libplplot-java 5.10.0-0ubuntu5 / usr / share / doc / libplplot12 / examples / java / x02.java

//--------------------------------------------------------------------------
// $Id: x02.java 12288 2013-01-30 04:40:35Z airwin $
//--------------------------------------------------------------------------

//--------------------------------------------------------------------------
// Copyright (C) 2001  Geoffrey Furnish
// Copyright (C) 2002  Alan W. Irwin
// Copyright (C) 2004,2005  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 2 in Java.
//--------------------------------------------------------------------------

package plplot.examples;

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

import java.text.*;

class x02 {
    private PLStream pls;

    public static void main( String[] args )
    {
        new x02( args );
    }

    x02( String[] args )
    {
        pls = new PLStream();

        // Parse and process command line arguments.

        pls.parseopts( args, PL_PARSE_FULL | PL_PARSE_NOPROGRAM );

        // Initialize plplot.

        pls.init();
        demo1();
        demo2();

        pls.end();
    }

    void demo1()
    {
        pls.bop();

        // Divide screen into 16 regions.

        pls.ssub( 4, 4 );

        draw_windows( 16, 0 );

        pls.eop();
    }

    void demo2()
    {
        // Set up cmap0
        // Use 100 custom colors in addition to base 16
        int[] r   = new int[116];
        int[] g   = new int[116];
        int[] b   = new int[116];
        int[] r1i = new int[1];
        int[] g1i = new int[1];
        int[] b1i = new int[1];

        // Min and max lightness values
        double lmin = 0.15, lmax = 0.85;

        int    i;

        pls.bop();

        // Divide screen into 100 regions.
        pls.ssub( 10, 10 );

        for ( i = 0; i <= 99; i++ )
        {
            double h, l, s;
            double[] r1 = new double[1];
            double[] g1 = new double[1];
            double[] b1 = new double[1];


            // Bounds on HLS, from plhlsrgb() commentary --
            //	hue		[0., 360.]	degrees
            //	lightness	[0., 1.]	magnitude
            //	saturation	[0., 1.]	magnitude
            //

            // Vary hue uniformly from left to right
            h = ( 360. / 10. ) * ( i % 10 );
            // Vary lightness uniformly from top to bottom, between min & max
            l = lmin + ( lmax - lmin ) * ( i / 10 ) / 9.;
            // Use max saturation
            s = 1.0;

            pls.hlsrgb( h, l, s, r1, g1, b1 );

            r[i + 16] = (int) ( r1[0] * 255.001 );
            g[i + 16] = (int) ( g1[0] * 255.001 );
            b[i + 16] = (int) ( b1[0] * 255.001 );
        }

        // Load default cmap0 colors into our custom set
        for ( i = 0; i <= 15; i++ )
        {
            pls.gcol0( i, r1i, g1i, b1i );
            r[i] = r1i[0];
            g[i] = g1i[0];
            b[i] = b1i[0];
        }


        // Now set cmap0 all at once (faster, since fewer driver calls)
        pls.scmap0( r, g, b );

        draw_windows( 100, 16 );

        pls.eop();
    }

    // --------------------------------------------------------------------
    // draw_windows
    //
    // Draws a set of numbered boxes with colors according to cmap0 entry.
    // --------------------------------------------------------------------
    void draw_windows( int nw, int cmap0_offset )
    {
        int          i, j;
        double       vmin, vmax;
        NumberFormat nf = NumberFormat.getNumberInstance();


        pls.schr( 0.0, 3.5 );
        pls.font( 4 );

        for ( i = 0; i < nw; i++ )
        {
            pls.col0( i + cmap0_offset );

            String text = nf.format( i );

            pls.adv( 0 );
            vmin = 0.1;
            vmax = 0.9;
            for ( j = 0; j <= 2; j++ )
            {
                pls.width( j + 1 );
                pls.vpor( vmin, vmax, vmin, vmax );
                pls.wind( 0.0, 1.0, 0.0, 1.0 );
                pls.box( "bc", 0.0, 0, "bc", 0.0, 0 );
                vmin = vmin + 0.1;
                vmax = vmax - 0.1;
            }
            pls.width( 1 );
            pls.ptex( 0.5, 0.5, 1.0, 0.0, 0.5, text );
        }
    }
}

//--------------------------------------------------------------------------
//                              End of x02.java
//--------------------------------------------------------------------------