Migration from SVN

peo/tutorial/Lesson3/QAPGA.h

@@ -0,0 +1,128 @@
+/*
+  <QAPGA.h>
+  Copyright (C) DOLPHIN Project-Team, INRIA Lille Nord Europe, 2006-2009
+  (C) OPAC Team, LIFL, 2002-2009
+
+  The Van LUONG,  (The-Van.Luong@inria.fr)
+  Mahmoud FATENE
+
+  This software is governed by the CeCILL license under French law and
+  abiding by the rules of distribution of free software.  You can  use,
+  modify and/ or redistribute the software under the terms of the CeCILL
+  license as circulated by CEA, CNRS and INRIA at the following URL
+  "http://www.cecill.info".
+
+  As a counterpart to the access to the source code and  rights to copy,
+  modify and redistribute granted by the license, users are provided only
+  with a limited warranty  and the software's author,  the holder of the
+  economic rights,  and the successive licensors  have only  limited liability.
+
+  In this respect, the user's attention is drawn to the risks associated
+  with loading,  using,  modifying and/or developing or reproducing the
+  software by the user in light of its specific status of free software,
+  that may mean  that it is complicated to manipulate,  and  that  also
+  therefore means  that it is reserved for developers  and  experienced
+  professionals having in-depth computer knowledge. Users are therefore
+  encouraged to load and test the software's suitability as regards their
+  requirements in conditions enabling the security of their systems and/or
+  data to be ensured and,  more generally, to use and operate it in the
+  same conditions as regards security.
+  The fact that you are presently reading this means that you have had
+  knowledge of the CeCILL license and that you accept its terms.
+
+  ParadisEO WebSite : http://paradiseo.gforge.inria.fr
+  Contact: paradiseo-help@lists.gforge.inria.fr
+*/
+
+#ifndef _QAPGA_h
+#define _QAPGA_h
+
+class ProblemInit : public eoInit<Problem>
+{
+public:
+
+  void operator()(Problem & _problem)
+  {
+    _problem.create();
+  }
+};
+
+class ProblemEvalFunc : public eoEvalFunc<Problem>
+{
+public:
+
+  void operator()(Problem & _problem)
+  {
+    _problem.fitness(_problem.evaluate());
+      
+  }
+};
+
+class ProblemXover : public eoQuadOp<Problem> {
+public:
+
+  /* The two parameters in input are the parents.
+     The first parameter is also the output ie the child 
+  */
+  bool operator()(Problem & _problem1, Problem & _problem2)
+  {
+    int i;
+    int random, temp;
+    int unassigned_positions[n];
+    int remaining_items[n];
+    int j = 0;
+				
+    /* 1) find the items assigned in different positions for the 2 parents */
+    for (i = 0 ; i < n ; i++){
+      if (_problem1.solution[i] != _problem2.solution[i]){
+	unassigned_positions[j] = i;
+	remaining_items[j] = _problem1.solution[i];
+	j++;
+      }
+    }
+    
+    /* 2) shuffle the remaining items to ensure that remaining items 
+       will be assigned at random positions */
+    for (i = 0; i < j; i++){
+      random = rng.rand()%(j-i) + i;
+      temp = remaining_items[i];
+      remaining_items[i] = remaining_items[random];
+      remaining_items[random] = temp;
+    }
+						    					   
+    /* 3) copy the shuffled remaining items at unassigned positions */
+    for (i = 0; i < j ; i++)
+      _problem1.solution[unassigned_positions[i]] = remaining_items[i];
+
+    // crossover in our case is always possible
+    return true; 
+  }
+};
+
+class ProblemSwapMutation: public eoMonOp<Problem> {
+public:
+ 
+  bool operator()(Problem& _problem)  {
+    int i,j;
+    int temp;
+
+    // generate two different indices
+    i=rng.rand()%n;
+    do 
+      j = rng.rand()%n; 
+    while (i == j);  
+		   
+    // swap
+    temp = _problem.solution[i];
+    _problem.solution[i] = _problem.solution[j];
+    _problem.solution[j] = temp;
+
+    return true;
+    
+  }
+};
+
+
+
+
+#endif