public void enableDisableMutate(Genome genome, boolean enable) {
List<Gene> candidates = new ArrayList<Gene>();
// find the genes that are not this enablestate
for (Gene gene : genome.genes) {
if (gene.isEnabled() != enable) {
candidates.add(gene);
}
}
if (candidates.isEmpty()) {
return;
}
// flip the enablestate of a random candidate
int randomIndex = rand.nextInt(candidates.size());
Gene gene = candidates.get(randomIndex);
gene.setEnabled(!gene.isEnabled());
}
private Genome crossover(Genome g1, Genome g2) // splice two genomes together
{
// -- Make sure g1 is the higher fitness genome
if (g2.fitness > g1.fitness) {
Genome tempg = g1;
g1 = g2;
g2 = tempg;
}
Genome child = new Genome();
HashMap<Integer, Gene> innovations2 = new HashMap<Integer, Gene>();
for (int i = 0; i < g2.getGenes().size(); i++) {
Gene gene = g2.getGenes().get(i);
innovations2.put(gene.getInnovation(), gene);
}
for (int i = 0; i < g1.getGenes().size(); i++) {
Gene gene1 = g1.getGenes().get(i);
Gene gene2 = innovations2.get(gene1.getInnovation());
if (gene2 != null && rand.nextBoolean() && gene2.isEnabled()) {
child.getGenes().add(gene2.copy());
} else {
child.getGenes().add(gene1.copy());
}
}
// set to the max
if (g1.maxneuron > g2.maxneuron) {
child.maxneuron = g1.maxneuron;
} else {
child.maxneuron = g2.maxneuron;
}
for (String key : g1.mutationRates.keySet()) // give the child the mutations of g1
{
child.mutationRates.put(key, g1.mutationRates.get(key));
}
return child;
}
private void nodeMutate(Genome genome) {
if (genome.genes.size() == 0) return;
genome.maxneuron = genome.maxneuron + 1;
int randomIndex = rand.nextInt(genome.genes.size());
Gene gene = genome.genes.get(randomIndex);
if (!gene.isEnabled()) return;
gene.setEnabled(false);
Gene gene1 = gene.copy();
gene1.setOut(genome.maxneuron);
gene1.setWeight(1.0f);
gene1.innovation = newInnovation();
gene1.setEnabled(true);
genome.genes.add(gene1);
Gene gene2 = gene.copy();
gene2.setInto(genome.maxneuron);
gene2.innovation = newInnovation();
gene2.setEnabled(true);
genome.genes.add(gene2);
}