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VISES

       SUBROUTINE  VISES (Z1,ZE,Z2, X1,X2,NX, E1,E2,NE, L,M, PL2)
 C$    (Elliptical Sequence)
 C$    Make a hidden line view of a function defined in elliptic
 C$    cylinder coordinates.  The arguments are:
 C$
 C$    (Z1,Z2)........Range of ZE(*,*).
 C$    (X1,X2)........Range of XI.
 C$    (E1,E2)........Range of ETA.
 C$    NX.............Number of XI values.
 C$    NE.............Number of ETA values.
 C$    L..............Direction of view and increment (+: west,
 C$                   -: east)
 C$    M..............Direction of view and increment (+: south,
 C$                   -: north)
 C$    PL2............2-D pen movement subroutine, normally PL2CA
 C$    (09-APR-82)