LWGEOM_GEOS_nodeLines()

static GEOSGeometry* LWGEOM_GEOS_nodeLines ( const GEOSGeometry *  lines )

static

Definition at line 337 of file liblwgeom/lwgeom_geos_clean.c.

References GEOS2LWGEOM(), LWDEBUGF, LWGEOM_GEOS_getPointN(), and lwgeom_to_ewkt().

Referenced by LWGEOM_GEOS_makeValidLine(), and LWGEOM_GEOS_makeValidPolygon().

{
        GEOSGeometry* noded;
        GEOSGeometry* point;

        /*
         * Union with first geometry point, obtaining full noding
         * and dissolving of duplicated repeated points
         *
         * TODO: substitute this with UnaryUnion?
         */

        point = LWGEOM_GEOS_getPointN(lines, 0);
        if ( ! point ) return NULL;

        LWDEBUGF(3,
                       "Boundary point: %s",
                       lwgeom_to_ewkt(GEOS2LWGEOM(point, 0)));

        noded = GEOSUnion(lines, point);
        if ( NULL == noded )
        {
                GEOSGeom_destroy(point);
                return NULL;
        }

        GEOSGeom_destroy(point);

        LWDEBUGF(3,
                       "LWGEOM_GEOS_nodeLines: in[%s] out[%s]",
                       lwgeom_to_ewkt(GEOS2LWGEOM(lines, 0)),
                       lwgeom_to_ewkt(GEOS2LWGEOM(noded, 0)));

        return noded;
}

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