/usr/share/ncarg/hluex/contourplot/cn17c.c is in libncarg-data 6.4.0-9.
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* $Id: cn17c.c,v 1.6 2010-03-15 22:49:23 haley Exp $
*/
/***********************************************************************
* *
* Copyright (C) 1997 *
* University Corporation for Atmospheric Research *
* The use of this Software is governed by a License Agreement *
* *
************************************************************************
*
* File: cn17c.c
*
*
* Author: Mary Haley
* (original LLU example by Dave Kennison)
* National Center for Atmospheric Research
* PO Box 3000, Boulder, Colorado
*
* Date: Fri Apr 25 11:25:21 MST 1997
*
* Description: This example is somewhat similar to the LLU example
* "cpex10", which draws contours bands within a circle
* on a satellite map projection. It also shows how to
* use the NhlDataPolyline and NhlDataPolymarker routines
* to draw lines and markers on a map projection.
*
* This example uses the AnnoManager class to label each
* of the United States with a two-letter mnemonic. The
* labeling is not done in the map projection, however,
* so the text is not part of the map. To show how you
* *can* get your text to be part of the map, this example
* has a second frame which mixes the LLUs and the HLUs
* to achieve this affect (since this *is* doable in the
* LLUs).
*/
#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 <ncarg/hlu/AnnoManager.h>
#include <ncarg/hlu/TextItem.h>
/*
* You must include ncarg/ncargC.h and ncarg/gks.h in order to get the
* correct function prototyping for the low-level C routines.
*/
#include <ncarg/ncargC.h>
#include <ncarg/gks.h>
#define NCLS 100
#define NCOLORS 23
#define NDIM 50
#define NCIRC 100
/*
* Declare the common block in which the angle at which the label of a
* point on the globe is to be written and the latitude and longitude
* of the point being labelled are transmitted to the routine PCMPXY,
* in the package PLOTCHAR (this is for the LLU version of this plot).
*/
struct common1 {
float pang, plat, plon;
} NGCALLC(pcmp04,PCMP04);
/*
* Define the state-labelling data.
*/
typedef struct _Anno_List {
NhlString name;
float lat;
float lon;
} Anno_List;
Anno_List anno_list[] = {
{ "AL" , 33.0 , -86.5 }, { "AK" , 65.0 , -152.0 },
{ "AZ" , 34.7 , -111.5 }, { "AR" , 35.0 , -92.5 },
{ "CA" , 37.5 , -120.5 }, { "CO" , 39.0 , -105.8 },
{ "CT" , 41.6 , -72.6 }, { "DE" , 39.0 , -75.5 },
{ "FL" , 28.5 , -82.0 }, { "GA" , 32.5 , -83.0 },
{ "HI" , 20.0 , -157.0 }, { "ID" , 43.5 , -114.0 },
{ "IL" , 40.2 , -89.2 }, { "IN" , 40.0 , -86.0 },
{ "IA" , 42.0 , -93.2 }, { "KS" , 38.5 , -98.2 },
{ "KY" , 37.4 , -84.5 }, { "LA" , 31.2 , -92.5 },
{ "ME" , 45.5 , -69.0 }, { "MD" , 39.2 , -76.5 },
{ "MA" , 42.3 , -72.0 }, { "MI" , 44.0 , -85.0 },
{ "MN" , 46.0 , -94.5 }, { "MS" , 32.5 , -89.5 },
{ "MO" , 38.5 , -92.5 }, { "MT" , 47.0 , -109.5 },
{ "NE" , 41.5 , -99.5 }, { "NV" , 39.8 , -117.0 },
{ "NH" , 43.2 , -71.6 }, { "NJ" , 39.7 , -74.5 },
{ "NM" , 34.7 , -106.0 }, { "NY" , 43.0 , -75.0 },
{ "NC" , 35.5 , -79.5 }, { "ND" , 47.5 , -100.5 },
{ "OH" , 40.2 , -82.5 }, { "OK" , 35.6 , -97.5 },
{ "OR" , 44.0 , -120.2 }, { "PA" , 40.8 , -77.6 },
{ "RI" , 41.7 , -71.5 }, { "SC" , 34.0 , -80.5 },
{ "SD" , 44.5 , -100.5 }, { "TN" , 36.0 , -86.5 },
{ "TX" , 32.0 , -100.0 }, { "UT" , 39.5 , -111.5 },
{ "VT" , 44.2 , -72.5 }, { "VA" , 37.6 , -78.6 },
{ "WA" , 47.5 , -120.5 }, { "WV" , 38.5 , -80.8 },
{ "WI" , 44.5 , -89.5 }, { "WY" , 43.0 , -107.5 },
};
int main()
{
/*
* Define variables for HLU objects and other stuff.
