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/CreatesShroud.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.Generic;
+using System.Linq;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	public class CreatesShroudInfo : AffectsShroudInfo
+	{
+		[Desc("Relationship the watching player needs to see the generated shroud.")]
+		public readonly PlayerRelationship ValidRelationships = PlayerRelationship.Neutral | PlayerRelationship.Enemy;
+
+		public override object Create(ActorInitializer init) { return new CreatesShroud(this); }
+	}
+
+	public class CreatesShroud : AffectsShroud
+	{
+		readonly CreatesShroudInfo info;
+		IEnumerable<int> rangeModifiers;
+
+		public CreatesShroud(CreatesShroudInfo info)
+			: base(info)
+		{
+			this.info = info;
+		}
+
+		protected override void Created(Actor self)
+		{
+			base.Created(self);
+
+			rangeModifiers = self.TraitsImplementing<ICreatesShroudModifier>().ToArray().Select(x => x.GetCreatesShroudModifier());
+		}
+
+		protected override void AddCellsToPlayerShroud(Actor self, Player p, PPos[] uv)
+		{
+			if (!info.ValidRelationships.HasRelationship(self.Owner.RelationshipWith(p)))
+				return;
+
+			p.Shroud.AddSource(this, Shroud.SourceType.Shroud, uv);
+		}
+
+		protected override void RemoveCellsFromPlayerShroud(Actor self, Player p) { p.Shroud.RemoveSource(this); }
+
+		public override WDist Range
+		{
+			get
+			{
+				if (CachedTraitDisabled)
+					return WDist.Zero;
+
+				var range = Util.ApplyPercentageModifiers(Info.Range.Length, rangeModifiers);
+				return new WDist(range);
+			}
+		}
+	}
+}