Vertex.hpp

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//  This file is part of ff3d - http://www.freefem.org/ff3d
//  Copyright (C) 2001, 2002, 2003 Stéphane Del Pino

//  This program 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 2, or (at your option)
//  any later version.

//  This program 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 this program; if not, write to the Free Software Foundation,
//  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  

//  $Id: Vertex.hpp,v 1.6 2007/06/09 10:37:06 delpinux Exp $

// This class provides tools to manipulate vertices living in R^3.

#ifndef VERTEX_HPP
#define VERTEX_HPP

#include <TinyVector.hpp>
#include <StreamCenter.hpp>

class Vertex
  : public TinyVector<3, real_t>
{
 private:
  size_t __reference;           
 public:
  inline bool operator == (const Vertex& V) const
  {
    return (&V == this);
  }

  inline const Vertex& operator = (const Vertex& V)
  {
    TinyVector<3, real_t>::operator = (V);
    __reference = V.__reference;
    return (*this);
  }

  inline real_t& x()
  {
    return (*this)[0];
  }

  inline real_t& y()
  {
    return (*this)[1];
  }


  inline real_t& z()
  {
    return (*this)[2];
  }

  inline const real_t& x() const
  {
    return (*this)[0];
  }

  inline const real_t& y() const
  {
    return (*this)[1];
  }

  inline const real_t& z() const
  {
    return (*this)[2];
  }

  inline size_t& reference()
  {
    return __reference;
  }

  inline const size_t& reference() const
  {
    return __reference;
  }

  Vertex()
    : TinyVector<3, real_t>(0,0,0),
      __reference(0)
  {
    ;
  }

  Vertex(const real_t& x,
         const real_t& y,
         const real_t& z,
         const size_t& reference = 0)
    : TinyVector<3, real_t>(x,y,z),
      __reference(reference)
  {
    ;
  }

  Vertex(const TinyVector<3, real_t>& v,
         const size_t& reference=0)
    : TinyVector<3, real_t>(v),
      __reference(reference)
  {
    ;
  }

  Vertex(const Vertex& v)
    : TinyVector<3, real_t>(v),
      __reference(v.__reference)
  {
    ;
  }

  ~Vertex()
  {
    ;
  }

  inline real_t distance(const TinyVector<3, real_t>& V) const
  {
    return std::sqrt((V[0]-x())*(V[0]-x())
                     +(V[1]-y())*(V[1]-y())
                     +(V[2]-z())*(V[2]-z()));
  }

  inline real_t distance2(const TinyVector<3, real_t>& V) const
  {
    return ((V[0]-x())*(V[0]-x())
            +(V[1]-y())*(V[1]-y())
            +(V[2]-z())*(V[2]-z()));
  }


  friend std::ostream& operator<< (std::ostream& os,
                                   const Vertex& V);
};


#endif // VERTEX_HPP

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