libplplot-dev 5.9.9-2ubuntu2 / usr / share / doc / libplplot11 / examples / c++ / x02.cc

//--------------------------------------------------------------------------
// $Id: x02.cc 11297 2010-11-02 03:31:14Z airwin $
//--------------------------------------------------------------------------
//
//--------------------------------------------------------------------------
// Copyright (C) 2004,2005  Andrew Ross
// 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 2 in C++.
//--------------------------------------------------------------------------

#include "plc++demos.h"

#ifdef PL_USE_NAMESPACE
using namespace std;
#endif

class x02 {
public:
    x02( int, const char ** );

private:
    void demo1();
    void demo2();
    void draw_windows( int nw, int cmap0_offset );

    // Class data
    plstream *pls;
};

//--------------------------------------------------------------------------
// demo1
//
// Demonstrates multiple windows and default color map 0 palette.
//--------------------------------------------------------------------------
void
x02::demo1()
{
    pls->bop();

    // Divide screen into 16 regions.
    pls->ssub( 4, 4 );

    draw_windows( 16, 0 );

    pls->eop();
}

//--------------------------------------------------------------------------
// demo1
//
// Demonstrates multiple windows and default color map 0 palette.
//--------------------------------------------------------------------------
void
x02::demo2()
{
    // Set up cmap0
    // Use 100 custom colors in addition to base 16
    PLINT r[116], g[116], b[116];

    // Min and max lightness values
    PLFLT 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++ )
    {
        PLFLT h, l, s;
        PLFLT r1, g1, b1;

        // 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] = (PLINT) ( r1 * 255.001 );
        g[i + 16] = (PLINT) ( g1 * 255.001 );
        b[i + 16] = (PLINT) ( b1 * 255.001 );
    }

    // Load default cmap0 colors into our custom set
    for ( i = 0; i <= 15; i++ )
        pls->gcol0( i, r[i], g[i], b[i] );

    // Now set cmap0 all at once (faster, since fewer driver calls)
    pls->scmap0( r, g, b, 116 );

    draw_windows( 100, 16 );

    pls->eop();
}

//--------------------------------------------------------------------------
// draw_windows
//
// Draws a set of numbered boxes with colors according to cmap0 entry.
//--------------------------------------------------------------------------
void
x02::draw_windows( int nw, int cmap0_offset )
{
    int   i, j;
    PLFLT vmin, vmax;
    char  text[3];

    pls->schr( 0.0, 3.5 );
    pls->font( 4 );

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

        sprintf( text, "%d", i );

        pls->adv( 0 );
        vmin = 0.1;
        vmax = 0.9;
        for ( j = 0; j <= 2; j++ )
        {
            pls->wid( 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->wid( 1 );
        pls->ptex( 0.5, 0.5, 1.0, 0.0, 0.5, text );
    }
}

x02::x02( int argc, const char ** argv )
{
    // plplot initialization

    pls = new plstream();


    // Parse and process command line arguments.
    pls->parseopts( &argc, argv, PL_PARSE_FULL );

    // Initialize PLplot.
    pls->init();

    demo1();
    demo2();

    //pls->end();
    delete pls;
}

int main( int argc, const char ** argv )
{
    x02 *x = new x02( argc, argv );

    delete x;
}


//--------------------------------------------------------------------------
//                              End of x02.cc
//--------------------------------------------------------------------------