spyplane works

OpenRa.Game/Traits/Activities/RemoveSelf.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace OpenRa.Traits.Activities
+{
+	class RemoveSelf : IActivity
+	{
+		bool isCanceled;
+		public IActivity NextActivity { get; set; }
+
+		public IActivity Tick(Actor self)
+		{
+			if (isCanceled) return NextActivity;
+			self.World.AddFrameEndTask(w => w.Remove(self));
+			return null;
+		}
+
+		public void Cancel(Actor self) { isCanceled = true; NextActivity = null; }
+	}
+}