#pragma once

#include <vector>
#include <QVector2D>
#include <QColor>
#include "Vector.h"
#include "GLWidget.h"

class QPainter;

class Pendulum {
public:
	explicit Pendulum(const std::vector<double> &M,
					  const std::vector<double> &L,
					  QColor color, double startAngle);

	void draw(QPainter*, double) const;
	void update(double, double);
private:
	friend class GLWidget;
	std::vector<Vector> X, V;
	std::vector<double> M, L;
	QColor color;
};