Hi, I'm bringing next subject to discuss.
The main question is what should be returned by getEnvelope() called on empty polygon? Here is simple use case: GeometryFactory factory(...); //... // create empty polygon Polygon* poly = factory.createPolygon(); // request for its envelope Geometry* geo = 0; geo = poly->getEnvelope(); geo->isEmpty(); // <--- THE PROBLEM As I revealed, when exterior ring is empty geometry, getEnvelope() returns or creates instance of envelope object. This object is initialized by Envelope::setToNull(). So, returned envelope for empty polygon has following coordinates: minx = -1.0 maxx = 0.0 miny = -1.0 maxx = 0.0 Is this correct behaviour? Is empty polygon assumed to return non-empty envelope as above? Cheers -- Mateusz Łoskot http://mateusz.loskot.net _______________________________________________ geos-devel mailing list geos-devel@geos.refractions.net http://geos.refractions.net/mailman/listinfo/geos-devel
