/**
* @param parent1 More fit parent
* @param parent2 Less fit parent
* Operating on a Genome object
*/
public void Crossover(Genome parent1, Genome parent2)
{
foreach (NodeGene parentNode in parent1.Nodes.Values)
{
AddNodeGene(parentNode.Copy());
}
foreach (ConnectionGene parentNode in parent1.Connections.Values)
{
if (parent2.Connections.ContainsKey(parentNode.Innovation)) // matching gene
{
ConnectionGene childConGene = (Random.Range(0f, 1f) >= 0.0) ? new ConnectionGene(parentNode) : new ConnectionGene(parent2.Connections[parentNode.Innovation]);
AddConnectionGene(childConGene);
}
else // disjoint or excess gene
{
ConnectionGene childConGene = parentNode.Copy();
AddConnectionGene(childConGene);
}
}
}
public void AddConnectionGene(ConnectionGene gene)
{
Connections.Add(gene.Innovation, gene);
}
public void AddConnectionMutation(Counter innovation, int maxAttempts)
{
int tries = 0;
bool success = false;
while (tries < maxAttempts && success == false)
{
tries++;
int listSize = Nodes.Count;
int randomNodeKey1 = Random.Range(0, listSize - 1);
int randomNodeKey2 = Random.Range(0, listSize - 1);
while (!Nodes.ContainsKey(randomNodeKey1) || !Nodes.ContainsKey(randomNodeKey2))
{
randomNodeKey1 = Random.Range(0, listSize - 1);
randomNodeKey2 = Random.Range(0, listSize - 1);
}
NodeGene node1 = Nodes[randomNodeKey1];
NodeGene node2 = Nodes[randomNodeKey2];
bool reversed = false;
if (node1.GetType().Equals(NodeGene.NodeType.HIDDEN) && node2.GetType().Equals(NodeGene.NodeType.INPUT))
{
reversed = true;
}
else if (node1.GetType().Equals(NodeGene.NodeType.OUTPUT) && node2.GetType().Equals(NodeGene.NodeType.HIDDEN))
{
reversed = true;
}
else if (node1.GetType().Equals(NodeGene.NodeType.OUTPUT) && node2.GetType().Equals(NodeGene.NodeType.INPUT))
{
reversed = true;
}
bool connectionImpossible = false;
if (node1.GetType().Equals(NodeGene.NodeType.INPUT) && node2.GetType().Equals(NodeGene.NodeType.INPUT))
{
connectionImpossible = true;
}
else if (node1.GetType().Equals(NodeGene.NodeType.OUTPUT) && node2.GetType().Equals(NodeGene.NodeType.OUTPUT))
{
connectionImpossible = true;
}
bool connectionExists = false;
foreach (ConnectionGene con in Connections.Values)
{
if (con.InNode == node1.ID && con.OutNode == node2.ID)
{
connectionExists = true;
break;
}
else if (con.InNode == node2.ID && con.OutNode == node1.ID)
{
connectionExists = true;
break;
}
}
if (connectionExists || connectionImpossible)
{
continue;
}
ConnectionGene newCon = new ConnectionGene(reversed ? node2.ID : node1.ID, reversed ? node1.ID : node2.ID, Random.Range(0f, 1f), true, innovation.GetInnovation());
//Connections.Add(newCon.Innovation, newCon);
AddConnectionGene(newCon);
success = true;
}
if (success == false)
{
Debug.Log("Tried, but could not add more connections");
}
}