cspecies.h

一个关于人工智能的实例源码,非常有价值.希望能对大家有用

#ifndef CSPECIES_H
#define CSPECIES_H
//-----------------------------------------------------------------------
//
//  Name: CSpecies.h
//
//  Author: Mat Buckland 2002
//
//	Desc: speciazation class used in the implementation of Kenneth Owen
//        Stanley's and Risto Miikkulainen's NEAT idea.
//
//-----------------------------------------------------------------------
#include <vector>
#include <math.h>
#include <iomanip>
#include <iostream>

#include "genotype.h"

using namespace std;


//------------------------------------------------------------------------
//
//  class to hold all the genomes of a given species
//------------------------------------------------------------------------
class CSpecies
{

private:

  //keep a local copy of the first member of this species
  CGenome           m_Leader;
  
  //pointers to all the genomes within this species
  vector<CGenome*>  m_vecMembers;
  
  //the species needs an identification number
  int               m_iSpeciesID;
	
  //best fitness found so far by this species
  double            m_dBestFitness;
  
  //generations since fitness has improved, we can use 
  //this info to kill off a species if required
  int               m_iGensNoImprovement;

  //age of species
  int               m_iAge;
  
  //how many of this species should be spawned for
  //the next population
  double            m_dSpawnsRqd;


public:
	
  CSpecies(CGenome &FirstOrg, int SpeciesID);

  //this method boosts the fitnesses of the young, penalizes the
  //fitnesses of the old and then performs fitness sharing over
  //all the members of the species
  void    AdjustFitnesses();
  
  //adds a new individual to the species
  void    AddMember(CGenome& new_org);

  void    Purge();

  //calculates how many offspring this species should 
  void    CalculateSpawnAmount();

  //spawns an individual from the species selected at random
  //from the best CParams::dSurvivalRate percent
  CGenome Spawn();


  //--------------------------------------accessor methods 
  CGenome  Leader()const{return m_Leader;}
 
  double   NumToSpawn()const{return m_dSpawnsRqd;}

  int      NumMembers()const{return m_vecMembers.size();}
  
  int      GensNoImprovement()const{return m_iGensNoImprovement;}

  int      ID()const{return m_iSpeciesID;}

  double   SpeciesLeaderFitness()const{return m_Leader.Fitness();}
  
  double   BestFitness()const{return m_dBestFitness;}

  int      Age()const{return m_iAge;}

  
  //so we can sort species by best fitness. Largest first
  friend bool operator<(const CSpecies &lhs, const CSpecies &rhs)
  {
    return lhs.m_dBestFitness > rhs.m_dBestFitness;
  }

};

#endif