/// <summary>
        /// Construct a new instance.
        /// </summary>
        /// <param name="metaNeatGenome">NeatGenome metadata.</param>
        /// <param name="genomeBuilder">NeatGenome builder.</param>
        /// <param name="genomeIdSeq">Genome ID sequence; for obtaining new genome IDs.</param>
        /// <param name="innovationIdSeq">Innovation ID sequence; for obtaining new innovation IDs.</param>
        /// <param name="generationSeq">Generation sequence; for obtaining the current generation number.</param>
        /// <param name="addedNodeBuffer">A history buffer of added nodes.</param>
        /// <param name="settings">Asexual reproduction settings.</param>
        /// <param name="weightMutationScheme">Connection weight mutation scheme.</param>
        public NeatReproductionAsexual(
            MetaNeatGenome <T> metaNeatGenome,
            INeatGenomeBuilder <T> genomeBuilder,
            Int32Sequence genomeIdSeq,
            Int32Sequence innovationIdSeq,
            Int32Sequence generationSeq,
            AddedNodeBuffer addedNodeBuffer,
            NeatReproductionAsexualSettings settings,
            WeightMutationScheme <T> weightMutationScheme)
        {
            _settings = settings;

            // Instantiate reproduction strategies.
            _mutateWeightsStrategy    = new MutateWeightsStrategy <T>(metaNeatGenome, genomeBuilder, genomeIdSeq, generationSeq, weightMutationScheme);
            _deleteConnectionStrategy = new DeleteConnectionStrategy <T>(metaNeatGenome, genomeBuilder, genomeIdSeq, generationSeq);

            // Add connection mutation; select acyclic/cyclic strategy as appropriate.
            if (metaNeatGenome.IsAcyclic)
            {
                _addConnectionStrategy = new AddAcyclicConnectionStrategy <T>(
                    metaNeatGenome, genomeBuilder,
                    genomeIdSeq, innovationIdSeq, generationSeq);
            }
            else
            {
                _addConnectionStrategy = new AddCyclicConnectionStrategy <T>(
                    metaNeatGenome, genomeBuilder,
                    genomeIdSeq, innovationIdSeq, generationSeq);
            }

            _addNodeStrategy = new AddNodeStrategy <T>(metaNeatGenome, genomeBuilder, genomeIdSeq, innovationIdSeq, generationSeq, addedNodeBuffer);
        }
Example #2
0
        /// <summary>
        /// Construct a new instance.
        /// </summary>
        /// <param name="eaSettings">NEAT evolution algorithm settings.</param>
        /// <param name="evaluator">An evaluator of lists of genomes.</param>
        /// <param name="speciationStrategy">Speciation strategy.</param>
        /// <param name="population">An initial population of genomes.</param>
        /// <param name="complexityRegulationStrategy">Complexity regulation strategy.</param>
        /// <param name="reproductionAsexualSettings">Asexual reproduction settings.</param>
        /// <param name="reproductionSexualSettings">Sexual reproduction settings.</param>
        /// <param name="weightMutationScheme">Connection weight mutation scheme.</param>
        /// <param name="rng">Random source.</param>
        public NeatEvolutionAlgorithm(
            NeatEvolutionAlgorithmSettings eaSettings,
            IGenomeListEvaluator <NeatGenome <T> > evaluator,
            ISpeciationStrategy <NeatGenome <T>, T> speciationStrategy,
            NeatPopulation <T> population,
            IComplexityRegulationStrategy complexityRegulationStrategy,
            NeatReproductionAsexualSettings reproductionAsexualSettings,
            NeatReproductionSexualSettings reproductionSexualSettings,
            WeightMutationScheme <T> weightMutationScheme,
            IRandomSource rng)
        {
            _eaSettingsCurrent       = eaSettings ?? throw new ArgumentNullException(nameof(eaSettings));
            _eaSettingsComplexifying = eaSettings;
            _eaSettingsSimplifying   = eaSettings.CreateSimplifyingSettings();

            _evaluator          = evaluator ?? throw new ArgumentNullException(nameof(evaluator));
            _speciationStrategy = speciationStrategy ?? throw new ArgumentNullException(nameof(speciationStrategy));
            _pop = population ?? throw new ArgumentNullException(nameof(population));
            _complexityRegulationStrategy = complexityRegulationStrategy ?? throw new ArgumentNullException(nameof(complexityRegulationStrategy));

            if (reproductionAsexualSettings == null)
            {
                throw new ArgumentNullException(nameof(reproductionAsexualSettings));
            }
            if (reproductionSexualSettings == null)
            {
                throw new ArgumentNullException(nameof(reproductionSexualSettings));
            }

            _rng = rng;
            _genomeComparerDescending = new GenomeComparerDescending(evaluator.FitnessComparer);

            if (eaSettings.SpeciesCount > population.PopulationSize)
            {
                throw new ArgumentException("Species count is higher then the population size.");
            }

            _generationSeq = new Int32Sequence();

            _reproductionAsexual = new NeatReproductionAsexual <T>(
                _pop.MetaNeatGenome, _pop.GenomeBuilder,
                _pop.GenomeIdSeq, population.InnovationIdSeq, _generationSeq,
                _pop.AddedNodeBuffer, reproductionAsexualSettings, weightMutationScheme);

