Railguns cannot be fired without aiming. Closes #364

Barotrauma/BarotraumaShared/Content/Items/Weapons/railgun.xml

@@ -40,7 +40,7 @@
 
     <Sprite texture ="railgunetc.png" depth="0.8" sourcerect="182,0,61,97"/>
     
-    <Controller UserPos="-35.0, -50.0" direction ="Right" canbeselected="true">
+    <Controller UserPos="-35.0, -50.0" direction ="Right" canbeselected="true" requireaimtouse="true">
       <limbposition limb="Head" position="-5,-62"/>
       <limbposition limb="Torso" position="-5,-108"/>
       <limbposition limb="LeftHand" position="43,-85"/>

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

@@ -39,6 +39,12 @@ namespace Barotrauma.Items.Components
             set { userPos = value; }
         }
 
+        [Serialize(false, true)]
+        public bool RequireAimToUse
+        {
+            get; set;
+        }
+
         public Controller(Item item, XElement element)
             : base(item, element)
         {
@@ -160,6 +166,8 @@ namespace Barotrauma.Items.Components
                 return false;
             }
 
+            if (RequireAimToUse && !activator.IsKeyDown(InputType.Aim)) return false;
+
             item.SendSignal(0, "1", "trigger_out", character);
             
             ApplyStatusEffects(ActionType.OnUse, 1.0f, activator);