NAME

       WMDRFT - plots weather map front lines.

SYNOPSIS

       CALL WMDRFT (N, X, Y)

C-BINDING SYNOPSIS

       #include <ncarg/gks.h>

       void c_wmdrft(int n, float *x, float *y)

DESCRIPTION

       N           (Integer,  Input)  -  The  number  of  points supplied in the second and third
                   arguments.

       X           (Real, Input) - The X coordinates   (specified  in  world  coordinates)  of  N
                   points  that  specify the control points of a spline curve that will be fitted
                   to represent the requested weather front.

       Y           (Real, Input) - The Y coordinates   (specified  in  world  coordinates)  of  N
                   points  that  specify the control points of a spline curve that will be fitted
                   to represent the requested weather front.

USAGE

       Set the values for the appropriate internal parameters before calling  WMDRFT  to  produce
       the desired weather front.  The internal parameters that control the appearance of weather
       fronts are: ALO, ARC, BEG, BET, CFC, CS1, CS2, COL, DWD, END, FRO,  LIN,  NBZ,  NMS,  PAI,
       REV, SL1, SL2, SLF, STY, SWI, T1C, T2C, WFC, and WTY.  The possible fronts are: warm, warm
       aloft, cold,  cold  aloft,  stationary,  stationary  aloft,  occluded,  convergence  line,
       instability  line, intertropical.  As mentioned above, the points specified in the X and Y
       arrays serve as control points for a spline curve that is fitted  between  the  first  and
       last  point.   The  spline  passes through the given points.  If the desired front line is
       reasonably smooth, then only a few input points need be specified.

ACCESS

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

SEE ALSO

       Online: wmap, wmdflt, wmgetc, wmgeti, wmgetr, wmsetc, wmseti, wmsetr, wmap_params

       Hardcopy:  WMAP  -  A  Package for Producing Daily Weather Maps and Plotting Station Model
       Data

COPYRIGHT

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