Dan McMahill wrote: > Dave N6NZ wrote: >> Dan McMahill wrote: > >> >>> The orientation is based on an algorithm that looks for which >>> quadrant pin #1 is in and then has some rules for what you do if it >>> is along an axis. >> >> I'm a little fuzzy on this. Can you be more specific about how you >> calculate rotation? > > the description follows > > http://pcb.sourceforge.net/pcb-20080202/pcb.html#Centroid%20File%20Format > > the full details start on line 322 of: > > http://pcb.cvs.sourceforge.net/pcb/pcb/src/hid/bom/bom.c?revision=1.13&view=markup >
OK, I'll go take a look. > > > hopefully the code there isn't too bad to read even if you're not up on > pcb code internals. > > The astute code reader will note that only multiples of 90 degrees work Ummmm.... I kind of like 45 degrees :) > and that if you have multiple pins/pads with the same number, they are > counted individually for the purposes of finding the centroid. There > are probably other ways of confusing the code. I'd welcome someone to > poke at the algorithm with a sharp pointy stick and see where it fails. OK, I'll take a look at doing some testing. I can think of three footprints where I have the same pin number. One is a SPST momentary switch with four legs, and the other two have big heat sink pads with the same pin numbers as ground. > > I'm not sure how to make the algorithm properly deal with angles other > than multiples of 90 degrees. That is a pretty major assumption. What are the barriers to other angles? > > I think before I entertain ideas of modifying that code I'd like to get > a regression testsuite in place. Makes sense. -dave _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
