| 
	    plglevel
	  ( | p_level ); | 
Get the (current) run level. Valid settings are:
0, uninitialized
1, initialized
2, viewport defined
3, world coordinates defined
p_level
	  (PLINT_NC_SCALARReturned value of the run level.
      Redacted form: plglevel(p_level)
    
This function is used in example 31.