public void ApplyMutation(ref NetModel net)
{
if (net.Connections.Count == 0)
{
return;
}
// Shifts weight
var rnd = new Random();
var connectionId = rnd.Next(0, net.Connections.Count);
net.Connections[connectionId].Weight *= rnd.NextDouble();
// Saves change
_connectionProcessor.Update(net.Connections[connectionId]);
}
/// <summary>
/// Changes enabled/disabled state of specific connection
/// </summary>
/// <param name="net">Network that contains connection</param>
/// <param name="connId">Connections id int list (not db id and not innovation id)</param>
private void ToggleConnection(ref NetModel net, int connId)
{
net.Connections[connId].Enabled = !net.Connections[connId].Enabled;
_connectionProcessor.Update(net.Connections[connId]);
}
public void ApplyMutation(ref NetModel net)
{
// There is no connection thus no point of trying to insert node,
// because it can only be inserted between two nodes AKA in connection
if (net.Connections.Count == 0)
{
return;
}
// Finds connection - random
var rnd = new Random();
var connection = net.Connections[rnd.Next(0, net.Connections.Count)];
// Gets innovation id for new node
var innovation = _innovationController.FetchWithInsertOnFail(new InnovationModel
{
BatchId = net.BatchId,
NodeFromId = connection.FromId,
NodeToId = connection.ToId,
Type = InnovationType.Node
});
// Makes two new connections, thus inserting new node between two others
var connFromToNew = new ConnectionModel
{
FromId = connection.FromId,
ToId = innovation.Id,
NetworkId = net.Id,
InnovationId = _innovationController.FetchWithInsertOnFail(new InnovationModel
{
BatchId = net.BatchId,
NodeFromId = connection.FromId,
NodeToId = innovation.Id,
Type = InnovationType.Connection
}).Id
};
_connectionProcessor.Save(ref connFromToNew);
net.Connections.Add(connFromToNew);
var connNewToTo = new ConnectionModel
{
FromId = innovation.Id,
ToId = connection.ToId,
NetworkId = net.Id,
InnovationId = _innovationController.FetchWithInsertOnFail(new InnovationModel
{
BatchId = net.BatchId,
NodeFromId = innovation.Id,
NodeToId = connection.ToId,
Type = InnovationType.Connection
}).Id
};
_connectionProcessor.Save(ref connNewToTo);
net.Connections.Add(connNewToTo);
// Disables old connection
connection.Enabled = false;
_connectionProcessor.Update(connection);
// Create new node only if it doesn't exist
if (net.Nodes.Any(n => n.InnovationId == innovation.Id))
{
return;
}
var nodeModel = new NodeModel
{
InnovationId = innovation.Id,
NetworkId = net.Id
};
_nodeProcessor.Save(ref nodeModel);
net.Nodes.Add(nodeModel);
}
