On Mon, Oct 11, 2010 at 10:19:39PM +0200, Stefan Salewski wrote: > On Mon, 2010-10-11 at 11:26 -0700, Andrew Poelstra wrote: > > > I'm just throwing ideas into the air. What do you guys think? > > > > Andrew, I am not sure if you know that there was already a transition > from mil to 0.01 mil long time ago -- maybe that is useful information, > but that was before I started PCB, so I have no detailed information. >
Thanks, I'll look through the mailing list logs to see if there were any oddities I should be aware of. > 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 to the file format (254 by default, to maintain compatibility with existing .01mil files). Maybe the scale factor should be a float, so that boards can be made with sub-nanometer precision? In any case, I don't think the scale factor should be accessible from the GUI, just there for edge cases and people who like to hand-edit their pcb files. It could cause problems importing footprints whose grid is smaller than the base unit. > One funny point -- KiCAD developers have a similar discussion currently. > Andrew _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
