use the disabled palette to render husks

closes #4631

OpenRA.Mods.RA/Burns.cs

@@ -32,6 +32,7 @@ namespace OpenRA.Mods.RA
 			Info = info;
 
 			var anim = new Animation("fire", () => 0);
+			anim.IsDecoration = true;
 			anim.PlayRepeating(Info.Anim);
 			self.Trait<RenderSprites>().anims.Add("fire", anim);
 		}

OpenRA.Mods.RA/Husk.cs

@@ -11,6 +11,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using OpenRA.FileFormats;
+using OpenRA.Graphics;
 using OpenRA.Mods.RA.Move;
 using OpenRA.Traits;
 
@@ -25,7 +26,7 @@ namespace OpenRA.Mods.RA
 		public int GetInitialFacing() { return 128; }
 	}
 
-	class Husk : IPositionable, IFacing, ISync, INotifyAddedToWorld, INotifyRemovedFromWorld
+	class Husk : IPositionable, IFacing, ISync, INotifyAddedToWorld, INotifyRemovedFromWorld, IDisable
 	{
 		readonly HuskInfo info;
 		readonly Actor self;
@@ -100,6 +101,11 @@ namespace OpenRA.Mods.RA
 			self.World.ActorMap.RemovePosition(self, this);
 			self.World.ScreenMap.Remove(self);
 		}
+
+		public bool Disabled
+		{
+			get { return true; }
+		}
 	}
 
 	public class HuskSpeedInit : IActorInit<int>

OpenRA.Mods.RA/Modifiers/DisabledOverlay.cs

@@ -0,0 +1,36 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2014 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.FileFormats;
+using OpenRA.Graphics;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA
+{
+	[Desc("Use together with CanPowerDown/RequiresPower on buildings or Husk for vehicles.")]
+	public class DisabledOverlayInfo : TraitInfo<DisabledOverlay> { }
+
+	public class DisabledOverlay : IRenderModifier
+	{
+		public IEnumerable<IRenderable> ModifyRender(Actor self, WorldRenderer wr, IEnumerable<IRenderable> r)
+		{
+			var disabled = self.IsDisabled();
+			foreach (var a in r)
+			{
+				yield return a;
+				if (disabled && !a.IsDecoration)
+					yield return a.WithPalette(wr.Palette("disabled"))
+						.WithZOffset(a.ZOffset + 1)
+						.AsDecoration();
+			}
+		}
+	}
+}

OpenRA.Mods.RA/OpenRA.Mods.RA.csproj

@@ -495,6 +495,7 @@
     <Compile Include="Buildings\Demolishable.cs" />
     <Compile Include="Widgets\Logic\DisconnectWatcherLogic.cs" />
     <Compile Include="Activities\FlyFollow.cs" />
+    <Compile Include="Modifiers\DisabledOverlay.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\OpenRA.FileFormats\OpenRA.FileFormats.csproj">

OpenRA.Mods.RA/Render/RenderBuilding.cs

@@ -33,7 +33,7 @@ namespace OpenRA.Mods.RA.Render
 		}
 	}
 
-	public class RenderBuilding : RenderSimple, INotifyDamageStateChanged, IRenderModifier
+	public class RenderBuilding : RenderSimple, INotifyDamageStateChanged
 	{
 		public RenderBuilding(ActorInitializer init, RenderBuildingInfo info)
 			: this(init, info, () => 0) { }
@@ -54,19 +54,6 @@ namespace OpenRA.Mods.RA.Render
 				self.QueueActivity(new CallFunc(() => Complete(self)));
 		}
 
-		public IEnumerable<IRenderable> ModifyRender(Actor self, WorldRenderer wr, IEnumerable<IRenderable> r)
-		{
-			var disabled = self.IsDisabled();
-			foreach (var a in r)
-			{
-				yield return a;
-				if (disabled && !a.IsDecoration)
-					yield return a.WithPalette(wr.Palette("disabled"))
-						.WithZOffset(a.ZOffset + 1)
-						.AsDecoration();
-			}
-		}
-
 		void Complete(Actor self)
 		{
 			anim.PlayRepeating(NormalizeSequence(self, "idle"));