*/
float x, y, zdat[NCLS][NCLS], xlat, xlon;
float xlonrng, xlatrng, xlonstp, xlatstp, dist;
float miss_val = 1.e12;
ng_size_t count[2];
int appid, wid, dataid, cnid, mpid, gsid, gkswid;
int srlist, grlist, i, j;
float dfce = 1.3, rtod = 57.2957795130823;
/*
* cminlon, cmaxlon, cminlat, and cmaxlat are the four corners where we
* want the contour plot to lie. ctrlat and ctrlon is the center of
* the circular contour plot (and also where we want to put a marker at
* the location of Boulder, CO). clat and clon will hold the lat/lon
* coordinates for the circle we want to contain the contour plot in.
*/
float cminlon = -115., cmaxlon = -95.;
float cminlat = 32., cmaxlat = 48.;
float ctrlat = 40.;
float ctrlon = -105.;
float clat[NCIRC],clon[NCIRC];
/*
* Define arrays to hold a list of two-character mnemonics
* for the states, and the latitude and longitude of a point where the
* mnemonic may be placed to label the state.
*/
ng_size_t num_am_ids = NDIM;
int *am_ids, text_ids[NDIM];
/*
* Declare variables for defining color map.
*/
ng_size_t length[2];
float cmap[NCOLORS][3];
/*
* Default is to create an X11 window.
*/
char const *wks_type = "x11";
/*
* Initialize the HLU library and set up resource template.
* A resource file is not used in this example, but if you did
* want one, it would be called "cn17.res".
*/
NhlInitialize();
srlist = NhlRLCreate(NhlSETRL);
grlist = NhlRLCreate(NhlGETRL);
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNappDefaultParent,"True");
NhlRLSetString(srlist,NhlNappUsrDir,"./");
NhlCreate(&appid,"cn17",NhlappClass,0,srlist);
/*
* Modify the color map. Colors for contour fill areas varying from
* blue to red.
*/
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] = .6 ;
cmap[2][1] = .6 ;
cmap[2][2] = .6 ;
cmap[3][0] = 0. ;
cmap[3][1] = 0. ;
cmap[3][2] = 0. ;
cmap[4][0] = 1.;
cmap[4][1] = 1.;
cmap[4][2] = 1.;
cmap[5][0] = .4;
cmap[5][1] = .4;
cmap[5][2] = .4;
cmap[6][0] = 1.;
cmap[6][1] = 1.;
cmap[6][2] = 0.;
for(i=8; i <= NCOLORS; i++ ) {
cmap[i-1][0] = (float)(NCOLORS-i)/15.;
cmap[i-1][1] = 0.;
cmap[i-1][2] = (float)(i-8)/15.;
}
length[0] = NCOLORS;
length[1] = 3;
if (!strcmp(wks_type,"ncgm") || !strcmp(wks_type,"NCGM")) {
/*
* Create an NCGM workstation.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNwkMetaName,"./cn17c.ncgm");
NhlRLSetMDFloatArray(srlist,NhlNwkColorMap,&cmap[0][0],2,length);
NhlCreate(&wid,"cn17Work",NhlncgmWorkstationClass,0,srlist);
}
else if (!strcmp(wks_type,"x11") || !strcmp(wks_type,"X11")) {
/*
* Create an X11 workstation.
*/
NhlRLClear(srlist);
NhlRLSetMDFloatArray(srlist,NhlNwkColorMap,&cmap[0][0],2,length);
NhlRLSetString(srlist,NhlNwkPause,"True");
NhlCreate(&wid,"cn17Work",NhlcairoWindowWorkstationClass,0,srlist);
}
else if (!strcmp(wks_type,"oldps") || !strcmp(wks_type,"OLDPS")) {
/*
* Create an older-style PostScript workstation.
