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/TakeOff.cs

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+#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 OpenRA.Activities;
+using OpenRA.Mods.Common.Traits;
+
+namespace OpenRA.Mods.Common.Activities
+{
+	public class TakeOff : Activity
+	{
+		readonly Aircraft aircraft;
+
+		public TakeOff(Actor self)
+		{
+			aircraft = self.Trait<Aircraft>();
+		}
+
+		protected override void OnFirstRun(Actor self)
+		{
+			if (aircraft.ForceLanding)
+				return;
+
+			if (!aircraft.HasInfluence())
+				return;
+
+			// We are taking off, so remove influence in ground cells.
+			aircraft.RemoveInfluence();
+
+			if (self.World.Map.DistanceAboveTerrain(aircraft.CenterPosition).Length > aircraft.Info.MinAirborneAltitude)
+				return;
+
+			if (aircraft.Info.TakeoffSounds.Length > 0)
+				Game.Sound.Play(SoundType.World, aircraft.Info.TakeoffSounds, self.World, aircraft.CenterPosition);
+
+			foreach (var notify in self.TraitsImplementing<INotifyTakeOff>())
+				notify.TakeOff(self);
+		}
+
+		public override bool Tick(Actor self)
+		{
+			// Refuse to take off if it would land immediately again.
+			if (aircraft.ForceLanding)
+			{
+				Cancel(self);
+				return true;
+			}
+
+			var dat = self.World.Map.DistanceAboveTerrain(aircraft.CenterPosition);
+			if (dat < aircraft.Info.CruiseAltitude)
+			{
+				// If we're a VTOL, rise before flying forward
+				if (aircraft.Info.VTOL)
+				{
+					Fly.VerticalTakeOffOrLandTick(self, aircraft, aircraft.Facing, aircraft.Info.CruiseAltitude);
+					return false;
+				}
+
+				Fly.FlyTick(self, aircraft, aircraft.Facing, aircraft.Info.CruiseAltitude);
+				return false;
+			}
+
+			return true;
+		}
+	}
+}