From a8f7b0e2debf0118aabd69fd862da57dce2b8f8e Mon Sep 17 00:00:00 2001
From: reaperrr <thereaperrr@aol.com>
Date: Wed, 25 Jan 2017 18:46:35 +0100
Subject: [PATCH] Add TargetDamageWarhead

Only deals damage to the actor that was targeted by the carrying
projectile.

Currently only supported by InstantHit projectile.
---
 OpenRA.Mods.Common/OpenRA.Mods.Common.csproj  |  1 +
 .../Warheads/TargetDamageWarhead.cs           | 62 +++++++++++++++++++
 2 files changed, 63 insertions(+)
 create mode 100644 OpenRA.Mods.Common/Warheads/TargetDamageWarhead.cs

diff --git a/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj b/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj
index 770fd27890..6cac6b07e1 100644
--- a/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj
+++ b/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj
@@ -574,6 +574,7 @@
     <Compile Include="Warheads\HealthPercentageDamageWarhead.cs" />
     <Compile Include="Warheads\LeaveSmudgeWarhead.cs" />
     <Compile Include="Warheads\SpreadDamageWarhead.cs" />
+    <Compile Include="Warheads\TargetDamageWarhead.cs" />
     <Compile Include="Warheads\Warhead.cs" />
     <Compile Include="Widgets\ActorPreviewWidget.cs" />
     <Compile Include="Widgets\ColorMixerWidget.cs" />
diff --git a/OpenRA.Mods.Common/Warheads/TargetDamageWarhead.cs b/OpenRA.Mods.Common/Warheads/TargetDamageWarhead.cs
new file mode 100644
index 0000000000..751a261b31
--- /dev/null
+++ b/OpenRA.Mods.Common/Warheads/TargetDamageWarhead.cs
@@ -0,0 +1,62 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2017 The OpenRA Developers (see AUTHORS)
+ * 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 OpenRA.GameRules;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Warheads
+{
+	public class TargetDamageWarhead : DamageWarhead
+	{
+		public override void DoImpact(Target target, Actor firedBy, IEnumerable<int> damageModifiers)
+		{
+			// Damages a single actor, rather than a position. Only support by InstantHit for now.
+			// TODO: Add support for 'area of damage'
+			if (target.Type == TargetType.Actor)
+				DoImpact(target.Actor, firedBy, damageModifiers);
+		}
+
+		public override void DoImpact(WPos pos, Actor firedBy, IEnumerable<int> damageModifiers)
+		{
+			// For now this only displays debug overlay
+			// TODO: Add support for 'area of effect' / multiple targets
+			var world = firedBy.World;
+			var debugOverlayRange = new[] { WDist.Zero, new WDist(128) };
+
+			if (world.LocalPlayer != null)
+			{
+				var devMode = world.LocalPlayer.PlayerActor.TraitOrDefault<DeveloperMode>();
+				if (devMode != null && devMode.ShowCombatGeometry)
+					world.WorldActor.Trait<WarheadDebugOverlay>().AddImpact(pos, debugOverlayRange, DebugOverlayColor);
+			}
+		}
+
+		public override void DoImpact(Actor victim, Actor firedBy, IEnumerable<int> damageModifiers)
+		{
+			if (!IsValidAgainst(victim, firedBy))
+				return;
+
+			var damage = Util.ApplyPercentageModifiers(Damage, damageModifiers.Append(DamageVersus(victim)));
+			victim.InflictDamage(firedBy, new Damage(damage, DamageTypes));
+
+			var world = firedBy.World;
+			if (world.LocalPlayer != null)
+			{
+				var debugOverlayRange = new[] { WDist.Zero, new WDist(128) };
+				var devMode = world.LocalPlayer.PlayerActor.TraitOrDefault<DeveloperMode>();
+				if (devMode != null && devMode.ShowCombatGeometry)
+					world.WorldActor.Trait<WarheadDebugOverlay>().AddImpact(victim.CenterPosition, debugOverlayRange, DebugOverlayColor);
+			}
+		}
+	}
+}