/* -*- 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 RANDOM_DIRECTION_MOBILITY_MODEL_H

#define RANDOM_DIRECTION_MOBILITY_MODEL_H

#include "ns3/object.h"

#include "ns3/ptr.h"

#include "ns3/nstime.h"

#include "ns3/event-id.h"

#include "ns3/rectangle.h"

#include "ns3/random-variable-stream.h"

#include "mobility-model.h"

#include "constant-velocity-helper.h"

namespace ns3 {

/**

 * \ingroup mobility

 * \brief Random direction mobility model.

 *

 * The movement of objects is based on random directions: each object

 * pauses for a specific delay, chooses a random direction and speed and 

 * then travels in the specific direction until it reaches one of

 * the boundaries of the model. When it reaches the boundary, it pauses,

 * selects a new direction and speed, aso.

 */

class RandomDirection2dMobilityModel : public MobilityModel

{

public:

  static TypeId GetTypeId (void);

  RandomDirection2dMobilityModel ();

private:

  void ResetDirectionAndSpeed (void);

  void BeginPause (void);

  void SetDirectionAndSpeed (double direction);

  void DoInitializePrivate (void);

  virtual void DoDispose (void);

  virtual void DoInitialize (void);

  virtual Vector DoGetPosition (void) const;

  virtual void DoSetPosition (const Vector &position);

  virtual Vector DoGetVelocity (void) const;

  virtual int64_t DoAssignStreams (int64_t);

};

} // namespace ns3

#endif /* RANDOM_DIRECTION_MOBILITY_MODEL_H */