lwgeom_add_bbox_deep()

void lwgeom_add_bbox_deep	(	LWGEOM *	lwgeom,
		GBOX *	gbox
	)

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

Definition at line 660 of file lwgeom.c.

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

Referenced by geography_distance_knn(), and geography_distance_uncached().

{
        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) )
        {
                int i;
                LWCOLLECTION *lwcol = (LWCOLLECTION*)lwgeom;

                for ( i = 0; i < lwcol->ngeoms; i++ )
                {
                        lwgeom_add_bbox_deep(lwcol->geoms[i], lwgeom->bbox);
                }
        }
}

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