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/Traits/Buildings/BridgePlaceholder.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 System.Collections.Immutable;
+using OpenRA.Primitives;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[Desc("Placeholder actor used for dead segments and bridge end ramps.")]
+	sealed class BridgePlaceholderInfo : TraitInfo
+	{
+		public readonly string Type = "GroundLevelBridge";
+
+		public readonly DamageState DamageState = DamageState.Undamaged;
+
+		[ActorReference]
+		[Desc("Actor type to replace with on repair.")]
+		public readonly string ReplaceWithActor = null;
+
+		public readonly ImmutableArray<CVec> NeighbourOffsets = [];
+
+		public override object Create(ActorInitializer init) { return new BridgePlaceholder(init.Self, this); }
+	}
+
+	sealed class BridgePlaceholder : IBridgeSegment, INotifyAddedToWorld, INotifyRemovedFromWorld
+	{
+		public readonly BridgePlaceholderInfo Info;
+		readonly Actor self;
+		readonly BridgeLayer bridgeLayer;
+
+		public BridgePlaceholder(Actor self, BridgePlaceholderInfo info)
+		{
+			Info = info;
+			this.self = self;
+			bridgeLayer = self.World.WorldActor.Trait<BridgeLayer>();
+		}
+
+		void INotifyAddedToWorld.AddedToWorld(Actor self)
+		{
+			bridgeLayer.Add(self);
+		}
+
+		void INotifyRemovedFromWorld.RemovedFromWorld(Actor self)
+		{
+			bridgeLayer.Remove(self);
+		}
+
+		void IBridgeSegment.Repair(Actor repairer)
+		{
+			if (Info.ReplaceWithActor == null)
+				return;
+
+			self.World.AddFrameEndTask(w =>
+			{
+				self.Dispose();
+
+				w.CreateActor(Info.ReplaceWithActor,
+				[
+					new LocationInit(self.Location),
+					new OwnerInit(self.Owner),
+				]);
+			});
+		}
+
+		void IBridgeSegment.Demolish(Actor saboteur, BitSet<DamageType> damageTypes)
+		{
+			// Do nothing
+		}
+
+		string IBridgeSegment.Type => Info.Type;
+		DamageState IBridgeSegment.DamageState => Info.DamageState;
+		bool IBridgeSegment.Valid => self.IsInWorld;
+		ImmutableArray<CVec> IBridgeSegment.NeighbourOffsets => Info.NeighbourOffsets;
+		CPos IBridgeSegment.Location => self.Location;
+	}
+}