lwgeom_get_geos_coordseq_2d()

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

static

Definition at line 2065 of file liblwgeom/lwgeom_geos.c.

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

Referenced by lwgeom_voronoi_diagram().

{
        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(!GEOSCoordSeq_setX(coords, i, tmp.x) || !GEOSCoordSeq_setY(coords, i, tmp.y))
                {
                        GEOSCoordSeq_destroy(coords);
                        lwpointiterator_destroy(it);
                        return NULL;
                }
                i++;
        }
        lwpointiterator_destroy(it);

        return coords;
}

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