Re: gEDA-user: autorouting

[Tomaz Solc <tomaz.solc@xxxxxxxxxx>]

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Hi

> I use the built-in one, when I use it at all.  Mostly I hand-route.

I'm curious. In which cases do you use the built-in autorouter?

Recently I was trying to use it to make a single-layer PCB for a
keyboard with 54 keys - one of the most simple and undemanding PCB
layouts I could think of. I didn't care how inefficient layout was
produced as long as it was routed correctly.

It turned out the autorouter failed to route about a third of all nets
and in the end I had to route it by hand.

As a side question: how hard would it be to modify the autorouter so
that it would strongly prefer one layer - in other words to make as few
"jumpers" on the component side as possible. I haven't looked yet in
detail how it works, but if it uses a genetic or similar algorithm, I
guess that would be just a matter of adding some weights to the fitness
function.

Best regards
Tomaz
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