#include <vector>
#include <cstdint>

class Pendulum;
class QPainter;

class Simulation {
public:
	explicit Simulation();

	double size = 50;

	double gravity;
	double timescale;
	int substeps;

	bool isPlaying = false;

	std::vector<Pendulum *> pendula;

	void draw(QPainter*, int) const;
};