/// <summary>
/// Find an innovation for a hidden neuron that split a existing link. This
/// is the means by which hidden neurons are introduced in NEAT.
/// </summary>
/// <param name="fromId">The source neuron ID in the link.</param>
/// <param name="toId">The target neuron ID in the link.</param>
/// <returns>The newly created innovation, or the one that matched the search.</returns>
public NEATInnovation FindInnovationSplit(long fromId, long toId)
{
String key = ProduceKeyNeuronSplit(fromId, toId);
lock (_list)
{
if (_list.ContainsKey(key))
{
return(_list[key]);
}
long neuronId = Population.AssignGeneId();
var innovation = new NEATInnovation
{
InnovationId = Population.AssignInnovationId(),
NeuronId = neuronId
};
_list[key] = innovation;
// create other sides of split, if needed
FindInnovation(fromId, neuronId);
FindInnovation(neuronId, toId);
return(innovation);
}
}
