lwgeom_add_bbox_deep()

void lwgeom_add_bbox_deep ( LWGEOM *  lwgeom, GBOX *  gbox  )

extern

Compute a box for geom and all sub-geometries, if not already computed.

Definition at line 714 of file lwgeom.c.

{
        if ( lwgeom_is_empty(lwgeom) ) return;
 
        FLAGS_SET_BBOX(lwgeom->flags, 1);
 
        if ( ! ( gbox || lwgeom->bbox ) )
        {
                lwgeom->bbox = gbox_new(lwgeom->flags);
                lwgeom_calculate_gbox(lwgeom, lwgeom->bbox);
        }
        else if ( gbox && ! lwgeom->bbox )
        {
                lwgeom->bbox = gbox_clone(gbox);
        }
 
        if ( lwgeom_is_collection(lwgeom) )
        {
                uint32_t i;
                LWCOLLECTION *lwcol = (LWCOLLECTION*)lwgeom;
 
                for ( i = 0; i < lwcol->ngeoms; i++ )
                {
                        lwgeom_add_bbox_deep(lwcol->geoms[i], lwgeom->bbox);
                }
        }
}

References LWGEOM::bbox, LWGEOM::flags, FLAGS_SET_BBOX, gbox_clone(), gbox_new(), LWCOLLECTION::geoms, lwgeom_add_bbox_deep(), lwgeom_calculate_gbox(), lwgeom_is_collection(), lwgeom_is_empty(), and LWCOLLECTION::ngeoms.

Referenced by geography_distance_knn(), geography_distance_uncached(), and lwgeom_add_bbox_deep().

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