public void AddNodeMutation(Random r) //insert a node between two connected nodes
{
int conKey = connectionKeys[r.Next(connectionKeys.Count)]; //get a random connection
ConnectionGene con = connectionList[conKey];
int node1 = con.GetInNode();
int node2 = con.GetOutNode();
con.Disable(); //disable connection
NodeGene newNode = new NodeGene(nodeList.Count + 1, NodeGene.TYPE.HIDDEN); //create a new node
nodeList.Add(newNode); //add new node to node list
int innovation1 = InnovationGenerator.GetInnovation();
int innovation2 = InnovationGenerator.GetInnovation();
connectionKeys.Add(innovation1);
connectionList.Add(innovation1, new ConnectionGene(node1, newNode.GetID(), 1f, true, innovation1)); //add new connections to connection list
connectionKeys.Add(innovation2);
connectionList.Add(innovation2, new ConnectionGene(newNode.GetID(), node2, con.GetWeight(), true, innovation2));
}
public void MutateAddNode()
{
ConnectionGene randomConnection = GetConnectionGenes()[random.Next(GetConnectionGenes().Count)];
NodeGene InNode = GetNodeGenes()[randomConnection.GetInputNode()];
NodeGene OutNode = GetNodeGenes()[randomConnection.GetOutputNode()];
randomConnection.SetEnabled(false);
NodeGene MiddleNode = new NodeGene(GetNodeGenes().Count + 1, NodeGene.TYPE.HIDDEN, 0);
ConnectionGene InputToMiddle = new ConnectionGene(InNode.GetID(), MiddleNode.GetID(), 1, true, NEAT_CONFIGS.GLOBAL_INNOVATION_NUMBER++);
ConnectionGenes.Add(InputToMiddle);
MiddleNode.AddIncomingConnection(InputToMiddle);
ConnectionGene MiddleToOutput = new ConnectionGene(MiddleNode.GetID(), OutNode.GetID(), randomConnection.GetWeight(), true, NEAT_CONFIGS.GLOBAL_INNOVATION_NUMBER++);
ConnectionGenes.Add(MiddleToOutput);
OutNode.AddIncomingConnection(MiddleToOutput);
//Add to the total current Pool Connections Made in this instance
NodeGenes.Add(MiddleNode.GetID(), MiddleNode);
}
public void MutateAddConnection()
{
List <int> Keys = new List <int>(NodeGenes.Keys);
int randomKey1 = Keys[random.Next(Keys.Count)];
int randomKey2 = Keys[random.Next(Keys.Count)];
NodeGene node1 = NodeGenes[randomKey1];
NodeGene node2 = NodeGenes[randomKey2];
int ATTEMPTS = 0;
while ((node1.GetType() == NodeGene.TYPE.OUTPUT && node2.GetType() == NodeGene.TYPE.OUTPUT || node1.GetType() == NodeGene.TYPE.INPUT && node2.GetType() == NodeGene.TYPE.INPUT) || node1.GetID() == node2.GetID() ||
(node1.GetType() == NodeGene.TYPE.BIAS && node2.GetType() == NodeGene.TYPE.INPUT || node2.GetType() == NodeGene.TYPE.BIAS && node1.GetType() == NodeGene.TYPE.INPUT) || ATTEMPTS < 10)
{
randomKey1 = Keys[random.Next(Keys.Count)];
node1 = NodeGenes[randomKey1];
ATTEMPTS++;
}
if (ATTEMPTS < 10)
{
bool NeedsReversing = false;
if ((node1.GetType() == NodeGene.TYPE.HIDDEN && node2.GetType() == NodeGene.TYPE.INPUT) || (node1.GetType() == NodeGene.TYPE.HIDDEN && node2.GetType() == NodeGene.TYPE.BIAS))
{
NeedsReversing = true;
}
else
{
if (node1.GetType() == NodeGene.TYPE.OUTPUT && node2.GetType() == NodeGene.TYPE.INPUT || node1.GetType() == NodeGene.TYPE.OUTPUT && node2.GetType() == NodeGene.TYPE.BIAS || node1.GetType() == NodeGene.TYPE.OUTPUT && node2.GetType() == NodeGene.TYPE.HIDDEN)
{
NeedsReversing = true;
}
}
bool ExistsInGenome = false;
foreach (ConnectionGene connection in GetConnectionGenes())
{
if (connection.GetInputNode() == node1.GetID() && connection.GetOutputNode() == node2.GetID())
{
ExistsInGenome = true;
break;
}
else
{
if (connection.GetOutputNode() == node1.GetID() && connection.GetInputNode() == node2.GetID())
{
ExistsInGenome = true;
}
}
}
if (!ExistsInGenome)
{
bool ExistsInPopulation = false;
foreach (ConnectionGene connection in PoolManager.TOTALCONNECTIONSMADETHISGENERATION)
{
if (connection.GetInputNode() == node1.GetID() && connection.GetOutputNode() == node2.GetID() || connection.GetOutputNode() == node1.GetID() && connection.GetInputNode() == node2.GetID())
{
ExistsInPopulation = true;
ConnectionGene newConnection = new ConnectionGene(NeedsReversing ? node2.GetID() : node1.GetID(), NeedsReversing ? node1.GetID() : node2.GetID(), random.NextDouble(), true, connection.GetInnovation());
ConnectionGenes.Add(newConnection);
GetNodeGenes()[newConnection.GetOutputNode()].AddIncomingConnection(newConnection);
break;
}
}
if (!ExistsInPopulation)
{
ConnectionGene newConnection = new ConnectionGene(NeedsReversing ? node2.GetID() : node1.GetID(), NeedsReversing ? node1.GetID() : node2.GetID(), random.NextDouble(), true, NEAT_CONFIGS.GLOBAL_INNOVATION_NUMBER++);
ConnectionGenes.Add(newConnection);
GetNodeGenes()[newConnection.GetOutputNode()].AddIncomingConnection(newConnection);
PoolManager.TOTALCONNECTIONSMADETHISGENERATION.Add(newConnection);
}
}
}
}