package org.openscience.cdk.modeling.forcefield;import javax.vecmath.GVector;//import org.openscience.cdk.tools.LoggingTool;/** * Find a direction from a point of the coordinates space using the steepest descents approach. * * @author      vlabarta * @cdk.module  forcefield * * @cdk.keyword steepest descent */public class SteepestDescentsMethod {	GVector sk = null;	//private LoggingTool logger;	public SteepestDescentsMethod() {        		//logger = new LoggingTool(this);	}	/**	 *  Constructor for the SteepestDescentsMethod object	 *	 *@param  coords3d  Coordinates from current point	 */	public SteepestDescentsMethod(GVector coords3d) {		sk = new GVector(coords3d.getSize());	}	/**	 *  sk=-gK/|gk|	 *	 * @param  gk  Gradient at coordinates Xk	 */	public void setSk(GVector gk) {		sk.set(gk);		sk.normalize();		sk.scale(-1);		//logger.debug("vectorS = " + sk);		return;	}}