#include <vector>
#include <cstdint>
#include <QObject>
#include <chrono>

using namespace std::chrono;

class Pendulum;
class QPainter;
class QTimer;

class Simulation : public QObject {
public:
	explicit Simulation();

	double size = 50;

	double gravity {};
	double timescale {};
	int substeps {};

	int updateInterval = 17;

	bool isPlaying = false;

	std::vector<Pendulum *> pendula;

	QTimer * timer;

	void draw(QPainter*, int) const;
public slots:
	void clearPendula();
private slots:
	void update();
private:
	time_point<system_clock> lastUpdate;
};