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curve(3NCARG)


NAME

   CURVE - draws the curve defined by a specified series of points in the
   user coordinate system.  The "pen" (for subsequent calls to FRSTPT,
   VECTOR, PLOTIF, and PLOTIT) is left at the location of the last point
   in the curve.

SYNOPSIS

   CALL CURVE (PX,PY,NP)

C-BINDING SYNOPSIS

   #include <ncarg/ncargC.h>

   void c_curve (float *px, float *py, int np)

DESCRIPTION

   PX          (an input array of type REAL) defines the X user
               coordinates of the curve.  Array PX is of length NP.

   PY          (an input array of type REAL) defines the Y user
               coordinates of the curve.  Array PY is of length NP.

   NP          (an input expression of type INTEGER) specifies the number
               of points in the curve.

C-BINDING DESCRIPTION

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

USAGE

   If the routine SET was not called, or if it was called with a linear
   mapping in both the X and Y coordinates, then the GKS routine GPL is
   called to output a polyline of length NP points.  If the mapping in
   either axis is logarithmic, the input coordinates are transformed and
   drawn ten points at a time. (The last segment may be less than ten
   points.)

   Polyline type, line width, and color can also be set by calling the GKS
   routines GSLN, GSLWSC, GSCR, and GSPLCI, before calling CURVE.

EXAMPLES

   Use the ncargex command to see the following relevant examples: sfex01,
   sfex02, and tsoftf.

ACCESS

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

SEE ALSO

   Online: gpl, gsln, gslwsc, gscr, gsplci, frstpt, vector, plotif, line,
   spps, spps_params, ncarg_cbind

   Hardcopy: NCAR Graphics Fundamentals, UNIX Version User's Guide for
   NCAR GKS-0A Graphics; "The Use of X/Y Coordinates in NCAR Graphics" SCD
   User Document

COPYRIGHT

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



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