Fix FrozenUnderFog.

OpenRA.Mods.RA/Effects/FrozenActorProxy.cs

@@ -0,0 +1,53 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2013 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 System.Linq;
+using OpenRA.Effects;
+using OpenRA.Graphics;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA.Effects
+{
+	public class FrozenActorProxy : IEffect
+	{
+		readonly Actor self;
+		readonly IEnumerable<CPos> footprint;
+		IRenderable[] renderables;
+
+		public FrozenActorProxy(Actor self, IEnumerable<CPos> footprint)
+		{
+			this.self = self;
+			this.footprint = footprint;
+		}
+
+		public void Tick(World world) { }
+		public void SetRenderables(IEnumerable<IRenderable> r)
+		{
+			renderables = r.Select(rr => rr).ToArray();
+		}
+
+		public IEnumerable<IRenderable> Render(WorldRenderer wr)
+		{
+			if (renderables == null)
+				return SpriteRenderable.None;
+
+			if (footprint.Any(c => !wr.world.FogObscures(c)))
+			{
+				if (self.Destroyed)
+					self.World.AddFrameEndTask(w => w.Remove(this));
+
+				return SpriteRenderable.None;
+			}
+
+			return renderables;
+		}
+	}
+}