/usr/share/ncarg/hluex/contourplot/cn02c.c is in libncarg-data 6.4.0-9.
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* $Id: cn02c.c,v 1.9 2010-03-15 22:49:23 haley Exp $
*/
/************************************************************************
* *
* Copyright (C) 1993 *
* University Corporation for Atmospheric Research *
* All Rights Reserved *
* *
************************************************************************/
/*
* File: cn02c.c
*
* Author: David Brown
* National Center for Atmospheric Research
* PO 3000, Boulder, Colorado
*
* Date: Tue Oct 4 18:48:08 MDT 1994
*
* Description: Demonstrates basic features of the ContourPlot object
*/
#include <math.h>
#include <stdio.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>
static const int M=25, N=25;
int main(int argc, char *argv[])
{
float T[25 * 25];
ng_size_t len_dims[2];
int appid,wid,dataid,cnid;
int srlist,grlist;
float x,y;
int i,j;
float *fscales;
int *colors;
ng_size_t count;
int itmp;
char const *wks_type = "x11";
/* create a simple bull's eye pattern test data set */
#define PI 3.14159
for (i=-N/2;i<=N/2;i++) {
for (j=-M/2;j<=M/2;j++) {
x = 8.0 * i;
y = 8.0 * j;
*(T+(M*(i+N/2)+j+M/2)) =
100.0 - sqrt((double)(x*x + y*y));
}
}
/*
* Initialize the high level utility library
*/
NhlInitialize();
/*
* Create an application context. Set the app dir to the current directory
* so the application looks for a resource file in the working directory.
* In this example the resource file supplies the plot title only.
*/
srlist = NhlRLCreate(NhlSETRL);
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNappUsrDir,"./");
NhlCreate(&appid,"cn02",NhlappClass,NhlDEFAULT_APP,srlist);
if (!strcmp(wks_type,"ncgm") || !strcmp(wks_type,"NCGM")) {
/*
* Create a meta file workstation.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNwkMetaName,"./cn02c.ncgm");
NhlCreate(&wid,"cn02Work",
NhlncgmWorkstationClass,appid,srlist);
}
else if (!strcmp(wks_type,"x11") || !strcmp(wks_type,"X11")) {
/*
* Create an X workstation.
*/
NhlRLClear(srlist);
NhlRLSetInteger(srlist,NhlNwkPause,True);
NhlCreate(&wid,"cn02Work",NhlcairoWindowWorkstationClass,appid,srlist);
}
else if (!strcmp(wks_type,"oldps") || !strcmp(wks_type,"OLDPS")) {
/*
* Create an older-style PostScript workstation.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNwkPSFileName,"./cn02c.ps");
NhlCreate(&wid,"cn02Work",NhlpsWorkstationClass,appid,srlist);
}
else if (!strcmp(wks_type,"oldpdf") || !strcmp(wks_type,"OLDPDF")) {
/*
* Create an older-style PDF workstation.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNwkPDFFileName,"./cn02c.pdf");
NhlCreate(&wid,"cn02Work",NhlpdfWorkstationClass,appid,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,"./cn02c");
NhlRLSetString(srlist,NhlNwkFormat,(char*)wks_type);
NhlCreate(&wid,"cn02Work",NhlcairoDocumentWorkstationClass,appid,srlist);
}
else if (!strcmp(wks_type,"png") || !strcmp(wks_type,"PNG")) {
/*
* Create a cairo PNG workstation.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNwkFileName,"./cn02c");
NhlRLSetString(srlist,NhlNwkFormat,(char*)wks_type);
NhlCreate(&wid,"cn02Work",NhlcairoImageWorkstationClass,appid,srlist);
}
/*
* Create a ScalarField data object using the data set defined above.
* By default the array bounds will define the data boundaries (zero-based,
* as in C language conventions)
*/
NhlRLClear(srlist);
len_dims[0] = N;
len_dims[1] = M;
NhlRLSetMDFloatArray(srlist,NhlNsfDataArray,T,2,len_dims);
NhlCreate(&dataid,"bullseye",NhlscalarFieldClass,appid,
srlist);
/*
* Create a ContourPlot object, supplying the ScalarField object as data
*/
NhlRLClear(srlist);
NhlRLSetInteger(srlist,NhlNcnScalarFieldData,dataid);
NhlCreate(&cnid,"ContourPlot1",NhlcontourPlotClass,wid,srlist);
/*
* In the ContourPlot object, many resources that apply to the lines
* representing the contour levels and the fill areas between the levels
* have both a scalar and an array form. You control which applies by
* setting an associated boolean flag, identified by the prefix "Mono".
