Polar Spline Chart

The following is the command line version of the code in "cppdemo/polarspline". The MFC version of the code is in "mfcdemo/mfcdemo". The Qt Widgets version of the code is in "qtdemo/qtdemo". The QML/Qt Quick version of the code is in "qmldemo/qmldemo".

#include "chartdir.h"

int main(int argc, char *argv[])
{
    // The data for the chart
    double data0[] = {5.1, 2.6, 1.5, 2.2, 5.1, 4.3, 4.0, 9.0, 1.7, 8.8, 9.9, 9.5, 9.4, 1.8, 2.1,
        2.3, 3.5, 7.7, 8.8, 6.1, 5.0, 3.1, 6.0, 4.3};
    const int data0_size = (int)(sizeof(data0)/sizeof(*data0));
    double angles0[] = {0, 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225, 240,
        255, 270, 285, 300, 315, 330, 345};
    const int angles0_size = (int)(sizeof(angles0)/sizeof(*angles0));

    double data1[] = {8.1, 2.5, 5, 5.2, 6.5, 8.5, 9, 7.6, 8.7, 6.4, 5.5, 5.4, 3.0, 8.7, 7.1, 8.8,
        7.9, 2.2, 5.0, 4.0, 1.5, 7.5, 8.3, 9.0};
    const int data1_size = (int)(sizeof(data1)/sizeof(*data1));
    double angles1[] = {0, 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225, 240,
        255, 270, 285, 300, 315, 330, 345};
    const int angles1_size = (int)(sizeof(angles1)/sizeof(*angles1));

    // Create a PolarChart object of size 460 x 460 pixels
    PolarChart* c = new PolarChart(460, 460);

    // Add a title to the chart at the top left corner using 15pt Arial Bold Italic font
    c->addTitle(Chart::TopLeft, "<*underline=2*>EM Field Strength", "Arial Bold Italic", 15);

    // Set center of plot area at (230, 240) with radius 180 pixels
    c->setPlotArea(230, 240, 180);

    // Set the grid style to circular grid
    c->setGridStyle(false);

    // Add a legend box at the top right corner of the chart using 9pt Arial Bold font
    c->addLegend(459, 0, true, "Arial Bold", 9)->setAlignment(Chart::TopRight);

    // Set angular axis as 0 - 360, with a spoke every 30 units
    c->angularAxis()->setLinearScale(0, 360, 30);

    // Add a red (0xff9999) spline area layer to the chart using (data0, angles0)
    c->addSplineAreaLayer(DoubleArray(data0, data0_size), 0xff9999, "Above 100MHz")->setAngles(
        DoubleArray(angles0, angles0_size));

    // Add a blue (0xff) spline line layer to the chart using (data1, angle1)
    PolarSplineLineLayer* layer1 = c->addSplineLineLayer(DoubleArray(data1, data1_size), 0x0000ff,
        "Below 100MHz");
    layer1->setAngles(DoubleArray(angles1, angles1_size));

    // Set the line width to 3 pixels
    layer1->setLineWidth(3);

    // Output the chart
    c->makeChart("polarspline.png");

    //free up resources
    delete c;

    return 0;
}