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);
}
private void linkMutate(Genome genome, boolean forceBias) {
int neuron1Index = randomNeuronIndex(genome.genes, false);
int neuron2Index = randomNeuronIndex(genome.genes, true);
Gene newLink = new Gene();
// if the index of the neuron is less than num inputs then it must be an input-neuron.. i should
// change this architecture
if (neuron1Index <= getGameDataManager().getNumInputs()
&& neuron2Index <= getGameDataManager().getNumInputs()) {
// --Both input nodes
return;
}
if (neuron2Index <= getGameDataManager().getNumInputs()) {
// -- Swap output and input -- probably should copy !
int temp = neuron1Index;
neuron1Index = neuron2Index;
neuron2Index = temp;
}
newLink.setInto(neuron1Index);
newLink.setOut(neuron2Index);
if (forceBias) {
newLink.setInto(getGameDataManager().getNumInputs());
}
if (containsLink(genome.genes, newLink)) {
return;
}
newLink.innovation = newInnovation();
newLink.setWeight(rand.nextFloat() * 4 - 2);
genome.genes.add(newLink);
}
