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/TargetDamageWarhead.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 OpenRA.GameRules;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Warheads
+{
+	[Desc("Apply damage to the targeted actor.")]
+	public class TargetDamageWarhead : DamageWarhead
+	{
+		[Desc("Damage will be applied to actors in this area. A value of zero means only targeted actor will be damaged.")]
+		public readonly WDist Spread = WDist.Zero;
+
+		protected override void DoImpact(WPos pos, Actor firedBy, WarheadArgs args)
+		{
+			if (Spread == WDist.Zero)
+				return;
+
+			var debugVis = firedBy.World.WorldActor.TraitOrDefault<DebugVisualizations>();
+			if (debugVis != null && debugVis.CombatGeometry)
+				firedBy.World.WorldActor.Trait<WarheadDebugOverlay>().AddImpact(pos, [WDist.Zero, Spread], DebugOverlayColor);
+
+			foreach (var victim in firedBy.World.FindActorsOnCircle(pos, Spread))
+			{
+				if (!IsValidAgainst(victim, firedBy))
+					continue;
+
+				HitShape closestActiveShape = null;
+				var closestDistance = int.MaxValue;
+
+				// PERF: Avoid using TraitsImplementing<HitShape> that needs to find the actor in the trait dictionary.
+				foreach (var targetPos in victim.EnabledTargetablePositions)
+				{
+					if (targetPos is HitShape hitshape)
+					{
+						var distance = hitshape.DistanceFromEdge(victim, pos).Length;
+						if (distance < closestDistance)
+						{
+							closestDistance = distance;
+							closestActiveShape = hitshape;
+						}
+					}
+				}
+
+				// Cannot be damaged without an active HitShape.
+				if (closestActiveShape == null)
+					continue;
+
+				// Cannot be damaged if HitShape is outside Spread.
+				if (closestDistance > Spread.Length)
+					continue;
+
+				InflictDamage(victim, firedBy, closestActiveShape, args);
+			}
+		}
+	}
+}