/usr/share/ncarg/hluex/contourplot/cn05c.c is in libncarg-data 6.4.0-9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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** $Id: cn05c.c,v 1.9 2010-03-15 22:49:23 haley Exp $
*/
/***********************************************************************
* *
* Copyright (C) 1995 *
* University Corporation for Atmospheric Research *
* The use of this Software is governed by a License Agreement *
* *
***********************************************************************/
/*
** File: cn05c.c
**
** Author: Tim Scheitln (converted to C by Mary Haley)
** National Center for Atmospheric Research
** PO 3000, Boulder, Colorado
**
** Date: Tue Sep 26 09:44:01 MDT 1995
**
** Description: Demonstrates how to create a map plot animation with a
** contour overlay and labelbar annotation.
**
*/
#include <stdio.h>
#include <math.h>
#include <ncarg/hlu/hlu.h>
#include <ncarg/hlu/ResList.h>
#include <ncarg/hlu/App.h>
#include <ncarg/hlu/NcgmWorkstation.h>
#include <ncarg/hlu/PSWorkstation.h>
#include <ncarg/hlu/PDFWorkstation.h>
#include <ncarg/hlu/CairoWorkstation.h>
#include <ncarg/hlu/ContourPlot.h>
#include <ncarg/hlu/MapPlot.h>
#include <ncarg/hlu/ScalarField.h>
#include <netcdf.h>
/*
* The PLOT_ALL_DATA flag controls whether or not all 31 days of data is
* read and plotted. Setting the flag to 1 will cause this script to
* plot 31 frames. Otherwise, the script will read only 3 days worth of
* data and plot 3 frames.
*/
#define PLOT_ALL_DATA 0
/*
* Define the maximum number of colors.
*/
#define NCOLORS 64
int main()
{
/*
* Declare variables for the HLU routine calls.
*/
int appid, workid, field1, con1;
int mapid, lb1id, lb2id;
int srlist, i, day;
ng_size_t icount[2];
/*
* Declare variables for defining color map.
*/
ng_size_t length[2];
float cmap[NCOLORS][3];
extern void gen_colormap();
/*
* Create an array that will contain the indices into the
* colormap defined later.
*/
int fillindices[NCOLORS-2];
/*
* Declare variables for getting information from netCDF file.
*/
int ncid, t_id, lon_id, lat_id, time_id;
float T[40][49];
int lon[49], lat[40];
long start[3], count[3], lonlen, latlen, nframes;
char filename[256], daystr[10];
const char *dir = _NGGetNCARGEnv("data");
/*
* Default is to create an NCGM file.
*/
char const *wks_type = "ncgm";
/*
* Open the netCDF file.
*/
sprintf( filename, "%s/cdf/meccatemp.cdf", dir );
ncid = ncopen(filename,NC_NOWRITE);
/*
* Initialize the HLU library and set up resource template.
*/
NhlInitialize();
srlist = NhlRLCreate(NhlSETRL);
/*
* Create Application object.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNappDefaultParent,"True");
NhlRLSetString(srlist,NhlNappUsrDir,"./");
NhlCreate(&appid,"cn05",NhlappClass,NhlDEFAULT_APP,srlist);
if (!strcmp(wks_type,"ncgm") || !strcmp(wks_type,"NCGM")) {
/*
* Create a meta file object.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNwkMetaName,"./cn05c.ncgm");
NhlCreate(&workid,"cn05Work",NhlncgmWorkstationClass,
NhlDEFAULT_APP,srlist);
}
else if (!strcmp(wks_type,"x11") || !strcmp(wks_type,"X11")) {
/*
* Create an X11 workstation.
