private void PrepareAndTransmitSynchronisation(ComponentizedEntity entity, int tick, bool isFromClient, ClientAuthoritiveMode clientAuthoritiveMode)
{
if (!_uniqueIdentifierForEntity.HasValue)
{
throw new InvalidOperationException("PrepareAndTransmit should not be called without an entity ID!");
}
// If the entity is a synchronised entity, collect properties of the synchronised object
// directly.
var synchronisedEntity = entity as ISynchronisedObject;
if (synchronisedEntity != null)
{
_synchronisationContext = synchronisedEntity;
_synchronisationContext.DeclareSynchronisedProperties(this);
}
// Iterate through all the components on the entity and get their synchronisation data as well.
foreach (var synchronisedComponent in entity.Components.OfType <ISynchronisedObject>())
{
_synchronisationContext = synchronisedComponent;
_synchronisationContext.DeclareSynchronisedProperties(this);
}
// Sync properties to each client.
foreach (var dispatcher in _networkEngine.CurrentDispatchers)
{
foreach (var group in dispatcher.ValidClientGroups)
{
if (ClientAuthoritiveMode != ClientAuthoritiveMode.None &&
ClientOwnership != null &&
OnlySendToAuthoritiveClient)
{
if (ClientOwnership != group)
{
// This client doesn't own the entity, and this entity is only
// synchronised with clients that own it.
continue;
}
}
if (isFromClient || _clientsEntityIsKnownOn.Contains(group))
{
if (_synchronisedData.Count > 0)
{
// Now calculate the delta to transmit over the network.
var currentTick = tick; // TODO: Use TimeTick
_synchronisedDataToTransmit.Clear();
foreach (var data in _synchronisedData.Values)
{
var needsSync = false;
// Check the target for this data to see whether or not we send it to
// this particular client.
if (data.SynchronisationTargets == SynchroniseTargets.OwningClient &&
(ClientOwnership == null ||
!(ClientOwnership == group)))
{
// This data should only be synchronised to the owning client, and
// we are not the owning client.
continue;
}
else if (data.SynchronisationTargets == SynchroniseTargets.NonOwningClients &&
(ClientOwnership == null ||
ClientOwnership == group))
{
// This data should only be synchronised to non-owning clients, and
// we either are the owning client, or no client ownership has been set.
continue;
}
// If we're on the client and we haven't had an initial piece of data from the server,
// we never synchronise because we don't know what the initial value is.
if (isFromClient && !data.HasReceivedInitialSync.GetOrDefault(group, false))
{
continue;
}
// If we haven't performed the initial synchronisation, we always transmit the data.
if (!data.HasPerformedInitialSync.GetOrDefault(group, false))
{
_networkEngine.LogSynchronisationEvent(
"Must send property '" + data.Name + "' on entity ID " + _uniqueIdentifierForEntity +
" because the endpoint " + group + " has not received it's initial sync.");
needsSync = true;
}
// If we are on the client (i.e. the client assumes it's authoritive), or if the
// server knows that the client does not have authority, then allow this next section.
// Or to put it another way, if we're not on the client and we know the client has
// authority, only transmit data for the first time because the client will make
// decisions from that point onwards.
if (isFromClient || clientAuthoritiveMode != ClientAuthoritiveMode.TrustClient ||
(clientAuthoritiveMode == ClientAuthoritiveMode.TrustClient &&
group != ClientOwnership))
{
var lastValue = data.LastValue;
var currentValue = data.CurrentValue;
if (lastValue is ITransform)
{
throw new InvalidOperationException(
"Last value property got stored as ITransform, but should have been stored as NetworkTransform!");
}
if (currentValue is ITransform)
{
currentValue = ((ITransform)currentValue).SerializeToNetwork();
}
if (!Equals(lastValue, currentValue))
{
if (data.LastFrameSynced.GetOrDefault(group, 0) + data.FrameInterval < currentTick)
{
_networkEngine.LogSynchronisationEvent(
"Sending property '" + data.Name + "' on entity ID " + _uniqueIdentifierForEntity +
" because the value has changed (old value: " + lastValue + ", new value: " + currentValue + ")," +
" and the next frame synced target for group " + group + "" +
" is " + (data.LastFrameSynced.GetOrDefault(group, 0) + data.FrameInterval) + "" +
" and the current tick is " + currentTick + ".");
needsSync = true;
}
}
}
if (needsSync)
{
_synchronisedDataToTransmit.Add(data);
}
}
if (_synchronisedDataToTransmit.Count > 0)
{
// Build up the synchronisation message.
var message = new EntityPropertiesMessage();
message.EntityID = _uniqueIdentifierForEntity.Value;
message.FrameTick = currentTick;
message.PropertyNames = new string[_synchronisedDataToTransmit.Count];
message.PropertyTypes = new int[_synchronisedDataToTransmit.Count];
message.IsClientMessage = isFromClient;
message.MessageOrder = _messageOrder++;
bool reliable;
AssignSyncDataToMessage(_synchronisedDataToTransmit, message, currentTick, group, out reliable);
// Send an entity properties message to the client.
_networkEngine.Send(
dispatcher,
group,
message,
reliable);
}
}
}
}
}
}
