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Here is the code for controller and model.
package sim.algs.alg2;
/*
This is the primary simulation with reproduction of each agent by a single child.
age is to determine death and survival.
Need to introduce Death, survival probability and colour change due to age.
/*
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
*/
import ec.util.MersenneTwisterFast;
//import sim.alg1.Agent;
import sim.engine.Schedule;
import sim.engine.Sequence;
import sim.engine.SimState;
import sim.engine.Steppable;
import sim.field.grid.ObjectGrid2D;
import sim.util.Bag;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Comparator;
public class SimEnviro2 extends SimState {
private static final long serialVersionUID = 1L;
private ObjectGrid2D mySpace;
public static final int gridWidth = 5;
public static final int gridHeight = 6;
private Bag agents;
private int initNumberOfAgents = 1;
public SimEnviro2(long seed) {
super(new MersenneTwisterFast(seed), new Schedule());
}
public void start() {
super.start();
buildModel();
buildSchedule();
}
public void buildModel() {
mySpace = new ObjectGrid2D(gridWidth, gridHeight);
agents = new Bag();
for (int i=0; i<initNumberOfAgents; i++) {
agents.add(new Agent2(this));
}
}
public void buildSchedule() {
// build a sequence that makes all the agents
// replicate
Sequence agentReplicateSeq = new Sequence(agents) {
public void step(SimState state) {
super.step(state);
for (int i=0; i<steps.length; i++)
((Agent2)steps[i]).replicate(state);
}
};
schedule.scheduleRepeating(0,0,agentReplicateSeq);
// build a sequence that makes all the agents
// steps is the instance variable in a Sequence
// that stores the Steppable objects
}
public int getgridWidth() {
return gridWidth;
}
public int getgridHeight() {
return gridHeight;
}
public ObjectGrid2D getMySpace() {
return mySpace;
}
public int getInitNumberOfAgents(){
return initNumberOfAgents;
}
public void setInitNumberOfAgents(int initNumberOfAgents) {
this.initNumberOfAgents = initNumberOfAgents;
}
public Bag getAgents() {
return agents;
}
}
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package sim.algs.alg2;
import sim.engine.SimState;
import sim.engine.Steppable;
import sim.field.grid.Grid2D;
import sim.field.grid.ObjectGrid2D;
import sim.util.Bag;
import sim.util.IntBag;
import ec.util.*;
/**
* Created by Your PC on 14/05/2015.
* Revised 15/03/2018
*/
public class Agent2 implements Steppable {
private static final long serialVersionUID = 1L;
public MersenneTwisterFast random;
private static final int Width = SimEnviro2.gridWidth;
private static final int Height = SimEnviro2.gridHeight;
private int myX, myY, nextX, nextY;
private double age;
private int counter = 1;
// This constructor for offspring
public Agent2(){
age = 0.0;
}
public Agent2(SimEnviro2 theModel) {
placeFirstAgent(theModel);
age = 1.0;
}
public void placeFirstAgent(SimEnviro2 theModel) {
ObjectGrid2D mySpace = theModel.getMySpace();
// 2 options either direct placement.
do {
myX = 0;
myY = 0;
}
// or randomly place agent into grid
/* do {
myX = theModel.random.nextInt(Width);
myY = theModel.random.nextInt(Height);
}
*/
while (mySpace.field[myX][myY] != null);
mySpace.field[myX][myY] = this;
}
public void finish() {
}
public void step(SimState state) {
// this would make an agent move and grow, then the
// next agent move and replicate... not what we want
/* move();
replicate(); */
}
// Don't need this method as there is not a requirement
// of random movement except for the first placement.
// each subsequent placement is from the von Neumann neighbours
// found by the built-in method.
public void replicate(SimState state) {
SimEnviro2 theModel = (SimEnviro2) state;
Bag theAgents = theModel.getAgents();
ObjectGrid2D mySpace = theModel.getMySpace();
// int newX, newY;
int hop = 8;
Bag result = new Bag();
IntBag xNeighbors = new IntBag();
IntBag yNeighbors = new IntBag();
// mySpace.getVonNeumannNeighbors(myX, myY, hop, Grid2D.BOUNDED, false, null, xNeighbors, yNeighbors);
mySpace.getVonNeumannNeighbors(myX, myY, hop, Grid2D.BOUNDED, false, result, xNeighbors, yNeighbors);
int len = xNeighbors.size();
int loc = result.size();
/*
int j;
for ( j = 0; j < len-3; j++) {
System.out.println(" Bag size " + len);}
/* System.out.print(" x = " + xNeighbors.get(j));
System.out.println(" : y = " + yNeighbors.get(j));
*//*
System.out.print(" myX = " + myX);
System.out.println(" : myY = " + myY);
*/
for (int i=0; i<len; i++) {
Agent2 child = new Agent2();
int total = ( Width * Height );
if (len == loc) {
state.finish();
}
nextX = mySpace.tx(xNeighbors.get(i));
nextY = mySpace.tx(yNeighbors.get(i));
if (mySpace.field[nextX][nextY]== null) {
// System.out.print(" nextX = " + nextX);
// System.out.println(" : NextY = " + nextY);
System.out.println(" : counter = " + counter);
mySpace.field[nextX][nextY] = child;
child.myX = nextX;
child.myY = nextY;
theAgents.add(child);
// System.out.println("Final :" + ((total - counter) - 1));
counter++;
break;
}
}
myX = nextX; myY = nextY;
if ( counter == ( Width * Height )) {
state.finish();
}
}
}
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