Rosenbrock3D.java

/*
  Copyright 2006 by Ankur Desai, 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.pso3d;

/**
   @author Ankur Desai and Joey Harrison
*/
public class Rosenbrock3D implements Evaluatable3D
    {
    private static final long serialVersionUID = 1;

    public double calcFitness(double x, double y, double z) 
        {
        return (1000 - (100 *                           
                ((x*x - y)*(x*x - y) + (1-x)*(1-x)) +
                ((y*y - z)*(y*y - z) + (1-y)*(1-y))
                )); 
        }
    }