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MASON is a fast discrete-event multiagent simulation library core in Java, designed to be the foundation for large custom-purpose Java simulations, and also to provide more than enough functionality for many lightweight simulation needs. MASON contains both a model library and an optional suite of visualization tools in 2D and 3D.

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/*
  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.tutorial5;
import sim.engine.*;
import sim.field.continuous.*;
import sim.field.network.*;
import sim.util.*;

public class Tutorial5 extends SimState
    {
    private static final long serialVersionUID = 1;

    public Continuous2D balls;
    public Network bands;

    public int numBalls = 50;
    public int numBands = 60;
    
    public final static double maxMass = 10.0;
    public final static double minMass = 1.0;
    public final static double minLaxBandDistance = 10.0;
    public final static double maxLaxBandDistance = 50.0;
    public final static double minBandStrength = 5.0;
    public final static double maxBandStrength = 10.0;
    public final static double collisionDistance = 5.0;
    
    public int getNumBalls() { return numBalls; }
    public void setNumBalls(int val) { if (val >= 2 ) numBalls = val; }
    public int getNumBands() { return numBands; }
    public void setNumBands(int val) { if (val >= 0 ) numBands = val; }

    public Tutorial5(long seed)
        {
        super(seed);
        balls = new Continuous2D(collisionDistance,100,100);
        bands = new Network();
        }

    public void start()
        {
        super.start();

        balls = new Continuous2D(collisionDistance,100,100);
        bands = new Network(false);
        
        Steppable[] s = new Steppable[numBalls];
        
        // make the balls
        for(int i=0; i