libplplot-dev 5.9.9-2ubuntu2 / usr / share / doc / libplplot11 / examples / c++ / x11.cc

//--------------------------------------------------------------------------
// $Id: x11.cc 11760 2011-06-01 19:29:11Z airwin $
//--------------------------------------------------------------------------
//
//--------------------------------------------------------------------------
// Copyright (C) 2004  Andrew Ross <andrewr@coriolis.greenend.org.uk>
// Copyright (C) 2004  Alan W. Irwin
//
// 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 11 in C++.
//--------------------------------------------------------------------------

#include "plc++demos.h"

#ifdef PL_USE_NAMESPACE
using namespace std;
#endif

class x11 {
public:
    x11( int, const char** );
    void cmap1_init();

private:
    plstream           *pls;

    static const int   XPTS;
    static const int   YPTS;
    static const int   LEVELS;
    static const int   opt[];
    static const PLFLT alt[];
    static const PLFLT az[];

    static const char  *title[];
};


const int   x11::  XPTS   = 35;
const int   x11::  YPTS   = 46;
const int   x11::  LEVELS = 10;
const int   x11::  opt[]  = { 3, 3 };
const PLFLT x11::alt[] = { 33.0, 17.0 };
const PLFLT x11::az[] = { 24.0, 115.0 };

const char  *x11::title[] = {
    "#frPLplot Example 11 - Alt=33, Az=24, Opt=3",
    "#frPLplot Example 11 - Alt=17, Az=115, Opt=3"
};



void x11::cmap1_init()
{
    PLFLT *i   = new PLFLT[2];
    PLFLT *h   = new PLFLT[2];
    PLFLT *l   = new PLFLT[2];
    PLFLT *s   = new PLFLT[2];
    bool  *rev = new bool[2];

    i[0] = 0.0;       // left boundary
    i[1] = 1.0;       // right boundary

    h[0] = 240;       // blue -> green -> yellow ->
    h[1] = 0;         // -> red

    l[0] = 0.6;
    l[1] = 0.6;

    s[0] = 0.8;
    s[1] = 0.8;

    rev[0] = false;       // interpolate on front side of colour wheel.
    rev[1] = false;       // interpolate on front side of colour wheel.

    pls->scmap1n( 256 );
    pls->scmap1l( false, 2, i, h, l, s, rev );

    delete[] i;
    delete[] h;
    delete[] l;
    delete[] s;
    delete[] rev;
}


x11::x11( int argc, const char **argv )
{
    int   i, j, k;

    PLFLT *x = new PLFLT[ XPTS ];
    PLFLT *y = new PLFLT[ YPTS ];
    PLFLT **z;
    PLFLT zmin = 1E9, zmax = -1E-9;

    PLFLT xx, yy;
    int   nlevel  = LEVELS;
    PLFLT *clevel = new PLFLT[LEVELS];
    PLFLT step;



    pls = new plstream();

    // Parse and process command line arguments.

    pls->parseopts( &argc, argv, PL_PARSE_FULL );


    // Initialize plplot.

    pls->init();

    //  pls->Alloc2dGrid(&z, XPTS, YPTS);
    pls->Alloc2dGrid( &z, XPTS, YPTS );

    for ( i = 0; i < XPTS; i++ )
        x[i] = 3. * (PLFLT) ( i - ( XPTS / 2 ) ) / (PLFLT) ( XPTS / 2 );

    for ( j = 0; j < YPTS; j++ )
        y[j] = 3. * (PLFLT) ( j - ( YPTS / 2 ) ) / (PLFLT) ( YPTS / 2 );

    for ( i = 0; i < XPTS; i++ )
    {
        xx = x[i];
        for ( j = 0; j < YPTS; j++ )
        {
            yy      = y[j];
            z[i][j] = 3. * ( 1. - xx ) * ( 1. - xx ) * exp( -( xx * xx ) - ( yy + 1. ) * ( yy + 1. ) ) -
                      10. * ( xx / 5. - pow( (double) xx, 3. ) - pow( (double) yy, 5. ) ) * exp( -xx * xx - yy * yy ) -
                      1. / 3. * exp( -( xx + 1 ) * ( xx + 1 ) - ( yy * yy ) );
            if ( false ) // Jungfraujoch/Interlaken
            {
                if ( z[i][j] < -1. )
                    z[i][j] = -1.;
            }
            if ( zmin > z[i][j] )
                zmin = z[i][j];
            if ( zmax < z[i][j] )
                zmax = z[i][j];
        }
    }

    step = ( zmax - zmin ) / ( nlevel + 1 );
    for ( i = 0; i < nlevel; i++ )
        clevel[i] = zmin + step + step * i;

    cmap1_init();
    for ( k = 0; k < 2; k++ )
    {
        for ( i = 0; i < 4; i++ )
        {
            pls->adv( 0 );
            pls->col0( 1 );
            pls->vpor( 0.0, 1.0, 0.0, 0.9 );
            pls->wind( -1.0, 1.0, -1.0, 1.5 );

            pls->w3d( 1.0, 1.0, 1.2, -3.0, 3.0, -3.0, 3.0, zmin, zmax,
                alt[k], az[k] );
            pls->box3( "bnstu", "x axis", 0.0, 0,
                "bnstu", "y axis", 0.0, 0,
                "bcdmnstuv", "z axis", 0.0, 4 );

            pls->col0( 2 );

            // wireframe plot
            if ( i == 0 )
                pls->mesh( x, y, z, XPTS, YPTS, opt[k] );

            // magnitude colored wireframe plot
            else if ( i == 1 )
                pls->mesh( x, y, z, XPTS, YPTS, opt[k] | MAG_COLOR );

            // magnitude colored wireframe plot with sides
            else if ( i == 2 )
            {
                pls->plot3d( x, y, z, XPTS, YPTS, opt[k] | MAG_COLOR, true );
            }

            // magnitude colored wireframe plot with base contour
            else if ( i == 3 )
                pls->meshc( x, y, z, XPTS, YPTS, opt[k] | MAG_COLOR | BASE_CONT,
                    clevel, nlevel );


            pls->col0( 3 );
            pls->mtex( "t", 1.0, 0.5, 0.5, title[k] );
        }
    }

    //pls->end();

    pls->Free2dGrid( z, XPTS, YPTS );

    delete[] x;
    delete[] y;
    delete[] clevel;

    delete pls;
}

// Does a series of mesh plots for a given data set, with different viewing
// options in each plot.


int main( int argc, const char **argv )
{
    x11 *x = new x11( argc, argv );

    delete x;
}


//--------------------------------------------------------------------------
//                              End of x11.cc
//--------------------------------------------------------------------------