NS-3 based Named Data Networking (NDN) simulator
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spring-mobility-model.h
1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2006, 2007 INRIA
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20 #ifndef SPRING_MOBILITY_MODEL_H
21 #define SPRING_MOBILITY_MODEL_H
22 
23 #include "ns3/mobility-model.h"
24 #include "ns3/nstime.h"
25 #include "ns3/event-id.h"
26 
27 namespace ns3 {
28 
34 class SpringMobilityModel : public MobilityModel
35 {
36 public:
37  static TypeId GetTypeId (void);
38 
42  SpringMobilityModel ();
43  virtual ~SpringMobilityModel ();
44 
49  void
50  AddSpring (Ptr<MobilityModel> node);
51 
52 private:
53  // from Object
54  virtual void
55  DoStart ();
56 
57  // from MobilityModel
58  virtual Vector
59  DoGetPosition (void) const;
60 
61  virtual void
62  DoSetPosition (const Vector &position);
63 
64  virtual Vector
65  DoGetVelocity (void) const;
66 
67  // Updating positions
68  void
69  Update (void) const;
70 
71  static void
72  UpdateAll ();
73 
74 private:
75  static double m_epsilon;
76 
77  double m_nodeMass;
78  double m_nodeCharge;
79  double m_springNormalLength;
80  double m_springConstant;
81  double m_dampingFactor;
82 
83  static double m_totalKineticEnergy;
84  static bool m_stable;
85  static EventId m_updateEvent;
86 
87  mutable Vector m_position;
88  mutable Vector m_velocity;
89  mutable Time m_lastTime;
90 
91  std::list<Ptr<MobilityModel> > m_springs;
92 };
93 
94 } // namespace ns3
95 
96 #endif // SPRING_MOBILITY_MODEL_H