LineSegmentsMobilityBase Class Reference

#include <LineSegmentsMobilityBase.h>

Inheritance diagram for LineSegmentsMobilityBase:

List of all members.

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Detailed Description

Base class for mobility models where movement consists of a sequence of linear movements of constant speed.

Subclasses must redefine setTargetPosition() which is suppsed to set a new target position and target time once the previous one is reached.

Author:

Andras Varga

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	beginNextMove (cMessage *msg)
	Begin new line segment after previous one finished.
virtual void	setTargetPosition ()=0
	Should be redefined in subclasses. This method gets called when targetPos and targetTime has been reached, and its task is to set a new targetPos and targetTime. At the end of the movement sequence, it should set targetTime=0.
virtual void	fixIfHostGetsOutside ()=0
	Should be redefined in subclasses. Should invoke handleIfOutside(), or directly one of the methods it relies on.
Protected Attributes
double	updateInterval
	time interval to update the host's position
double	targetTime
	end time of current linear movement
Coord	targetPos
	end position of current linear movement
Coord	step
	step size (added to pos every updateInterval)
bool	stationary
	if set to true, host won't move

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Member Function Documentation

void LineSegmentsMobilityBase::beginNextMove (  cMessage *  msg  )  [protected, virtual]

Begin new line segment after previous one finished. { // go to exact position where previous statement was supposed to finish pos = targetPos; simtime_t now = targetTime; // choose new targetTime and targetPos setTargetPosition(); if (targetTime<now) error("LineSegmentsMobilityBase: targetTime<now was set in %s's beginNextMove()", className()); if (stationary) { // end of movement step.x = step.y = 0; delete msg; } else if (targetPos==pos) { // no movement, just wait step.x = step.y = 0; scheduleAt(Max(targetTime,simTime()), msg); } else { // keep moving double numIntervals = (targetTime-now) / updateInterval; // int numSteps = floor(numIntervals); -- currently unused, // although we could use step counting instead of comparing // simTime() to targetTime each step. // Note: step = speed*updateInterval = distance/time*updateInterval = // = (targetPos-pos) / (targetTime-now) * updateInterval = // = (targetPos-pos) / numIntervals step = (targetPos - pos) / numIntervals; scheduleAt(simTime() + updateInterval, msg); } }

virtual void LineSegmentsMobilityBase::fixIfHostGetsOutside (   )  [protected, pure virtual]

Should be redefined in subclasses. Should invoke handleIfOutside(), or directly one of the methods it relies on. Implemented in ANSimMobility, BonnMotionMobility, RandomWPMobility, and TurtleMobility.

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

Called upon arrival of a self messages. Reimplemented from BasicMobility. { if (stationary) { delete msg; return; } else if (simTime()+updateInterval >= targetTime) { beginNextMove(msg); } else { scheduleAt(simTime() + updateInterval, msg); } // update position pos += step; // do something if we reach the wall fixIfHostGetsOutside(); //EV << " xpos=" << pos.x << " ypos=" << pos.y << endl; updatePosition(); }

void LineSegmentsMobilityBase::initialize (  int   )  [protected, virtual]

Initializes mobility model parameters. Reimplemented from BasicMobility. Reimplemented in ANSimMobility, BonnMotionMobility, RandomWPMobility, and TurtleMobility. { BasicMobility::initialize(stage); if (stage == 1) { updateInterval = par("updateInterval"); stationary = false; targetPos = pos; targetTime = simTime(); // host moves the first time after some random delay to avoid synchronized movements scheduleAt(simTime() + uniform(0, updateInterval), new cMessage("move")); } }

virtual void LineSegmentsMobilityBase::setTargetPosition (   )  [protected, pure virtual]

Should be redefined in subclasses. This method gets called when targetPos and targetTime has been reached, and its task is to set a new targetPos and targetTime. At the end of the movement sequence, it should set targetTime=0. Implemented in ANSimMobility, BonnMotionMobility, RandomWPMobility, and TurtleMobility.

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Member Data Documentation

bool LineSegmentsMobilityBase::stationary [protected]

if set to true, host won't move

Coord LineSegmentsMobilityBase::step [protected]

step size (added to pos every updateInterval)

Coord LineSegmentsMobilityBase::targetPos [protected]

end position of current linear movement

double LineSegmentsMobilityBase::targetTime [protected]

end time of current linear movement

double LineSegmentsMobilityBase::updateInterval [protected]

time interval to update the host's position

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The documentation for this class was generated from the following files:

• LineSegmentsMobilityBase.h
• LineSegmentsMobilityBase.cc

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