Server doesn't send character position updates to far-away clients, clients disable characters if they haven't received position updates in a while

Subsurface/Source/Characters/AICharacter.cs

@@ -33,16 +33,16 @@ namespace Barotrauma
 
         public override void Update(Camera cam, float deltaTime)
         {
-            if (!Enabled) return;
-
             base.Update(cam, deltaTime);
+
+            if (!Enabled) return;
             
-            float dist = Vector2.Distance(cam.WorldViewCenter, WorldPosition);
-            if (dist > 8000.0f)
+            float dist = Vector2.DistanceSquared(cam.WorldViewCenter, WorldPosition);
+            if (dist > 8000.0f * 8000.0f)
             {
                 AnimController.SimplePhysicsEnabled = true;
             }
-            else if (dist < 7000.0f)
+            else if (dist < 7000.0f * 7000.0f)
             {
                 AnimController.SimplePhysicsEnabled = false;
             }

Subsurface/Source/Characters/Animation/Ragdoll.cs

@@ -1125,14 +1125,14 @@ namespace Barotrauma
 
         public void SetPosition(Vector2 simPosition, bool lerp = false)
         {
-            Vector2 moveAmount = simPosition - Collider.SimPosition;
+            Vector2 limbMoveAmount = simPosition - MainLimb.SimPosition;
 
             Collider.SetTransform(simPosition, Collider.Rotation);
 
             foreach (Limb limb in Limbs)
             {
                 //check visibility from the new position of the collider to the new position of this limb
-                Vector2 movePos = limb.SimPosition + moveAmount;
+                Vector2 movePos = limb.SimPosition + limbMoveAmount;
 
                 TrySetLimbPosition(limb, simPosition, movePos, lerp);
             }
@@ -1160,7 +1160,7 @@ namespace Barotrauma
             if (lerp)
             {
                 limb.body.TargetPosition = movePos;
-                limb.body.MoveToTargetPosition(Vector2.DistanceSquared(limb.SimPosition, movePos) < 100.0f);                
+                limb.body.MoveToTargetPosition(true);                
             }
             else
             {
@@ -1179,7 +1179,7 @@ namespace Barotrauma
         protected void CheckDistFromCollider()
         {
             float allowedDist = Math.Max(Math.Max(Collider.radius, Collider.width), Collider.height) * 2.0f;                        
-            float resetDist = allowedDist * 10.0f;
+            float resetDist = allowedDist * 5.0f;
 
             float distSqrd = Vector2.DistanceSquared(Collider.SimPosition, MainLimb.SimPosition);
 

Subsurface/Source/Characters/Character.cs

@@ -107,7 +107,7 @@ namespace Barotrauma
 
         public UInt16 LastNetworkUpdateID = 0;
 
-        //public int LargeUpdateTimer;
+        protected float lastRecvPositionUpdateTime;
 
         public readonly Dictionary<string, ObjectProperty> Properties;
         public Dictionary<string, ObjectProperty> ObjectProperties
@@ -1331,7 +1331,7 @@ namespace Barotrauma
 
         public virtual void Update(Camera cam, float deltaTime)
         {
-            if (GameMain.Client!=null && this==Controlled && !isSynced) return;
+            if (GameMain.Client != null && this == Controlled && !isSynced) return;
 
             if (!Enabled) return;
             
@@ -1360,7 +1360,22 @@ namespace Barotrauma
 
             if (this != Character.Controlled)
             {
-                if (GameMain.Server != null && !(this is AICharacter))
+                if (GameMain.Client != null)
+                {
+                    //freeze AI characters if more than 1 seconds have passed since last update from the server
+                    if (lastRecvPositionUpdateTime < NetTime.Now - 1.0f)
+                    {
+                        AnimController.Frozen = true; 
+                        memPos.Clear();
+                        //hide after 2 seconds
+                        if (lastRecvPositionUpdateTime < NetTime.Now - 2.0f)
+                        {
+                            Enabled = false;
+                            return;
+                        }
+                    }                       
+                }
+                else if (GameMain.Server != null && !(this is AICharacter))
                 {
                     if (!AllowInput)
                     {
@@ -1447,8 +1462,9 @@ namespace Barotrauma
                     memInput.RemoveRange(60, memInput.Count - 60);
                 }                
             }
-            else //this == Character.Controlled && GameMain.Client == null
+            else
             {
+                //this == Character.Controlled && GameMain.Client == null
                 AnimController.Frozen = false;
             }
 
@@ -2247,6 +2263,11 @@ namespace Barotrauma
                 case ServerNetObject.ENTITY_POSITION:
                     bool facingRight = AnimController.Dir > 0.0f;
 
+                    lastRecvPositionUpdateTime = (float)NetTime.Now;
+
+                    AnimController.Frozen = false;
+                    Enabled = true;
+
                     UInt16 networkUpdateID = 0;
                     if (msg.ReadBoolean())
                     {