Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

OpenRA.Mods.Common/Activities/Air/FlyIdle.cs

@@ -0,0 +1,66 @@
+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * 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, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System.Linq;
+using OpenRA.Activities;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Activities
+{
+	public class FlyIdle : Activity
+	{
+		readonly Aircraft aircraft;
+		readonly INotifyIdle[] tickIdles;
+		readonly bool idleTurn;
+		int remainingTicks;
+		readonly bool isIdleTurner;
+
+		public FlyIdle(Actor self, int ticks = -1, bool idleTurn = true)
+		{
+			aircraft = self.Trait<Aircraft>();
+			isIdleTurner = aircraft.Info.IdleSpeed > 0 || (!aircraft.Info.CanHover && aircraft.Info.IdleSpeed < 0);
+			remainingTicks = ticks;
+			this.idleTurn = idleTurn;
+
+			if (idleTurn)
+				tickIdles = self.TraitsImplementing<INotifyIdle>().ToArray();
+		}
+
+		public override bool Tick(Actor self)
+		{
+			if (remainingTicks == 0 || (NextActivity != null && remainingTicks < 0))
+				return true;
+
+			if (aircraft.ForceLanding || IsCanceling)
+				return true;
+
+			if (remainingTicks > 0)
+				remainingTicks--;
+
+			if (tickIdles != null)
+				foreach (var tickIdle in tickIdles)
+					tickIdle.TickIdle(self);
+
+			if (isIdleTurner)
+			{
+				// This override is necessary, otherwise aircraft with CanSlide would circle sideways
+				var move = aircraft.FlyStep(aircraft.IdleMovementSpeed, aircraft.Facing);
+
+				// We can't possibly turn this fast
+				var desiredFacing = aircraft.Facing + new WAngle(256);
+				Fly.FlyTick(self, aircraft, desiredFacing, aircraft.Info.CruiseAltitude, move, idleTurn);
+			}
+
+			return false;
+		}
+	}
+}