On Mon, Oct 11, 2010 at 11:15:54PM +0200, Stefan Salewski wrote: > 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. >
I think we want to allow negative locations. It would be nice to set parts outside of the pcb boundary, for example when initially placing everything. Andrew _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
