On Wed, 2010-02-10 at 02:11 -0600, Mark Rages wrote: > I filed a bug and uploaded a file which exhibits this: > > https://sourceforge.net/tracker/?func=detail&aid=2948916&group_id=73743&atid=538811 > > On Wed, Feb 10, 2010 at 1:29 AM, Mark Rages <[email protected]> wrote: > > I'm trying to work with a rather compex polygon ground plane. I get > > the following spew on the terminal, then crash:
I see a ground plane and some tracks - on different layers. Is that expected. I don't get any polygon clipping errors on the console with my experimental branches - but I _do_ see a rendering error, which looks like the sort of error we encounter if PCB produces a self-intersecting polygon. Did you computer generate the polygon? (Is it possible there is an erroneous coordinate in it somewhere?) The fact I don't see complaining - either means that I'm not taking the required steps to reproduce (ie.. what is subtracting from the polygon if your lines are on a different layer?) Adding vias, or things cutting the polygons - I can't seem to make it complain on the console. This suggests that the bug isn't manifesting in the same way on my branch - which gives a (small) clue. It could be (I've seen it before), that the no-holes polygon dicer gets stuck into a recursive loop due to a polygon which keeps dicing in two to give something with holes in it. That can run the program out of stack space and crash it, although your console warnings don't "quite" look like that. Running under GDB might tell more - but I've not got the time to do that just now. Unfortunately, if it is the ever lurking "self-intersection" problem - I can't fix it easily. We need to introduce a topology preserving, snap- rounding based polygon intersection routine, and that is _hard_. I can only suggest attempting to work around the issue by tweaking your polygon geometry. If you generated it progmatically, be sure to check your coordinates don't cause a self-intersection. > _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
