95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2006,2007 INRIA
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
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*/
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#ifndef RANDOM_WALK_POSITION_H
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#define RANDOM_WALK_POSITION_H
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#include "ns3/object.h"
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#include "ns3/position.h"
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#include "ns3/nstime.h"
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#include "ns3/random-variable.h"
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namespace ns3 {
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class RandomWalkPositionParameters : public Object
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{
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public:
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enum Mode {
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MODE_DISTANCE,
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MODE_TIME
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};
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RandomWalkPositionParameters ();
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bool IsDefault (void) const;
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void SetSpeedBounds (double minSpeed, double maxSpeed);
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private:
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friend class RandomWalkPosition;
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double m_xMin;
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double m_xMax;
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double m_yMin;
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double m_yMax;
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double m_minSpeed;
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double m_maxSpeed;
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enum Mode m_mode;
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double m_modeDistance;
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Time m_modeTime;
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};
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/**
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* \brief a random walk position model
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*
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* Each instance moves with a speed and direction choosen at random
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* in the intervals [minspeed,maxspeed] and [0,2pi] until
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* either a fixed distance has been walked or until a fixed period
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* of time.
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*/
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class RandomWalkPosition : public Position
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{
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public:
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/**
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* Create a new position object located at a random
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* position within the default random walk area.
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*/
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RandomWalkPosition ();
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RandomWalkPosition (double x, double y);
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RandomWalkPosition (Ptr<RandomWalkPositionParameters> parameters);
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RandomWalkPosition (Ptr<RandomWalkPositionParameters> parameters,
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double x, double y);
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private:
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virtual void DoGet (double &x, double &y, double &z) const;
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virtual void DoSet (double x, double y, double z);
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void Reset (void);
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void Update (void) const;
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static Ptr<RandomWalkPositionParameters> GetDefaultParameters (void);
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static UniformVariable m_randomDirection;
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mutable double m_x;
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mutable double m_y;
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double m_dx;
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double m_dy;
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mutable Time m_prevTime;
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Ptr<RandomWalkPositionParameters> m_parameters;
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};
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} // namespace ns3
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#endif /* RANDOM_WALK_POSITION_H */
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