constant-acceleration-mobility-model.cc

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/*
 * 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: Gustavo Carneiro  <gjc@inescporto.pt>
 */
#include "constant-acceleration-mobility-model.h"
 
#include "ns3/simulator.h"
 
namespace ns3
{
 
NS_OBJECT_ENSURE_REGISTERED(ConstantAccelerationMobilityModel);
 
TypeId
ConstantAccelerationMobilityModel::GetTypeId()
{
    static TypeId tid = TypeId("ns3::ConstantAccelerationMobilityModel")
                            .SetParent<MobilityModel>()
                            .SetGroupName("Mobility")
                            .AddConstructor<ConstantAccelerationMobilityModel>();
    return tid;
}
 
ConstantAccelerationMobilityModel::ConstantAccelerationMobilityModel()
{
}
 
ConstantAccelerationMobilityModel::~ConstantAccelerationMobilityModel()
{
}
 
inline Vector
ConstantAccelerationMobilityModel::DoGetVelocity() const
{
    double t = (Simulator::Now() - m_baseTime).GetSeconds();
    return Vector(m_baseVelocity.x + m_acceleration.x * t,
                  m_baseVelocity.y + m_acceleration.y * t,
                  m_baseVelocity.z + m_acceleration.z * t);
}
 
inline Vector
ConstantAccelerationMobilityModel::DoGetPosition() const
{
    double t = (Simulator::Now() - m_baseTime).GetSeconds();
    double half_t_square = t * t * 0.5;
    return Vector(m_basePosition.x + m_baseVelocity.x * t + m_acceleration.x * half_t_square,
                  m_basePosition.y + m_baseVelocity.y * t + m_acceleration.y * half_t_square,
                  m_basePosition.z + m_baseVelocity.z * t + m_acceleration.z * half_t_square);
}
 
void
ConstantAccelerationMobilityModel::DoSetPosition(const Vector& position)
{
    m_baseVelocity = DoGetVelocity();
    m_baseTime = Simulator::Now();
    m_basePosition = position;
    NotifyCourseChange();
}
 
void
ConstantAccelerationMobilityModel::SetVelocityAndAcceleration(const Vector& velocity,
                                                              const Vector& acceleration)
{
    m_basePosition = DoGetPosition();
    m_baseTime = Simulator::Now();
    m_baseVelocity = velocity;
    m_acceleration = acceleration;
    NotifyCourseChange();
}
 
} // namespace ns3