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

/*

 * Copyright (c) 2006,2007 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 CONSTANT_VELOCITY_HELPER_H

#define CONSTANT_VELOCITY_HELPER_H

#include "ns3/nstime.h"

#include "vector.h"

namespace ns3 {

class Rectangle;

class ConstantVelocityHelper

{

 public:

  ConstantVelocityHelper ();

  ConstantVelocityHelper (const Vector &position);

  ConstantVelocityHelper (const Vector &position,

		     const Vector &vel);

  void SetPosition (const Vector &position);

  Vector GetCurrentPosition (void) const;

  Vector GetVelocity (void) const;

  void SetVelocity (const Vector &vel);

  void Pause (void);

  void Unpause (void);

  void UpdateWithBounds (const Rectangle &rectangle) const;

  void Update (void) const;

 private:

  mutable Time m_lastUpdate;

  mutable Vector m_position;

  Vector m_velocity;

  bool m_paused;

};

} // namespace ns3

#endif /* CONSTANT_VELOCITY_HELPER_H */