NAME

       WMDRRG  -  plots  weather  map regions (indicating "snow", "rain", etc.), or solid regions
       indicating temperature zones.

SYNOPSIS

       CALL WMDRRG(N,X,Y,ITYPE,NC,XC,YC)

C-BINDING SYNOPSIS

       #include <ncarg/gks.h>

       void c_wmdrrg(int n, float *x, float *y, char *itype, int nc, float *xc, float *yc)

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 region.

       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 region.

       ITYPE       (Character,  Input) - Indicates the weather type to fill the region with, or a
                   solid color.

                   ITYPE can be one of:

                           'T' for thunderstorms

                           'SH' for showers

                           'R' for rain

                           'F' for flurries

                           'SN' for snow

                           'I' for ice

                           'INDEXnn' where the number "nn" denotes a  color  index  for  a  solid
                          fill.

       NC          (Integer, input) - If NC is greater than 2, then the region resulting from the
                   spline fit to ((X(I),Y(I)),I=1,N)  will  be  clipped  against  the  region  in
                   ((XC(I),YC(I)),I=1,NC). If no clipping is to be done, then set NC equal to 1.

       XC          (Real,  Input)  -  The  X  coordinates  (specified in world coordinates) of NC
                   points that specify a clipping polygon  for  the  region  resulting  from  the
                   spline fit to ((X(I),Y(I)),I=1,N), if NC is greater than 2.

       YC          (Real,  Input)  -  The  Y  coordinates  (specified in world coordinates) of NC
                   points that specify a clipping polygon  for  the  region  resulting  from  the
                   spline fit to ((X(I),Y(I)),I=1,N), if NC is greater than 2.

USAGE

       Set  the  values  for the appropriate internal parameters before calling WMDRRG to produce
       the desired region. The internal parameters that control the appearance  of  regions  are:
       COL  and  RHT.   As  mentioned  above, the points specified in the X and Y arrays serve as
       control points for a spline curve that is fitted to the input polygon.  X(N) should  equal
       X(1) and Y(N) should equal Y(1).

ACCESS

       To use WMDRRG or c_wmdrrg, 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.