more of attack-ground (order wiring, etc); doesn't work.

OpenRA.Game/Traits/Activities/Move.cs

@@ -70,6 +70,16 @@ namespace OpenRA.Traits.Activities
 			this.nearEnough = range;
 		}
 
+		public Move(Target target, int range)
+			: this()
+		{
+			this.getPath = self => self.World.PathFinder.FindUnitPathToRange(
+				self.Location, Util.CellContaining(target.CenterLocation),
+				range, self);
+			this.destination = null;
+			this.nearEnough = range;
+		}
+
 		public Move(Func<List<int2>> getPath)
 			: this()
 		{

OpenRA.Game/Traits/TraitsInterfaces.cs

@@ -165,6 +165,9 @@ namespace OpenRA.Traits
 
 		public static Target FromActor(Actor a) { return new Target { actor = a, valid = true }; }
 		public static Target FromPos(float2 p) { return new Target { pos = p, valid = true }; }
+		public static Target FromOrder(Order o) { return o.TargetActor != null ? Target.FromActor(o.TargetActor) : Target.FromPos(o.TargetLocation); }
+
+		public static readonly Target None = new Target();
 
 		public bool IsValid { get { return valid && (actor == null || actor.IsInWorld); } }
 		public float2 CenterLocation { get { return actor != null ? actor.CenterLocation : pos; } }