samer@0: /*
samer@0:  *	Copyright (c) 2000, Samer Abdallah, King's College London.
samer@0:  *	All rights reserved.
samer@0:  *
samer@0:  *	This software is provided AS iS and WITHOUT ANY WARRANTY; 
samer@0:  *	without even the implied warranty of MERCHANTABILITY or 
samer@0:  *	FITNESS FOR A PARTICULAR PURPOSE.
samer@0:  */
samer@0: 
samer@0: package samer.maths.random;
samer@0: import  samer.core.types.*;
samer@0: import  java.util.*;
samer@0: 
samer@0: public class BoundedUniform extends BaseRandom implements Observer
samer@0: {
samer@0: 	VDouble min = new VDouble("min",0);
samer@0: 	VDouble max = new VDouble("max",1);
samer@0: 	double  a, b;
samer@0: 
samer@0: 	public String toString() { return "Uniform["+min.value+","+max.value+")"; }
samer@0: 	
samer@0: 	public void dispose() { min.dispose(); max.dispose(); }
samer@0: 	public double next() { return a + b*rnd.nextDouble(); }
samer@0: 	public void   next(double [] x) { 
samer@0: 		for (int i=0; i<x.length; i++) x[i]=a + b*rnd.nextDouble(); 
samer@0: 	}
samer@0: 
samer@0: 	public BoundedUniform( double min, double max) 
samer@0: 	{
samer@0: 		this();
samer@0: 		this.min.value = min; this.min.changed();
samer@0: 		this.max.value = max; this.max.changed();
samer@0: 	}
samer@0: 
samer@0: 	public BoundedUniform() 
samer@0: 	{
samer@0: 		min.addObserver(this);
samer@0: 		max.addObserver(this);
samer@0: 		update(null,null);
samer@0: 	}
samer@0: 
samer@0: 	public void update(Observable o, Object oo) {
samer@0: 		a=min.value; b=max.value-min.value;
samer@0: 	}
samer@0: }