Re: gEDA-user: pcb, how to remove mm garbage (very short lines)?

[Peter Clifton <pcjc2@xxxxxxxxx>]

On Wed, 2008-11-19 at 18:58 -0700, John Doty wrote:
> On Nov 19, 2008, at 4:08 PM, Peter Clifton wrote:

> >> 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.
> 
> If it's signed, you can go 2.1 m either way, so it's the same.

Depends.. if my world is 4.3 meters long, I can't make a signed vector
across its span.. I'd have to be very careful when computing the
difference in position between two points - I'd need one extra bit.
-- 
Peter Clifton

Electrical Engineering Division,
Engineering Department,
University of Cambridge,
9, JJ Thomson Avenue,
Cambridge
CB3 0FA

Tel: +44 (0)7729 980173 - (No signal in the lab!)



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