NGRITD - Given the coordinates of a point, this routine performs a rotation of that point about a

       To  use NGRITD or c_ngritd, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c, preferably in
       that order.

       The C binding argument descriptions are the same as the FORTRAN argument descriptions.

       #include <ncarg/ncargC.h>

       void c_ngritd(int iaxs, float angl, float *ucrd, float *ycrd,
       float *wcrd)

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

UNIX                                               March 1993                                     NGRITD(3NCARG)

       IAXS        (an  input  expression of type INTEGER) specifies the axis about which rotation is to be done
                   (1 for the U axis, 2 for the V axis, and 3 for the W axis).

       ANGL        (an input expression of type REAL) specifies the  magnitude,  in  degrees,  of  the  rotation
                   angle.

       UCRD        (an  input/output  variable  of  type  REAL)  specifies  the  U coordinate of the point being
                   rotated.

       VCRD        (an input/output variable of type REAL)  specifies  the  V  coordinate  of  the  point  being
                   rotated.

       WCRD        (an  input/output  variable  of  type  REAL)  specifies  the  W coordinate of the point being
                   rotated.

       Use the ncargex command to see the following relevant example: cpex10.

       None.

       NGRITD - Given the coordinates of a point, this routine performs a rotation of that point about a
       specified axis by a specified angle.

       Online: nggcog(3NCARG), nggsog(3NCARG).

       CALL NGRITD (IAXS,ANGL,UCRD,VCRD,WCRD)

       This routine is used by NGGCOG and NGGSOG to effect the rotations that are used to generate an object  of
       a specified shape at a specified point on the surface of the globe.

       NGRITD  assumes  that  the  UVW coordinate system is right-handed.  Positive values of ANGL give counter-
       clockwise rotations and negative values of ANGL give clockwise rotations.  (When IAXS  =  1,  ANGL  =  90
       carries  the  positive  V  axis into the positive W axis; when IAXS = 2, ANGL = 90 carries the positive W
       axis into the positive U axis; when IAXS = 3, ANGL = 90 carries the positive U axis into the  positive  V
       axis.)