LWGEOM_to_BOX2D()

Datum LWGEOM_to_BOX2D

(

PG_FUNCTION_ARGS

)

Definition at line 129 of file lwgeom_box.c.

{
        GSERIALIZED *geom = PG_GETARG_GSERIALIZED_P(0);
        LWGEOM *lwgeom = lwgeom_from_gserialized(geom);
        GBOX gbox;
 
        /* Cannot box empty! */
        if ( lwgeom_is_empty(lwgeom) )
                PG_RETURN_NULL();
 
        /* Cannot calculate box? */
        if ( lwgeom_calculate_gbox(lwgeom, &gbox) == LW_FAILURE )
                PG_RETURN_NULL();
 
        /* Strip out higher dimensions */
        FLAGS_SET_Z(gbox.flags, 0);
        FLAGS_SET_M(gbox.flags, 0);
 
        PG_FREE_IF_COPY(geom, 0);
        PG_RETURN_POINTER(gbox_copy(&gbox));
}

References GBOX::flags, FLAGS_SET_M, FLAGS_SET_Z, gbox_copy(), LW_FAILURE, lwgeom_calculate_gbox(), lwgeom_from_gserialized(), and lwgeom_is_empty().

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