Move RA World traits, FrozenUnderFog Modifier and various other traits into Traits

OpenRA.Mods.RA/Traits/TargetableUnit.cs

@@ -0,0 +1,56 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System.Collections.Generic;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA.Traits
+{
+	[Desc("Actor can be targeted.")]
+	public class TargetableUnitInfo : ITraitInfo, ITargetableInfo
+	{
+		[Desc("Target type. Used for filtering (in)valid targets.")]
+		public readonly string[] TargetTypes = { };
+		public string[] GetTargetTypes() { return TargetTypes; }
+
+		public bool RequiresForceFire = false;
+
+		public virtual object Create(ActorInitializer init) { return new TargetableUnit(init.self, this); }
+	}
+
+	public class TargetableUnit : ITargetable
+	{
+		readonly TargetableUnitInfo info;
+		protected Cloak cloak;
+
+		public TargetableUnit(Actor self, TargetableUnitInfo info)
+		{
+			this.info = info;
+			cloak = self.TraitOrDefault<Cloak>();
+		}
+
+		public virtual bool TargetableBy(Actor self, Actor viewer)
+		{
+			if (cloak == null || !cloak.Cloaked)
+				return true;
+
+			return cloak.IsVisible(self, viewer.Owner);
+		}
+
+		public virtual string[] TargetTypes { get { return info.TargetTypes; } }
+
+		public virtual IEnumerable<WPos> TargetablePositions(Actor self)
+		{
+			yield return self.CenterPosition;
+		}
+
+		public bool RequiresForceFire { get { return info.RequiresForceFire; } }
+	}
+}