mapnik/include/mapnik/coord.hpp

/*****************************************************************************
 * 
 * This file is part of Mapnik (c++ mapping toolkit)
 *
 * Copyright (C) 2006 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
 *
 *****************************************************************************/

//$Id: coord.hpp 39 2005-04-10 20:39:53Z pavlenko $

#ifndef COORD_HPP
#define COORD_HPP

#include <boost/operators.hpp>
#include <iomanip>
#include <sstream>

namespace mapnik {   
    template <typename T,int dim>
    struct coord {
        typedef T type;
    };
    
    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 > > > > > >
                    
    {
        typedef T type;
        T x;
        T y;
    public:
        coord()
            : x(),y() {}
        coord(T x,T y)
            : x(x),y(y) {}
        template <typename T2>
        coord (const coord<T2,2>& rhs)
            : x(type(rhs.x)),
              y(type(rhs.y)) {}

        template <typename T2>
        coord<T,2>& operator=(const coord<T2,2>& rhs)
        {
            if ((void*)this==(void*)&rhs)
            {
                return *this;
            }
            x=type(rhs.x);
            y=type(rhs.y);
            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;
        }
    };

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

        template <typename T2>
        coord<T,3>& operator=(const coord<T2,3>& rhs)
        {
            if ((void*)this==(void*)&rhs)
            {
                return *this;
            }
            x=type(rhs.x);
            y=type(rhs.y);
            z=type(rhs.z);
            return *this;
        }
    };

    typedef coord<double,2> coord2d;
    typedef coord<int,2> coord2i;

     
    template <typename charT,typename traits,typename T ,int dim>
    inline std::basic_ostream<charT,traits>&
    operator << (std::basic_ostream<charT,traits>& out,
                 const coord<T,dim>& c);
    
    template <typename charT,typename traits,typename T>
    inline std::basic_ostream<charT,traits>&
    operator << (std::basic_ostream<charT,traits>& out,
                 const coord<T,2>& c)
    {
        std::basic_ostringstream<charT,traits> s;
        s.copyfmt(out);
        s.width(0);
        s << "coord2(" << std::setprecision(16) 
          << c.x << "," << c.y<< ")";
        out << s.str();
        return out;
    }

    template <typename charT,typename traits,typename T>
    inline std::basic_ostream<charT,traits>&
    operator << (std::basic_ostream<charT,traits>& out,
                 const coord<T,3>& c)
    {
        std::basic_ostringstream<charT,traits> s;
        s.copyfmt(out);
        s.width(0);
        s << "coord3(" << std::setprecision(16) 
          << c.x << "," << c.y<< "," << c.z<<")";
        out << s.str();
        return out;
    } 
}

#endif // COORD_HPP