/usr/share/ncarg/hluex/xyplot/xy05c.c is in libncarg-data 6.4.0-9.
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** $Id: xy05c.c,v 1.17 2010-03-15 22:49:25 haley Exp $
*/
/**********************************************************************
* *
* Copyright (C) 1995 *
* University Corporation for Atmospheric Research *
* All Rights Reserved *
* *
**********************************************************************/
/*
** File: xy05c.c
**
** Author: Mary Haley
** National Center for Atmospheric Research
** PO 3000, Boulder, Colorado
**
** Date: Thu Jan 26 13:44:45 MST 1995
**
** Description: This example shows one way on how to create an
** XyPlot object with multiple lines using the
** CoordArrTable object. Some of the XyPlot line
** resources are tweaked to show how to change the
** appearances of the lines.
**
** The "CoordArrTable" object is used to set up the
** data. (The Fortran and NCL version of this example
** uses "CoordArrays" since "CoordArrTable" is not
** available).
**
*/
#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/XyPlot.h>
#include <ncarg/hlu/CoordArrTable.h>
#define NCURVE 10
#define NPTS 100
#define NCOLORS 12
#define PI 3.14159
/*
* Create data arrays for XyPlot object.
*/
float *y[NCURVE];
int length[NCURVE];
int main()
{
int appid,xworkid,plotid,dataid;
int rlist, i, j;
ng_size_t len[2];
float cmap[NCOLORS][3];
char const *wks_type = "x11";
/*
* Initialize the HLU library and set up resource template
*/
NhlInitialize();
rlist = NhlRLCreate(NhlSETRL);
/*
* Modify the color map. Color indices '0' and '1' are the background
* and foreground colors respectively.
*/
cmap[0][0] = 0.00; cmap[0][1] = 0.00; cmap[0][2] = 0.00;
cmap[1][0] = 1.00; cmap[1][1] = 1.00; cmap[1][2] = 1.00;
cmap[2][0] = 0.00; cmap[2][1] = 0.00; cmap[2][2] = 1.00;
cmap[3][0] = 0.00; cmap[3][1] = 1.00; cmap[3][2] = 0.00;
cmap[4][0] = 0.00; cmap[4][1] = 1.00; cmap[4][2] = 0.75;
cmap[5][0] = 0.50; cmap[5][1] = 0.50; cmap[5][2] = 0.63;
cmap[6][0] = 1.00; cmap[6][1] = 0.00; cmap[6][2] = 0.00;
cmap[7][0] = 0.75; cmap[7][1] = 0.38; cmap[7][2] = 0.25;
cmap[8][0] = 0.75; cmap[8][1] = 0.00; cmap[8][2] = 0.75;
cmap[9][0] = 1.00; cmap[9][1] = 0.38; cmap[9][2] = 0.38;
cmap[10][0] = 1.00; cmap[10][1] = 0.83; cmap[10][2] = 0.00;
cmap[11][0] = 1.00; cmap[11][1] = 1.00; cmap[11][2] = 0.00;
len[0] = NCOLORS; len[1] = 3;
/*
* Create Application object. The Application object name is used to
* determine the name of the resource file, which is "xy05.res" in this
* case.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNappDefaultParent,"True");
NhlRLSetString(rlist,NhlNappUsrDir,"./");
NhlCreate(&appid,"xy05",NhlappClass,NhlDEFAULT_APP,rlist);
if (!strcmp(wks_type,"ncgm") || !strcmp(wks_type,"NCGM")) {
/*
* Create a meta file object.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNwkMetaName,"./xy05c.ncgm");
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,len);
NhlCreate(&xworkid,"xy05Work",NhlncgmWorkstationClass,
NhlDEFAULT_APP,rlist);
}
else if (!strcmp(wks_type,"x11") || !strcmp(wks_type,"X11")) {
/*
* Create an X11 workstation.
*/
NhlRLClear(rlist);
NhlRLSetInteger(rlist,NhlNwkPause,True);
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,len);
NhlCreate(&xworkid,"xy05Work",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,"./xy05c.ps");
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,len);
NhlCreate(&xworkid,"xy05Work",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,"./xy05c.pdf");
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,len);
NhlCreate(&xworkid,"xy05Work",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,"./xy05c");
NhlRLSetString(rlist,NhlNwkFormat, (char*)wks_type);
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,len);
NhlCreate(&xworkid,"xy05Work",NhlcairoDocumentWorkstationClass,
NhlDEFAULT_APP,rlist);
}
else if (!strcmp(wks_type,"png") || !strcmp(wks_type,"PNG")) {
/*
* Create a cairo PNG workstation.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNwkFileName,"./xy05c");
NhlRLSetString(rlist,NhlNwkFormat, (char*)wks_type);
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,len);
NhlCreate(&xworkid,"xy05Work",NhlcairoImageWorkstationClass,
NhlDEFAULT_APP,rlist);
}
/*
* Initialize data.
*/
for( j = 0; j < NCURVE; j++ ) {
length[j] = NPTS - j*10;
y[j] = (float *)malloc(sizeof(float)*length[j]);
if (y[j] == NULL) {
NhlPError(NhlFATAL,NhlEUNKNOWN,
"Unable to malloc space for y array");
exit(3);
}
for( i = 0; i < length[j]; i++ ) {
y[j][i] = (float)(j+1)*sin((float)(2.*i*PI)/(float)(length[j]-1));
}
}
/*
* Create the CoordArrTable object which defines the data for the
* XyPlot object. The id from this object will become the value for
* the XyPlot resource, "xyCoordData".
*/
NhlRLClear(rlist);
NhlRLSetIntegerArray(rlist,NhlNctYTableLengths,length,NCURVE);
NhlRLSetArray(rlist,NhlNctYTable,y,NhlTPointer,sizeof(NhlPointer),
NCURVE);
NhlCreate(&dataid,"xyData",NhlcoordArrTableClass,
NhlDEFAULT_APP,rlist);
/*
* Create the XyPlot object and tweak some of the tickmark, title and
* view port resources (some in the "xy05.res" resource file).
*/
NhlRLClear(rlist);
NhlRLSetInteger(rlist,NhlNxyCoordData,dataid);
NhlCreate(&plotid,"xyPlot",NhlxyPlotClass,xworkid,rlist);
/*
* Draw the plot.
*/
NhlDraw(plotid);
NhlFrame(xworkid);
/*
* NhlDestroy destroys the given id and all of its children
* so destroying "appid" will destroy "xworkid" which will also destroy
* "plotid".
*/
NhlRLDestroy(rlist);
NhlDestroy(appid);
/*
* Restores state.
*/
NhlClose();
exit(0);
}
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