body.hpp

/* ----------------------------------------------------------------------------
 * 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