Re: gEDA-user: A not too serious PCB question

[Kovács Levente <leventelist@xxxxxxxxx>]

Joerg írta:
> Bill Gatliff wrote:
>> Andy Fierman wrote:
>>> Could open a whole new topological discussion on auto routers though :)
>>>   
>> I don't know how you could automate the boundary descriptions, but once 
>> you had that then it looks like a basic flood-fill...
>>
> 
> Typically this isn't done fully automated. One method is to autoroute or 
> do a regular hand layout with default trace width, fatten up or fill 
> every other trace by hand section by section, then do an auto-fill for 
> the remaining traces.

It would be easyer with PCB, if polygons had net attribute. I mean if 
you place a polygon on the layout, it is just a graphical object. You 
have to control the gaps, etc. manually.

> It would theoretically be possible to automate by having the SW perform 
> ratiometric trace width adaptation but it would require that it also 
> handles off-center situations where the density increases. I have never 
> heard of a layout program that can do all of this by itself, but who knows.
> 



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