size_2d.h

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// -*-c++-*-

 
/*
 *Copyright:
 
 Copyright (C) Hidehisa AKIYAMA
 
 This code 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 3 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 *EndCopyright:
 */

 
#ifndef RCSC_GEOM_SIZE2D_H
#define RCSC_GEOM_SIZE2D_H
 
#include <ostream>
#include <cmath>
 
namespace rcsc {

class Size2D {
private:
    double M_length;

    double M_width;
 
public:

    Size2D()
        : M_length( 0.0 )
        , M_width( 0.0 )
      { }

    Size2D( const double & length,
            const double & width )
        : M_length( std::fabs( length ) )
        , M_width( std::fabs( width ) )
      { }

    const
    Size2D & assign( const double & length,
                     const double & width )
      {
          M_length = std::fabs( length );
          M_width = std::fabs( width );
          return *this;
      }

    const
    Size2D & setLength( const double & length )
      {
          M_length = std::fabs( length );
          return *this;
      }

    const
    Size2D & setWidth( const double & width )
      {
          M_width = std::fabs( width );
          return *this;
      }

    const
    double & length() const
      {
          return M_length;
      }

    const
    double & width() const
      {
          return M_width;
      }

    double diagonal() const
      {
          return std::sqrt( length() * length()
                            + width() * width() );
      }

    std::ostream & print( std::ostream & os ) const
      {
          os << "(" << length() << ", " << width() << ")";
          return os;
      }
 
};
 
} // end of namespace
 
#endif