GSCHUP (Set character up vector) - specifies the angle at which subsequent text is to be drawn with GTX.

       To use GKS routines, load the NCAR GKS-0A library ncarg_gks.

       #include <ncarg/gks.h>

       void gset_char_up_vec(const Gvec *char_up_vec);

       Copyright (C) 1987-2009
       University Corporation for Atmospheric Research
       The use of this Software is governed by a License Agreement.

UNIX                                               March 1993                                     GSCHUP(3NCARG)

       CHUX        (Real, Input) - Gives the X (horizontal) world coordinate of a vector.

       CHUY        (Real, Input) - Gives the Y (vertical) world coordinate of a vector.

             CALL GSCHUP(-1.,0.)

       would  specify  the character up vector as (-1.,0.) and subsequent text written with GTX would be rotated
       90 degrees from normal and would be appropriate for a Y-axis label.

             CALL GSCHUP(1.,1.)

       would specify the character up vector as (1.,1.) and subsequent text written with GTX  would  be  rotated
       -45 degress from normal.

       GSCHUP (Set character up vector) - specifies the angle at which subsequent text is to be drawn with GTX.

       Online:  gtx,  gstxp,  gstxal, gstxfp, gschh, gschsp, gschxp, gscr, gstxci, gqtxp, gqtxal, gqtxfp, gqchh,
       gqchsp, gqchup, gqchxp, plotchar, gset_char_up_vec

       Hardcopy: User's Guide for NCAR GKS-0A Graphics; NCAR Graphics Fundamentals, UNIX Version

       CALL GSCHUP (CHUX, CHUY)

       The coordinates (CHUX, CHUY) relative to the point (0.,0.)  establish a vector direction.  This direction
       specifies  the up direction of individual characters.  This direction also specifies the orientation of a
       text string in that the characters in a string are placed along a line perpendicular to the character  up
       vector.   By  default  the  character  up  vector is (0.,1.) so that characters are drawn in their normal
       horizontal orientation.  The magnitude of the up vector is not used so  that  (0.,23.)  is  the  same  as
       (0.,1.).