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/DeliverUnit.cs

@@ -0,0 +1,112 @@
+#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.Collections.Generic;
+using OpenRA.Activities;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Primitives;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Activities
+{
+	public class DeliverUnit : Activity
+	{
+		readonly Carryall carryall;
+		readonly bool assignTargetOnFirstRun;
+		readonly WDist deliverRange;
+		readonly Color? targetLineColor;
+
+		Target destination;
+
+		public DeliverUnit(Actor self, WDist deliverRange, Color? targetLineColor)
+			: this(self, Target.Invalid, deliverRange, targetLineColor)
+		{
+			assignTargetOnFirstRun = true;
+		}
+
+		public DeliverUnit(Actor self, in Target destination, WDist deliverRange, Color? targetLineColor)
+		{
+			this.destination = destination;
+			this.deliverRange = deliverRange;
+			this.targetLineColor = targetLineColor;
+
+			carryall = self.Trait<Carryall>();
+		}
+
+		protected override void OnFirstRun(Actor self)
+		{
+			// In case this activity was queued (either via queued order of via AutoCarryall)
+			// something might have happened to the cargo in the time between the activity being
+			// queued and being run, so short out if it is no longer valid.
+			if (carryall.Carryable == null || carryall.State != Carryall.CarryallState.Carrying)
+				return;
+
+			if (assignTargetOnFirstRun)
+				destination = Target.FromCell(self.World, self.Location);
+
+			QueueChild(new Land(self, destination, deliverRange));
+			QueueChild(new Wait(carryall.Info.BeforeUnloadDelay, false));
+			QueueChild(new ReleaseUnit(self));
+			QueueChild(new TakeOff(self));
+		}
+
+		public override IEnumerable<TargetLineNode> TargetLineNodes(Actor self)
+		{
+			if (targetLineColor != null)
+				yield return new TargetLineNode(destination, targetLineColor.Value);
+		}
+
+		sealed class ReleaseUnit : Activity
+		{
+			readonly Carryall carryall;
+			readonly BodyOrientation body;
+			readonly IFacing facing;
+
+			public ReleaseUnit(Actor self)
+			{
+				facing = self.Trait<IFacing>();
+				carryall = self.Trait<Carryall>();
+				body = self.Trait<BodyOrientation>();
+			}
+
+			protected override void OnFirstRun(Actor self)
+			{
+				// HACK: Activities still tick between the actor being killed and being disposed
+				// Thus the carryable might have changed since queuing because the death handler set it to null
+				if (carryall.Carryable == null)
+					return;
+
+				var localOffset = carryall.CarryableOffset.Rotate(body.QuantizeOrientation(self.Orientation));
+				var targetPosition = self.CenterPosition + body.LocalToWorld(localOffset);
+				var targetLocation = self.World.Map.CellContaining(targetPosition);
+				carryall.Carryable.Trait<IPositionable>().SetPosition(carryall.Carryable, targetLocation, SubCell.FullCell);
+				carryall.Carryable.Trait<IFacing>().Facing = facing.Facing;
+
+				// Put back into world
+				self.World.AddFrameEndTask(w =>
+				{
+					if (self.IsDead)
+						return;
+
+					var cargo = carryall.Carryable;
+					if (cargo == null)
+						return;
+
+					var carryable = cargo.Trait<Carryable>();
+					w.Add(cargo);
+					carryall.DetachCarryable(self);
+					carryable.UnReserve(cargo);
+					carryable.Detached(cargo);
+				});
+			}
+		}
+	}
+}