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MATXIM

       SUBROUTINE  MATXIM (TINQ)
 C$    (Transform -- Inquire Matrix)
 C$    Return  the   current  stored   transformation  matrix   in
 C$    TINQ(4,4) for the MATXxx() matrix transformation package.
 C$
 C$    If MATXSM()  has not  been called  previously, it  will  be
 C$    called here to set  an initial unix  matrix, and that  unit
 C$    matrix will be returned.  This  makes it possible to  write
 C$    "black-box" code that calls  MATXIM() and MATXID() to  save
 C$    the  state  of  the  transformation  package,  changes  the
 C$    matrices by calls to the other MATXxx() routines, and  then
 C$    restores the state by calls to MATXSM() and MATXSD().
 C$    (08-FEB-90)