lwpoly_construct()

LWPOLY * lwpoly_construct ( int32_t  srid, GBOX *  bbox, uint32_t  nrings, POINTARRAY **  points  )

extern

Definition at line 43 of file lwpoly.c.

{
        LWPOLY *result;
        int hasz, hasm;
#ifdef CHECK_POLY_RINGS_ZM
        char zm;
        uint32_t i;
#endif
 
        if ( nrings < 1 ) lwerror("lwpoly_construct: need at least 1 ring");
 
        hasz = FLAGS_GET_Z(points[0]->flags);
        hasm = FLAGS_GET_M(points[0]->flags);
 
#ifdef CHECK_POLY_RINGS_ZM
        zm = FLAGS_GET_ZM(points[0]->flags);
        for (i=1; i<nrings; i++)
        {
                if ( zm != FLAGS_GET_ZM(points[i]->flags) )
                        lwerror("lwpoly_construct: mixed dimensioned rings");
        }
#endif
 
        result = (LWPOLY*) lwalloc(sizeof(LWPOLY));
        result->type = POLYGONTYPE;
        result->flags = lwflags(hasz, hasm, 0);
        FLAGS_SET_BBOX(result->flags, bbox?1:0);
        result->srid = srid;
        result->nrings = nrings;
        result->maxrings = nrings;
        result->rings = points;
        result->bbox = bbox;
 
        return result;
}

References FLAGS_GET_M, FLAGS_GET_Z, FLAGS_GET_ZM, FLAGS_SET_BBOX, lwalloc(), lwerror(), lwflags(), POLYGONTYPE, and result.

Referenced by _lwt_MakeRingShell(), GEOS2LWGEOM(), hexagon(), lwcurvepoly_linearize(), LWGEOM_dump_rings(), LWGEOM_envelope(), lwmsurface_linearize(), lwpoly_force_dims(), lwpoly_from_lwlines(), lwpoly_segmentize2d(), parse_geojson_poly_rings(), parse_gml_linearring(), parse_gml_patch(), parse_gml_polygon(), parse_kml_polygon(), polygon_to_geometry(), rt_raster_get_convex_hull(), rt_raster_get_envelope_geom(), rt_raster_get_perimeter(), rt_raster_pixel_as_polygon(), rt_util_envelope_to_lwpoly(), and SFCGAL2LWGEOM().

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