*/
NhlRLClear(srlist);
NhlRLSetMDFloatArray(srlist,NhlNwkColorMap,&cmap[0][0],2,length);
NhlRLSetString(srlist,NhlNwkPSFileName,"./cn17c.ps");
NhlCreate(&wid,"cn17Work",NhlpsWorkstationClass,0,srlist);
}
else if (!strcmp(wks_type,"oldpdf") || !strcmp(wks_type,"OLDPDF")) {
/*
* Create an older-style PDF workstation.
*/
NhlRLClear(srlist);
NhlRLSetMDFloatArray(srlist,NhlNwkColorMap,&cmap[0][0],2,length);
NhlRLSetString(srlist,NhlNwkPDFFileName,"./cn17c.pdf");
NhlCreate(&wid,"cn17Work",NhlpdfWorkstationClass,0,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);
NhlRLSetMDFloatArray(srlist,NhlNwkColorMap,&cmap[0][0],2,length);
NhlRLSetString(srlist,NhlNwkFileName,"./cn17c");
NhlRLSetString(srlist,NhlNwkFormat,(char*)wks_type);
NhlCreate(&wid,"cn17Work",NhlcairoDocumentWorkstationClass,0,srlist);
}
else if (!strcmp(wks_type,"png") || !strcmp(wks_type,"PNG")) {
/*
* Create a cairo PNG workstation.
*/
NhlRLClear(srlist);
NhlRLSetMDFloatArray(srlist,NhlNwkColorMap,&cmap[0][0],2,length);
NhlRLSetString(srlist,NhlNwkFileName,"./cn17c");
NhlRLSetString(srlist,NhlNwkFormat,(char*)wks_type);
NhlCreate(&wid,"cn17Work",NhlcairoImageWorkstationClass,0,srlist);
}
/*
* Create a "great" circle in lat/lon coordinates. We don't want to draw
* any contour lines outside of this circle.
*/
xlonrng = cmaxlon - cminlon;
xlatrng = cmaxlat - cminlat;
for(i=0; i < NCIRC; i++ ) {
clon[i] = ctrlon + 7.*cos((i*6.28)/(float)(NCIRC-1));
clat[i] = ctrlat + 7.*sin((i*6.28)/(float)(NCIRC-1));
}
/*
* Generate some dummy data to contour later.
*/
xlonstp = xlonrng/(NCLS-1);
xlatstp = xlatrng/(NCLS-1);
for(i = 0; i < NCLS; i++ ) {
xlon = cminlon + i * xlonstp;
x = (float)i/(float)(NCLS-1);
for(j = 0; j < NCLS; j++ ) {
xlat = cminlat + j * xlatstp;
dist = sqrt(pow((ctrlat - xlat),2.) + pow((ctrlon - xlon),2.));
/*
* If xlat/xlon falls outside of circle, then we don't
* want to contour this location.
*/
if (dist <= 7.0) {
y = (float)j/(float)(NCLS-1);
zdat[j][i] = x*x + y*y + x*y + sin(9.*x)*cos(9.*y);
}
else {
zdat[j][i] = miss_val;
}
}
}
/*
* AnnoManager objects allow the PlotManager to manipulate any View
* class object as an annotation a uniform fashion. They allow
* the user to set the View object's size and location relative to
* the viewport of a Plot. They may be located relative to one
* of the viewport sides, or, as in this example, aligned with the
* plot's data space (amTrackData is set True in the resource file).
*
* Create a TextItem for each place name to be included on the map.
* Collect the object ids into an array.
*/
for( i = 0; i < NDIM; i++ ) {
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNtxString,anno_list[i].name);
NhlCreate(&text_ids[i],anno_list[i].name,NhltextItemClass,wid,srlist);
}
/*
* Create a MapPlot object.
*/
NhlRLClear(srlist);
NhlRLSetFloat(srlist,NhlNmpSatelliteAngle1F,7.*rtod*asin(1./dfce)/8.);
NhlRLSetIntegerArray(srlist,NhlNpmAnnoViews,text_ids,NDIM);
NhlCreate(&mpid,"MapPlot",NhlmapPlotClass,wid,srlist);
/*
* Retrieve the ids of the AnnoManager objects created by the PlotManager
* and then set their location in data coordinate space. The AnnoManager
* objects are arranged in the same order as the TextItems in the
* pmAnnoViews resource.
