Cord.h

#pragma once
/*
 * Copyright 2010-2016 OpenXcom Developers.
 *
 * This file is part of OpenXcom.
 *
 * OpenXcom 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.
 *
 * OpenXcom 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 OpenXcom.  If not, see <http://www.gnu.org/licenses/>.
 */
#include "../fmath.h"

namespace OpenXcom
{

struct Cord;

struct CordPolar
{
    double lon, lat;

    inline CordPolar(double plon, double plat)
    {
        lon = plon;
        lat = plat;
    }
    inline CordPolar(const CordPolar& pol)
    {
        lon = pol.lon;
        lat = pol.lat;
    }
    inline CordPolar()
    {
        lon = 0;
        lat = 0;
    }
    explicit inline CordPolar(const Cord&);
};

struct Cord
{
    double x, y, z;

    inline Cord(double px, double py, double pz)
    {
        x = px;
        y = py;
        z = pz;
    }
    inline Cord(const Cord& c)
    {
        x = c.x;
        y = c.y;
        z = c.z;
    }
    inline Cord()
    {
        x = 0.0;
        y = 0.0;
        z = 0.0;
    }
    explicit inline Cord(const CordPolar&);

    inline Cord operator +()
    {
        return *this;
    }
    inline Cord operator -()
    {
        return Cord(-x, -y, -z);
    }
    inline Cord& operator *=(double d)
    {
        x *= d;
        y *= d;
        z *= d;
        return *this;
    }
    inline Cord& operator /=(double d)
    {
        double re = 1./d;
        x *= re;
        y *= re;
        z *= re;
        return *this;
    }
    inline Cord& operator +=(const Cord& c)
    {
        x += c.x;
        y += c.y;
        z += c.z;
        return *this;
    }
    inline Cord& operator -=(const Cord& c)
    {
        x -= c.x;
        y -= c.y;
        z -= c.z;
        return *this;
    }
    inline bool operator ==(const Cord& c)
    {
        return AreSame(x, c.x) && AreSame(y, c.y) && AreSame(z, c.z);
    }

    inline double norm() const
    {
        return std::sqrt(x*x + y*y + z*z);
    }
};

inline Cord::Cord(const CordPolar& pol)
{
    x = std::sin(pol.lon) * std::cos(pol.lat);
    y = std::sin(pol.lat);
    z = std::cos(pol.lon) * std::cos(pol.lat);
}

inline CordPolar::CordPolar(const Cord& c)
{
    double inv = 1/c.norm();
    lat = asin(c.y * inv);
    lon = atan2(c.x, c.z);
}

}//namespace OpenXcom