libplplot-java 5.10.0-0ubuntu5 / usr / share / doc / libplplot12 / examples / java / x01.java

//--------------------------------------------------------------------------
// $Id: x01.java 12288 2013-01-30 04:40:35Z airwin $
//--------------------------------------------------------------------------

//--------------------------------------------------------------------------
// Copyright (C) 2001  Geoffrey Furnish
// Copyright (C) 2001, 2002  Alan W. Irwin
// Copyright (C) 2004  Andrew Ross
//

//
// This file is part of PLplot.
//
// PLplot is free software; you can redistribute it and/or modify
// it under the terms of the GNU Library General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// PLplot is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public License
// along with PLplot; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
//--------------------------------------------------------------------------

//--------------------------------------------------------------------------
// Implementation of PLplot example 1 in Java.
//--------------------------------------------------------------------------

package plplot.examples;

import plplot.core.*;
import static plplot.core.plplotjavacConstants.*;

import java.lang.Math;

class x01 {
    double   xscale, yscale, xoff, yoff;
    PLStream pls = new PLStream();

    // Set this to true to test the xormod method
    static boolean test_xor = false;

    static boolean locate_mode = false;
    static int     fontset     = 1;
    static String  f_name      = null;

    public static void main( String[] args )
    {
        new x01( args );
    }

    public x01( String[] args )
    {
        // plplot initialization

        // Parse and process command line arguments.

//         plMergeOpts(options, "x01c options", notes);
        pls.parseopts( args, PL_PARSE_FULL | PL_PARSE_NOPROGRAM );

// Print out version number.

        StringBuffer version = new StringBuffer( 80 );
        // plgver no longer works for unexplained reasons.
        pls.gver( version );
        System.out.println( "PLplot library version: " + version );

        // Initialize PLplot.
        // Divide page into 2x2 plots unless user overrides.
        pls.star( 2, 2 );

        // Select the multi-stroke font.
        if ( fontset == 1 )
            pls.fontld( 1 );
        else
            pls.fontld( 0 );

        // Set up the data
        // Original case

        xscale = 6.;
        yscale = 1.;
        xoff   = 0.;
        yoff   = 0.;

        // Do a plot
        plot1( false );

        // Set up the data

        xscale = 1.;
        yscale = 0.0014;
        yoff   = 0.0185;

        // Do a plot

        int digmax = 5;
        pls.syax( digmax, 0 );

        plot1( true );

        plot2();

        plot3();

        // Test option to save file
        if ( f_name != null )
        {
        }
        // Let's get some user input

//         if (locate_mode) {
//             for (;;) {
//                 if (! plGetCursor(&gin)) break;
//                 if (gin.keysym == PLK_Escape) break;

//                 pltext();
//                 if (gin.keysym < 0xFF && isprint(gin.keysym))
//                     printf("wx = %f,  wy = %f, dx = %f,  dy = %f,  c = '%c'\n",
//                            gin.wX, gin.wY, gin.dX, gin.dY, gin.keysym);
//                 else
//                     printf("wx = %f,  wy = %f, dx = %f,  dy = %f,  c = 0x%02x\n",
//                            gin.wX, gin.wY, gin.dX, gin.dY, gin.keysym);

//                 plgra();
//             }
//         }

        // Don't forget to call plend() to finish off!
        pls.end();
    }

    void plot1( boolean do_test )
    {
        int     i;
        double  xmin, xmax, ymin, ymax;
        double  x[]  = new double[60];
        double  y[]  = new double[60];
        double  xs[] = new double[6];
        double  ys[] = new double[6];
        boolean st[] = new boolean[1];
        double  xx[] = new double[1];
        double  yy[] = new double[1];

        for ( i = 0; i < 60; i++ )
        {
            x[i] = xoff + xscale * ( i + 1 ) / 60.0;
            y[i] = yoff + yscale * Math.pow( x[i], 2. );
        }

        xmin = x[0];
        xmax = x[59];
        ymin = y[0];
        ymax = y[59];

        for ( i = 0; i < 6; i++ )
        {
            xs[i] = x[i * 10 + 3];
            ys[i] = y[i * 10 + 3];
        }

