public void WriteDeltaEntities(BaseClient client, ClientFrame to, ClientFrame from, BufferWrite buf)
{
var u = new EntityWriteInfo();
u.Buf = buf;
u.To = to;
u.ToSnapshot = to.GetSnapshot();
u.Baseline = client.Baseline;
u.FullProps = 0;
u.Server = this;
u.ClientEntity = client.EntityIndex;
u.CullProps = true;
if (from != null)
{
u.AsDelta = true;
u.From = from;
u.FromSnapshot = from.GetSnapshot();
}
else
{
u.AsDelta = false;
u.From = null;
u.FromSnapshot = null;
}
u.HeaderCount = 0;
// set from_baseline pointer if this snapshot may become a baseline update
if (client.BaselineUpdateTick == -1)
{
// TODO: Clear client baselines sent
// TODO: Set 'to' from baseline to client.BaselinesSent
}
u.Buf.WriteUShort((ushort)ENetCommand.SvcPacketEntities);
u.Buf.WriteInt(u.ToSnapshot.NumEntities);
if (u.AsDelta)
{
u.Buf.WriteByte(1);
u.Buf.WriteInt(u.From.TickCount);
}
else
{
u.Buf.WriteByte(0);
}
u.Buf.WriteInt(client.BaselineUsed);
// Store off current position
var savePos = u.Buf.Position;
}
public void CopyFrame(ClientFrame frame)
{
TickCount = frame.TickCount;
SetSnapshot(frame.GetSnapshot());
}
public virtual void SendSnapshot(ClientFrame frame)
{
// do not send same snapshot twice
if (_lastSnapshot == frame.GetSnapshot())
{
NetChannel.Transmit();
return;
}
// if we send a full snapshot (no delta-compression) before, wait until client
// received and acknowledge that update. don't spam client with full updates
if (_forceWaitForTick > 0)
{
NetChannel.Transmit();
return;
}
var msg = new BufferWrite();
var deltaFrame = GetDeltaFrame(_deltaTick);
if (deltaFrame == null)
{
// We need to send a full update and reset the instanced baselines
OnRequestFullUpdate();
}
var tickmsg = new NetMessageTick(frame.TickCount, Program.HostFrametimeUnbounded, Program.HostFrametimeStdDeviation);
tickmsg.WriteToBuffer(msg);
// send entity update, delta compressed if deltaFrame != NULL
Server.WriteDeltaEntities(this, frame, deltaFrame, msg);
var maxTempEnts = 255;
Server.WriteTempEntities(this, frame.GetSnapshot(), _lastSnapshot, msg, maxTempEnts);
_lastSnapshot = frame.GetSnapshot();
if (NetChannel == null)
{
_deltaTick = frame.TickCount;
return;
}
bool sendOk;
if (deltaFrame == null)
{
sendOk = NetChannel.SendData(msg);
sendOk = sendOk && NetChannel.Transmit();
// remember this tickcount we send the reliable snapshot
// so we can continue sending other updates if this has been acknowledged
_forceWaitForTick = frame.TickCount;
}
else
{
sendOk = NetChannel.SendDatagram(msg) > 0;
}
if (!sendOk)
{
Disconnect("Error! Couldn't send snapshot");
}
}