view src/samer/maths/opt/AbsXFConvergence.java @ 0:bf79fb79ee13

Initial Mercurial check in.

/*
 *	Copyright (c) 2000, Samer Abdallah, King's College London.
 *	All rights reserved.
 *
 *	This software is provided AS iS and WITHOUT ANY WARRANTY; 
 *	without even the implied warranty of MERCHANTABILITY or 
 *	FITNESS FOR A PARTICULAR PURPOSE.
 */

package samer.maths.opt;
import  samer.maths.*;


public class AbsXFConvergence
{
	double	XTOL=1e-7;	// various tolerances
	double  FTOL=XTOL*XTOL;
	
	public void setXTolerance( double tolx) { XTOL=tolx; }
	public void setFTolerance( double tolf) { FTOL=tolf; }
	
	public boolean isSatisfied(State S) 
	{
		// small step taken
		// this compares the actual step taken with
		if (Math.abs(S.P1.f-S.P2.f)>FTOL) return false;
		if (S.alpha*S.normh>XTOL) return false;
		return true;
	}
}