mines are invisible to others

OpenRa.Game/OpenRa.Game.csproj

@@ -181,6 +181,7 @@
     <Compile Include="Traits\Harvester.cs" />
     <Compile Include="Traits\Helicopter.cs" />
     <Compile Include="Traits\Infantry.cs" />
+    <Compile Include="Traits\InvisibleToOthers.cs" />
     <Compile Include="Traits\Minelayer.cs" />
     <Compile Include="Traits\Plane.cs" />
     <Compile Include="Traits\ProductionQueue.cs" />

OpenRa.Game/Traits/InvisibleToOthers.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace OpenRa.Game.Traits
+{
+	class InvisibleToOthers : IRenderModifier
+	{
+		public InvisibleToOthers(Actor self) { }
+
+		public IEnumerable<Renderable> ModifyRender(Actor self, IEnumerable<Renderable> r)
+		{
+			return Game.LocalPlayer == self.Owner
+				? r : new Renderable[] { };
+		}
+	}
+}

OpenRa.Game/Traits/Mobile.cs

@@ -83,7 +83,7 @@ namespace OpenRa.Game.Traits
 				case "Plane":
 					return UnitMovementType.Fly;
 				default:
-					throw new InvalidOperationException("GetMovementType on unit that shouldn't be aable to move.");
+					throw new InvalidOperationException("GetMovementType on unit that shouldn't be able to move.");
 			}
 		}