bib is removed from smudge on building death

OpenRa.Game/Traits/RenderBuilding.cs

@@ -10,7 +10,7 @@ using OpenRa.Game;
 
 namespace OpenRa.Game.Traits
 {
-	class RenderBuilding : RenderSimple
+	class RenderBuilding : RenderSimple, INotifyRemoved
 	{
 		const int SmallBibStart = 1;
 		const int LargeBibStart = 5;
@@ -19,7 +19,11 @@ namespace OpenRa.Game.Traits
 			: base(self)
 		{
 			anim.PlayThen("make", () => anim.PlayRepeating("idle"));
+			DoBib(self, false);
+		}
 
+		void DoBib(Actor self, bool isRemove)
+		{
 			// at this point, we already know where we are, so we can safely place the bib in the smudge
 			var buildingInfo = (UnitInfo.BuildingInfo)self.unitInfo;
 			if (buildingInfo.Bib)
@@ -31,7 +35,13 @@ namespace OpenRa.Game.Traits
 				for (int i = 0; i < 2 * size; i++)
 				{
 					var p = self.Location + new int2(i % size, i / size + bibOffset);
-					Game.map.MapTiles[p.X, p.Y].smudge = (byte)(i + startIndex);
+					if (isRemove)
+					{
+						if (Game.map.MapTiles[p.X, p.Y].smudge == (byte)(i + startIndex))
+							Game.map.MapTiles[p.X, p.Y].smudge = 0;
+					}
+					else
+						Game.map.MapTiles[p.X, p.Y].smudge = (byte)(i + startIndex);
 				}
 			}
 		}
@@ -40,5 +50,7 @@ namespace OpenRa.Game.Traits
 		{
 			yield return Pair.New(anim.Image, 24f * (float2)self.Location);
 		}
+
+		public void Removed(Actor self) { DoBib(self, true); }
 	}
 }

OpenRa.Game/Traits/TraitsInterfaces.cs

@@ -10,4 +10,5 @@ namespace OpenRa.Game.Traits
 	interface ITick { void Tick(Actor self); }
 	interface IRender { IEnumerable<Pair<Sprite, float2>> Render(Actor self); }
 	interface IOrder { Order Order(Actor self, int2 xy, bool lmb, Actor underCursor); }
+	interface INotifyRemoved { void Removed(Actor self); }
 }

OpenRa.Game/World.cs

@@ -1,7 +1,8 @@
 using System;
 using System.Collections.Generic;
 using System.Windows.Forms;
-using OpenRa.Game.Graphics;
+using OpenRa.Game.Graphics;
+using OpenRa.Game.Traits;
 
 namespace OpenRa.Game
 {
@@ -21,8 +22,13 @@ namespace OpenRa.Game
 
 		public void AddFrameEndTask( Action<World> a ) { frameEndActions.Add( a ); }
 
-		public event Action<Actor> ActorAdded = _ => { };
-		public event Action<Actor> ActorRemoved = a => { a.Health = 0; };		/* make sure everyone sees it as dead */
+		public event Action<Actor> ActorAdded = _ => { };
+		public event Action<Actor> ActorRemoved = a =>
+		{
+			a.Health = 0;		/* make sure everyone sees it as dead */
+			foreach (var nr in a.traits.WithInterface<INotifyRemoved>())
+				nr.Removed(a);
+		};
 
 		public void ResetTimer()
 		{