Progress on tutorial, gap tweaking (water flows faster from room to room), UPnP error messages, input keys in array, underwater aiming tweaking, tons of misc stuff commit more often ffs

Lidgren.Network/NetReliableSequencedReceiver.cs

@@ -0,0 +1,63 @@
+using System;
+
+namespace Lidgren.Network
+{
+	internal sealed class NetReliableSequencedReceiver : NetReceiverChannelBase
+	{
+		private int m_windowStart;
+		private int m_windowSize;
+
+		public NetReliableSequencedReceiver(NetConnection connection, int windowSize)
+			: base(connection)
+		{
+			m_windowSize = windowSize;
+		}
+
+		private void AdvanceWindow()
+		{
+			m_windowStart = (m_windowStart + 1) % NetConstants.NumSequenceNumbers;
+		}
+
+		internal override void ReceiveMessage(NetIncomingMessage message)
+		{
+			int nr = message.m_sequenceNumber;
+
+			int relate = NetUtility.RelativeSequenceNumber(nr, m_windowStart);
+
+			// ack no matter what
+			m_connection.QueueAck(message.m_receivedMessageType, nr);
+
+			if (relate == 0)
+			{
+				// Log("Received message #" + message.SequenceNumber + " right on time");
+
+				//
+				// excellent, right on time
+				//
+
+				AdvanceWindow();
+				m_peer.ReleaseMessage(message);
+				return;
+			}
+
+			if (relate < 0)
+			{
+				m_peer.LogVerbose("Received message #" + message.m_sequenceNumber + " DROPPING LATE or DUPE");
+				return;
+			}
+
+			// relate > 0 = early message
+			if (relate > m_windowSize)
+			{
+				// too early message!
+				m_peer.LogDebug("Received " + message + " TOO EARLY! Expected " + m_windowStart);
+				return;
+			}
+
+			// ok
+			m_windowStart = (m_windowStart + relate) % NetConstants.NumSequenceNumbers;
+			m_peer.ReleaseMessage(message);
+			return;
+		}
+	}
+}