* As an illustration, set NhlNcnMonoLineDashPattern and NhlNcnMonoLineColor
* false to use a different line dash pattern and line color at each level.
* At the same time set the line thickness of all lines to twice the
* default thickness.
*/
NhlRLClear(srlist);
NhlRLSetFloat(srlist,NhlNcnLineThicknessF,2.0);
NhlRLSetString(srlist,NhlNcnMonoLineDashPattern,"false");
NhlRLSetString(srlist,NhlNcnMonoLineColor,"false");
NhlSetValues(cnid,srlist);
NhlDraw(cnid);
NhlFrame(wid);
/*
* Change back to a single solid line color and use pattern fill
*/
NhlRLClear(srlist);
NhlRLSetFloat(srlist,NhlNcnLineThicknessF,1.0);
NhlRLSetString(srlist,NhlNcnMonoLineDashPattern,"true");
NhlRLSetString(srlist,NhlNcnMonoLineColor,"true");
NhlRLSetString(srlist,NhlNcnFillOn,"true");
NhlRLSetString(srlist,NhlNcnMonoFillColor,"true");
NhlRLSetString(srlist,NhlNcnMonoFillPattern,"false");
NhlSetValues(cnid,srlist);
NhlDraw(cnid);
NhlFrame(wid);
/*
* Get the fill scale array to illustrate how you would modify the
* values of an array resource. By default all elements of this array
* are set to 1.0, resulting in each fill pattern appearing at its
* 'standard' size.
* The user is responsible for freeing the memory allocated for this array.
* Modify the array to range from sparse (2.5) at the low data values
* to dense (0.5) at high values, and set the new values, turning off
* the "mono" flag resource at the same time.
*/
grlist = NhlRLCreate(NhlGETRL);
NhlRLClear(grlist);
NhlRLGetFloatArray(grlist,NhlNcnFillScales,&fscales,&count);
NhlGetValues(cnid,grlist);
for (i = 0; i < count; i++) {
fscales[i] = 2.5 - 2.0 * i / (float) (count - 1);
}
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNcnMonoFillScale,"false");
NhlRLSetFloatArray(srlist,NhlNcnFillScales,fscales,count);
NhlSetValues(cnid,srlist);
NhlDraw(cnid);
NhlFrame(wid);
/*
* Use solid multi-colored fill instead of single-colored pattern fill.
* Using the scalar form of the line color resource, change the contour
* lines to use the background color.
*/
NhlRLClear(srlist);
NhlRLSetInteger(srlist,NhlNcnLineColor,NhlBACKGROUND);
NhlRLSetString(srlist,NhlNcnMonoFillColor,"false");
NhlRLSetString(srlist,NhlNcnMonoFillPattern,"true");
NhlSetValues(cnid,srlist);
NhlDraw(cnid);
NhlFrame(wid);
/*
* Invert the fill colors.
* First get the current array contents, reverse their order,
* then re-set the resource using the modified array. Note that the user
* is responsible for freeing the memory allocated for the array.
* Turn lines off altogether and also turn off the line and high/low labels.
*/
NhlRLClear(grlist);
NhlRLGetIntegerArray(grlist,NhlNcnFillColors,&colors,&count);
NhlGetValues(cnid,grlist);
for (i = 0; i < count / 2; i++) {
itmp = colors[i];
colors[i] = colors[count - 1 - i];
colors[count - 1 - i] = itmp;
}
NhlRLClear(srlist);
NhlRLSetIntegerArray(srlist,NhlNcnFillColors,colors,count);
NhlRLSetString(srlist,NhlNcnLinesOn,"false");
NhlRLSetString(srlist,NhlNcnLineLabelsOn,"false");
NhlRLSetString(srlist,NhlNcnHighLabelsOn,"false");
NhlRLSetString(srlist,NhlNcnLowLabelsOn,"false");
NhlSetValues(cnid,srlist);
NhlDraw(cnid);
NhlFrame(wid);
/*
* Destroy the objects created, close the HLU library and exit.
*/
NhlFree(fscales);
NhlFree(colors);
NhlDestroy(dataid);
NhlDestroy(cnid);
NhlDestroy(wid);
NhlDestroy(appid);
NhlClose();
exit(0);
}
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