/*
Copyright 2006 by Sean Luke and George Mason University
Licensed under the Academic Free License version 3.0
See the file "LICENSE" for more information
*/
package sim.app.wcss.tutorial14;
import sim.engine.*;
import sim.util.*;
import sim.field.continuous.*;
import sim.field.network.*;
public class Students extends SimState
{
private static final long serialVersionUID = 1;
public Continuous2D yard = new Continuous2D(1.0,100,100);
public Continuous3D agitatedYard = new Continuous3D(1.0, 100, 100, 100);
public double TEMPERING_CUT_DOWN = 0.99;
public double TEMPERING_INITIAL_RANDOM_MULTIPLIER = 10.0;
public boolean tempering = true;
public boolean isTempering() { return tempering; }
public void setTempering(boolean val) { tempering = val; }
public int numStudents = 50;
double forceToSchoolMultiplier = 0.01;
double randomMultiplier = 0.1;
public int getNumStudents() { return numStudents; }
public void setNumStudents(int val) { if (val > 0) numStudents = val; }
public double getForceToSchoolMultiplier() { return forceToSchoolMultiplier; }
public void setForceToSchoolMultiplier(double val) { if (forceToSchoolMultiplier >= 0.0) forceToSchoolMultiplier = val; }
public double getRandomMultiplier() { return randomMultiplier; }
public void setRandomMultiplier(double val) { if (randomMultiplier >= 0.0) randomMultiplier = val; }
public Object domRandomMultiplier() { return new sim.util.Interval(0.0, 100.0); }
public double[] getAgitationDistribution()
{
Bag students = buddies.getAllNodes();
double[] distro = new double[students.numObjs];
int len = students.size();
for(int i = 0; i < len; i++)
distro[i] = ((Student)(students.get(i))).getAgitation();
return distro;
}
public Network buddies = new Network(false);
public Students(long seed)
{
super(seed);
}
public void load3DStudents()
{
Bag students = buddies.getAllNodes();
for(int i = 0; i < students.size(); i++)
{
Student student = (Student)(students.get(i));
Double2D loc = (Double2D)(yard.getObjectLocation(student));
// we multiply by 5 in order to scale the agitation roughly with the student dispersion
// in the other two dimensions
agitatedYard.setObjectLocation(student, new Double3D(loc, student.getAgitation() * 5.0));
}
}
public void start()
{
super.start();
// add the tempering agent
if (tempering)
{
randomMultiplier = TEMPERING_INITIAL_RANDOM_MULTIPLIER;
schedule.scheduleRepeating(schedule.EPOCH, 1, new Steppable()
{ public void step(SimState state) { if (tempering) randomMultiplier *= TEMPERING_CUT_DOWN; } });
}
// clear the yard
yard.clear();
// clear the buddies
buddies.clear();
agitatedYard.clear();
// add some students to the yard
for(int i = 0; i < numStudents; i++)
{
Student student = new Student();
yard.setObjectLocation(student,
new Double2D(yard.getWidth() * 0.5 + random.nextDouble() - 0.5,
yard.getHeight() * 0.5 + random.nextDouble() - 0.5));
buddies.addNode(student);
schedule.scheduleRepeating(student);
Steppable steppable = new Steppable()
{
public void step(SimState state) { load3DStudents(); }
};
schedule.scheduleRepeating(schedule.EPOCH, 2, steppable);
}
// define like/dislike relationships
Bag students = buddies.getAllNodes();
for(int i = 0; i < students.size(); i++)
{
Object student = students.get(i);
// who does he like?
Object studentB = null;
do
{
studentB = students.get(random.nextInt(students.numObjs));
} while (student == studentB);
double buddiness = random.nextDouble();
buddies.addEdge(student, studentB, new Double(buddiness));
// who does he dislike?
do
{
studentB = students.get(random.nextInt(students.numObjs));
} while (student == studentB);
buddiness = random.nextDouble();
buddies.addEdge(student, studentB, new Double( -buddiness));
}
load3DStudents();
}
public static void main(String[] args)
{
doLoop(Students.class, args);
System.exit(0);
}
}