Re: gEDA-user: gEDA-dev: Arc intersection connectivity bug

[Gabriel Paubert <paubert@xxxxxxx>]

On Fri, Nov 13, 2009 at 09:13:08AM +0000, Ineiev wrote:
> On 11/13/09, Gabriel Paubert <paubert@xxxxxxx> 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.

Well, expect the size of the Gerber files to explode and OpenGL
performance to drop...

I'm not really sure that I need even elliptical arcs for a start.

OTOH, I'd like to be able to have arc segments as boundary for polygons,
since it would simplify some common microwave structures.

	Regards,
	Gabriel


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