*/
NhlRLClear(srlist);
NhlRLSetInteger(srlist,NhlNwkPause,True);
NhlCreate(&workid,"cn05Work",NhlcairoWindowWorkstationClass,
NhlDEFAULT_APP,srlist);
}
else if (!strcmp(wks_type,"oldps") || !strcmp(wks_type,"OLDPS")) {
/*
* Create an older-style PostScript workstation.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNwkPSFileName,"./cn05c.ps");
NhlCreate(&workid,"cn05Work",NhlpsWorkstationClass,
NhlDEFAULT_APP,srlist);
}
else if (!strcmp(wks_type,"oldpdf") || !strcmp(wks_type,"OLDPDF")) {
/*
* Create an older-style PDF workstation.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNwkPDFFileName,"./cn05c.pdf");
NhlCreate(&workid,"cn05Work",NhlpdfWorkstationClass,
NhlDEFAULT_APP,srlist);
}
else if (!strcmp(wks_type,"pdf") || !strcmp(wks_type,"PDF") ||
!strcmp(wks_type,"ps") || !strcmp(wks_type,"PS")) {
/*
* Create a cairo PS/PDF workstation.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNwkFileName,"./cn05c");
NhlRLSetString(srlist,NhlNwkFormat,(char*)wks_type);
NhlCreate(&workid,"cn05Work",NhlcairoDocumentWorkstationClass,
NhlDEFAULT_APP,srlist);
}
else if (!strcmp(wks_type,"png") || !strcmp(wks_type,"PNG")) {
/*
* Create a cairo PNG workstation.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNwkFileName,"./cn05c");
NhlRLSetString(srlist,NhlNwkFormat,(char*)wks_type);
NhlCreate(&workid,"cn05Work",NhlcairoImageWorkstationClass,
NhlDEFAULT_APP,srlist);
}
/*
* Generate a colormap.
*/
gen_colormap(cmap);
/*
* Assign the colormap to the workstation.
*/
length[0] = NCOLORS; length[1] = 3;
NhlRLClear(srlist);
NhlRLSetMDFloatArray(srlist,NhlNwkColorMap,&cmap[0][0],2,length);
NhlSetValues(workid,srlist);
/*
* Get the temperature and lat/lon dimensions.
*/
lat_id = ncdimid(ncid,"lat");
lon_id = ncdimid(ncid,"lon");
t_id = ncvarid(ncid,"t");
ncdiminq(ncid,lat_id,(char *)0,&latlen);
ncdiminq(ncid,lon_id,(char *)0,&lonlen);
lat_id = ncvarid(ncid,"lat");
lon_id = ncvarid(ncid,"lon");
/*
* Get temperature and lat/lon values.
*/
start[0] = start[1] = start[2] = 0;
count[0] = 1; count[1] = latlen; count[2] = lonlen;
ncvarget(ncid,t_id,(long const *)start,(long const *)count,T);
count[0] = latlen;
ncvarget(ncid,lat_id,(long const *)start,(long const *)count,lat);
count[0] = lonlen;
ncvarget(ncid,lon_id,(long const *)start,(long const *)count,lon);
/*
* Create a scalar field object that will be used as the
* dataset for the contour object.
*/
icount[0] = latlen; icount[1] = lonlen;
NhlRLClear(srlist);
NhlRLSetMDFloatArray(srlist,NhlNsfDataArray,&T[0][0],2,icount);
NhlRLSetInteger(srlist,NhlNsfXCStartV,lon[0]);
NhlRLSetInteger(srlist,NhlNsfXCEndV,lon[lonlen-1]);
NhlRLSetInteger(srlist,NhlNsfYCStartV,lat[0]);
NhlRLSetInteger(srlist,NhlNsfYCEndV,lat[latlen-1]);
NhlCreate(&field1,"field1",NhlscalarFieldClass,appid,srlist);
/*
* Assign the indices, skipping the first two colormap entries
* that contain the default background and foreground color.
*/
for( i = 0; i < NCOLORS-2; i++ ) fillindices[i] = i+2;
/*
* Create a ContourPlot object.
*/
NhlRLClear(srlist);
/*
* Assign the data that was read earlier.
*/
NhlRLSetInteger(srlist,NhlNcnScalarFieldData,field1);
/*
* Assign the colormap fill indices
*/
NhlRLSetIntegerArray(srlist,NhlNcnFillColors,fillindices,NCOLORS-2);
/*
* Set the range and spacing of the contour levels.
*/
NhlRLSetString(srlist,NhlNcnLevelSelectionMode, "ManualLevels");
NhlRLSetFloat(srlist,NhlNcnMinLevelValF,195.0);
NhlRLSetFloat(srlist,NhlNcnMaxLevelValF,328.0);
NhlRLSetFloat(srlist,NhlNcnLevelSpacingF,2.25);
/*
* Turn on contour fills.
*/
NhlRLSetString(srlist,NhlNcnFillOn,"True");
/*
* Turn off the contour lines and labels.
