/// <summary>
/// Override that randomly assigns activation functions to neuron's from an activation function library
/// based on each library item's selection probability.
/// </summary>
public override NeuronGene CreateNeuronGene(uint innovationId, NodeType neuronType)
{
switch (neuronType)
{
case NodeType.Bias:
case NodeType.Input:
{ // Use the ID of the first function. By convention this will be the a sigmoid function in nEAT and RBF-NEAT
// but in actual fact bias and input neurons don't use their activation function.
int activationFnId = _activationFnLibrary.GetFunctionList()[0].Id;
return(new NeuronGene(innovationId, neuronType, activationFnId));
}
default:
{
ActivationFunctionInfo fnInfo = _activationFnLibrary.GetRandomFunction(_rng);
IActivationFunction actFn = fnInfo.ActivationFunction;
double[] auxArgs = null;
if (actFn.AcceptsAuxArgs)
{
auxArgs = actFn.GetRandomAuxArgs(_rng, _neatGenomeParamsCurrent.ConnectionWeightRange);
}
return(new NeuronGene(innovationId, neuronType, fnInfo.Id, auxArgs));
}
}
}