moved air unit support to ra

OpenRA.Mods.RA/Activities/FlyAttack.cs

@@ -0,0 +1,71 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
+ * This file is part of OpenRA.
+ * 
+ *  OpenRA is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ * 
+ *  OpenRA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ * 
+ *  You should have received a copy of the GNU General Public License
+ *  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#endregion
+
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA.Activities
+{
+	public class FlyAttack : IActivity
+	{
+		public IActivity NextActivity { get; set; }
+		Actor Target;
+
+		public FlyAttack(Actor target) { Target = target; }
+
+		public IActivity Tick(Actor self)
+		{
+			if (Target == null || Target.IsDead) 
+				return NextActivity;
+
+			var limitedAmmo = self.traits.GetOrDefault<LimitedAmmo>();
+			if (limitedAmmo != null && !limitedAmmo.HasAmmo())
+				return NextActivity;
+
+			return Util.SequenceActivities(
+				new Fly(Target.CenterLocation),
+				new FlyTimed(50),
+				this);
+		}
+
+		public void Cancel(Actor self) { Target = null; NextActivity = null; }
+	}
+
+	public class FlyCircle : IActivity
+	{
+		public IActivity NextActivity { get; set; }
+		int2 Target;
+		bool isCanceled;
+
+		public FlyCircle(int2 target) { Target = target; }
+
+		public IActivity Tick(Actor self)
+		{
+			if (isCanceled)
+				return NextActivity;
+
+			return Util.SequenceActivities(
+				new Fly(Util.CenterOfCell(Target)),
+				new FlyTimed(50),
+				this);
+		}
+
+		public void Cancel(Actor self) { isCanceled = true; NextActivity = null; }
+	}
+}