Controllers don't have to be wired directly to an item for camera focus to work (= railguns and cameras can be used over wifi). Closes #535

Barotrauma/BarotraumaClient/Source/Items/Components/Machines/Controller.cs

@@ -6,9 +6,7 @@ namespace Barotrauma.Items.Components
     {
         public override void DrawHUD(SpriteBatch spriteBatch, Character character)
         {
-            var focusTarget = GetFocusTarget();
-            if (focusTarget == null) return;
-            if (character.ViewTarget == focusTarget)
+            if (focusTarget != null && character.ViewTarget == focusTarget)
             {
                 foreach (ItemComponent ic in focusTarget.components)
                 {

Barotrauma/BarotraumaShared/Source/Items/Components/Machines/Controller.cs

@@ -33,6 +33,9 @@ namespace Barotrauma.Items.Components
 
         private Character character;
 
+        private Item focusTarget;
+        private float targetRotation;
+
         public Vector2 UserPos
         {
             get { return userPos; }
@@ -174,7 +177,7 @@ namespace Barotrauma.Items.Components
             
             return true;
         }
-
+        
         public override bool SecondaryUse(float deltaTime, Character character = null)
         {
             if (this.character != character)
@@ -190,7 +193,7 @@ namespace Barotrauma.Items.Components
             }
             if (character == null) return false;     
 
-            Entity focusTarget = GetFocusTarget();
+            focusTarget = GetFocusTarget();
             if (focusTarget == null)
             {
                 Vector2 centerPos = new Vector2(item.WorldRect.Center.X, item.WorldRect.Center.Y);
@@ -198,9 +201,7 @@ namespace Barotrauma.Items.Components
                 Vector2 offset = character.CursorWorldPosition - centerPos;
                 offset.Y = -offset.Y;
 
-                float targetRotation = MathUtils.WrapAngleTwoPi(MathUtils.VectorToAngle(offset));
-
-                item.SendSignal(0, targetRotation.ToString(), "position_out", character);
+                targetRotation = MathUtils.WrapAngleTwoPi(MathUtils.VectorToAngle(offset));
                 return false;
             }
             
@@ -211,7 +212,7 @@ namespace Barotrauma.Items.Components
                 Lights.LightManager.ViewTarget = focusTarget;
                 cam.TargetPos = focusTarget.WorldPosition;
 
-                cam.OffsetAmount = MathHelper.Lerp(cam.OffsetAmount, (focusTarget as Item).Prefab.OffsetOnSelected, deltaTime*10.0f);
+                cam.OffsetAmount = MathHelper.Lerp(cam.OffsetAmount, (focusTarget as Item).Prefab.OffsetOnSelected, deltaTime * 10.0f);
             }
 #endif
             
@@ -232,9 +233,7 @@ namespace Barotrauma.Items.Components
                 Vector2 offset = character.CursorWorldPosition - centerPos;
                 offset.Y = -offset.Y;
 
-                float targetRotation = MathUtils.WrapAngleTwoPi(MathUtils.VectorToAngle(offset));
-
-                item.SendSignal(0, targetRotation.ToString(), "position_out", character);
+                targetRotation = MathUtils.WrapAngleTwoPi(MathUtils.VectorToAngle(offset));
             }
 
             return true;
@@ -242,17 +241,16 @@ namespace Barotrauma.Items.Components
 
         private Item GetFocusTarget()
         {
-            foreach (Connection c in item.Connections)
-            {
-                if (c.Name != "position_out") continue;
+            item.SendSignal(0, targetRotation.ToString(), "position_out", character);
 
-                foreach (Connection c2 in c.Recipients)
+            for (int i = item.LastSentSignalRecipients.Count - 1; i >= 0; i--)
+            {
+                if (item.LastSentSignalRecipients[i].Prefab.FocusOnSelected)
                 {
-                    if (c2 == null || c2.Item == null || !c2.Item.Prefab.FocusOnSelected) continue;
-                    return c2.Item;
+                    return item.LastSentSignalRecipients[i];
                 }
             }
-
+            
             return null;
         }
 

Barotrauma/BarotraumaShared/Source/Items/Components/Signal/Connection.cs

@@ -160,6 +160,11 @@ namespace Barotrauma.Items.Components
                 if (recipient == null) continue;
                 if (recipient.item == this.item || recipient.item == source) continue;
 
+                if (source != null && !source.LastSentSignalRecipients.Contains(recipient.item))
+                {
+                    source.LastSentSignalRecipients.Add(recipient.item);
+                }
+
                 foreach (ItemComponent ic in recipient.item.components)
                 {
                     ic.ReceiveSignal(stepsTaken, signal, recipient, item, sender, power);

Barotrauma/BarotraumaShared/Source/Items/Components/Signal/WifiComponent.cs

@@ -95,6 +95,16 @@ namespace Barotrauma.Items.Components
                     foreach (WifiComponent wifiComp in receivers)
                     {
                         wifiComp.item.SendSignal(stepsTaken, signal, "signal_out", sender);
+                        if (source != null)
+                        {
+                            foreach (Item receiverItem in wifiComp.item.LastSentSignalRecipients)
+                            {
+                                if (!source.LastSentSignalRecipients.Contains(receiverItem))
+                                {
+                                    source.LastSentSignalRecipients.Add(receiverItem);
+                                }
+                            }
+                        }
                     }
                     break;
             }

Barotrauma/BarotraumaShared/Source/Items/Item.cs

@@ -268,7 +268,16 @@ namespace Barotrauma
                 return IsInWater();
             }
         }
-        
+
+        /// <summary>
+        /// A list of items the last signal sent by this item went through
+        /// </summary>
+        public List<Item> LastSentSignalRecipients
+        {
+            get;
+            private set;
+        } = new List<Item>();
+
         public ItemPrefab Prefab
         {
             get { return prefab; }
@@ -1011,9 +1020,10 @@ namespace Barotrauma
                 }
             }
         }
-
+        
         public void SendSignal(int stepsTaken, string signal, string connectionName, Character sender, float power = 0.0f)
         {
+            LastSentSignalRecipients.Clear();
             if (connections == null) return;
 
             stepsTaken++;