NAME

       MXMY - Retrieves the current pen position in the Plotter Address Unit (PAU) coordinate
       system.

STATUS

       Plotter Address Units (PAUs) are not being used in new NCAR Graphics routines; thus, MXMY
       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.

       MXMY continues to be provided for compatibility of early NCAR Graphics codes.  Frequently,
       consecutive calls to FRSTPT and MXMY were used to effectively convert from user
       coordinates to plotter coordinates; for this purpose, the functions KUPX and KUPY may be
       used instead.  If you are writing new code, you could keep track of the pen location
       through internal bookkeeping.  Better, though, would be to use fractional coordinates for
       the purposes to which plotter coordinates were put; the functions CFUX, CFUY, CUFX, and
       CUFY allow for conversions between user coordinates and fractional coordinates.

       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 routine SETI and retrieved by
       routine GETSI.

SYNOPSIS

       CALL MXMY (IX,IY)

DESCRIPTION

       IX          (an output variable of type INTEGER) is the X coordinate of the pen position
                   in PAUs.

       IY          (an output variable of type INTEGER) is the Y coordinate of the pen position
                   in PAUs.

USAGE

       The routines CURVE, FRSTPT, LINE, PLOTIF, PLOTIT, POINT, POINTS, and VECTOR update the pen
       position for subsequent MXMY retrieval.  ALso, the routines PWRIT and WTSTR leave the pen
       position at the location specified by their first two arguments.

ACCESS

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

SEE ALSO

       Online: curve, frstpt, line, plotit, point, points, pwrit, vector, seti, getsi, cpfx,
       cpfy, cpux, cpuy, kfpx, kfpy, kpmx, kpmy, kmpx, kmpy, kupx, kupy, spps, spps_converters

       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.