DJ, I think with most polygon libraries, when you do a union, you can get back the coordinates of where the overlap occurs. At that point, you should be able to zoom in, or generate an image of the offending location.
I haven't tried it yet, but thats my understanding. A couple of libraries and code samples that I have found with an initial search are: http://www.cs.man.ac.uk/~toby/alan/software/ http://clippoly.sourceforge.net/ http://sourceforge.net/projects/polyclipping/ http://boolean.klaasholwerda.nl/bool.html http://www.cgal.org/Manual/3.2/doc_html/cgal_manual/Boolean_set_operations_2/Chapter_main.html cgal and polyclipping (clipper) look promising. I'm gonna mess around with it a bit and see what I can figure out. Perhaps PCB has some code in it that we can use as a starting point? Glad to see there is some interest here. On 4/1/2011 6:56 PM, DJ Delorie wrote: >> * bloat or reduce those shapes by a certain amount, > PCB does it this way. The biggest problem is, a drc violation doesn't > always mean you know *where* it happened. If you actually measure > distances between objects, you know exactly where the violation > happens. > > ------------------------------------------------------------------------------ > Create and publish websites with WebMatrix > Use the most popular FREE web apps or write code yourself; > WebMatrix provides all the features you need to develop and > publish your website. http://p.sf.net/sfu/ms-webmatrix-sf > _______________________________________________ > Gerbv-devel mailing list > Gerbv-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/gerbv-devel > > ------------------------------------------------------------------------------ Create and publish websites with WebMatrix Use the most popular FREE web apps or write code yourself; WebMatrix provides all the features you need to develop and publish your website. http://p.sf.net/sfu/ms-webmatrix-sf _______________________________________________ Gerbv-devel mailing list Gerbv-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gerbv-devel
