#include "mainwindow.h"
#include <QApplication>
#include <QtCore/qmath.h>
#include <QList>
#include <QtWidgets/QApplication>
#include <QtWidgets/QMainWindow>
#include <QtCharts/QChartView>
#include <QtCharts/QLineSeries>
QT_CHARTS_USE_NAMESPACE
class PointerList{

public:
    double   x1,y1;
    PointerList(double pts[]){
        x1=pts[0];
        y1=pts[1];
    }
    PointerList(){
    }
};

class FlightObject{
private:
    double V0=0, angle=0, g=9.8;
public:
FlightObject(double _v0, double _angle){
    V0=_v0;
    angle=_angle;
}

QList<PointerList> getPointer(){
    QList<PointerList> temp;
    double Vx0 = V0 * qCos(angle),
           Vy0 = V0 * qSin(angle),
           t0=0, T =  2 * Vy0 / g;
    for(auto i = t0; i<=T;i+=0.1){
        double X1 = 0 + Vx0 * i;
        double Y1 = 0 + Vy0 * i - g * i * i / 2;
        temp.append(PointerList(new double[2]{X1,Y1}));
    }
    return temp;
}
QList<PointerList> getPointer(double _x0, double _y0){
    QList<PointerList> temp;
    double Vx0 = V0 * qCos(angle),
           Vy0 = V0 * qSin(angle),
           t0=0, T =  2 * Vy0 / g;
    for(auto i = t0; i<=T;i+=0.1){
        double X1 = _x0 + Vx0 * i;
        double Y1 = _y0 + Vy0 * i - g * i * i / 2;
        temp.append(PointerList(new double[2]{X1,Y1}));
    }
    return temp;
}
};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    FlightObject point(45.0,45.0);
    QLineSeries *series = new QLineSeries();
    foreach(PointerList t, point.getPointer()){
        series->append(t.x1,t.y1);
    }
    QChart *chart = new QChart();
      chart->legend()->hide();
      chart->addSeries(series);
      chart->createDefaultAxes();
      chart->setTitle("Simple line chart example");
    QChartView *chartView = new QChartView(chart);
    chartView->setRenderHint(QPainter::Antialiasing);
    MainWindow w;
    w.setCentralWidget(chartView);
    w.resize(1200, 768);
    w.show();
    return a.exec();
}