mapnik/include/mapnik/coord.hpp

/*****************************************************************************
 *
 * This file is part of Mapnik (c++ mapping toolkit)
 *
 * Copyright (C) 2021 Artem Pavlenko
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *****************************************************************************/

#ifndef MAPNIK_COORD_HPP
#define MAPNIK_COORD_HPP

#include <mapnik/warning.hpp>
MAPNIK_DISABLE_WARNING_PUSH
#include <mapnik/warning_ignore.hpp>
#include <boost/operators.hpp>
MAPNIK_DISABLE_WARNING_POP

namespace mapnik {
template<typename T, int dim>
struct coord
{
    using type = T;
};

template<typename T>
struct coord<T, 2>
    : boost::addable<
        coord<T, 2>,
        boost::addable2<
          coord<T, 2>,
          T,
          boost::subtractable<
            coord<T, 2>,
            boost::
              subtractable2<coord<T, 2>, T, boost::dividable2<coord<T, 2>, T, boost::multipliable2<coord<T, 2>, T>>>>>>

{
    using type = T;
    T x;
    T y;

  public:
    coord()
        : x()
        , y()
    {}
    coord(T x_, T y_)
        : x(x_)
        , y(y_)
    {}

    coord(coord<T, 2> const& rhs)
        : x(rhs.x)
        , y(rhs.y)
    {}

    template<typename T2>
    coord(coord<T2, 2> const& rhs)
        : x(type(rhs.x))
        , y(type(rhs.y))
    {}

    coord(coord<T, 2>&& rhs) noexcept
        : x(std::move(rhs.x))
        , y(std::move(rhs.y))
    {}

    coord<T, 2>& operator=(coord<T, 2> rhs)
    {
        swap(rhs);
        return *this;
    }

    template<typename T2>
    coord<T, 2>& operator=(const coord<T2, 2>& rhs)
    {
        coord<T, 2> tmp(rhs);
        swap(rhs);
        return *this;
    }

    template<typename T2>
    bool operator==(coord<T2, 2> const& rhs)
    {
        return x == rhs.x && y == rhs.y;
    }

    coord<T, 2>& operator+=(coord<T, 2> const& rhs)
    {
        x += rhs.x;
        y += rhs.y;
        return *this;
    }

    coord<T, 2>& operator+=(T rhs)
    {
        x += rhs;
        y += rhs;
        return *this;
    }

    coord<T, 2>& operator-=(coord<T, 2> const& rhs)
    {
        x -= rhs.x;
        y -= rhs.y;
        return *this;
    }

    coord<T, 2>& operator-=(T rhs)
    {
        x -= rhs;
        y -= rhs;
        return *this;
    }

    coord<T, 2>& operator*=(T t)
    {
        x *= t;
        y *= t;
        return *this;
    }
    coord<T, 2>& operator/=(T t)
    {
        x /= t;
        y /= t;
        return *this;
    }

  private:
    void swap(coord<T, 2>& rhs)
    {
        std::swap(this->x, rhs.x);
        std::swap(this->y, rhs.y);
    }
};

template<typename T>
struct coord<T, 3>
{
    using type = T;
    T x;
    T y;
    T z;

  public:
    coord()
        : x()
        , y()
        , z()
    {}
    coord(T x_, T y_, T z_)
        : x(x_)
        , y(y_)
        , z(z_)
    {}

    template<typename T2>
    coord(coord<T2, 3> const& rhs)
        : x(type(rhs.x))
        , y(type(rhs.y))
        , z(type(rhs.z))
    {}

    coord(coord<T, 3>&& rhs) noexcept
        : x(std::move(rhs.x))
        , y(std::move(rhs.y))
        , z(std::move(rhs.z))
    {}

    coord<T, 3> operator=(coord<T, 3> rhs)
    {
        swap(rhs);
        return *this;
    }

    template<typename T2>
    coord<T, 3>& operator=(coord<T2, 3> const& rhs)
    {
        coord<T, 3> tmp(rhs);
        swap(tmp);
        return *this;
    }

  private:
    void swap(coord<T, 3>& rhs)
    {
        std::swap(this->x, rhs.x);
        std::swap(this->y, rhs.y);
        std::swap(this->z, rhs.z);
    }
};

using coord2d = coord<double, 2>;
using coord2f = coord<float, 2>;
using coord2i = coord<int, 2>;

} // namespace mapnik

#endif // MAPNIK_COORD_HPP