X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient: geda-user AT delorie DOT com
X-Cam-AntiVirus: no malware found
X-Cam-SpamDetails: not scanned
X-Cam-ScannerInfo: http://www.cam.ac.uk/cs/email/scanner/
Message-ID: <1355860446.13534.5.camel@localhost>
Subject: Re: [geda-user] pcb fundamentals
From: Peter Clifton <pcjc2 AT cam DOT ac DOT uk>
To: geda-user AT delorie DOT com
Date: Tue, 18 Dec 2012 19:54:06 +0000
In-Reply-To: <E65E22D7-6585-4455-91B5-166123327198@noqsi.com>
References: <172CCAAB-0423-43EF-8A04-5A9961F1D5B9 AT noqsi DOT com>
	 <201212140122 DOT qBE1MoKM019255 AT envy DOT delorie DOT com>
	 <5AA18F19-2EA9-4E7D-9378-F768D8E1E5DD AT jump-ing DOT de>
	 <alpine DOT DEB DOT 2 DOT 00 DOT 1212140501300 DOT 26605 AT igor2priv>
	 <50CB5D82 DOT 8060507 AT jump-ing DOT de>
	 <E5DE4486-B23F-4945-943A-F46C6E308B90 AT noqsi DOT com>
	 <201212141820 DOT qBEIKQDN005665 AT envy DOT delorie DOT com>
	 <43147C45-75A5-4393-AB07-AFBFD7BD09BA AT noqsi DOT com>
	 <CAC4O8c_YzeqQ84huGrZPL+=aK5C89phD3VgRHko40N8hWCzw7A AT mail DOT gmail DOT com>
	 <95896B46-44E5-40BA-AB8F-2A81E6073CAD AT noqsi DOT com>
	 <20121215010326 DOT 26307 DOT qmail AT stuge DOT se>
	 <57596F89-BBC2-4BEE-8401-AD036143A260 AT noqsi DOT com>
	 <1355593978 DOT 19071 DOT 2 DOT camel AT localhost>
	 <E65E22D7-6585-4455-91B5-166123327198 AT noqsi DOT com>
Content-Type: text/plain; charset="UTF-8"
X-Mailer: Evolution 3.6.0-0ubuntu3 
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
Reply-To: geda-user AT delorie DOT com
Errors-To: nobody AT delorie DOT com
X-Mailing-List: geda-user AT delorie DOT com
X-Unsubscribes-To: listserv AT delorie DOT com
Precedence: bulk

On Sun, 2012-12-16 at 16:06 -0700, John Doty wrote:

> Again, it reminds me of the difference between the road net in
> downtown Boston versus Manhattan. The Boston road net started as
> pcb-like special cases (need a road from the warf to the tavern,
> etc.). It has been repeatedly "patched" to accommodate new "use
> cases".

Sounds like various areas of both the gEDA and PCB code-bases to me ;)


>  The result is difficult to navigate. Contrast that with Manhattan,
> which is mostly regular grid. Even though there are some irregular
> blockages, it is relatively easy to find a route from any point to any
> other point (and Manhattan is *much* bigger than downtown Boston).
> There are also a few "short cuts". Fundamental regularity does not
> need perfect implementation to be navigable.

Despite knowing and understanding the term "Manhatten distance" and
"Manhatten routing", it took me a while to appreciate the link between
the term and the place (and road layout!).

Anyway.. 


-- 
Peter Clifton <peter DOT clifton AT clifton-electronics DOT co DOT uk>

Clifton Electronics