/usr/share/ncarg/hluex/contourplot/cn12c.c is in libncarg-data 6.4.0-9.
This file is owned by root:root, with mode 0o644.
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* $Id: cn12c.c,v 1.5 2010-03-15 22:49:23 haley Exp $
*/
/************************************************************************
* *
* Copyright (C) 1995 *
* University Corporation for Atmospheric Research *
* All Rights Reserved *
* *
************************************************************************/
/*
* File: cn12c.c
*
* Author: Mary Haley
* National Center for Atmospheric Research
* PO 3000, Boulder, Colorado
*
* Date: Mon Oct 16 10:46:27 MDT 1995
*
* Description: This example emulates LLU example "cpex08". It
* draws a filled map with filled contours appearing in
* Africa. In order to mask Africa from the map fill, we
* use the mpMaskAreaSpecifiers resource and mask all of
* the countries in Africa.
*
*/
#include <stdio.h>
#include <math.h>
#include <ncarg/gks.h>
#include <ncarg/ncargC.h>
#include <ncarg/hlu/hlu.h>
/*
* Include a header file for each object created
*/
#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/ScalarField.h>
#include <ncarg/hlu/ContourPlot.h>
#include <ncarg/hlu/MapPlot.h>
#define M 40
#define N 40
/*
* Areas we want to fill.
*/
char *fill_specs[] = {"water","land"};
/*
* Areas we want to mask (countries of Africa).
*/
char *mask_specs[] = {
"algeria","angola","angola-exclave-called-cabinda","benin","botswana",
"burundi","cameroon","central-african-republic","chad","congo",
"djibouti","egypt","equatorial-guinea","ethiopia","gabon","gambia",
"ghana","guinea","guinea-bissau","ivory-coast","kenya","lesotho",
"liberia","libya","madagascar","malawi","mali","mauritania",
"mauritius","morocco","mozambique","namibia","niger","nigeria",
"rwanda","senegal","sierra-leone","somalia","south-africa","sudan",
"swaziland","tanzania","togo","tunisia","uganda","upper-volta",
"western-sahara","zaire","zambia","zimbabwe"};
int main(int argc, char *argv[])
{
int appid,wid,dataid,cnid,mpid;
int rlist;
float z[N*M];
ng_size_t len_dims[2];
extern void bndary();
extern void gendat (float *,int,int,int,int,int,float,float);
char const *wks_type = "x11";
/*
* Initialize the high level utility library
*/
NhlInitialize();
/*
* Create an application object.
*/
rlist = NhlRLCreate(NhlSETRL);
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNappUsrDir,"./");
NhlCreate(&appid,"cn12",NhlappClass,NhlDEFAULT_APP,rlist);
if (!strcmp(wks_type,"ncgm") || !strcmp(wks_type,"NCGM")) {
/*
* Create a meta file workstation.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNwkMetaName,"./cn12c.ncgm");
NhlCreate(&wid,"cn12Work",
NhlncgmWorkstationClass,NhlDEFAULT_APP,rlist);
}
else if (!strcmp(wks_type,"x11") || !strcmp(wks_type,"X11")) {
/*
* Create an X workstation.
*/
NhlRLClear(rlist);
NhlRLSetInteger(rlist,NhlNwkPause,True);
NhlCreate(&wid,"cn12Work",
NhlcairoWindowWorkstationClass,NhlDEFAULT_APP,rlist);
}
else if (!strcmp(wks_type,"oldps") || !strcmp(wks_type,"OLDPS")) {
/*
* Create an older-style PostScript workstation.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNwkPSFileName,"./cn12c.ps");
NhlCreate(&wid,"cn12Work",
NhlpsWorkstationClass,NhlDEFAULT_APP,rlist);
}
else if (!strcmp(wks_type,"oldpdf") || !strcmp(wks_type,"OLDPDF")) {
/*
* Create an older-style PDF workstation.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNwkPDFFileName,"./cn12c.pdf");
NhlCreate(&wid,"cn12Work",
NhlpdfWorkstationClass,NhlDEFAULT_APP,rlist);
}
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(rlist);
NhlRLSetString(rlist,NhlNwkFileName,"./cn12c");
NhlRLSetString(rlist,NhlNwkFormat,(char*)wks_type);
NhlCreate(&wid,"cn12Work",
NhlcairoDocumentWorkstationClass,NhlDEFAULT_APP,rlist);
}
else if (!strcmp(wks_type,"png") || !strcmp(wks_type,"PNG")) {
/*
* Create a cairo PNG workstation.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNwkFileName,"./cn12c");
NhlRLSetString(rlist,NhlNwkFormat,(char*)wks_type);
NhlCreate(&wid,"cn12Work",
NhlcairoImageWorkstationClass,NhlDEFAULT_APP,rlist);
}
/*
* Call the routine 'gendat' to create an array of contour data.
* Create a ScalarField data object and hand it the data created by
* 'gendat'.
