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MATXSM

       SUBROUTINE  MATXSM (TNEW)
 C$    (Transform -- Set Matrix)
 C$    Set the current transformation matrix to TNEW(4,4) for  the
 C$    MATXxx() family.  This routine MUST be called before any of
 C$    the MATXxx()  routines  are  called;  they  will  otherwise
 C$    return immediately without doing anything.
 C$
 C$    Debug print options are initially  turned off; they may  be
 C$    set with MATXSD() and inquired with MATXID().
 C$    (08-FEB-90)