On Fri, 13 Nov 2009 09:13:08 +0000, Ineiev <[email protected]> wrote: > On 11/13/09, Gabriel Paubert <[email protected]> wrote: >> On Fri, Nov 13, 2009 at 01:42:33AM +0000, Peter Clifton wrote: >> Anyway, right now you won't be able to produce the corresponding >> photoplotter files. >> >> While as far as I know Gerber only allows circular interpolation: >> >> http://www.artwork.com/gerber/274x/rs274xrevd_e.pdf >> >> it may be possible to produce elliptical arcs by using the SF >> command (scaling factor). Neither the PCB nor the Gerber file >> format allow to describe ellipses with arbitrary orientation. > > IMO if PCB would fully support such complicated curves, it would > better support something general like beziers; it would not be much > harder, but more useful.
I agree -- Bezier splines are much more useful and flexible than ellipses, and as an added bonus it's possible to use them to approximate an ellipse closely. Peter -- Peter Brett <[email protected]> Remote Sensing Research Group Surrey Space Centre _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
