Esempi in C++ (Cpp) per lwgeom_extract_endpoints

Esempio n. 1

File: lwgeom_geos_node.c Progetto: gbroccolo/postgis

/* May return LWPOINT or LWMPOINT */
static LWGEOM*
lwgeom_extract_unique_endpoints(const LWGEOM* lwg)
{
	LWGEOM* ret;
	GEOSGeometry *gepu;
	LWMPOINT *epall = lwgeom_extract_endpoints(lwg);
	GEOSGeometry *gepall = LWGEOM2GEOS((LWGEOM*)epall, 1);
	lwmpoint_free(epall);
	if ( ! gepall ) {
		lwerror("LWGEOM2GEOS: %s", lwgeom_geos_errmsg);
		return NULL;
	}

	/* UnaryUnion to remove duplicates */
	/* TODO: do it all within pgis using indices */
	gepu = GEOSUnaryUnion(gepall);
	if ( ! gepu ) {
		GEOSGeom_destroy(gepall);
		lwerror("GEOSUnaryUnion: %s", lwgeom_geos_errmsg);
		return NULL;
	}
	GEOSGeom_destroy(gepall);

	ret = GEOS2LWGEOM(gepu, FLAGS_GET_Z(lwg->flags));
	GEOSGeom_destroy(gepu);
	if ( ! ret ) {
		lwerror("Error during GEOS2LWGEOM");
		return NULL;
	}

	return ret;
}

Esempio n. 2

File: lwgeom_geos_node.c Progetto: JeremyGrosser/postgis

/* May return LWPOINT or LWMPOINT */
static LWGEOM*
lwgeom_extract_unique_endpoints(const LWGEOM* lwg)
{
#if POSTGIS_GEOS_VERSION < 33
	lwerror("The GEOS version this postgis binary "
	        "was compiled against (%d) doesn't support "
	        "'GEOSUnaryUnion' function (3.3.0+ required)",
	        POSTGIS_GEOS_VERSION);
	return NULL;
#else /* POSTGIS_GEOS_VERSION >= 33 */
	LWGEOM* ret;
	GEOSGeometry *gepu;
	LWMPOINT *epall = lwgeom_extract_endpoints(lwg);
	GEOSGeometry *gepall = LWGEOM2GEOS((LWGEOM*)epall);
	lwmpoint_free(epall);
	if ( ! gepall ) {
		lwerror("LWGEOM2GEOS: %s", lwgeom_geos_errmsg);
		return NULL;
	}

	/* UnaryUnion to remove duplicates */
	/* TODO: do it all within pgis using indices */
	gepu = GEOSUnaryUnion(gepall);
	if ( ! gepu ) {
		GEOSGeom_destroy(gepall);
		lwerror("GEOSUnaryUnion: %s", lwgeom_geos_errmsg);
		return NULL;
	}
	GEOSGeom_destroy(gepall);

	ret = GEOS2LWGEOM(gepu, FLAGS_GET_Z(lwg->flags));
	GEOSGeom_destroy(gepu);
	if ( ! ret ) {
		lwerror("Error during GEOS2LWGEOM");
		return NULL;
	}

	return ret;
#endif /* POSTGIS_GEOS_VERSION >= 33 */
}