Function main

examples/cpu/bubblechart.cpp:40–134

}

int main(void)
{
    std::vector<float> cosData;
    std::vector<float> tanData;

    map_range_to_vec_vbo(FRANGE_START, FRANGE_END, 0.1f, cosData, &cosf);
    map_range_to_vec_vbo(FRANGE_START, FRANGE_END, 0.1f, tanData, &tanf);

    std::random_device r;

    std::default_random_engine e1(r());
    std::mt19937_64 gen(r());

    std::uniform_int_distribution<int> uDist(20, 80);
    std::uniform_real_distribution<float> cDist(0.2f, 0.6f);
    std::uniform_real_distribution<float> fDist(0.4f, 0.6f);

    auto clr = std::bind(cDist, gen);
    auto rnd = std::bind(uDist, e1);
    auto alp = std::bind(fDist, gen);

    std::vector<float> colors(3*tanData.size());
    std::vector<float> alphas(tanData.size());
    std::vector<float> radii(tanData.size());

    std::generate(colors.begin(), colors.end(), clr);
    std::generate(radii.begin(), radii.end(), rnd);
    std::generate(alphas.begin(), alphas.end(), alp);

    /*
     * First Forge call should be a window creation call
     * so that necessary OpenGL context is created for any
     * other forge::* object to be created successfully
     */
    forge::Window wnd(DIMX, DIMY, "Bubble chart with Transparency Demo");
    wnd.makeCurrent();

    forge::Chart chart(FG_CHART_2D);
    chart.setAxesLimits(FRANGE_START, FRANGE_END, -1.0f, 1.0f);

    /* Create several plot objects which creates the necessary
     * vertex buffer objects to hold the different plot types
     */
    forge::Plot plt1 = chart.plot((unsigned)(cosData.size()/2), forge::f32,
                               FG_PLOT_LINE, FG_MARKER_TRIANGLE); //or specify a specific plot type
    forge::Plot plt2 = chart.plot((unsigned)(tanData.size()/2), forge::f32,
                               FG_PLOT_LINE, FG_MARKER_CIRCLE); //last parameter specifies marker shape

    /* Set plot colors */
    plt1.setColor(FG_RED);
    plt2.setColor(FG_GREEN);            //use a forge predefined color
    /* Set plot legends */
    plt1.setLegend("Cosine");
    plt2.setLegend("Tangent");
    /* set plot global marker size */
    plt1.setMarkerSize(20);
    /* copy your data into the opengl buffer object exposed by
     * forge::Plot class and then proceed to rendering.