public bool[] Propagate(int[] inputs)
{
var inputNodes = InputNodes;
if (inputs.Length != inputNodes.Count)
{
throw new Exception("Number of inputs does not match number of genome inputs");
}
var connectionsToPropagate = ConnectionGenes.Values.Where(cg => cg.IsEnabled).ToList();
if (connectionsToPropagate.Count == 0)
{
return(OutputNodes.Select(x => x.Value > 0).ToArray());
}
foreach (var node in NodeGenes.Values)
{
node.Value = 0;
node.IsReady = false;
}
for (int i = 0; i < inputs.Length; i++)
{
inputNodes[i].Value = inputs[i];
inputNodes[i].IsReady = true;
}
while (connectionsToPropagate.Count != 0)
{
var propagatedConnections = new List <ConnectionGene>();
foreach (var connectionGene in connectionsToPropagate)
{
var previouesNode = NodeGenes[connectionGene.PreviousNodeId];
if (!previouesNode.IsReady)
{
continue;
}
var nextNode = NodeGenes[connectionGene.NextNodeId];
nextNode.Value += previouesNode.Value * connectionGene.Weight;
propagatedConnections.Add(connectionGene);
if (!connectionsToPropagate.Any(cg => cg.NextNodeId == connectionGene.NextNodeId && cg != connectionGene))
{
nextNode.Value = ActivationFunctions.Sigmoid.Count(nextNode.Value);
nextNode.IsReady = true;
}
}
// No changes in propagation; Input values cannot be passed further
if (propagatedConnections.Count == 0)
{
break;
}
foreach (var propagatedConnectionGene in propagatedConnections)
{
connectionsToPropagate.Remove(propagatedConnectionGene);
}
}
return(OutputNodes.Select(x => x.Value > 0).ToArray());
}