*/
NhlRLClear(rlist);
len_dims[0] = N;
len_dims[1] = M;
gendat(z,M,M,N,15,15,-10.,110.);
NhlRLClear(rlist);
NhlRLSetMDFloatArray(rlist,NhlNsfDataArray,z,2,len_dims);
NhlRLSetFloat(rlist,NhlNsfXCStartV,-18.);
NhlRLSetFloat(rlist,NhlNsfXCEndV,52.);
NhlRLSetFloat(rlist,NhlNsfYCStartV,-35.);
NhlRLSetFloat(rlist,NhlNsfYCEndV,38.);
NhlCreate(&dataid,"DataPlot",NhlscalarFieldClass,appid,rlist);
/*
* Create a ContourPlot object using the above data field, and make sure
* the LabelBar is displayed.
*/
NhlRLClear(rlist);
NhlRLSetInteger(rlist,NhlNcnScalarFieldData,dataid);
NhlCreate(&cnid,"con1",NhlcontourPlotClass,wid,rlist);
/*
* Create a map object, specifying the areas we want filled and masked.
*/
NhlRLClear(rlist);
NhlRLSetFloat(rlist,NhlNvpXF,0.1);
NhlRLSetStringArray(rlist,NhlNmpMaskAreaSpecifiers,mask_specs,
NhlNumber(mask_specs));
NhlRLSetStringArray(rlist,NhlNmpFillAreaSpecifiers,fill_specs,
NhlNumber(fill_specs));
NhlRLSetString(rlist,NhlNpmLabelBarDisplayMode,"always");
NhlCreate(&mpid,"map",NhlmapPlotClass,wid,rlist);
NhlAddOverlay(mpid,cnid,-1);
NhlDraw(mpid);
NhlFrame(wid);
/*
* Destroy the workstation object and exit.
*/
NhlDestroy(wid);
NhlClose();
exit(0);
}
#define max(x,y) ((x) > (y) ? (x) : (y) )
#define min(x,y) ((x) < (y) ? (x) : (y) )
#define pow2(x) ((x)*(x))
void gendat (float *data,int idim,int m,int n,int mlow,int mhgh,float dlow,float dhgh)
{
/*
* This is a routine to generate test data for two-dimensional graphics
* routines. Given an array "DATA", dimensioned "IDIM x 1", it fills
* the sub-array ((DATA(I,J),I=1,M),J=1,N) with a two-dimensional field
* of data having approximately "MLOW" lows and "MHGH" highs, a minimum
* value of exactly "DLOW" and a maximum value of exactly "DHGH".
*
* "MLOW" and "MHGH" are each forced to be greater than or equal to 1
* and less than or equal to 25.
*
* The function used is a sum of exponentials.
*/
float ccnt[3][50], fovm, fovn, dmin, dmax, temp;
extern float fran();
int nlow, nhgh, ncnt, i, j, k, ii;
fovm=9./(float)m;
fovn=9./(float)n;
nlow=max(1,min(25,mlow));
nhgh=max(1,min(25,mhgh));
ncnt=nlow+nhgh;
for( k=1; k <= ncnt; k++ ) {
ccnt[0][k-1]=1.+((float)m-1.)*fran();
ccnt[1][k-1]=1.+((float)n-1.)*fran();
if (k <= nlow) {
ccnt[2][k-1]= -1.;
}
else {
ccnt[2][k-1] = 1.;
}
}
dmin = 1.e36;
dmax = -1.e36;
ii = 0;
for( j = 1; j <= n; j++ ) {
for( i = 1; i <= m; i++ ) {
data[ii]=.5*(dlow+dhgh);
for( k = 1; k <= ncnt; k++ ) {
temp = -(pow2((fovm*((float)(i)-ccnt[0][k-1])))+
pow2(fovn*((float)(j)-ccnt[1][k-1])));
if (temp >= -20.) data[ii]=data[ii]+.5*(dhgh-dlow)
*ccnt[2][k-1]*exp(temp);
}
dmin=min(dmin,data[ii]);
dmax=max(dmax,data[ii]);
ii++;
}
}
for( j = 0; j < m*n; j++ ) {
data[j]=(data[j]-dmin)/(dmax-dmin)*(dhgh-dlow)+dlow;
}
}
float rseq[] = { .749,.973,.666,.804,.081,.483,.919,.903,.951,.960,
.039,.269,.270,.756,.222,.478,.621,.063,.550,.798,.027,.569,
.149,.697,.451,.738,.508,.041,.266,.249,.019,.191,.266,.625,
.492,.940,.508,.406,.972,.311,.757,.378,.299,.536,.619,.844,
.342,.295,.447,.499,.688,.193,.225,.520,.954,.749,.997,.693,
.217,.273,.961,.948,.902,.104,.495,.257,.524,.100,.492,.347,
.981,.019,.225,.806,.678,.710,.235,.600,.994,.758,.682,.373,
.009,.469,.203,.730,.588,.603,.213,.495,.884,.032,.185,.127,
.010,.180,.689,.354,.372,.429 };
float fran()
{
static int iseq = 0;
iseq = (iseq % 100) + 1;
return(rseq[iseq-1]);
}
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