/* ----------------------------------------------------------------------------
 * body.hpp
 *
 * Copyright (c) 2017 Yann Herklotz Grave <ymherklotz@gmail.com> -- MIT License
 * See file LICENSE for more details
 * ----------------------------------------------------------------------------
 */

#ifndef YAGE_PHYSICS_BODY_HPP
#define YAGE_PHYSICS_BODY_HPP

#include "Math/matrix.hpp"

namespace yage {
class Body {
public:
	// gravity constant
	static const double GRAVITY;

protected:
	// center of mass of the object
	Vector2d position_ = Vector2d(0, 0);

	// mass of the object
	double mass_ = 1;

	// current velocity of the object
	Vector2d velocity_ = Vector2d(0, 0);

	// boolean that defines if gravity can act on the object
	bool gravity_ = true;

	// current acceleration
	Vector2d acceleration_ = Vector2d(0, 0);

	// force acting on the body
	Vector2d force_ = Vector2d(0, 0);

public:
	// apply force to the object and update the velocity
	virtual void applyForce(const Vector2d& force) = 0;
	virtual void update() = 0;

	double xPosition() const;
	double yPosition() const;

protected:
	// protected constructor to initialize member variables
	Body(const Vector2d& position = Vector2d(0, 0), double mass = 1, const Vector2d& velocity = Vector2d(0, 0), bool gravity = false);
};
}  // namespace yage

#endif