movement

Class ModifiedRandomDirection

java.lang.Object

movement.MovementModel

movement.RandomDirection

movement.ModifiedRandomDirection

public class ModifiedRandomDirection
extends RandomDirection

Modified Random Direction movement model as described in: Elizabeth M. Royer, P. Michael Melliar-Smith, and Louise E. Moser, "An Analysis of the Optimum Node Density for Ad hoc Mobile Networks"

Similar to RandomDirection, except nodes will not move all the way to the edge. Instead they will pick a random direction and move in that direction for a random distance before pausing and picking another direction.

Field Summary

Fields inherited from class movement.MovementModel

comBus, DEF_SPEEDS, DEF_WAIT_TIMES, host, maxSpeed, maxWaitTime, minSpeed, minWaitTime, MOVEMENT_MODEL_NS, rng, RNG_SEED, SPEED, WAIT_TIME, WORLD_SIZE

Constructor Summary

Constructors

Constructor and Description
ModifiedRandomDirection(ModifiedRandomDirection other)
ModifiedRandomDirection(Settings settings)

Method Summary

Methods

Modifier and Type	Method and Description
protected double	getTravelFraction() Returns the fraction of the path to follow towards the edge.
MovementModel	replicate() Creates a replicate of the movement model.

Methods inherited from class movement.RandomDirection

getInitialLocation, getPath

Methods inherited from class movement.MovementModel

generateSpeed, generateWaitTime, getComBus, getHost, getMaxX, getMaxY, isActive, nextPathAvailable, reset, setComBus, setHost, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ModifiedRandomDirection

public ModifiedRandomDirection(Settings settings)

ModifiedRandomDirection

public ModifiedRandomDirection(ModifiedRandomDirection other)

Method Detail

getTravelFraction

protected double getTravelFraction()

Description copied from class: RandomDirection

Returns the fraction of the path to follow towards the edge. This is called after the direction of travel has been picked and the path towards the edge calculated. Returning 1.0 causes the node to travel all the way to the edge, returning 0.5 would cause the node to travel half way, etc.

Overrides:

getTravelFraction in class RandomDirection

Returns:

the fraction of the path to follow towards the edge of the simulation area

replicate

public MovementModel replicate()

Description copied from class: MovementModel

Creates a replicate of the movement model.

Overrides:

replicate in class RandomDirection

Returns:

A new movement model with the same settings as this model