            _reproductionSexual = new NeatReproductionSexual <T>(
                _pop.MetaNeatGenome, _pop.GenomeBuilder,
                _pop.GenomeIdSeq, _generationSeq,
                reproductionSexualSettings);

            _offspringBuilder = new OffspringBuilder <T>(
                _reproductionAsexual,
                _reproductionSexual,
                eaSettings.InterspeciesMatingProportion,
                evaluator.FitnessComparer);
        }
Example #3
0
 /// <summary>
 /// Construct a new instance.
 /// </summary>
 /// <param name="genomeBuilder">NeatGenome builder.</param>
 /// <param name="genomeIdSeq">Genome ID sequence; for obtaining new genome IDs.</param>
 /// <param name="generationSeq">Generation sequence; for obtaining the current generation number.</param>
 /// <param name="weightMutationScheme">Connection weight mutation scheme.</param>
 public MutateWeightsStrategy(
     INeatGenomeBuilder <T> genomeBuilder,
     Int32Sequence genomeIdSeq,
     Int32Sequence generationSeq,
     WeightMutationScheme <T> weightMutationScheme)
 {
     _genomeBuilder        = genomeBuilder;
     _genomeIdSeq          = genomeIdSeq;
     _generationSeq        = generationSeq;
     _weightMutationScheme = weightMutationScheme;
 }
 /// <summary>
 /// Construct a new instance.
 /// </summary>
 /// <param name="eaSettings">NEAT evolution algorithm settings.</param>
 /// <param name="evaluator">An evaluator of lists of genomes.</param>
 /// <param name="speciationStrategy">Speciation strategy.</param>
 /// <param name="population">An initial population of genomes.</param>
 /// <param name="reproductionAsexualSettings">Asexual reproduction settings.</param>
 /// <param name="reproductionSexualSettings">Sexual reproduction settings.</param>
 /// <param name="weightMutationScheme">Connection weight mutation scheme.</param>
 public NeatEvolutionAlgorithm(
     NeatEvolutionAlgorithmSettings eaSettings,
     IGenomeListEvaluator <NeatGenome <T> > evaluator,
     ISpeciationStrategy <NeatGenome <T>, T> speciationStrategy,
     NeatPopulation <T> population,
     NeatReproductionAsexualSettings reproductionAsexualSettings,
     NeatReproductionSexualSettings reproductionSexualSettings,
     WeightMutationScheme <T> weightMutationScheme)
     : this(eaSettings, evaluator, speciationStrategy, population,
            reproductionAsexualSettings, reproductionSexualSettings,
            weightMutationScheme,
            RandomDefaults.CreateRandomSource())
 {
 }
Example #5
0
        /// <summary>
        /// Construct a new instance.
        /// </summary>
        /// <param name="metaNeatGenome">NeatGenome metadata.</param>
        /// <param name="genomeBuilder">NeatGenome builder.</param>
        /// <param name="genomeIdSeq">Genome ID sequence; for obtaining new genome IDs.</param>
        /// <param name="innovationIdSeq">Innovation ID sequence; for obtaining new innovation IDs.</param>
        /// <param name="generationSeq">Generation sequence; for obtaining the current generation number.</param>
        /// <param name="addedNodeBuffer">A history buffer of added nodes.</param>
        /// <param name="settings">Asexual reproduction settings.</param>
        /// <param name="weightMutationScheme">Connection weight mutation scheme.</param>
        public NeatReproductionAsexual(
            MetaNeatGenome <T> metaNeatGenome,
            INeatGenomeBuilder <T> genomeBuilder,
            Int32Sequence genomeIdSeq,
            Int32Sequence innovationIdSeq,
            Int32Sequence generationSeq,
            AddedNodeBuffer addedNodeBuffer,
            NeatReproductionAsexualSettings settings,
            WeightMutationScheme <T> weightMutationScheme)
        {
            var settingsComplexifying = settings;
            var settingsSimplifying   = settings.CreateSimplifyingSettings();

            _mutationTypeDistributionsComplexifying = new MutationTypeDistributions(settingsComplexifying);
            _mutationTypeDistributionsSimplifying   = new MutationTypeDistributions(settingsSimplifying);
            _mutationTypeDistributionsCurrent       = _mutationTypeDistributionsComplexifying;

            // Instantiate reproduction strategies.
            _mutateWeightsStrategy    = new MutateWeightsStrategy <T>(genomeBuilder, genomeIdSeq, generationSeq, weightMutationScheme);
            _deleteConnectionStrategy = new DeleteConnectionStrategy <T>(genomeBuilder, genomeIdSeq, generationSeq);

            // Add connection mutation; select acyclic/cyclic strategy as appropriate.
            if (metaNeatGenome.IsAcyclic)
            {
                _addConnectionStrategy = new AddAcyclicConnectionStrategy <T>(
                    metaNeatGenome, genomeBuilder,
                    genomeIdSeq, generationSeq);
            }
            else
            {
                _addConnectionStrategy = new AddCyclicConnectionStrategy <T>(
                    metaNeatGenome, genomeBuilder,
                    genomeIdSeq, generationSeq);
            }

            _addNodeStrategy = new AddNodeStrategy <T>(metaNeatGenome, genomeBuilder, genomeIdSeq, innovationIdSeq, generationSeq, addedNodeBuffer);
        }