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HIDTV

       SUBROUTINE  HIDTV (Z1,ZE,Z2, MX,MY, NX,NY, PL2)
 C$    (Triangular View)
 C$    Produce a perspective  drawing of a  function defined  over
 C$    the unit triangle in terms of homogeneous coordinates.  The
 C$    function values occupy the lower triangular portion of  the
 C$    square  matrix  ZE(MX,MY),  of  which  only  the   fragment
 C$    ZE(NX,NY) is to be drawn.  The arguments are:
 C$
 C$    (MX,MY)........Actual declared dimensions of ZE(*,*)
 C$    ZE(NX,NY)......Array of function values
 C$    Z1,Z2..........Range of function values
 C$    PL2............2-D pen movement subroutine, usually PL2CA
 C$
 C$    (04-FEB-82)