/*
  Copyright 2013--2018 James E. McClure, Virginia Polytechnic & State University
  Copyright Equnior ASA

  This file is part of the Open Porous Media project (OPM).
  OPM is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  OPM is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  You should have received a copy of the GNU General Public License
  along with OPM.  If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef Distance_H_INC
#define Distance_H_INC

#include "common/Domain.h"
#include "common/Array.hpp"

struct Vec {
    double x;
    double y;
    double z;
    inline Vec() : x(0), y(0), z(0) {}
    inline Vec(double x_, double y_, double z_) : x(x_), y(y_), z(z_) {}
    inline double norm() const { return sqrt(x * x + y * y + z * z); }
    inline double norm2() const { return x * x + y * y + z * z; }
};
inline bool operator<(const Vec &l, const Vec &r) {
    return l.x * l.x + l.y * l.y + l.z * l.z <
           r.x * r.x + r.y * r.y + r.z * r.z;
}

/*!
 * @brief  Calculate the distance using a simple method
 * @details  This routine calculates the vector distance to the nearest domain surface.
 * @param[out] Distance     Distance function
 * @param[in] ID            Segmentation id
 * @param[in] Dm            Domain information
 * @param[in] periodic      Directions that are periodic
 * @param[in] dx            Cell size
 */
template <class TYPE>
void CalcDist(Array<TYPE> &Distance, const Array<char> &ID, const Domain &Dm,
              const std::array<bool, 3> &periodic = {true, true, true},
              const std::array<double, 3> &dx = {1, 1, 1});

/*!
 * @brief  Calculate the distance using a simple method
 * @details  This routine calculates the vector distance to the nearest domain surface.
 * @param[out] Distance     Distance function
 * @param[in] ID            Domain id
 * @param[in] Dm            Domain information
 * @param[in] periodic      Directions that are periodic
 * @param[in] dx            Cell size
 */
void CalcVecDist(Array<Vec> &Distance, const Array<int> &ID, const Domain &Dm,
                 const std::array<bool, 3> &periodic = {true, true, true},
                 const std::array<double, 3> &dx = {1, 1, 1});

#endif