penduledesc.h
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	#ifndef PENDULEDESC_H
	#define PENDULEDESC_H

	#include "descriptors/oscillateur.h"

	class PenduleDesc : public Oscillateur
	{
	double l[2];
	double m[2];
	double g;

	public:

	/* Constructors */

	PenduleDesc(double l1, double l2, double m1, double m2,
	const Vector& p, const Vector& pp, double g = 9.81);

	PenduleDesc(double l1, double l2, double m1, double m2,
	const std::vector<double>& p, const std::vector<double>& pp, double g = 9.81);

	/* set methods, index can be 0 or 1 */

	void setAngle(double l, int index);
	void setAngularSpeed(double l, int index);

	void setLength(double l, int index);
	void setMass(double m, int index);

	void setGravity(double);

	/* get methods */

	double getLength(int index) const;
	double getMass(int index) const;

	double getAngle(int index) const;
	double getAngularSpeed(int index) const;

	double getGravity() const;

	//retourne l'energie du système, utile pour le debugging
	double energy() const;

	double kineticEnergy(int index) const;

	protected:

	/* equation override */

	virtual Vector equation() const override;
	};

	#endif // PENDULEDESC_H