SimpleGrowableGenome.h

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/*
Teem - an open source evolutionary software framework
http://lis.epfl.ch/resources/Teem
Stephane Magnenat <stephane.magnenat@epfl.ch>,
Antoine Beyeler <antoine.beyeler@epfl.ch>,
and other contributors. See AUTHORS for details
Laboratory of Intelligent Systems, EPFL, Lausanne

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

#ifndef __SIMPLE_GROWABLE_GENOME_H
#define __SIMPLE_GROWABLE_GENOME_H

#include "Genome.h"
#include <list>

namespace Teem
{
    class SimpleGrowableGenome: public Genome
    {
    public:
        struct Link
        {
            unsigned in; 
            unsigned out; 
            double weight; 
            
            Link(unsigned in, unsigned out, double weight);
            Link(Ishtar::InputStream *stream);
            void save(Ishtar::OutputStream *stream);
        };
    
    protected:
        friend class NeatNeuralNetwork;
        //static unsigned innovationCount;
        std::list<Link> links; 
        unsigned minimumToPreserve; 
        
    protected:
        // Support function
        unsigned countNodes(void); 
        void defragNodes(void);
        
        // Mutation operator
        void mutateAddLink(unsigned nodeCount);
        void mutateDelLink(void);
        void mutateChangeLink(void);
        
        void mutateAddNode(unsigned nodeCount);
        void mutateDelNode(unsigned nodeCount);
        
        void mutateDuplicateGenome(void);
        
        // Ishtar parameters
        Ishtar::Variable<double> mutationAddLinkConstProbability; 
        Ishtar::Variable<double> mutationAddLinkPropProbability; 
        Ishtar::Variable<double> mutationDelLinkProbability; 
        Ishtar::Variable<double> mutationChangeLinkProbability; 
        
        Ishtar::Variable<double> mutationAddNodeProbability; 
        Ishtar::Variable<double> mutationDelNodeProbability; 
        
        Ishtar::Variable<double> mutationDuplicateGenomeProbability; 
    
    public:
        SimpleGrowableGenome(Ishtar::InputStream *stream);
        SimpleGrowableGenome(unsigned minToPreserve);
        
        virtual ~SimpleGrowableGenome() { }
        virtual void randomize(void);
        virtual void mutate(void);
        virtual void cross(const Genome *other);
        virtual Genome *clone(void);
        
        virtual void save(Ishtar::OutputStream *stream);
    };
}

#endif

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