lwgeom_as_multi()

LWGEOM* lwgeom_as_multi

(

const LWGEOM *

lwgeom

)

Create a new LWGEOM of the appropriate MULTI* type.

Definition at line 371 of file lwgeom.c.

{
        LWGEOM **ogeoms;
        LWGEOM *ogeom = NULL;
        GBOX *box = NULL;
        int type;
 
        type = lwgeom->type;
 
        if ( ! MULTITYPE[type] ) return lwgeom_clone(lwgeom);
 
        if( lwgeom_is_empty(lwgeom) )
        {
                ogeom = (LWGEOM *)lwcollection_construct_empty(
                        MULTITYPE[type],
                        lwgeom->srid,
                        FLAGS_GET_Z(lwgeom->flags),
                        FLAGS_GET_M(lwgeom->flags)
                );
        }
        else
        {
                ogeoms = lwalloc(sizeof(LWGEOM*));
                ogeoms[0] = lwgeom_clone(lwgeom);
 
                /* Sub-geometries are not allowed to have bboxes or SRIDs, move the bbox to the collection */
                box = ogeoms[0]->bbox;
                ogeoms[0]->bbox = NULL;
                ogeoms[0]->srid = SRID_UNKNOWN;
 
                ogeom = (LWGEOM *)lwcollection_construct(MULTITYPE[type], lwgeom->srid, box, 1, ogeoms);
        }
 
        return ogeom;
}

References LWGEOM::bbox, LWGEOM::flags, FLAGS_GET_M, FLAGS_GET_Z, lwalloc(), lwcollection_construct(), lwcollection_construct_empty(), lwgeom_clone(), lwgeom_is_empty(), MULTITYPE, LWGEOM::srid, SRID_UNKNOWN, LWGEOM::type, and ovdump::type.

Referenced by LWGEOM_force_multi(), lwgeom_to_x3d3_sb(), RASTER_setPixelValuesGeomval(), and rt_raster_surface().

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