*/
NhlRLSetString(srlist,NhlNcnLinesOn,"False");
NhlRLSetString(srlist,NhlNcnLineLabelsOn,"False");
NhlRLSetString(srlist,NhlNcnHighLabelsOn,"False");
NhlRLSetString(srlist,NhlNcnLowLabelsOn,"False");
NhlRLSetString(srlist,NhlNcnInfoLabelOn,"False");
/*
* Turn on the overlay labelbar.
*/
NhlRLSetString(srlist,NhlNpmLabelBarDisplayMode,"ALWAYS");
/*
* Set the labelbar size
*/
NhlRLSetFloat(srlist,NhlNpmLabelBarHeightF,0.15);
NhlRLSetFloat(srlist,NhlNpmLabelBarWidthF,0.6);
/*
* Set the location and orientation of the labelbar.
*/
NhlRLSetString(srlist,NhlNpmLabelBarSide,"bottom");
NhlRLSetString(srlist,NhlNlbOrientation,"horizontal");
/*
* Set the lablebar title, font, and color.
*/
NhlRLSetString(srlist,NhlNlbTitleString,"Day 1");
NhlRLSetInteger(srlist,NhlNlbTitleFont,22);
NhlRLSetString(srlist,NhlNlbTitleFontColor,"PaleGreen4");
/*
* Turn off the labelbar perimeter box
*/
NhlRLSetString(srlist,NhlNlbPerimOn,"False");
/*
* Turn off lines that separate each color in the labelbar.
*/
NhlRLSetInteger(srlist,NhlNlbBoxLinesOn,0);
/*
* Turn off labelbar labels
*/
NhlRLSetString(srlist,NhlNlbLabelsOn,"False");
NhlCreate(&con1,"con1",NhlcontourPlotClass,workid,srlist);
/*
* Create map object.
*/
NhlRLClear(srlist);
/*
* Allow the map to be stretched along
* the horizontal and vertical view axes.
*/
NhlRLSetString(srlist,NhlNmpShapeMode,"FreeAspect");
/*
* Set the viewport position and size. This will
* stretch the map along its axes.
*/
NhlRLSetFloat(srlist,NhlNvpXF,0.03);
NhlRLSetFloat(srlist,NhlNvpYF,0.90);
NhlRLSetFloat(srlist,NhlNvpWidthF,0.94);
NhlRLSetFloat(srlist,NhlNvpHeightF,0.68);
/*
* Set the center of projection.
*/
NhlRLSetFloat(srlist,NhlNmpCenterLatF,0.0);
NhlRLSetFloat(srlist,NhlNmpCenterLonF,150.0);
/*
* Set the projection type.
*/
NhlRLSetString(srlist,NhlNmpProjection,"CYLINDRICALEQUIDISTANT");
/*
* Turn off grid and limb lines, labels, and permimeter.
*/
NhlRLSetString(srlist,NhlNmpGridAndLimbOn,"False");
NhlRLSetString(srlist,NhlNmpLabelsOn,"False");
NhlRLSetString(srlist,NhlNmpPerimOn,"False");
/*
* Turn on main title and set its value, font, and color.
*/
NhlRLSetString(srlist,NhlNpmTitleDisplayMode,"Always");
NhlRLSetString(srlist,NhlNtiMainString,
"January Global Surface Temperature");
NhlRLSetInteger(srlist,NhlNtiMainFont,22);
NhlRLSetString(srlist,NhlNtiMainFontColor,"PaleGreen4");
NhlCreate(&mapid,"map",NhlmapPlotClass,workid,srlist);
NhlAddOverlay(mapid,con1,-1);
/*
* Create two labels (high and low values) for labelbar.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNtxString,"195 K");
NhlRLSetFloat(srlist,NhlNtxPosXF,0.05);
NhlRLSetFloat(srlist,NhlNtxPosYF,0.03);
NhlRLSetInteger(srlist,NhlNtxFont,22);
NhlRLSetString(srlist,NhlNtxFontColor,"PaleGreen4");
NhlRLSetFloat(srlist,NhlNtxFontHeightF,0.03);
NhlRLSetString(srlist,NhlNtxJust,"CENTERLEFT");
NhlCreate(&lb1id,"lbarlo",NhltextItemClass,workid,srlist);
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNtxString,"328 K");
NhlRLSetFloat(srlist,NhlNtxPosXF,0.85);
NhlRLSetFloat(srlist,NhlNtxPosYF,0.03);
NhlRLSetInteger(srlist,NhlNtxFont,22);
NhlRLSetString(srlist,NhlNtxFontColor,"PaleGreen4");
NhlRLSetFloat(srlist,NhlNtxFontHeightF,0.03);
NhlRLSetString(srlist,NhlNtxJust,"CENTERLEFT");
NhlCreate(&lb2id,"lbarhi",NhltextItemClass,workid,srlist);
/*
* Draw all objects.
