invuln moved to mod

OpenRa.Mods.RA/IronCurtainable.cs

@@ -0,0 +1,35 @@
+using System.Linq;
+using OpenRa.Effects;
+using OpenRa.Traits;
+using OpenRa.Mods.RA.Effects;
+
+namespace OpenRa.Mods.RA
+{
+	class IronCurtainableInfo : ITraitInfo
+	{
+		public object Create(Actor self) { return new IronCurtainable(); }
+	}
+
+	class IronCurtainable : IDamageModifier, ITick
+	{
+		[Sync]
+		int RemainingTicks = 0;
+
+		public void Tick(Actor self)
+		{
+			if (RemainingTicks > 0)
+				RemainingTicks--;
+		}
+
+		public float GetDamageModifier()
+		{
+			return (RemainingTicks > 0) ? 0.0f : 1.0f;
+		}
+
+		public void Activate(Actor self, int duration)
+		{
+			self.World.AddFrameEndTask(w => w.Add(new InvulnEffect(self)));
+			RemainingTicks = duration;
+		}
+	}
+}