void Mutate()
{
int n = Random.Range(0, 6);
switch (n)
{
case 0:
//Mutation: Add a Gene and its connections
AddGene();
break;
//case 0:
// //Mutation: Remove Gene and its connections
// break;
case 1:
//Mutation: Add simple Connection
Gene i, o;
float w = Random.Range(-1f, 1f);
//Select a gene from input genes
i = genes[Random.Range(0, numberInput)];
//Select the next gene (output or middle one)
//(The last gene created is excluded since it make no sense to be connected to itself)
o = genes[Random.Range(numberInput, counterGenes)];
ConnectionGene c = population.GetConnection(i, o, w);
connections.Add(c.GetID(), c);
break;
case 2:
//RemoveConnection(connections[Random.Range(0,connections.Count)]);
break;
case 3:
//Mutation: Change weigths
for (int j = 0; j < connections.Count / 2; j++)
{
w = connections[j].GetWeight();
connections[j].SetWeight(w + mutationFactor * Random.Range(-1, -1));
}
break;
case 4:
//Mutation: toogle enabled
//connections[Random.Range(0, connections.Count)].ChangeEnabled();
break;
case 5:
//Mutation: Change activation function
int func = Random.Range(0, 1);
genes[Random.Range(0, genes.Count)].SetActivationFunction(func);
break;
default:
break;
}
}
/// <summary>
/// Add a specific connection between from Gene and to Gene with a given weight
/// </summary>
/// <param name="from"></param>
/// <param name="to"></param>
/// <param name="weight"></param>
public void AddConnection(Gene from, Gene to, float weight)
{
ConnectionGene c = population.GetConnection(from, to, weight);
//if (!from.HasConnection(c))
{
from.AddConnection(c);
to.AddInput();
connections.Add(c.GetID(), c);
}
}
public void RemoveConnection(ConnectionGene connection)
{
connections.Remove(connection.GetID());
connection = null;//not best solution, can bring to memory leaks
}