From 2239e336f56a13cdfaf6e8073e008efd361b8bed Mon Sep 17 00:00:00 2001
From: teascade <teascade@gmail.com>
Date: Tue, 9 May 2017 08:15:24 +0300
Subject: [PATCH] Add timestamps to movement packets

---
 Assets/Scripts/Networking/Messages/MoveCreaturePkt.cs |  7 +++++++
 Assets/Scripts/Networking/NetworkHelper.cs            | 10 ++++++++++
 Assets/Scripts/Networking/Serverside/Server.cs        |  1 +
 3 files changed, 18 insertions(+)

diff --git a/Assets/Scripts/Networking/Messages/MoveCreaturePkt.cs b/Assets/Scripts/Networking/Messages/MoveCreaturePkt.cs
index cc17820..92298bd 100644
--- a/Assets/Scripts/Networking/Messages/MoveCreaturePkt.cs
+++ b/Assets/Scripts/Networking/Messages/MoveCreaturePkt.cs
@@ -19,6 +19,11 @@ namespace Cyber.Networking.Messages {
         /// </summary>
         public int SyncBaseID;
 
+        /// <summary>
+        /// Time when server received this request. Used for compensating ping.
+        /// </summary>
+        public double Timestamp;
+
         /// <summary>
         /// Creates a MoveCreaturePkt which contains the direction of desired movement (or (0, 0, 0) for stopping)
         /// </summary>
@@ -43,6 +48,7 @@ namespace Cyber.Networking.Messages {
         public override void Deserialize(NetworkReader reader) {
             Direction = reader.ReadVector3();
             SyncBaseID = reader.ReadInt32();
+            Timestamp = reader.ReadDouble();
         }
 
         /// <summary>
@@ -52,6 +58,7 @@ namespace Cyber.Networking.Messages {
         public override void Serialize(NetworkWriter writer) {
             writer.Write(Direction);
             writer.Write(SyncBaseID);
+            writer.Write(Timestamp);
         }
 
     }
diff --git a/Assets/Scripts/Networking/NetworkHelper.cs b/Assets/Scripts/Networking/NetworkHelper.cs
index 4f7ab0f..cc12fa3 100644
--- a/Assets/Scripts/Networking/NetworkHelper.cs
+++ b/Assets/Scripts/Networking/NetworkHelper.cs
@@ -51,5 +51,15 @@ namespace Cyber.Networking {
             return IntArray;
         }
 
+        /// <summary>
+        /// Returns the current system time in seconds.
+        /// </summary>
+        /// <returns>The system time in seconds.</returns>
+        public static double GetCurrentSystemTime() {
+            return DateTime.Now.ToUniversalTime().Subtract(
+                   new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc))
+                   .TotalMilliseconds * 1.0 / 1000;
+        }
+
     }
 }
diff --git a/Assets/Scripts/Networking/Serverside/Server.cs b/Assets/Scripts/Networking/Serverside/Server.cs
index e63444e..6d3e9ef 100644
--- a/Assets/Scripts/Networking/Serverside/Server.cs
+++ b/Assets/Scripts/Networking/Serverside/Server.cs
@@ -141,6 +141,7 @@ namespace Cyber.Networking.Serverside {
                         if (Player.Value.ConnectionID == msg.conn.connectionId) {
                             continue;
                         }
+                        MoveCreature.Timestamp = NetworkHelper.GetCurrentSystemTime();
                         NetworkServer.SendToClient(Player.Value.ConnectionID, PktType.MoveCreature, MoveCreature);
                     }
                     break;