some basic plane behavior on Yak

OpenRa.Game/Traits/Plane.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using OpenRa.Game.Traits.Activities;
+
+namespace OpenRa.Game.Traits
+{
+	class Plane : IOrder
+	{
+		public Plane(Actor self)
+		{
+		}
+
+		public Order IssueOrder(Actor self, int2 xy, MouseInput mi, Actor underCursor)
+		{
+			if (mi.Button == MouseButton.Left) return null;
+			if (underCursor == null)
+				return Order.Move(self, xy);
+			return null;
+		}
+
+		public void ResolveOrder(Actor self, Order order)
+		{
+			if (order.OrderString == "Move")
+			{
+				self.CancelActivity();
+				self.QueueActivity(new Circle(order.TargetLocation));
+			}
+		}
+	}
+}