Mobility/MobilityModels: RandomDistance.pl

# Author: Mete Rodoper

# Difference between random walk with wrapping and this one is; this has $runningTime limitation.
# For more detail refer the How to code and use Various Mobility Model Scripts to Emulate Mobility at ORBIT tutorial

#!/usr/bin/perl

use Math::Round qw(:all);
use Math::Trig 'deg2rad';

#############################################################################################################
######################################## Input the values below #############################################
#############################################################################################################

$sourceXValue = 2; # Source X value
$sourceYValue = 2; # Source Y value

$walkDuration = 1000;  # Walk duration in unit time in one direction. When this time elapses change direcion
$speed = 100; # Average speed of the VMs 
$angle = 360; # Angle randomness of the movements
$randomnessInterval = 2;  # Maximum distance that a node can jump at an iteration
$numberOfStops = 50; # Number of destinations before script terminates
$runningTime = 100; # Running time bound for the script. when this equals to 0, program terminates

#############################################################################################################
#############################################################################################################
#############################################################################################################

$mobileNumber = 0;
$previousNode = "";

$numberOfStopsMax = $numberOfStops;
$mobileNumberIterator = $mobileNumber;
$intervalTime = 0;

$pointX = $sourceXValue;
$pointY = $sourceYValue;

$endMainLoop = 0;

while ($numberOfStops > 0 && $endMainLoop == 0)
{
        $speedChosen = int(rand($speed));
        $angleChosen = int(rand($angle));
        
        $angleRad = deg2rad($angleChosen);

        $noOfHops = $walkDuration/$speed;

        while ($noOfHops > 0 && $endMainLoop == 0)
        {
                $pointX = $pointX + cos($angleRad);
                $pointY = $pointY + sin($angleRad);

                $fractionX = abs($pointX - int($pointX));
                $fractionY = abs($pointY - int($pointY));

                $firstQuarter = $fractionY * $fractionY + $fractionX * $fractionX;
                $secondQuarter = $fractionY * $fractionY + (1-$fractionX) * (1-$fractionX);
                $thirdQuarter = (1-$fractionY) * (1-$fractionY) + (1-$fractionX) * (1-$fractionX);
                $fourthQuarter = (1-$fractionY) * (1-$fractionY) + $fractionX * $fractionX;

                $floorX = int($pointX);
                $floorY = int($pointY);
        


                if($pointX < 0)
                {
                        $ceilingX = $floorX - 1;        
                }
                else
                {       
                        $ceilingX = $floorX + 1;
                }

                if($pointY < 0)
                {
                        $ceilingY = $floorY - 1;        
                }
                else
                {       
                        $ceilingY = $floorY + 1;
                }

                $minDistance = $firstQuarter;
                $min = "1";
                if ($secondQuarter < $minDistance)
                {
                        $min = "2";
                        $minDistance = $secondQuarter;
                }
                if ($thirdQuarter < $minDistance)
                {
                        $min = "3";
                        $minDistance = $thirdQuarter;
                }
                if ($fourthQuarter < $minDistance)
                {
                        $min = "4";
                }

                if ($min == "1")
                {
                        $newX = $floorX % 20 + 1;
                        $newY = $floorY % 20 + 1;

                        $nodeNameAndTime = "node$newX-$newY";
                        if ($previousNode ne $nodeNameAndTime)
                        {
                                $toFile = "$intervalTime $nodeNameAndTime";
                                print "$toFile\n";;
                                push @{$store{$mobileNumber}}, $toFile;
                                $previousNode = $nodeNameAndTime;
                                $runningTime--;
                                $intervalTime = $intervalTime + $speed;
                        }
                }
                elsif ($min == "2")
                {
                        $newX = $ceilingX % 20 + 1;
                        $newY = $floorY % 20 + 1;

                        $nodeNameAndTime = "node$newX-$newY";
                        if ($previousNode ne $nodeNameAndTime)
                        {
                                $toFile = "$intervalTime $nodeNameAndTime";
                                print "$toFile\n";;
                                push @{$store{$mobileNumber}}, $toFile;
                                $previousNode = $nodeNameAndTime;
                                $runningTime--;
                                $intervalTime = $intervalTime + $speed;
                        }
                }
                elsif ($min == "3")
                {
                        $newX = $ceilingX % 20 + 1;
                        $newY = $ceilingY % 20 + 1;

                        $nodeNameAndTime = "node$newX-$newY";
                        if ($previousNode ne $nodeNameAndTime)
                        {
                                $toFile = "$intervalTime $nodeNameAndTime";
                                print "$toFile\n";;
                                push @{$store{$mobileNumber}}, $toFile;
                                $previousNode = $nodeNameAndTime;
                                $runningTime--;
                                $intervalTime = $intervalTime + $speed;
                        }
                }
                elsif ($min == "4")
                {
                        $newX = $floorX % 20 + 1;
                        $newY = $ceilingY % 20 + 1;

                        $nodeNameAndTime = "node$newX-$newY";
                        if ($previousNode ne $nodeNameAndTime)
                        {
                                $toFile = "$intervalTime $nodeNameAndTime";
                                print "$toFile\n";;
                                push @{$store{$mobileNumber}}, $toFile;
                                $previousNode = $nodeNameAndTime;
                                $runningTime--;
                                $intervalTime = $intervalTime + $speed;
                        }
                }

                if ($runningTime == 0)
                {
                        print "The chosen distance is reached. Ending Simulation...\n";
                        $endMainLoop = 1;
                }
                $noOfHops--;
        }

        if ($endMainLoop == 0)
        {
                $numberOfStopsToPrint = $numberOfStopsMax + 1 - $numberOfStops;
                $mobileNumberIteratorToPrint = $mobileNumberIterator +1;
                print "Destination No : $numberOfStopsToPrint is Reached for Mobile Node Number : $mobileNumberIteratorToPrint\n";      
        }

        $pointX = $newX;
        $pointY = $newY;

        $numberOfStops--;
}

$mobileNumberIterator = 0;
$nodeNumber = $mobileNumberIterator + 1;

while (${$store{$mobileNumberIterator}}[$j] ne ())
{
        $tempWrite = ${$store{$mobileNumberIterator}}[$j];
        system("echo $tempWrite >> VM$nodeNumber.txt");
        $j = $j + 1;
}