Esempi in C++ (Cpp) per OGRMultiSurface::CastToMultiPolygon

Esempio n. 1

File: gdal.cpp Progetto: rundel/sfr

// [[Rcpp::export]]
Rcpp::List CPL_multisurface_to_multipolygon(Rcpp::List sfc) { // need to pass more parameters?
	std::vector<OGRGeometry *> g = ogr_from_sfc(sfc, NULL);
	std::vector<OGRGeometry *> out(g.size());
	for (size_t i = 0; i < g.size(); i++) {
		OGRMultiSurface *cs = (OGRMultiSurface *) g[i];
		if (cs->hasCurveGeometry(true)) {
			out[i] = cs->getLinearGeometry();
			OGRGeometryFactory::destroyGeometry(g[i]);
		} else
			out[i] = cs->CastToMultiPolygon(cs); // consumes cs #nocov
		if (out[i] == NULL)
			Rcpp::stop("CPL_multisurface_to_multipolygon: NULL returned - non-polygonal surface?"); // #nocov
	}
	return sfc_from_ogr(out, true); // destroys out;
}