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Extent.java

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/* -*- indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Marco Kuhlmann <kuhlmann@ps.uni-sb.de>
 *     Guido Tack <tack@gecode.org>
 *
 *  Copyright:
 *     Marco Kuhlmann, 2005
 *     Guido Tack, 2006
 *
 *  Last modified:
 *     $Date: 2006-10-26 11:31:58 +0200 (Thu, 26 Oct 2006) $ by $Author: tack $
 *     $Revision: 3796 $
 *
 *  This file is part of Gecode, the generic constraint
 *  development environment:
 *     http://www.gecode.org
 *
 *  See the file "LICENSE" for information on usage and
 *  redistribution of this file, and for a
 *     DISCLAIMER OF ALL WARRANTIES.
 *
 */

package org.gecode.gist;

public class Extent {

        public int extentL;
        public int extentR;
        
        public Extent(int pExtentL, int pExtentR) {
                extentL = pExtentL;
                extentR = pExtentR;
        }
        
        public Extent(int width) {
    int halfWidth = width / 2;
                extentL = 0 - halfWidth;
                extentR = 0 + halfWidth;
        }
  
  public void extend(int deltaL, int deltaR) {
    extentL += deltaL;
    extentR += deltaR;
  }
  
  public void move(int delta) {
    extentL += delta;
    extentR += delta;
  }
  
  public String toString() {
    return "(" + extentL + "," + extentR + ")";
  }
  
}