From bb3f4e69ba0b2e545c01d1092f4b40a5bc4d92b5 Mon Sep 17 00:00:00 2001
From: Crosarius <30341877+Crosarius@users.noreply.github.com>
Date: Sun, 30 Jun 2024 06:45:26 +1000
Subject: [PATCH] Helmet Headbutt Protection (#19531)

This makes headbutting correctly check for the head armour, to determine
whether it's possible to knock someone unconscious.

Head armour will now prevent you from being knocked unconscious by a
headbutt, unless the attacker has more head armour than you. (e.g.
breacher hardsuit vs corporate helmet)

You can also knock yourself unconscious by headbutting someone with more
head armour than you.
---
 code/modules/mob/mob_grab_specials.dm         | 11 ++++++-----
 html/changelogs/crosarius-headbutthelmets.yml |  7 +++++++
 2 files changed, 13 insertions(+), 5 deletions(-)
 create mode 100644 html/changelogs/crosarius-headbutthelmets.yml

diff --git a/code/modules/mob/mob_grab_specials.dm b/code/modules/mob/mob_grab_specials.dm
index f42f200fb4a..3b950c3cf32 100644
--- a/code/modules/mob/mob_grab_specials.dm
+++ b/code/modules/mob/mob_grab_specials.dm
@@ -100,16 +100,17 @@
 	if(isunathi(attacker))
 		damage += 5
 
-	var/obj/item/clothing/hat = attacker.head
-	if(istype(hat))
-		damage += hat.force * 3
-
 	target.apply_damage(damage, DAMAGE_BRUTE, BP_HEAD)
 	attacker.apply_damage(10, DAMAGE_BRUTE, BP_HEAD)
 
-	if(armor < 25 && target.headcheck(BP_HEAD) && prob(damage))
+	var/targetarmor = 100 * target.get_blocked_ratio(BP_HEAD, DAMAGE_BRUTE, damage = damage)
+	var/attackerarmor = 100 * attacker.get_blocked_ratio(BP_HEAD, DAMAGE_BRUTE, damage = damage)
+	if((targetarmor < 25 || targetarmor < attackerarmor) && target.headcheck(BP_HEAD) && prob(damage))
 		target.apply_effect(20, PARALYZE)
 		target.visible_message(SPAN_DANGER("[target] [target.species.knockout_message]"))
+	if(attackerarmor < targetarmor && attacker.headcheck(BP_HEAD) && prob(damage))
+		attacker.apply_effect(20, PARALYZE)
+		attacker.visible_message(SPAN_DANGER("[attacker] [attacker.species.knockout_message]"))
 
 	playsound(attacker.loc, /singleton/sound_category/swing_hit_sound, 25, 1, -1)
 	attacker.attack_log += text("\[[time_stamp()]\] <span class='warning'>Headbutted [target.name] ([target.ckey])</span>")
diff --git a/html/changelogs/crosarius-headbutthelmets.yml b/html/changelogs/crosarius-headbutthelmets.yml
new file mode 100644
index 00000000000..632227ee2af
--- /dev/null
+++ b/html/changelogs/crosarius-headbutthelmets.yml
@@ -0,0 +1,7 @@
+author: Crosarius
+
+delete-after: True
+
+changes:
+  - qol: "Helmets now protect against being knocked unconscious by a headbutt, unless the person headbutting has a better helmet."
+  - qol: "Headbutting someone who is wearing a helmet can knock yourself out, instead of them."