HasSight -> RevealsShroud and used everywhere

OpenRA.Game/Traits/RevealsShroud.cs

@@ -0,0 +1,38 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
+ * This file is part of OpenRA.
+ * 
+ *  OpenRA is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ * 
+ *  OpenRA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ * 
+ *  You should have received a copy of the GNU General Public License
+ *  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#endregion
+
+namespace OpenRA.Traits
+{
+	class RevealsShroudInfo : TraitInfo<RevealsShroud> { }
+
+	class RevealsShroud : ITick
+	{
+		int2 previousLocation;
+
+		public void Tick(Actor self)
+		{
+			if (!self.IsIdle && previousLocation != self.Location)
+			{
+				previousLocation = self.Location;
+				self.World.WorldActor.traits.Get<Shroud>().UpdateActor(self);
+			}
+		}
+	}
+}