/*
* Encog(tm) Core v3.4 - Java Version
* http://www.heatonresearch.com/encog/
* https://github.com/encog/encog-java-core
* Copyright 2008-2016 Heaton Research, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* For more information on Heaton Research copyrights, licenses
* and trademarks visit:
* http://www.heatonresearch.com/copyright
*/
package org.encog.neural.neat.training.opp.links;
import java.util.Random;
import org.encog.ml.ea.train.EvolutionaryAlgorithm;
import org.encog.neural.neat.training.NEATLinkGene;
/**
* This interface defines various ways that a NEAT network can have its link
* weights mutated.
*
* -----------------------------------------------------------------------------
* http://www.cs.ucf.edu/~kstanley/ Encog's NEAT implementation was drawn from
* the following three Journal Articles. For more complete BibTeX sources, see
* NEATNetwork.java.
*
* Evolving Neural Networks Through Augmenting Topologies
*
* Generating Large-Scale Neural Networks Through Discovering Geometric
* Regularities
*
* Automatic feature selection in neuroevolution
*/
public interface MutateLinkWeight {
/**
* @return The training class that this mutator is being used with.
*/
EvolutionaryAlgorithm getTrainer();
/**
* Setup the link mutator.
*
* @param theTrainer
* The training class that this mutator is used with.
*/
void init(EvolutionaryAlgorithm theTrainer);
/**
* Perform the weight mutation on the specified link.
*
* @param rnd
* A random number generator.
* @param linkGene
* The link to mutate.
* @param weightRange
* The weight range, weights are between -weightRange and
* +weightRange.
*/
void mutateWeight(Random rnd, NEATLinkGene linkGene, double weightRange);
}