/**
 * @file Potentials.hpp
 * @author jun <jun@firmwarejun.net>
 * @brief Potentials declarations
 * @version 0.1
 * @date 2023-07-25
 *
 * Copyright (c) 2023 jun <https://git.firmwarejun.net/jun/MolecularDynamics2>
 *
 */

#pragma once

#include <cmath>

/**
 * @brief Potential generator base class
 *
 */
class Potential {
public:
  virtual double potential(double r) = 0;
  virtual double force(double r) = 0;
};

/**
 * @brief Lennard Jones potential generator
 *
 */
class LennardJones : public Potential {
public:
  double potential(double r) override {
    return 4 * (std::pow(r, -12) - std::pow(r, -6));
  }

  double force(double r) override {
    return 24 * (2 * std::pow(r, -13) - std::pow(r, -7));
  }
};