*/
printf("Plotting Day 1\n");
NhlDraw(mapid);
NhlDraw(lb1id);
NhlDraw(lb2id);
NhlFrame(workid);
/*
* Loop on remaining time steps
*/
if ( !PLOT_ALL_DATA ) {
nframes=2;
}
else {
time_id = ncdimid(ncid,"time");
ncdiminq(ncid,time_id,(char *)0,&nframes);
nframes--;
}
for( i = 1; i <= nframes; i++ ) {
printf("Plotting Day %d\n", i+1);
/*
* Read the next data field (next day).
*/
start[0] = i; start[1] = start[2] = 0;
count[0] = 1; count[1] = latlen; count[2] = lonlen;
ncvarget(ncid,t_id,(long const *)start,(long const *)count,T);
icount[0] = latlen; icount[1] = lonlen;
NhlRLClear(srlist);
NhlRLSetMDFloatArray(srlist,NhlNsfDataArray,&T[0][0],2,icount);
NhlSetValues(field1,srlist);
/*
* Increment day string.
*/
day = i+1;
sprintf( daystr, "Day %d", day );
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNlbTitleString,daystr);
NhlSetValues(con1,srlist);
/*
* Draw another plot.
*/
NhlDraw(mapid);
NhlDraw(lb1id);
NhlDraw(lb2id);
NhlFrame(workid);
}
if( !PLOT_ALL_DATA ) {
printf("To plot all 31 days in this animation, edit the NCL\n");
printf("script, and set the PLOT_ALL_DATA flag to TRUE.\n");
}
/*
* Close the netCDF file.
*/
ncclose(ncid);
/*
* NhlDestroy destroys the given id and all of its children.
*/
NhlRLDestroy(srlist);
NhlDestroy(appid);
/*
* Restores state.
*/
NhlClose();
exit(0);
}
/*
* This procedure explicitly sets the red, green, and blue
* intensities for each element in a colormap array.
*/
void gen_colormap( float cmap[NCOLORS][3] )
{
/*
* Set the color map.
*/
cmap[63][0] = 1.00; cmap[63][1] = .000; cmap[63][2] = .000;
cmap[62][0] = 1.00; cmap[62][1] = .000; cmap[62][2] = .000;
cmap[61][0] = .990; cmap[61][1] = .000; cmap[61][2] = .000;
cmap[60][0] = .950; cmap[60][1] = .010; cmap[60][2] = .000;
cmap[59][0] = .900; cmap[59][1] = .030; cmap[59][2] = .000;
cmap[58][0] = .870; cmap[58][1] = .050; cmap[58][2] = .000;
cmap[57][0] = .830; cmap[57][1] = .070; cmap[57][2] = .000;
cmap[56][0] = .800; cmap[56][1] = .090; cmap[56][2] = .000;
cmap[55][0] = .750; cmap[55][1] = .090; cmap[55][2] = .000;
cmap[54][0] = .700; cmap[54][1] = .090; cmap[54][2] = .000;
cmap[53][0] = .700; cmap[53][1] = .100; cmap[53][2] = .000;
cmap[52][0] = .700; cmap[52][1] = .120; cmap[52][2] = .000;
cmap[51][0] = .700; cmap[51][1] = .130; cmap[51][2] = .000;
cmap[50][0] = .700; cmap[50][1] = .180; cmap[50][2] = .000;
cmap[49][0] = .700; cmap[49][1] = .240; cmap[49][2] = .000;
cmap[48][0] = .700; cmap[48][1] = .260; cmap[48][2] = .000;
cmap[47][0] = .700; cmap[47][1] = .270; cmap[47][2] = .000;
cmap[46][0] = .700; cmap[46][1] = .285; cmap[46][2] = .000;
cmap[45][0] = .690; cmap[45][1] = .300; cmap[45][2] = .000;
cmap[44][0] = .680; cmap[44][1] = .330; cmap[44][2] = .000;
cmap[43][0] = .675; cmap[43][1] = .375; cmap[43][2] = .000;
