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Subject: Re: [geda-user] Find rat lines
From: Peter Clifton <pcjc2 AT cam DOT ac DOT uk>
To: geda-user AT delorie DOT com
Date: Fri, 14 Dec 2012 20:52:55 +0000
In-Reply-To: <50CB6CF7.5050905@zepler.net>
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On Fri, 2012-12-14 at 18:16 +0000, Chris Smith wrote:
> On 14/12/2012 17:29, Markus Hitter wrote:
> > Am 14.12.2012 17:58, schrieb Chris Smith:
> >> The advantage of net
> >> association is that it can work online -- it can tell the user 'what you
> >> are doing right now is going to cause a problem' ...
> > 
> > In other words, assinging a track to a net is sort of a cache? While
> > answering that other message I came to a similar conclusion.
> 
> No, I don't think of it that way.  To me it is a fundamental attribute,
> not just a cache.


Personally - I think we should support this too. I _often_ wish to
assign "net=GND" to a polygon, for example. It would then let you invoke
actions to auto-thermal pins belonging to the GND net.

I don't think it should be _required_, as I certainly wouldn't use it
for most of my general signal tracking.

PCB being _aware_ that you're about to short something out is still
possible, even if you haven't told it what net you are trying to draw.

The smart heuristics can then dig you out of the more complex holes, and
in general - would be used to pick out the objects which cause shorts.
(Explicit net tags on any copper here will aid to identify the short
location more effectively - as per the designer's intentions).

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

Clifton Electronics