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PMKR4

       SUBROUTINE  PMKR4 (DXARAY,INCX,DYARAY,INCY,DZARAY,INCZ,
      X                   HARRAY,INCH,N)
 C$    (Polymarker Relative 4-D)
 C$    Beginning at the current point,  draw markers at each of  N
 C$    homogeneous    world    coordinate    points    in    turn.
 C$    (DXARAY(*),DYARAY(*),DZARAY(*),HARRAY(*))    define     the
 C$    relative displacements  from  the preceding  point.   INCX,
 C$    INCY,  INCZ,  and  INCH   are  the  displacements   between
 C$    successive X, Y, Z, and H values in the arrays.  These will
 C$    normally be all 1.   If an increment  INCX, INCY, INCZ,  or
 C$    INCH is negative, the starting vertex is taken as (1-N)*INC
 C$    + 1 instead of 1, so  that the array is stepped through  in
 C$    reverse order.   The  marker  used  is  the  one  currently
 C$    selected.
 C$    (02-APR-82)