Re: gEDA-user: Off-by-one display

[Steve Meier <smeier@xxxxxxxxxxxxxxxxxxx>]

Well, Ideally you would want your vertexes to match or at intersect with
the line segments between the other polygons vertexes. But, for a gerber
plot I am a little unclear how a polygon is developed.  Is an aperture
created for every polygon or is the polygon created by sweeping a
smaller aperture back and forth?

Steve Meier


On Mon, 2005-01-10 at 07:03, Karel Kulhavy wrote:
> On Mon, Jan 10, 2005 at 09:58:30AM -0500, DJ Delorie wrote:
> > 
> > > Is PCB supposed to keep topology, i. e. for example not draw
> > > background where from principle never is?
> > 
> > PCB uses X to draw all of its screen objects, and I don't think it
> > tries too hard to get the border cases right.  Since X is very picky
> > about how to specify border cases, it's understandable that it might
> > be off by a pixel here and there.  Now, if the PS or Gerber output has
> > such problems, THAT is a bug.
> 
> So I can put rectangles side-by-side in Gerber and Postscript and the
> fab house must not say anything? :)
> 
> Cl<