categorize traits better

OpenRa.Game/Traits/Render/RenderUnitReload.cs

@@ -0,0 +1,27 @@
+using System.Linq;
+
+namespace OpenRa.Traits
+{
+	class RenderUnitReloadInfo : RenderUnitInfo
+	{
+		public override object Create(Actor self) { return new RenderUnitReload(self); }
+	}
+
+	class RenderUnitReload : RenderUnit
+	{
+		public RenderUnitReload(Actor self)
+			: base(self) { }
+
+		public override void Tick(Actor self)
+		{
+			var isAttacking = self.GetCurrentActivity() is Activities.Attack;
+
+			var attack = self.traits.GetOrDefault<AttackBase>();
+
+			if (attack != null)
+				anim.ReplaceAnim((attack.IsReloading() ? "empty-" : "")
+					+ (isAttacking ? "aim" : "idle"));
+			base.Tick(self);
+		}
+	}
+}