lwgeom_get_geos_coordseq_2d()

static GEOSCoordSequence* lwgeom_get_geos_coordseq_2d ( const LWGEOM *  g, uint32_t  num_points  )

static

Definition at line 2021 of file liblwgeom/lwgeom_geos.c.

{
        uint32_t i = 0;
        uint8_t num_dims = 2;
        LWPOINTITERATOR* it;
        GEOSCoordSequence* coords;
        POINT4D tmp;
 
        coords = GEOSCoordSeq_create(num_points, num_dims);
        if (!coords) return NULL;
 
        it = lwpointiterator_create(g);
        while (lwpointiterator_next(it, &tmp))
        {
                if (i >= num_points)
                {
                        lwerror("Incorrect num_points provided to lwgeom_get_geos_coordseq_2d");
                        GEOSCoordSeq_destroy(coords);
                        lwpointiterator_destroy(it);
                        return NULL;
                }
 
#if POSTGIS_GEOS_VERSION < 30800
                if (!GEOSCoordSeq_setX(coords, i, tmp.x) || !GEOSCoordSeq_setY(coords, i, tmp.y))
#else
                if (!GEOSCoordSeq_setXY(coords, i, tmp.x, tmp.y))
#endif
                {
                        GEOSCoordSeq_destroy(coords);
                        lwpointiterator_destroy(it);
                        return NULL;
                }
                i++;
        }
        lwpointiterator_destroy(it);
 
        return coords;
}

References lwerror(), lwpointiterator_create(), lwpointiterator_destroy(), lwpointiterator_next(), POINT4D::x, and POINT4D::y.

Referenced by lwgeom_voronoi_diagram().

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