/// <summary>
/// Copy weights from another connection struct.
/// </summary>
/// <param name="nnc">Source to copy from.</param>
public void CopyWeights(NeuralNetworkLayerConnection nnc)
{
float[] cb = nnc.weights;
int i = numberOfSynapses;
while (i-- > 0)
{
weights[i] = cb[i];
}
}
//breed with another layer connection data class(partner), partner must have the same # of synapses
//takes a random selection of weights and biases from partner and replaces the a %(partPartner) of this classes weights/classes with those
//partPartner is the % of weights and biases to use from the partner, 0 being none and 1 being all the weights/biases
/// <summary>
/// Breed with another connection(partner) taking a %(partPartner) of randomly selected weights.
/// </summary>
/// <param name="partner">Partner layer.</param>
/// <param name="partPartner">Percent(0-1) of weights to take from partner.</param>
public void Breed(NeuralNetworkLayerConnection partner)
{
int i = numberOfSynapses;
while (i-- > 0)
{
//randomly mix
float val = Utils.NextFloat01();
weights[i] = weights[i] * val + partner.weights[i] * (1.0f - val);
}
}
/// <summary>
/// Create new NeuralNetwork from existing(src).
/// </summary>
/// <param name="src">Existing NeuralNetwork to copy.</param>
public NeuralNetwork(NeuralNetwork src)
{
inputLayer = new NeuralNetworkLayer(src.inputLayer);
hiddenLayers = new NeuralNetworkLayer[src.hiddenLayers.Length];
for (int i = 0; i < hiddenLayers.Length; i++)
{
hiddenLayers[i] = new NeuralNetworkLayer(src.hiddenLayers[i]);
hiddenLayers[i].Init();
}
outputLayer = new NeuralNetworkLayer(src.outputLayer);
outputLayer.Init();
//setup layer connections
if (hiddenLayers.Length > 0)
{
//hidden layer connections
hiddenConnections = new NeuralNetworkLayerConnection[hiddenLayers.Length];
hiddenRecurringConnections = new NeuralNetworkLayerConnection[hiddenLayers.Length];
maxNumberOfHiddenNeurons = 0;
maxNumberOfSynapses = 0;
for (int i = 0; i < hiddenLayers.Length; i++)
{
if (i == 0)
{
hiddenConnections[0] = new NeuralNetworkLayerConnection(inputLayer, hiddenLayers[0]);
}
else
{
hiddenConnections[i] = new NeuralNetworkLayerConnection(hiddenLayers[i - 1], hiddenLayers[i]);
}
//recurrent connection for hidden layer
if (hiddenLayers[i].recurring)
{
hiddenRecurringConnections[i] = new NeuralNetworkLayerConnection(hiddenLayers[i], hiddenLayers[i]);
}
else
{
hiddenRecurringConnections[i] = null;
}
//calc max hidden neurons
if (hiddenLayers[i].numberOfNeurons > maxNumberOfHiddenNeurons)
{
maxNumberOfHiddenNeurons = hiddenLayers[i].numberOfNeurons;
}
if (hiddenConnections[i].numberOfSynapses > maxNumberOfSynapses)
{
maxNumberOfSynapses = hiddenConnections[i].numberOfSynapses;
}
}
//output connection
outputConnection = new NeuralNetworkLayerConnection(hiddenLayers[hiddenLayers.Length - 1], outputLayer);
if (outputConnection.numberOfSynapses > maxNumberOfSynapses)
{
maxNumberOfSynapses = outputConnection.numberOfSynapses;
}
}
else
{
maxNumberOfHiddenNeurons = 0;
maxNumberOfSynapses = 0;
//direct input to output connection
outputConnection = new NeuralNetworkLayerConnection(inputLayer, outputLayer);
if (outputConnection.numberOfSynapses > maxNumberOfSynapses)
{
maxNumberOfSynapses = outputConnection.numberOfSynapses;
}
}
}
/// <summary>
/// Create new struct from existing.
/// </summary>
/// <param name="src">Existing to copy.</param>
public NeuralNetworkLayerConnection(NeuralNetworkLayerConnection src)
{
numberOfSynapses = src.numberOfSynapses;
weights = new float[numberOfSynapses];
}