From 01bd22c34c0fd137cbf5f6f759e13f843c4c5406 Mon Sep 17 00:00:00 2001
From: TDSSS <32099540+TDSSS@users.noreply.github.com>
Date: Fri, 4 Oct 2019 20:46:49 +0200
Subject: [PATCH] Welded vents bursting open (#12481)

---
 code/ATMOSPHERICS/atmospherics.dm                      | 10 +++++-----
 .../ATMOSPHERICS/components/unary_devices/vent_pump.dm |  9 ++++++++-
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/code/ATMOSPHERICS/atmospherics.dm b/code/ATMOSPHERICS/atmospherics.dm
index 7e791e6adda..1d535f5dd9c 100644
--- a/code/ATMOSPHERICS/atmospherics.dm
+++ b/code/ATMOSPHERICS/atmospherics.dm
@@ -197,20 +197,20 @@ GLOBAL_DATUM_INIT(pipe_icon_manager, /datum/pipe_icon_manager, new())
 
 //Called when an atmospherics object is unwrenched while having a large pressure difference
 //with it's locs air contents.
-/obj/machinery/atmospherics/proc/unsafe_pressure_release(var/mob/user,var/pressures)
+/obj/machinery/atmospherics/proc/unsafe_pressure_release(mob/user, pressures)
 	if(!user)
 		return
 
 	if(!pressures)
 		var/datum/gas_mixture/int_air = return_air()
 		var/datum/gas_mixture/env_air = loc.return_air()
-		pressures = int_air.return_pressure()-env_air.return_pressure()
+		pressures = int_air.return_pressure() - env_air.return_pressure()
 
-	var/fuck_you_dir = get_dir(src,user)
-	var/turf/general_direction = get_edge_target_turf(user,fuck_you_dir)
+	var/fuck_you_dir = get_dir(src, user)
+	var/turf/general_direction = get_edge_target_turf(user, fuck_you_dir)
 	user.visible_message("<span class='danger'>[user] is sent flying by pressure!</span>","<span class='userdanger'>The pressure sends you flying!</span>")
 	//Values based on 2*ONE_ATMOS (the unsafe pressure), resulting in 20 range and 4 speed
-	user.throw_at(general_direction,pressures/10,pressures/50)
+	user.throw_at(general_direction, pressures/10, pressures/50)
 
 /obj/machinery/atmospherics/deconstruct(disassembled = TRUE)
 	if(can_deconstruct)
diff --git a/code/ATMOSPHERICS/components/unary_devices/vent_pump.dm b/code/ATMOSPHERICS/components/unary_devices/vent_pump.dm
index 736137e7b55..60e0448dfbd 100644
--- a/code/ATMOSPHERICS/components/unary_devices/vent_pump.dm
+++ b/code/ATMOSPHERICS/components/unary_devices/vent_pump.dm
@@ -38,6 +38,7 @@
 	var/pressure_checks_default = PRESSURE_CHECKS
 
 	var/welded = 0 // Added for aliens -- TLE
+	var/weld_burst_pressure = 50 * ONE_ATMOSPHERE	//the (internal) pressure at which welded covers will burst off
 
 	var/frequency = ATMOS_VENTSCRUB
 	var/datum/radio_frequency/radio_connection
@@ -78,7 +79,7 @@
 	..()
 	air_contents.volume = 1000
 
-/obj/machinery/atmospherics/unary/vent_pump/update_icon(var/safety = 0)
+/obj/machinery/atmospherics/unary/vent_pump/update_icon(safety = 0)
 	..()
 
 	plane = FLOOR_PLANE
@@ -137,6 +138,12 @@
 		return 0
 
 	if(welded)
+		if(air_contents.return_pressure() >= weld_burst_pressure && prob(5))	//the weld is on but the cover is welded shut, can it withstand the internal pressure?
+			visible_message("<span class='danger'>The welded cover of [src] bursts open!</span>")
+			for(var/mob/M in range(1, src))
+				unsafe_pressure_release(M, air_contents.return_pressure())	//let's send everyone flying
+			welded = FALSE
+			update_icon()
 		return 0
 
 	var/datum/gas_mixture/environment = loc.return_air()