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/Power/ScalePowerWithHealth.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.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[Desc("Scale power amount with the current health.")]
+	public class ScalePowerWithHealthInfo : TraitInfo, Requires<PowerInfo>, Requires<IHealthInfo>
+	{
+		public override object Create(ActorInitializer init) { return new ScalePowerWithHealth(init.Self); }
+	}
+
+	public class ScalePowerWithHealth : IPowerModifier, INotifyDamage, INotifyOwnerChanged
+	{
+		readonly IHealth health;
+		PowerManager power;
+
+		public ScalePowerWithHealth(Actor self)
+		{
+			power = self.Owner.PlayerActor.Trait<PowerManager>();
+			health = self.Trait<IHealth>();
+		}
+
+		int IPowerModifier.GetPowerModifier()
+		{
+			// Cast to long to avoid overflow when multiplying by the health
+			return (int)(100L * health.HP / health.MaxHP);
+		}
+
+		void INotifyDamage.Damaged(Actor self, AttackInfo e) { power.UpdateActor(self); }
+
+		void INotifyOwnerChanged.OnOwnerChanged(Actor self, Player oldOwner, Player newOwner)
+		{
+			power = newOwner.PlayerActor.Trait<PowerManager>();
+		}
+	}
+}