NAME

       WTSTR - draws a specified text string at a specified position in the user coordinate
       system.  The call has arguments specifying the size, orientation, and centering of the
       string.

STATUS

       WTSTR specifies character sizes in Plotter Address Units (PAUs), which are no longer used
       in NCAR Graphics; thus, WTSTR is considered an obsolete routine.

       The current recognized coordinate systems are GKS world coordinates, GKS normalized device
       coordinates, NCAR Graphics fractional coordinates, and NCAR Graphics user coordinates.
       See the NCAR Graphics document "NCAR Graphics Fundamentals, UNIX Version" for a
       description of these coordinate systems.

       WTSTR continues to be provided for compatibility of early NCAR Graphics codes.  If you are
       writing new code, we suggest that you use the more general text writing routines of the
       Plotchar utility:  PLCHLQ, PLCHMQ, and PLCHHQ.

       The following definition of the PAU Coordinate System is included for the purpose of
       interpreting and converting PAU codes:

       The plotter coordinates of a point are integers IPX and IPY, where IPX is between 1 and
       2**MX and IPY is between 1 and 2**MY.  MX and MY are internal parameters of SPPS; each has
       the default value 10.  Values of MX and MY can be set by the routine SETI and retrieved by
       the routine GETSI.

SYNOPSIS

       CALL WTSTR(PX,PY,CH,IS,IO,IC)

DESCRIPTION

       PX          (an input expression of type REAL) defines the X user coordinate where the
                   text string is to be drawn.

       PY          (an input expression of type REAL) defines the Y user coordinate where the
                   text string is to be drawn.

       CH          (an input constant or variable of type CHARACTER) is the text string to be
                   drawn.

       IS          (an input expression of type INTEGER) specifies the character width in plotter
                   address units (PAUs).

       IO          (an input expression of type INTEGER) specifies the rotation angle of the text
                   string.  IO is measured in degrees counter-clockwise from a horizontal
                   orientation.

       IC          (an input expression of type INTEGER) specifies the centering option, as
                   follows:

                   <0  (PX,PY) will be in the vertical center of the left edge of the leftmost
                       character in the original horizontal string.

                   =0  (PX,PY) will be in the center of the text extent rectangle.

                   >0  (PX,PY) will be in the vertical center of the right edge of the rightmost
                       character in the original horizontal string.

       A call to WTSTR causes the SPPS polyline buffer to be flushed and leaves the "pen" (for
       subsequent calls to FRSTPT, VECTOR, PLOTIF, and PLOTIT) at the location (PX,PY).

ACCESS

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

SEE ALSO

       Online: gtx, gstxal, gstxp, gstxfp, gschh, gschsp, gschup, gschxp, gscr, gstxci, spps,
       plotchar, plchhq, plchmq, plchlq, pwrit, plotif, seti, getsi

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

COPYRIGHT

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