gEDA-user: PCB gerber export problem

[DJ Delorie]

> A larger issue for the PCB developers is this: If so many CAM
> programs/operators can't read our perfectly valid Gerber files, then
> should we perhaps modify our Gerber output so that it can be read by
> even the most creaky, antique CAM program, and be imported
> successfully by the most brain-dead CAM operator?

It's an issue we constantly struggle with, especially since gerber is
an OLD standard that EVERYONE uses, and yet still there are many fab
houses that won't parse it properly.

Anyway, Harry's polygon clipper is an attempt at solving some of these
problems.  With it, there are never any clear layers - everything is
positive drawn.