cmap[42][0] = .570; cmap[42][1] = .420; cmap[42][2] = .000;
cmap[41][0] = .565; cmap[41][1] = .485; cmap[41][2] = .000;
cmap[40][0] = .560; cmap[40][1] = .530; cmap[40][2] = .000;
cmap[39][0] = .555; cmap[39][1] = .545; cmap[39][2] = .000;
cmap[38][0] = .550; cmap[38][1] = .550; cmap[38][2] = .000;
cmap[37][0] = .160; cmap[37][1] = .565; cmap[37][2] = .000;
cmap[36][0] = .130; cmap[36][1] = .570; cmap[36][2] = .000;
cmap[35][0] = .100; cmap[35][1] = .575; cmap[35][2] = .000;
cmap[34][0] = .060; cmap[34][1] = .680; cmap[34][2] = .000;
cmap[33][0] = .030; cmap[33][1] = .685; cmap[33][2] = .000;
cmap[32][0] = .000; cmap[32][1] = .690; cmap[32][2] = .000;
cmap[31][0] = .000; cmap[31][1] = .725; cmap[31][2] = .000;
cmap[30][0] = .000; cmap[30][1] = .700; cmap[30][2] = .100;
cmap[29][0] = .000; cmap[29][1] = .650; cmap[29][2] = .200;
cmap[28][0] = .000; cmap[28][1] = .600; cmap[28][2] = .300;
cmap[27][0] = .000; cmap[27][1] = .550; cmap[27][2] = .400;
cmap[26][0] = .000; cmap[26][1] = .500; cmap[26][2] = .500;
cmap[25][0] = .000; cmap[25][1] = .450; cmap[25][2] = .600;
cmap[24][0] = .000; cmap[24][1] = .400; cmap[24][2] = .700;
cmap[23][0] = .000; cmap[23][1] = .350; cmap[23][2] = .700;
cmap[22][0] = .000; cmap[22][1] = .300; cmap[22][2] = .700;
cmap[21][0] = .000; cmap[21][1] = .250; cmap[21][2] = .700;
cmap[20][0] = .000; cmap[20][1] = .200; cmap[20][2] = .700;
cmap[19][0] = .000; cmap[19][1] = .150; cmap[19][2] = .700;
cmap[18][0] = .000; cmap[18][1] = .100; cmap[18][2] = .700;
cmap[17][0] = .000; cmap[17][1] = .050; cmap[17][2] = .700;
cmap[16][0] = .000; cmap[16][1] = .000; cmap[16][2] = .700;
cmap[15][0] = .050; cmap[15][1] = .050; cmap[15][2] = .700;
cmap[14][0] = .100; cmap[14][1] = .100; cmap[14][2] = .700;
cmap[13][0] = .150; cmap[13][1] = .150; cmap[13][2] = .700;
cmap[12][0] = .200; cmap[12][1] = .200; cmap[12][2] = .700;
cmap[11][0] = .250; cmap[11][1] = .250; cmap[11][2] = .700;
cmap[10][0] = .300; cmap[10][1] = .300; cmap[10][2] = .700;
cmap[ 9][0] = .350; cmap[ 9][1] = .350; cmap[ 9][2] = .700;
cmap[ 8][0] = .420; cmap[ 8][1] = .400; cmap[ 8][2] = .700;
cmap[ 7][0] = .450; cmap[ 7][1] = .450; cmap[ 7][2] = .700;
cmap[ 6][0] = .560; cmap[ 6][1] = .500; cmap[ 6][2] = .700;
cmap[ 5][0] = .550; cmap[ 5][1] = .550; cmap[ 5][2] = .700;
cmap[ 4][0] = .610; cmap[ 4][1] = .600; cmap[ 4][2] = .700;
cmap[ 3][0] = .650; cmap[ 3][1] = .650; cmap[ 3][2] = .700;
cmap[ 2][0] = .700; cmap[ 2][1] = .700; cmap[ 2][2] = .700;
/*
* Entry 1 is the foreground color.
* The continental outlines in the map object use this color
* as a default.
*/
cmap[ 1][0] = .000; cmap[ 1][1] = .000; cmap[ 1][2] = .000;
/*
* Entry 0 is the background color.
*/
cmap[ 0][0] = .000; cmap[ 0][1] = .000; cmap[ 0][2] = .000;
}
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