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PL2CA

       SUBROUTINE  PL2CA (X,Y,VISBLE)
 C$    (2-D Cartesian Pen Movement)
 C$    Move to  the  point  (X,Y), with visibility  determined  by
 C$    VISBLE.  The  coordinates will  normally  lie in  the  unit
 C$    range  0.0..1.0,  as  is  the  case  for  the  contour  and
 C$    hidden-line routines, but  any values  may be  used if  the
 C$    window is set accordingly.
 C$    (09-APR-82)