This is uneccessary - there is already a perfectly well defined way of representing emptiness for every Geometry class. And this is simple to test.
Martin Davis, Senior Technical Architect Vivid Solutions Inc. www.vividsolutions.com Suite #1A-2328 Government Street Victoria, B.C. V8T 5G5 Phone: (250) 385 6040 - Local 308 Fax: (250) 385 6046 > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > Mateusz Loskot > Sent: March 31, 2006 12:03 AM > To: GEOS Development List > Subject: Re: [geos-devel] Is empty LinearRing closed? > > > [EMAIL PROTECTED] wrote: > > On Thu, Mar 30, 2006 at 02:42:19PM -0800, Martin Davis wrote: > >> I'm not sure why strk is making this comment. JTS/GEOS supports > >> empty geometries of all types (as per the OGC SFS). > > > > I'm a bit PostGIS oriented. There's no support for EMPTY > whatever in > > PostGIS except GEOMETRYCOLLECTION. As always I'd follow > JTS, so if the > > plan is to support any kind of empty geom we should drop the > > ::createEmptyGeometry() and ensure no memory violation is triggered > > by EMPTY types *and* results are semantically correct. > > Hi, > > Another idea, possible and simple way to handle empty > geometries would be to add a boolean flag to the Geometry > class - bool empty; > > Then, if this flag is set, the geometry is empty. > > Drawback: > This approach requires to keep this flag synchronized with > state of geometry to avoid situation when geometry is a > non-empty set of points but the empty flag is set to true ;-) > > Cheers > -- > Mateusz Łoskot > http://mateusz.loskot.net > _______________________________________________ > geos-devel mailing list > geos-devel@geos.refractions.net > http://geos.refractions.net/mailman/listinfo/geos-devel > _______________________________________________ geos-devel mailing list geos-devel@geos.refractions.net http://geos.refractions.net/mailman/listinfo/geos-devel
