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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.tutorial1and2;

import sim.engine.*;
import sim.field.grid.*;

public class CA implements Steppable
    {
    private static final long serialVersionUID = 1;

    // the width and height will change later
    public IntGrid2D tempGrid = new IntGrid2D(0,0);

    public void step(SimState state)
        {
        Tutorial1 tut = (Tutorial1)state;
        // first copy the grid into tempGrid
        tempGrid.setTo(tut.grid);
        
        // now apply the Game of Life!
        
        // for each cell...
        int count;
        int width = tempGrid.getWidth();
        int height = tempGrid.getHeight();
        for(int x=0;x= 5)  // dead
                    tut.grid.field[x][y] = 0;
                else if (count == 3) // life
                    tut.grid.field[x][y] = 1;
                }
        }
    }