/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2007 INRIA

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation;

 *

 * 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

 *

 * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>

 */

#ifndef SPEED_H

#define SPEED_H

namespace ns3 {

/**

 * \brief keep track of 3d cartesian speed vectors

 *

 * Unit is meters/s.

 */

class Speed 

{

public:

  /**

   * \param _dx x coordinate of speed vector

   * \param _dy y coordinate of speed vector

   * \param _dz z coordinate of speed vector

   *

   * Create speed vector (_dx, _dy, _dz)

   */

  Speed (double _dx, double _dy, double _dz);

  /**

   * Create speed vector (0.0, 0.0, 0.0)

   */

  Speed ();

  /**

   * x coordinate of speed vector

   */

  double dx;

  /**

   * y coordinate of speed vector

   */

  double dy;

  /**

   * z coordinate of speed vector

   */

  double dz;

};

} // namespace ns3

#endif /* SPEED_H */