Wrap up Render traits move

OpenRA.Mods.RA/Traits/Render/RenderUnitReload.cs

@@ -0,0 +1,47 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2015 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.Linq;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA.Traits
+{
+	class RenderUnitReloadInfo : RenderUnitInfo, Requires<ArmamentInfo>, Requires<AttackBaseInfo>
+	{
+		[Desc("Armament name")]
+		public readonly string Armament = "primary";
+
+		public override object Create(ActorInitializer init) { return new RenderUnitReload(init.Self, this); }
+	}
+
+	class RenderUnitReload : RenderUnit
+	{
+		readonly AttackBase attack;
+		readonly Armament armament;
+
+		public RenderUnitReload(Actor self, RenderUnitReloadInfo info)
+			: base(self)
+		{
+			attack = self.Trait<AttackBase>();
+			armament = self.TraitsImplementing<Armament>()
+				.Single(a => a.Info.Name == info.Armament);
+		}
+
+		public override void Tick(Actor self)
+		{
+			var sequence = (armament.IsReloading ? "empty-" : "") + (attack.IsAttacking ? "aim" : "idle");
+			if (sequence != DefaultAnimation.CurrentSequence.Name)
+				DefaultAnimation.ReplaceAnim(sequence);
+
+			base.Tick(self);
+		}
+	}
+}