Pull the make animation crap out of Transforms

OpenRA.Mods.RA/Activities/MakeAnimation.cs

@@ -0,0 +1,56 @@
+#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 OpenRA.FileFormats;
+using OpenRA.Mods.RA.Buildings;
+using OpenRA.Mods.RA.Render;
+using OpenRA.Traits;
+using OpenRA.Traits.Activities;
+
+namespace OpenRA.Mods.RA.Activities
+{
+	class MakeAnimation : CancelableActivity
+	{
+		readonly bool Reversed;
+		readonly RenderBuilding rb;
+		
+		public MakeAnimation(Actor self) : this(self, false) {}
+		public MakeAnimation(Actor self, bool reversed)
+		{
+			Reversed = reversed;
+			rb = self.Trait<RenderBuilding>();
+		}
+		
+		bool complete = false;
+		bool started = false;
+		public override IActivity Tick( Actor self )
+		{
+			if (IsCanceled) return NextActivity;
+			if (!started)
+			{
+				started = true;
+				if (Reversed)
+				{
+					foreach (var s in self.Info.Traits.Get<BuildingInfo>().SellSounds)
+						Sound.PlayToPlayer(self.Owner, s, self.CenterLocation);
+					
+					// PlayCustomAnim is required to stop a frame of the normal state after the anim completes
+					rb.PlayCustomAnimBackwards(self, "make", () => {rb.PlayCustomAnim(self, "make"); complete = true;});
+				}
+				else
+					rb.PlayCustomAnimThen(self, "make", () => complete = true);
+			}
+			return complete ? NextActivity : this;
+		}
+		
+		// Not actually cancellable
+		protected override bool OnCancel( Actor self ) { return false; }
+	}
+}