/usr/share/ncarg/hluex/primitives/pr01c.c

/*;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;                                                                       ;
;                Copyright (C)  1996                                    ;
;        University Corporation for Atmospheric Research                ;
;                All Rights Reserved                                    ;
;                                                                       ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
;   File:       pr01c.c
;
;   Author: Lynn Hermanson
;           National Center for Atmospheric Research
;           PO 3000, Boulder, Colorado
; 
;   Date:       May 6, 1996
;
;   Description:     Given an array of xaxis values and 
;                    an array of yaxis values, where each 
;                    x,y pair corresponds to one vertex or
;                    the location of one point, draw a
;                    square (a polyline), four points (asterisks)
;                    at the corners of a square (a polymarker), and
;                    a rectangular filled area (a polygon),on to
;                    a blank canvas (an empty default logLinPlot).
;                    
;                    Polylines, polymarkers, and polygons, are
;                    refered to as primitives.
*/

#include <stdio.h>
#include <math.h>
#include <ncarg/gks.h>
#include <ncarg/ncargC.h>
#include <ncarg/hlu/hlu.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/LogLinPlot.h>
#include <ncarg/hlu/GraphicStyle.h>

int main(int argc, char *argv[])
{
    char const *wks_type = "x11";
    int rlist,grlist;
    int appid,wid,cid,gsid;

/*These are the polyline points*/ /*a square*/
    float X[] = { 0.3,0.3,0.5,0.5,0.3 };
    float Y[] = { 0.3,0.5,0.5,0.3,0.3 };

/*These are the polymarker points*/ /*four corner points*/
    float U[] = { 0.4,0.4,0.6,0.6 };
    float V[] = { 0.4,0.6,0.6,0.4 };

/*These are the polygon points*/ /*a filled rectangle*/
    float PX[] = { 0.7,0.7,0.8,0.8,0.7 };
    float PY[] = { 0.2,0.8,0.8,0.2,0.2 };

/*
 * Initialize the high level utility library
 */
    NhlInitialize();

/* Next,
; 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 the following examples default resources are used. 
*/
   rlist = NhlRLCreate(NhlSETRL);
    grlist = NhlRLCreate(NhlGETRL);
    NhlRLClear(rlist);
    NhlRLSetString(rlist,NhlNappUsrDir,"./");
    NhlCreate(&appid,"pr01",NhlappClass,NhlDEFAULT_APP,rlist);


/*; Choose to display output to an X11 workstation.(set above)*/

    if (!strcmp(wks_type,"ncgm") || !strcmp(wks_type,"NCGM")) {
/*
 * Create a meta file workstation.
 */
        NhlRLClear(rlist);
        NhlRLSetString(rlist,NhlNwkMetaName,"./pr01c.ncgm");
        NhlCreate(&wid,"pr01Work",
                  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,"pr01Work",NhlcairoWindowWorkstationClass,appid,rlist);
    }

    else if (!strcmp(wks_type,"oldps") || !strcmp(wks_type,"OLDPS")) {
/*
 * Create an older-style PostScript workstation.
 */
        NhlRLClear(rlist);
        NhlRLSetString(rlist,NhlNwkPSFileName,"pr01c.ps");
        NhlCreate(&wid,"pr01Work",NhlpsWorkstationClass,appid,rlist);
    }
    else if (!strcmp(wks_type,"oldpdf") || !strcmp(wks_type,"OLDPDF")) {
/*
 * Create an older-style PDF workstation.
 */
        NhlRLClear(rlist);
        NhlRLSetString(rlist,NhlNwkPDFFileName,"pr01c.pdf");
        NhlCreate(&wid,"pr01Work",NhlpdfWorkstationClass,appid,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,"pr01c");
        NhlRLSetString(rlist,NhlNwkFormat,(char*)wks_type);
        NhlCreate(&wid,"pr01Work",NhlcairoDocumentWorkstationClass,appid,rlist);
    }
    else if (!strcmp(wks_type,"png") || !strcmp(wks_type,"PNG")) {
/*
 * Create a cairo PNG workstation.
 */
        NhlRLClear(rlist);
        NhlRLSetString(rlist,NhlNwkFileName,"pr01c");
        NhlRLSetString(rlist,NhlNwkFormat,(char*)wks_type);
        NhlCreate(&wid,"pr01Work",NhlcairoImageWorkstationClass,appid,rlist);
    }

/*; Create a blank plot object to place the primitives on.*/

    NhlRLClear(rlist);
    NhlCreate(&cid,"canvas",NhllogLinPlotClass,wid,rlist);

/*; Create a graphicPlot object consisting of, the default styles.*/
/*; The graphicStyle object is NOT a stand-alone plot object. There
;   must exist some kind of plot object which has already been drawn
    to place the primitives on.
*/
    NhlRLClear(rlist);
    NhlCreate(&gsid,"defaultstyle",NhlgraphicStyleClass,wid,rlist);


/*; Draw the shapes onto the blank logLinPlot object.
; Signify end of frame.*/

NhlDraw(cid);

/* The last paramenter is the number of points required*/
NhlNDCPolyline(cid, gsid, X, Y,5);
NhlNDCPolymarker(cid, gsid, U, V,4);
NhlNDCPolygon(cid, gsid, PX, PY,5);
NhlFrame(wid);

/*; Destroy all of the objects created, close the HLU library and exit.*/

NhlDestroy(cid);
NhlDestroy(wid);
NhlDestroy(appid);
NhlClose();
exit(0);
}
libncarg-data 6.2.0-3 / usr / share / ncarg / hluex / primitives / pr01c.c
