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/ChangesHealth.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.Primitives;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[Desc("Attach this to actors which should regenerate or lose health points over time.")]
+	sealed class ChangesHealthInfo : ConditionalTraitInfo, Requires<IHealthInfo>
+	{
+		[Desc("Absolute amount of health points added in each step.",
+			"Use negative values to apply damage.")]
+		public readonly int Step = 5;
+
+		[Desc("Relative percentages of health added in each step.",
+			"Use negative values to apply damage.",
+			"When both values are defined, their summary will be applied.")]
+		public readonly int PercentageStep = 0;
+
+		[Desc("Time in ticks to wait between each health modification.")]
+		public readonly int Delay = 5;
+
+		[Desc("Heal if current health is below this percentage of full health.")]
+		public readonly int StartIfBelow = 50;
+
+		[Desc("Time in ticks to wait after taking damage.")]
+		public readonly int DamageCooldown = 0;
+
+		[Desc("Apply the health change when encountering these damage types.")]
+		public readonly BitSet<DamageType> DamageTypes = default;
+
+		public override object Create(ActorInitializer init) { return new ChangesHealth(init.Self, this); }
+	}
+
+	sealed class ChangesHealth : ConditionalTrait<ChangesHealthInfo>, ITick, INotifyDamage, ISync
+	{
+		readonly IHealth health;
+
+		[VerifySync]
+		int ticks;
+
+		[VerifySync]
+		int damageTicks;
+
+		public ChangesHealth(Actor self, ChangesHealthInfo info)
+			: base(info)
+		{
+			health = self.Trait<IHealth>();
+		}
+
+		void ITick.Tick(Actor self)
+		{
+			if (self.IsDead || IsTraitDisabled)
+				return;
+
+			// Cast to long to avoid overflow when multiplying by the health
+			if (health.HP >= Info.StartIfBelow * (long)health.MaxHP / 100)
+				return;
+
+			if (damageTicks > 0)
+			{
+				--damageTicks;
+				return;
+			}
+
+			if (--ticks <= 0)
+			{
+				ticks = Info.Delay;
+
+				// Cast to long to avoid overflow when multiplying by the health
+				self.InflictDamage(self, new Damage((int)-(Info.Step + Info.PercentageStep * (long)health.MaxHP / 100), Info.DamageTypes));
+			}
+		}
+
+		void INotifyDamage.Damaged(Actor self, AttackInfo e)
+		{
+			if (e.Damage.Value > 0)
+				damageTicks = Info.DamageCooldown;
+		}
+	}
+}