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constant-acceleration-mobility-model.cc
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * This program is free software; you can redistribute it and/or modify
4  * it under the terms of the GNU General Public License version 2 as
5  * published by the Free Software Foundation;
6  *
7  * This program is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  * GNU General Public License for more details.
11  *
12  * You should have received a copy of the GNU General Public License
13  * along with this program; if not, write to the Free Software
14  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15  *
16  * Author: Gustavo Carneiro <gjc@inescporto.pt>
17  */
18 #include "constant-acceleration-mobility-model.h"
19 #include "ns3/simulator.h"
20 
21 namespace ns3 {
22 
23 NS_OBJECT_ENSURE_REGISTERED (ConstantAccelerationMobilityModel);
24 
25 TypeId ConstantAccelerationMobilityModel::GetTypeId (void)
26 {
27  static TypeId tid = TypeId ("ns3::ConstantAccelerationMobilityModel")
28  .SetParent<MobilityModel> ()
29  .AddConstructor<ConstantAccelerationMobilityModel> ();
30  return tid;
31 }
32 
33 ConstantAccelerationMobilityModel::ConstantAccelerationMobilityModel ()
34 {
35 }
36 
37 ConstantAccelerationMobilityModel::~ConstantAccelerationMobilityModel ()
38 {
39 }
40 
41 inline Vector
42 ConstantAccelerationMobilityModel::DoGetVelocity (void) const
43 {
44  double t = (Simulator::Now () - m_baseTime).GetSeconds ();
45  return Vector (m_baseVelocity.x + m_acceleration.x*t,
46  m_baseVelocity.y + m_acceleration.y*t,
47  m_baseVelocity.z + m_acceleration.z*t);
48 }
49 
50 inline Vector
51 ConstantAccelerationMobilityModel::DoGetPosition (void) const
52 {
53  double t = (Simulator::Now () - m_baseTime).GetSeconds ();
54  double half_t_square = t*t*0.5;
55  return Vector (m_basePosition.x + m_baseVelocity.x*t + m_acceleration.x*half_t_square,
56  m_basePosition.y + m_baseVelocity.y*t + m_acceleration.y*half_t_square,
57  m_basePosition.z + m_baseVelocity.z*t + m_acceleration.z*half_t_square);
58 }
59 
60 void
61 ConstantAccelerationMobilityModel::DoSetPosition (const Vector &position)
62 {
63  m_baseVelocity = DoGetVelocity ();
64  m_baseTime = Simulator::Now ();
65  m_basePosition = position;
66  NotifyCourseChange ();
67 }
68 
69 void
70 ConstantAccelerationMobilityModel::SetVelocityAndAcceleration (const Vector &velocity,
71  const Vector &acceleration)
72 {
73  m_basePosition = DoGetPosition ();
74  m_baseTime = Simulator::Now ();
75  m_baseVelocity = velocity;
76  m_acceleration = acceleration;
77  NotifyCourseChange ();
78 }
79 
80 
81 } // namespace ns3