EvolvingObjects
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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 #ifndef eoRandomSelect_h 00027 #define eoRandomSelect_h 00028 00035 #include <utils/eoRNG.h> 00036 #include <eoSelectOne.h> 00037 00042 template <class EOT> class eoRandomSelect: public eoSelectOne<EOT> 00043 { 00044 public: 00045 00047 virtual const EOT& operator()(const eoPop<EOT>& _pop) 00048 { 00049 return _pop[eo::rng.random(_pop.size())] ; 00050 } 00051 }; 00052 00058 template <class EOT> class eoBestSelect: public eoSelectOne<EOT> 00059 { 00060 public: 00061 00063 virtual const EOT& operator()(const eoPop<EOT>& _pop) 00064 { 00065 return _pop.best_element() ; 00066 } 00067 }; 00068 00074 template <class EOT> class eoNoSelect: public eoSelectOne<EOT> 00075 { 00076 public: 00079 eoNoSelect(): current(0) {} 00080 00081 virtual const EOT& operator()(const eoPop<EOT>& _pop) 00082 { 00083 if (current >= _pop.size()) 00084 current=0; 00085 00086 current++; 00087 return _pop[current-1] ; 00088 } 00089 private: 00090 unsigned current; 00091 }; 00092 00093 #endif