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/Demolishable.cs

@@ -0,0 +1,100 @@
+#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.Primitives;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[Desc("Handle demolitions from C4 explosives.")]
+	public class DemolishableInfo : ConditionalTraitInfo, IDemolishableInfo
+	{
+		public bool IsValidTarget(ActorInfo actorInfo, Actor saboteur) { return true; }
+
+		[GrantedConditionReference]
+		[Desc("Condition to grant during demolition countdown.")]
+		public readonly string Condition = null;
+
+		public override object Create(ActorInitializer init) { return new Demolishable(this); }
+	}
+
+	public class Demolishable : ConditionalTrait<DemolishableInfo>, IDemolishable, ITick, INotifyOwnerChanged
+	{
+		sealed class DemolishAction(Actor saboteur, int delay, int token, BitSet<DamageType> damageTypes)
+		{
+			public readonly Actor Saboteur = saboteur;
+			public readonly int Token = token;
+			public int Delay = delay;
+			public readonly BitSet<DamageType> DamageTypes = damageTypes;
+		}
+
+		readonly List<DemolishAction> actions = [];
+		readonly List<DemolishAction> removeActions = [];
+		IDamageModifier[] damageModifiers;
+
+		public Demolishable(DemolishableInfo info)
+			: base(info) { }
+
+		protected override void Created(Actor self)
+		{
+			damageModifiers = self.TraitsImplementing<IDamageModifier>()
+				.Concat(self.Owner.PlayerActor.TraitsImplementing<IDamageModifier>()).ToArray();
+		}
+
+		void INotifyOwnerChanged.OnOwnerChanged(Actor self, Player oldOwner, Player newOwner)
+		{
+			damageModifiers = self.TraitsImplementing<IDamageModifier>()
+				.Concat(newOwner.PlayerActor.TraitsImplementing<IDamageModifier>()).ToArray();
+		}
+
+		bool IDemolishable.IsValidTarget(Actor self, Actor saboteur)
+		{
+			return !IsTraitDisabled;
+		}
+
+		void IDemolishable.Demolish(Actor self, Actor saboteur, int delay, BitSet<DamageType> damageTypes)
+		{
+			if (IsTraitDisabled)
+				return;
+
+			var token = self.GrantCondition(Info.Condition);
+			actions.Add(new DemolishAction(saboteur, delay, token, damageTypes));
+		}
+
+		void ITick.Tick(Actor self)
+		{
+			if (IsTraitDisabled || actions.Count == 0)
+				return;
+
+			foreach (var a in actions)
+			{
+				if (a.Delay-- <= 0)
+				{
+					if (Util.ApplyPercentageModifiers(100, damageModifiers.Select(t => t.GetDamageModifier(self, null))) > 0)
+						self.Kill(a.Saboteur, a.DamageTypes);
+					else if (a.Token != Actor.InvalidConditionToken)
+					{
+						self.RevokeCondition(a.Token);
+						removeActions.Add(a);
+					}
+				}
+			}
+
+			// Remove expired actions to avoid double-revoking
+			foreach (var a in removeActions)
+				actions.Remove(a);
+
+			removeActions.Clear();
+		}
+	}
+}