start of demolition support

OpenRa.Game/Traits/Activities/Demolish.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace OpenRa.Game.Traits.Activities
+{
+	class Demolish : IActivity
+	{
+		Actor target;
+		public IActivity NextActivity { get; set; }
+
+		public Demolish( Actor target )
+		{
+			this.target = target;
+		}
+
+		public IActivity Tick(Actor self)
+		{
+			if (target == null || target.IsDead) return NextActivity;
+
+			// 1. run to adj tile
+			// 2. spawn timed demolition (for +3/4s)
+			// 3. run away --- where?
+			return this;
+		}
+
+		public void Cancel(Actor self) { target = null; NextActivity = null; }
+	}
+}