        // Set up the viewport and window using PLENV. The range in X is 0.0 to
        // 6.0, and the range in Y is 0.0 to 30.0. The axes are scaled separately
        // (just = 0), and we just draw a labelled box (axis = 0).

        pls.col0( 1 );
        pls.env( xmin, xmax, ymin, ymax, 0, 0 );
        pls.col0( 2 );
        pls.lab( "(x)", "(y)", "#frPLplot Example 1 - y=x#u2" );

        // Plot the data points.

        pls.col0( 4 );
        pls.poin( xs, ys, 9 );

        // Draw the line through the data.

        pls.col0( 3 );
        pls.line( x, y );

        // xor mode enable erasing a line/point/text by replotting it again
        // it does not work in double buffering mode, however

        if ( do_test && test_xor )
        {
            pls.xormod( true, st ); // enter xor mode
            if ( st[0] )
            {
                for ( i = 0; i < 60; i++ )
                {
                    xx[0] = x[i];
                    yy[0] = y[i];
                    pls.poin( xx, yy, 9 );            // draw a point
                    try {
                        Thread.sleep( 50 );           // wait a little
                    }
                    catch ( InterruptedException ie ) {
                    }
                    pls.flush();               // force an update of the tk driver
                    pls.poin( xx, yy, 9 );     // erase point
                }
                pls.xormod( false, st );       // leave xor mode
            }
        }
    }

    void plot2()
    {
        int    i;
        double x[] = new double[100];
        double y[] = new double[100];

        // Set up the viewport and window using PLENV. The range in X is -2.0 to
        // 10.0, and the range in Y is -0.4 to 2.0. The axes are scaled
        // separately (just = 0), and we draw a box with axes (axis = 1).

        pls.col0( 1 );
        pls.env( -2.0, 10.0, -0.4, 1.2, 0, 1 );
        pls.col0( 2 );
        pls.lab( "(x)", "sin(x)/x", "#frPLplot Example 1 - Sinc Function" );

        // Fill up the arrays.

        for ( i = 0; i < 100; i++ )
        {
            x[i] = ( i - 19.0 ) / 6.0;
            y[i] = 1.0;
            if ( x[i] != 0.0 )
                y[i] = Math.sin( x[i] ) / x[i];
        }

        // Draw the line.

        pls.col0( 3 );
        pls.width( 2 );
        pls.line( x, y );
        pls.width( 1 );
    }

    void plot3()
    {
        int    i;
        int    space0[] = {};
        int    mark0[] = {};
        int    space1[] = { 1500 };
        int    mark1[]  = { 1500 };
        double x[]      = new double[101];
        double y[]      = new double[101];

        // For the final graph we wish to override the default tick intervals,
        // and so do not use plenv().

        pls.adv( 0 );

        // Use standard viewport, and define X range from 0 to 360 degrees, Y
        // range from -1.2 to 1.2.

        pls.vsta();
        pls.wind( 0.0, 360.0, -1.2, 1.2 );

        // Draw a box with ticks spaced 60 degrees apart in X, and 0.2 in Y.

        pls.col0( 1 );
        pls.box( "bcnst", 60.0, 2, "bcnstv", 0.2, 2 );

        // Superimpose a dashed line grid, with 1.5 mm marks and spaces.
        // plstyl expects a pointer!

        pls.styl( mark1, space1 );
        pls.col0( 2 );
        pls.box( "g", 30.0, 0, "g", 0.2, 0 );
        pls.styl( mark0, space0 );

        pls.col0( 3 );
        pls.lab( "Angle (degrees)", "sine",
            "#frPLplot Example 1 - Sine function" );

        for ( i = 0; i < 101; i++ )
        {
            x[i] = 3.6 * i;
            y[i] = Math.sin( x[i] * Math.PI / 180.0 );
        }

        pls.col0( 4 );
        pls.line( x, y );
    }
}

//--------------------------------------------------------------------------
//                              End of x01.java
//--------------------------------------------------------------------------