00001 // -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*- 00002 00003 //----------------------------------------------------------------------------- 00004 // eoSigBinaryFlight.h 00005 // (c) OPAC 2007, INRIA Futurs DOLPHIN 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: thomas.legrand@lifl.fr 00022 clive.canape@inria.fr 00023 */ 00024 //----------------------------------------------------------------------------- 00025 00026 #ifndef EOSIGBINARYFLIGHT_H 00027 #define EOSIGBINARYFLIGHT_H 00028 00029 //----------------------------------------------------------------------------- 00030 #include <eoBinaryFlight.h> 00031 //----------------------------------------------------------------------------- 00032 00033 00034 00043 template < class POT > class eoSigBinaryFlight:public eoBinaryFlight < POT > 00044 { 00045 00046 public: 00047 00051 eoSigBinaryFlight (){slope = 1;} 00052 eoSigBinaryFlight (unsigned _slope){slope = _slope;} 00053 00054 00058 double sigmoid( double _value) 00059 { 00060 return(1/(1+ exp(- _value/slope))); 00061 00062 } 00063 00068 void operator () (POT & _po) 00069 { 00070 00071 for (unsigned j = 0; j < _po.size (); j++) 00072 { 00073 double sigma=rng.uniform(1); 00074 00075 if (sigma < sigmoid(_po.velocities[j])) 00076 _po[j]=1; 00077 else 00078 _po[j]=0; 00079 } 00080 00081 // invalidate the fitness because the positions have changed 00082 _po.invalidate(); 00083 } 00084 00085 private : 00086 unsigned slope; 00087 00088 }; 00089 00090 00091 00092 #endif /*EOSIGBINARYFLIGHT_H */