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/Warheads/GrantExternalConditionWarhead.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.Linq;
+using OpenRA.GameRules;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Warheads
+{
+	[Desc("Grant an external condition to hit actors.")]
+	public class GrantExternalConditionWarhead : Warhead
+	{
+		[FieldLoader.Require]
+		[Desc("The condition to apply. Must be included in the target actor's ExternalConditions list.")]
+		public readonly string Condition = null;
+
+		[Desc("Duration of the condition (in ticks). Set to 0 for a permanent condition.")]
+		public readonly int Duration = 0;
+
+		public readonly WDist Range = WDist.FromCells(1);
+
+		public override void DoImpact(in Target target, WarheadArgs args)
+		{
+			var firedBy = args.SourceActor;
+
+			if (target.Type == TargetType.Invalid)
+				return;
+
+			var actors = target.Type == TargetType.Actor ? [target.Actor] :
+				firedBy.World.FindActorsInCircle(target.CenterPosition, Range);
+
+			foreach (var a in actors)
+			{
+				if (!IsValidAgainst(a, firedBy))
+					continue;
+
+				a.TraitsImplementing<ExternalCondition>()
+					.FirstOrDefault(t => t.Info.Condition == Condition && t.CanGrantCondition(firedBy))
+					?.GrantCondition(a, firedBy, Duration);
+			}
+		}
+	}
+}