/*  This file is part of the source code for 3D-XplorMath-J, Version 1.0 (January 2008).
 *  Copyright (c) 2008 The 3D-XplorMath Consortium (http://3d-xplormath.org).
 *  This source code is released under a BSD License, which allows redistribution   
 *  in source and binary form, with or without modification, provided copyright
 *  and license information are included, and with no warranty or guarantee of
 *  any kind.  For details, see http://3d-xplormath.org/j/source/BSDLicense.txt
 */
 
 package vmm3d.ode.firstorder1D;

import vmm3d.core.RealParamAnimateable;


public class Logistic extends ODE1stOrder1D{
	
	private RealParamAnimateable a;
	private RealParamAnimateable b;
	
	public Logistic() { 
		dtDefault = 0.1;
		timeSpanDefault = 25;
		initialDataDefault = new double[] { -7, .05};
		setDefaultWindow(-8,8,-8,8);
		a = new RealParamAnimateable("vmm.ode.firstorder2D.Logistic.a", 1, 0.5, 1.0);
		b = new RealParamAnimateable("vmm.ode.firstorder2D.Logistic.b", 5, 1, 5);
		addParameter(a);
		addParameter(b);
	}

	protected double x1Prime(double x1, double x2) {
		return  1;
	}

	protected double x2Prime(double x1, double x2) {
		return a.getValue()*x2*(1-x2/b.getValue());
	}
	
}