Section 3: library functions
FX – Given the X and Y coordinates of a point in the grid coordinate system, the function FX returns the X coordinate of the point in user coordinate space. FY – Given the X and Y coordinates of a point in the grid coordinate system, the function FY returns the Y coordinate of the…
FX – Given the X and Y coordinates of a point in the grid coordinate system, the function FX returns the X coordinate of the point in user coordinate space. FY – Given the X and Y coordinates of a point in the grid coordinate system, the function FY returns the Y coordinate of the…
FTITLE – Used for unscrolled movie or video titles. It reads, from standard input, the information necessary to define the desired title frames, and then calls STITLE to create those frames. SynopsisCALL FTITLE (MTST) C-Binding Synopsis#include <ncarg/ncargC.h> void c_ftitle (int mtst) DescriptionMTST (an input expression of type INTEGER) is a switch indicating whether this is…
FRSTPT – generates a "pen-up" move to a specified point in the user coordinate system. FRSTPT is used in conjunction with the routine VECTOR to draw lines. SynopsisCALL FRSTPT (PX,PY) C-Binding Synopsis#include <ncarg/ncargC.h> void c_frstpt (float px, float py) DescriptionPX (an input expression of type REAL) defines the X user coordinate. PY (an input expression…
FRSTD – Defines the first of a sequence of points through which a curve is to be drawn. SynopsisCALL FRSTD (X,Y) C-Binding Synopsis#include <ncarg/ncargC.h> void c_frstd (float x, float y) DescriptionX (an input expression of type REAL) defines the X user coordinate of the starting point of the curve. Y (an input expression of type…
FRST3 – Specifies the first in a sequence of points connected by straight-line segments, the projections of which are to be drawn. (FRST3 is called for the first point in the sequence and VECT3 is called for the rest.) SynopsisCALL FRST3 (U,V,W) C-Binding Synopsis#include <ncarg/ncargC.h> void c_FRST3 (float u, float v, float w) DescriptionU,V,W (input…
FRAME – advances to the next picture (in the case of CGM output), or pauses in the window of most recent creation (for X11 output). A mouse or key click in the window on pause will cause all active workstations to be cleared. SynopsisCALL FRAME C-Binding Synopsis#include <ncarg/ncargC.h> void c_frame() UsageIf a CGM workstation is…
FL2INT – converts X and Y coordinates from the User Coordinate System to the Metacode Coordinate System. StatusMetacode units are no longer used in NCAR Graphics; thus, FL2INT 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….
fitgrid_params – This document briefly describes all the internal parameters of Fitgrid. DescriptionEach entry below includes the name of a parameter, its Fortran type (use the obvious equivalents for C), its default value, and a short description of the parameter. ‘SIG’ – Real – 1. Value of the tension factor. ‘SL1’ – Real – 0….
Fitgrid is a package for interpolating one dimensional and two dimensional data. The package has the following functionality: 1.) Interpolating single-valued functions in one dimension. 2.) Interpolating parametric curves in the plane. 3.) Computing an interpolatory surface through a rectangular grid of functional values. 4.) Interpolating periodic functions in one dimension. 5.) Finding integrals and…
FENCE3 – Draws the projection of a curve, just as CURVE3 does, but with a "fence" of straight line segments that are parallel to one of the three axes and extend from the curve to a specified plane perpendicular to that axis. SynopsisCALL FENCE3 (U,V,W,N,IOREN,BOT) C-Binding Synopsis#include <ncarg/ncargC.h> void c_fence3 (float *u, float *v, float…
FDUM – A routine called when fatal errors occur. SynopsisCALL FDUM DescriptionThis routine is not intended to be called by the user. It is called by SETER when a fatal error is being processed and a STOP is about to be executed. The default version of FDUM does nothing. A user-supplied replacement version may take…
EZY – Draws, in a manner determined by the current values of the control parameters, a complete graph of a single curve through the points (I,YDRA(I)), for I from 1 to NPTS. The argument GLAB may be used to specify a "graph label", to be placed at the top of the graph. SynopsisCALL EZY (YDRA,NPTS,GLAB)…
EZXY – Draws, in a manner determined by the current values of the control parameters, a complete graph of a single curve through the points (XDRA(I),YDRA(I)), for I from 1 to NPTS. The argument GLAB may be used to specify a "graph label", to be placed at the top of the graph. SynopsisCALL EZXY (XDRA,YDRA,NPTS,GLAB)…
EZVEC – A front-end to VELVCT with a simpler interface. Like VELVCT, it plots a a vector field in a single call. SynopsisCALL EZVEC (U,V,M,N) StatusEZVEC is obsolete, and is supported only to provide compatibility with old NCAR Graphics codes. However, the compatibility mode parameter, CPM, offers a number of options to help ease the…
EZSTRM – A front-end to STRMLN with a simpler interface. Like STRMLN, it plots a streamline representation of field flow data in a single call. StatusEZSTRM is obsolete, and is supported only to provide compatibility with old NCAR Graphics codes. However, the compatibility mode parameter, CPM, offers a number of options to help ease the…
EZSRFC – Draws a perspective picture of a function of two variables with hidden lines removed. The function is approximated by a two-dimensional array of heights. Use EZSRFC only if the entire array is to be drawn, the data points are equally spaced in the X-Y plane, there are no stereo pairs, and scaling is…
EZMY – Draws, in a manner determined by the current values of the control parameters, a complete graph of one or more curves, each defined by a set of points (I,YDRA(I,J)) (or (I,YDRA(J,I)), depending on the current value of ‘ROW.’), for I from 1 to NPTS. The curve number J runs from 1 to MANY….
EZMXY – Draws, in a manner determined by the current values of the control parameters, a complete graph of one or more curves, each defined by a set of points (XDRA(I),YDRA(I,J)) (or (XDRA(I),YDRA(J,I)) or (XDRA(I,J),YDRA(I,J)) or (XDRA(J,I),YDRA(J,I)), depending on the current value of ‘ROW.’), for I from 1 to NPTS. The curve number J runs…
EZMAP – Allows one to plot maps of the earth according to any of ten different projections, with parallels, meridians, and continental, international, and/or U.S. state outlines. EZMAPA is the name of a supplement to the EZMAP utility that allows users to produce solid-filled maps of the earth. The EZMAPA routines are discussed as part…