#include <iostream>
#include <list>
#include <math.h>
#include <SFML/Graphics.hpp>

sf::Shape build_ngon(int n, float radius)
{
    sf::Shape s;
    for (int i = 0; i < n; i++)
    {
        float angle = i * 2.0 * M_PI / n;
        float x = radius * cos(angle);
        float y = radius * sin(angle);
        s.AddPoint(x, y, sf::Color(255, 128, 0), sf::Color(0, 0, 100));
    }
    s.SetColor(sf::Color(255, 255, 255, 255));
    s.SetOutlineWidth(4);
    return s;
}

int main()
{
    sf::Clock Clock;
    sf::RenderWindow App(sf::VideoMode(800, 600, 32), "SFML Graphics");
//    App.UseVerticalSync(true);
//    App.SetActive();
    std::list<sf::Shape> shapes;

    for (int n = 3, x = 0; x < 4; x++)
    {
        for (int y = 0; y < 3; y++, n++)
        {
            sf::Shape s = build_ngon(n, 75);
            s.Move(200 * x + 100, 200 * y + 100);
            shapes.push_back(s);
        }
    }

    float last_time = Clock.GetElapsedTime();
    while (App.IsOpened())
    {
        float ticks = Clock.GetElapsedTime();
        float elapsed = ticks - last_time;
        sf::Event Event;
        while (App.GetEvent(Event))
        {
            if (Event.Type == sf::Event::Closed)
                App.Close();

            if ( (Event.Type == sf::Event::KeyPressed)
                    && (Event.Key.Code == sf::Key::Escape) )
                App.Close();
        }

        App.Clear(sf::Color(0, 0, 0));

        for (std::list<sf::Shape>::iterator it = shapes.begin();
                it != shapes.end();
                it++)
        {
            it->Rotate(360.0 / 4 * elapsed);
            App.Draw(*it);
        }

        App.Display();
        last_time = ticks;
    }

    return EXIT_SUCCESS;
}