On Sep 6, 2010, at 2:40 PM, DJ Delorie wrote: > >> Why arc and circle are not merged? Because the diameter of the arc >> is the center of the bent line; however, the diameter of a circle is >> the edge. > > I.e. you're listing a *stroked* arc vs a *filled* circle? > > I like the idea of using geometric shapes at the lowest level, but for > most PCBs this is *way* too low-level to be efficient. We need some > way of arbitrarily grouping shapes, grouping groups, etc, and creating > some sort of macro/library/callout for those groups, so that we don't > end up (for example) redefining a pad stack for every one of hundreds > of pins. > > If our PCB file format had the concept of a "grouping function" that > could define named macros that took named parameters, with some simple > math and control logic, we could then use those macros to define new > primitives. So a function that defined a standard pad stack for a pin > could be later called with a few simple parameters for each needed > pin. > > This same grouping function becomes our element library :-)
Yes. Build higher-level objects by composition, not merely by listing. Higher-level objects are certainly important and meaningful to the designer. John Doty Noqsi Aerospace, Ltd. http://www.noqsi.com/ j...@noqsi.com _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user