*/
am_ids = (int *)malloc(sizeof(int)*NDIM);
NhlRLClear(grlist);
NhlRLGetIntegerArray(grlist,NhlNpmAnnoManagers,&am_ids,&num_am_ids);
NhlGetValues(mpid,grlist);
for( i = 0; i < num_am_ids; i++ ) {
NhlRLClear(srlist);
NhlRLSetFloat(srlist,NhlNamDataXF,anno_list[i].lon);
NhlRLSetFloat(srlist,NhlNamDataYF,anno_list[i].lat);
NhlSetValues(am_ids[i],srlist);
}
/*
* Create a ScalarField object.
*/
count[0] = NCLS;
count[1] = NCLS;
NhlRLClear(srlist);
NhlRLSetMDFloatArray(srlist,NhlNsfDataArray,&zdat[0][0],2,count);
NhlRLSetFloat(srlist,NhlNsfMissingValueV,miss_val);
NhlRLSetFloat(srlist,NhlNsfXCStartV,cminlon);
NhlRLSetFloat(srlist,NhlNsfXCEndV, cmaxlon);
NhlRLSetFloat(srlist,NhlNsfYCStartV,cminlat);
NhlRLSetFloat(srlist,NhlNsfYCEndV, cmaxlat);
NhlCreate(&dataid,"DataItem",NhlscalarFieldClass,appid,srlist);
/*
* Create ContourPlot object.
*/
NhlRLClear(srlist);
NhlRLSetInteger(srlist,NhlNcnScalarFieldData,dataid);
NhlRLSetString(srlist,NhlNtiMainString,"Satellite view of contour bands in a limited area (using HLUS)");
NhlCreate(&cnid,"ContourPlot",NhlcontourPlotClass,wid,srlist);
/*
* Overlay ContourPlot on MapPlot and draw.
*/
NhlAddOverlay(mpid,cnid,-1);
NhlDraw(mpid);
/*
* Retrieve the GraphicStyle object that was created for us when
* we created the Workstation object. We can then draw polylines
* and polymarkers on our MapPlot on behalf of the GraphicStyle object.
*/
NhlRLClear(grlist);
NhlRLGetInteger(grlist,NhlNwkDefGraphicStyleId,&gsid);
NhlGetValues(wid,grlist);
/*
* Draw circle around our contours.
*/
NhlDataPolyline(mpid,gsid,clon,clat,NCIRC);
/*
* Draw a polymarker at the position of Boulder, Colorado (where
* NCAR is located).
*/
NhlDataPolymarker(mpid,gsid,&ctrlon,&ctrlat,1);
/*
* Advance the frame.
*/
NhlFrame(wid);
/*
* Turn off our previous annotations since we are now annotating
* with LLU calls.
*/
for( i = 0; i < NDIM; i++ ) {
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNamOn,"false");
NhlSetValues(am_ids[i],srlist);
}
/*
* Draw the map, circle, and polymarker.
*/
NhlRLClear(srlist);
NhlRLSetString(srlist,NhlNtiMainString,"Satellite view of contour bands in a limited area (using HLUs/LLUS)");
NhlSetValues(cnid,srlist);
NhlDraw(mpid);
NhlDataPolyline(mpid,gsid,clon,clat,NCIRC);
NhlDataPolymarker(mpid,gsid,&ctrlon,&ctrlat,1);
/*
* Now, let's show how we can mix LLUs and HLUs so we can use Plotchar
* to draw the text in the map projection (which we can't do in the
* HLUs yet). First we need to get the GKS workstation id so we can
* activate this workstation at the LLU level.
*/
NhlRLClear(grlist);
NhlRLGetInteger(grlist,NhlNwkGksWorkId,&gkswid);
NhlGetValues(wid,grlist);
gactivate_ws(gkswid);
/*
* Here's where the LLU calls come in. We are using Plotchar to
* draw the text in our map projection.
*/
c_pcseti ("MAP",4);
c_pcsetr ("ORV",1.e12);
NGCALLC(pcmp04,PCMP04).pang = 45.;
for( i = 0; i < NDIM; i++ ) {
NGCALLC(pcmp04,PCMP04).plat = anno_list[i].lat;
NGCALLC(pcmp04,PCMP04).plon = anno_list[i].lon;
c_plchhq (0.,0.,anno_list[i].name,.5,0.,0.);
}
gdeactivate_ws(gkswid);
/*
* Advance the frame.
*/
NhlFrame(wid);
/*
* NhlDestroy destroys the given id and all of its children.
*/
NhlDestroy(wid);
/*
* Restores state.
*/
NhlClose();
return(0);
}
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