Re: gEDA-user: Toporouter Changes

[John Griessen <john@xxxxxxxxxxxxxx>]

Bill Gatliff wrote:
> I bet that Anthony's toporouter probably has some hooks already in place 
> that could make that possible.  The first trace one puts down on a board 
> can go in an infinite number of directions, so he has to know that some 
> paths are "better" than others. 
[jg]Yes. We can see his program choosing a min-path-length-hugging route
curving around to the right from the upper left in http://www.wand.net.nz/~amb33/toporouter/linksys-toporouted.png
It's fabulous!

  Seems like the force-field approach
> just tweaks his "better" definition based on user input and not just the 
> board geometrics.
Right.  To move in one direction from a point that repels is one way to code such a function.
Another would be a straight line, and even better, a hand drawn line-segment line
carving out regions of circuitry that should stay some distance away from eachother.
Then rerun the program with wider DRC rules for the next region to pack against the first. and so on.


   He could
> just throw that in at the same time he's tinkering around with those 
> magic "via" things everyone seems so keen on.  :) :)

Oh, it's so easy to imagine others doing what's important to you, but they always
do what's important to them, eh?  :-)   ;-)

John Griessen
-- 
Ecosensory   Austin TX


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