moved AutoTarget/AutoHeal to ra

OpenRA.Mods.RA/AutoTarget.cs

@@ -0,0 +1,90 @@
+#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 System.Linq;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA
+{
+	class AutoTargetInfo : TraitInfo<AutoTarget>
+	{
+		public readonly float ScanTimeAverage = 2f;
+		public readonly float ScanTimeSpread = .5f;
+	}
+
+	class AutoTarget : ITick, INotifyDamage
+	{
+		[Sync]
+		int nextScanTime = 0;
+
+		void AttackTarget(Actor self, Actor target)
+		{
+			var attack = self.traits.Get<AttackBase>();
+			if (target != null)
+				attack.ResolveOrder(self, new Order("Attack", self, target));
+		}
+
+		public void Tick(Actor self)
+		{
+			if (!self.IsIdle) return;
+
+			if (--nextScanTime <= 0)
+			{
+				var attack = self.traits.Get<AttackBase>();
+				var range = Util.GetMaximumRange(self);
+
+				if (attack.target == null ||
+					(attack.target.Location - self.Location).LengthSquared > range * range)
+					AttackTarget(self, ChooseTarget(self, range));
+
+				var info = self.Info.Traits.Get<AutoTargetInfo>();
+				nextScanTime = (int)(25 * (info.ScanTimeAverage + 
+					(self.World.SharedRandom.NextDouble() * 2 - 1) * info.ScanTimeSpread));
+			}
+		}
+
+		Actor ChooseTarget(Actor self, float range)
+		{
+			var inRange = self.World.FindUnitsInCircle(self.CenterLocation, Game.CellSize * range);
+
+			return inRange
+				.Where(a => a.Owner != null && self.Owner.Stances[ a.Owner ] == Stance.Enemy)
+				.Where(a => Combat.HasAnyValidWeapons(self, a))
+				.Where(a => !a.traits.Contains<Cloak>() || !a.traits.Get<Cloak>().Cloaked)
+				.OrderBy(a => (a.Location - self.Location).LengthSquared)
+				.FirstOrDefault();
+		}
+
+		public void Damaged(Actor self, AttackInfo e)
+		{
+			if (!self.IsIdle) return;
+
+			// not a lot we can do about things we can't hurt... although maybe we should automatically run away?
+			if (!Combat.HasAnyValidWeapons(self, e.Attacker)) return;
+
+			// don't retaliate against own units force-firing on us. it's usually not what the player wanted.
+			if (self.Owner.Stances[e.Attacker.Owner] == Stance.Ally) return;
+
+			if (e.Damage < 0) return;	// don't retaliate against healers
+
+			AttackTarget(self, e.Attacker);
+		}
+	}
+}