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

#include <CircleMobility.h>

Inheritance diagram for CircleMobility:

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	cx
double	cy
double	r
double	omega
	angular velocity [rad/s], derived from speed and radius
double	updateInterval
	time interval to update the hosts position
bool	stationary
	if true, the host doesn't move
double	angle
	direction from the centre of the circle

Detailed Description

Circle movement model. See NED file for more info.

Author:: Andras Varga

Definition at line 31 of file CircleMobility.h.

Member Function Documentation

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

Called upon arrival of a self messages.

Implements BasicMobility.

Definition at line 58 of file CircleMobility.cc.

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

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

Initializes mobility model parameters.

Reimplemented from BasicMobility.

Definition at line 25 of file CircleMobility.cc.

{
    BasicMobility::initialize(stage);

    EV << "initializing CircleMobility stage " << stage << endl;

    if (stage == 1)
    {
        // read parameters
        cx = par("cx");
        cy = par("cy");
        r = par("r");
        ASSERT(r>0);
        angle = par("startAngle").doubleValue()/180.0*PI;
        updateInterval = par("updateInterval");
        double speed = par("speed");
        omega = speed/r;

        // calculate initial position
        pos.x = cx + r * cos(angle);
        pos.y = cy + r * sin(angle);
        updatePosition();

        // 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 CircleMobility::move ( ) [protected, virtual]

Move the host.

Definition at line 65 of file CircleMobility.cc.

Referenced by handleSelfMsg().

{
    angle += omega * updateInterval;
    pos.x = cx + r * cos(angle);
    pos.y = cy + r * sin(angle);

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