun for me.
> 
> Have you ever looked at the code of Anthony's toporouter? I tried a few
> hours in 2012 and early 2013, but really understood nearly nothing.
> Maybe you can -- there may exists some really smart ideas in his code.
> And the advantage of his code was that it works inside of PCB program
> already.
> 
> When you are generally interested in routing, you may consider the
> router of Alfons Wirts. Was something like freerouting.com, lately with
> copyright trouble but KiCad support, I have never really followed that
> project.

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