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: 
samer@0: public class Ternary extends BaseRandom
samer@0: {
samer@0: 	VDouble	p = new VDouble("p",0.5);
samer@0: 
samer@0: 	public void dispose() { p.dispose(); }
samer@0: 	public double next() { 
samer@0: 		double r=rnd.nextDouble();
samer@0: 		if (r>=p.value) return 0;
samer@0: 		if (r<p.value/2) return -1;
samer@0: 		return 1;
samer@0: 	}
samer@0: }