newton.h
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	#ifndef NEWTON_H
	#define NEWTON_H

	#include "descriptor.h"
	#include "svector.h"

	class NewtonDescriptor : public Descriptor
	{
	/* Attributes */
	double mass;

	SVector<3> position;
	SVector<3> speed;

	SVector<3> forces;

	public:

	/* Constructors and destractors */
	NewtonDescriptor( const double& mass = 1.0,
	const SVector<3>& position = SVector<3>::nullv,
	const SVector<3>& speed = SVector<3>::nullv);

	NewtonDescriptor(const NewtonDescriptor&);

	~NewtonDescriptor() {}

	virtual void update(float) override;

	/* Set and Get methods */

	double getMass() const;
	const SVector<3>& getPosition() const;
	const SVector<3>& getSpeed() const;
	const SVector<3>& getForces() const;

	void setMass(const double&);
	void setPosition(const SVector<3>&);
	void setSpeed(const SVector<3>&);
	void setForces(const SVector<3>&);

	/* operateurs pour ajouter ou annuller des forces sur la particule*/
	void operator+=(const SVector<3>&);
	void operator+(const SVector<3>&);
	void operator-=(const SVector<3>&);
	void operator-(const SVector<3>&);


	static const double sq_speed_zero;

	};

	#endif // NEWTON_H