Re: gEDA-user: pcb crooked traces

[Stefan Salewski <mail@xxxxxxxxxxxx>]

On Mon, 2010-10-11 at 13:57 -0700, Andrew Poelstra wrote:

>  
> > What is your conclusion -- if we use 32 bit integer and nm base unit,
> > will we have maximun board size of 2m or 4m. That was not fully clear in
> > our discussion two years ago -- it does not really matter, but may be
> > good to know and to proof our understanding.
> > 
> 
> For the people who need to make giant PCBs on 32-bit systems, we should
> introduce a scale factor

My question was related to a post of Peter C.

>> 2^32 nm is about 4.3 meters, large enough for any PCB I've ever
>>seen.  
>> 2^64 nm is about 0.12 astronomical unit ;-)

>Well.. I can't recall if we use signed or unsigned numbers throughout,
>so we might end up limited at half those.

http://archives.seul.org/geda/user/Nov-2008/msg00448.html

May it be that signed integers are used, but that only the positive half
can be used for locations? I was only curious.




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