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DEM87

       SUBROUTINE  DEM87 (NIN,NOUT)
 C$    (DEM87 - Rotated Perspective Southeast View)
 C$    Demonstration  for the   general  view program, HIDGV.  The
 C$    surface represented is the same  one  used in DEM30, DEM31,
 C$    DEM37 and DEM86, which is the absolute  value of a function
 C$    of a  complex  variable with  five  poles located   at  the
 C$    vertices of a regular hexagon.
 C$
 C$    The  feature  illustrated  here is  the  combination  of  a
 C$    rotated  view with a perspective  view matrix, computed  at
 C$    various eye distances, and a southeast view matrix.
 C$    (08-FEB-90)