/// <summary>
/// Create a fresh start for an <see cref="Neat"/> object
/// </summary>
private void Reset()
{
AllConnections.Clear();
AllNodes.Clear();
AllClients.Clear();
for (int i = 0; i < Constants.InputSize; i++)
{
NodeGene node = CreateNode();
node.X = 0.1;;
node.Y = (i + 1) / (double)(Constants.InputSize + 1);
}
for (int i = 0; i < Constants.OutputSize; i++)
{
NodeGene node = CreateNode();
node.X = 0.9;;
node.Y = (i + 1) / (double)(Constants.OutputSize + 1);
ActivationEnumeration a = ActivationEnumeration.Random();
node.Activation = a.Activation;
node.ActivationName = a.Name;
}
for (int i = 0; i < Constants.MaxClients; i++)
{
Client c = new Client(EmptyGenome());
AllClients.Add(c);
}
}
///<inheritdoc/>
public void MutateActivationRandom()
{
NodeGene node = Nodes.RandomElement();
if (node?.X > 0.1)
{
ActivationEnumeration a = ActivationEnumeration.Random();
node.Activation = a.Activation;
node.ActivationName = a.Name;
}
}
///<inheritdoc/>
public void MutateNode()
{
ConnectionGene connection = Connections.RandomElement();
if (connection == null)
{
return;
}
NodeGene from = connection.In;
NodeGene to = connection.Out;
int replaceIndex = Neat.GetReplaceIndex(from, to);
NodeGene middle;
if (replaceIndex == 0)
{
ActivationEnumeration a = ActivationEnumeration.Random();
middle = Neat.CreateNode();
middle.X = (from.X + to.X) / 2;
middle.Y = ((from.Y + to.Y) / 2) + (ThreadSafeRandom.NormalRand(0, 0.02f) / 2);
middle.Activation = a.Activation;
middle.ActivationName = a.Name;
Neat.SetReplaceIndex(from, to, middle.InnovationNumber);
}
else
{
middle = Neat.GetNode(replaceIndex);
}
ConnectionGene connection1 = Neat.GetConnection(from, middle);
ConnectionGene connection2 = Neat.GetConnection(middle, to);
connection1.Weight = 1;
connection2.Weight = connection.Weight;
connection2.Enabled = connection.Enabled;
connection.Enabled = false;
Connections.Add(connection1);
Connections.Add(connection2);
Nodes.Add(middle);
}
