00001 // -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*- 00002 00003 //----------------------------------------------------------------------------- 00004 // eoRandomSelect.h 00005 // (c) GeNeura Team, 1998 - EEAAX 1999, Maarten Keijzer 2000 00006 /* 00007 This library is free software; you can redistribute it and/or 00008 modify it under the terms of the GNU Lesser General Public 00009 License as published by the Free Software Foundation; either 00010 version 2 of the License, or (at your option) any later version. 00011 00012 This library is distributed in the hope that it will be useful, 00013 but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 Lesser General Public License for more details. 00016 00017 You should have received a copy of the GNU Lesser General Public 00018 License along with this library; if not, write to the Free Software 00019 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00020 00021 Contact: todos@geneura.ugr.es, http://geneura.ugr.es 00022 Marc.Schoenauer@polytechnique.fr 00023 mak@dhi.dk 00024 */ 00025 //----------------------------------------------------------------------------- 00026 00027 #ifndef eoRandomSelect_h 00028 #define eoRandomSelect_h 00029 00030 //----------------------------------------------------------------------------- 00037 #include <utils/eoRNG.h> 00038 #include <eoSelectOne.h> 00039 00040 //----------------------------------------------------------------------------- 00042 //----------------------------------------------------------------------------- 00043 00044 template <class EOT> class eoRandomSelect: public eoSelectOne<EOT> 00045 { 00046 public: 00047 00049 virtual const EOT& operator()(const eoPop<EOT>& _pop) 00050 { 00051 return _pop[eo::rng.random(_pop.size())] ; 00052 } 00053 }; 00054 00055 //----------------------------------------------------------------------------- 00058 //----------------------------------------------------------------------------- 00059 00060 template <class EOT> class eoBestSelect: public eoSelectOne<EOT> 00061 { 00062 public: 00063 00065 virtual const EOT& operator()(const eoPop<EOT>& _pop) 00066 { 00067 return _pop.best_element() ; 00068 } 00069 }; 00070 00071 //----------------------------------------------------------------------------- 00076 //----------------------------------------------------------------------------- 00077 00078 template <class EOT> class eoNoSelect: public eoSelectOne<EOT> 00079 { 00080 public: 00083 eoNoSelect(): current(0) {} 00084 00085 virtual const EOT& operator()(const eoPop<EOT>& _pop) 00086 { 00087 if (current >= _pop.size()) 00088 current=0; 00089 00090 current++; 00091 return _pop[current-1] ; 00092 } 00093 private: 00094 unsigned current; 00095 }; 00096 00097 #endif 00098