Linear movement model. See NED file for more info. More...

#include <LinearMobility.h>

Inheritance diagram for LinearMobility:

Protected Member Functions
virtual void	initialize (int)
	Initializes mobility model parameters.
virtual void	handleSelfMsg (cMessage *msg)
	Called upon arrival of a self messages.
virtual void	move ()
	Move the host.
Protected Attributes
double	speed
	speed of the host
double	angle
	angle of linear motion
double	acceleration
	acceleration of linear motion
double	updateInterval
	time interval to update the hosts position
bool	stationary
	if true, the host doesn't move

Detailed Description

Linear movement model. See NED file for more info.

Author:: Emin Ilker Cetinbas

Definition at line 32 of file LinearMobility.h.

Member Function Documentation

void LinearMobility::handleSelfMsg ( cMessage * msg ) [protected, virtual]

Called upon arrival of a self messages.

The only self message possible is to indicate a new movement. If host is stationary this function is never called.

Implements BasicMobility.

Definition at line 54 of file LinearMobility.cc.

{
    move();
    updatePosition();
    if (!stationary)
        scheduleAt(simTime() + updateInterval, msg);
}

void LinearMobility::initialize ( int stage ) [protected, virtual]

Initializes mobility model parameters.

Reimplemented from BasicMobility.

Definition at line 26 of file LinearMobility.cc.

{
    BasicMobility::initialize(stage);

    EV << "initializing LinearMobility stage " << stage << endl;

    if (stage == 0)
    {
        updateInterval = par("updateInterval");
        speed = par("speed");
        angle = par("angle");
        acceleration = par("acceleration");
        angle = fmod(angle,360);

        // if the initial speed is lower than 0, the node is stationary
        stationary = (speed == 0);

        // host moves the first time after some random delay to avoid synchronized movements
        if (!stationary)
            scheduleAt(simTime() + uniform(0, updateInterval), new cMessage("move"));
    }
}

void LinearMobility::move ( ) [protected, virtual]

Move the host.

Move the host if the destination is not reached yet. Otherwise calculate a new random position

Definition at line 66 of file LinearMobility.cc.

Referenced by handleSelfMsg().

{
    pos.x += speed * cos(PI * angle / 180) * updateInterval;
    pos.y += speed * sin(PI * angle / 180) * updateInterval;

    // do something if we reach the wall
    Coord dummy;
    handleIfOutside(REFLECT, dummy, dummy, angle);

    // accelerate
    speed += acceleration * updateInterval;
    if (speed <= 0)
    {
        speed = 0;
        stationary = true;
    }

    EV << " xpos= " << pos.x << " ypos=" << pos.y << " speed=" << speed << endl;
}