Powered down buildings now display a "powered off" animation

OpenRA.Mods.RA/Effects/PowerdownIndicator.cs

@@ -0,0 +1,44 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2011 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made 
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System.Collections.Generic;
+using OpenRA.Effects;
+using OpenRA.Graphics;
+using OpenRA.Mods.RA.Buildings;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA.Effects
+{
+	class PowerdownIndicator : IEffect
+	{
+		Actor a;
+		Animation anim = new Animation("poweroff");
+
+		public PowerdownIndicator(Actor a)
+		{
+			this.a = a; anim.PlayRepeating("offline");
+		}
+
+		public void Tick(World world)
+		{
+			if (!a.IsInWorld || a.IsDead() || !a.Trait<CanPowerDown>().Disabled)
+				world.AddFrameEndTask(w => w.Remove(this));
+
+			anim.Tick();
+		}
+
+		public IEnumerable<Renderable> Render()
+		{
+			if (!a.Destroyed)
+				yield return new Renderable(anim.Image,
+					a.CenterLocation - .5f * anim.Image.size, "chrome", (int)a.CenterLocation.Y);
+		}
+	}
+}