Refinements to Violet Protocol (Citadel-Station-13#5933)

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## About The Pull Request

1. **Tweaks/Nerfs Chlorine Gas.**
2. **Tweaks Virology Atmospherics Layout.**

## Why It's Good For The Game

1. _The gas was a little **too** good at killing everyone._
2. _Makes the scrubber loop a little more secure and puts it on a fresh
network, thanks to Kevin._

## Changelog

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:cl:
tweak: Tweaks Chlorine gas.
tweak: Adjusts Virology layout and scrubber net.
/:cl:

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code/__DEFINES/atmospherics/machinery/scrubber.dm

@@ -1,5 +1,6 @@
 //* Scrubber default enums - these must be on SSair!
 #define SCRUBBER_DEFAULT_STATION "station"
+#define SCRUBBER_DEFAULT_ATLAS_VIROLOGY "atlasviro"
 
 /// max ids scrubbers can scrub at once
 #define SCRUBBER_MAX_GAS_IDS 10

code/controllers/subsystem/air.dm

@@ -22,6 +22,7 @@ SUBSYSTEM_DEF(air)
 	/// scrubber defaults
 	var/list/scrubber_defaults = list(
 		SCRUBBER_DEFAULT_STATION = list(/datum/gas/carbon_dioxide, /datum/gas/phoron),
+		SCRUBBER_DEFAULT_ATLAS_VIROLOGY = list(/datum/gas/carbon_dioxide, /datum/gas/phoron, /datum/gas/chlorine),
 	)
 
 	var/cost_turfs = 0

code/modules/atmospherics/gasmixtures/gas_types_hardcoded.dm

@@ -142,10 +142,9 @@
 	visual_overlay = "chlorine"
 	visual_threshold = 1
 
-	gas_reagent_id = "sacid"
-	gas_reagent_amount = 10
-	gas_reagent_threshold = 5
-
+	gas_reagent_id = "chlorinegas"
+	gas_reagent_amount = 1
+	gas_reagent_threshold = 0.5
 
 /datum/gas/sulfur_dioxide
 	id = GAS_ID_SULFUR_DIOXIDE

code/modules/reagents/chemistry/reagents/Chemistry-Reagents-Toxins.dm

@@ -474,6 +474,17 @@
 	power = 2
 	meltdose = 30
 
+//Solid Chlorine is alkaline, but gaseous Chlorine is acidic.
+/datum/reagent/acid/chlorine_gas
+	name = "Chlorine gas"
+	id = "chlorinegas"
+	description = "A pungent yellow-green acidic gas."
+	taste_description = "bleach"
+	reagent_state = REAGENT_GAS
+	color = "#c5f72d"
+	power = 5
+	meltdose = 10
+
 /datum/reagent/thermite/venom
 	name = "Pyrotoxin"
 	id = "thermite_v"

maps/rift/levels/rift-04-surface1.dmm

@@ -1454,9 +1454,8 @@
 /obj/machinery/light{
 	dir = 1
 	},
-/obj/machinery/atmospherics/component/unary/vent_scrubber/on{
-	dir = 4;
-	power_rating = 45000
+/obj/machinery/atmospherics/component/unary/vent_pump/high_volume{
+	dir = 1
 	},
 /turf/simulated/floor/tiled,
 /area/medical/virologypurge)
@@ -7691,6 +7690,16 @@
 /obj/structure/fitness/weightlifter,
 /turf/simulated/floor/plating,
 /area/maintenance/research/lower)
+"eXs" = (
+/obj/structure/cable/green{
+	icon_state = "1-2"
+	},
+/obj/machinery/atmospherics/pipe/simple/hidden/scrubbers,
+/obj/machinery/atmospherics/pipe/simple/hidden/supply{
+	dir = 9
+	},
+/turf/simulated/floor/tiled/white,
+/area/medical/virologyisolation)
 "eXK" = (
 /obj/effect/debris/cleanable/liquid_fuel,
 /turf/simulated/floor/plating,
@@ -14293,14 +14302,6 @@
 	},
 /turf/simulated/floor/plating,
 /area/maintenance/substation/surface_one)
-"jak" = (
-/obj/machinery/atmospherics/pipe/simple/hidden/supply,
-/obj/machinery/atmospherics/pipe/simple/hidden/scrubbers,
-/obj/structure/cable/green{
-	icon_state = "1-2"
-	},
-/turf/simulated/floor/tiled/white,
-/area/medical/virologyaccess)
 "jaP" = (
 /obj/effect/floor_decal/borderfloor{
 	dir = 10
@@ -18839,12 +18840,6 @@
 	},
 /turf/simulated/floor/plating,
 /area/medical/virologymaint)
-"lRl" = (
-/obj/machinery/atmospherics/component/unary/vent_pump/high_volume{
-	dir = 8
-	},
-/turf/simulated/floor/tiled,
-/area/medical/virologypurge)
 "lRy" = (
 /obj/effect/floor_decal/borderfloor{
 	dir = 1
@@ -23377,8 +23372,9 @@
 /turf/simulated/floor/tiled/monotile,
 /area/rnd/xenobiology/xenoflora)
 "ouJ" = (
-/obj/machinery/atmospherics/pipe/simple/hidden/supply{
-	dir = 5
+/obj/machinery/atmospherics/component/unary/vent_scrubber/on{
+	dir = 1;
+	power_rating = 45000
 	},
 /turf/simulated/floor/tiled,
 /area/medical/virologypurge)
@@ -24873,7 +24869,6 @@
 	icon_state = "1-2"
 	},
 /obj/machinery/atmospherics/pipe/simple/hidden/scrubbers,
-/obj/machinery/atmospherics/pipe/simple/hidden/supply,
 /turf/simulated/floor/tiled/white,
 /area/medical/virologyisolation)
 "pmV" = (
@@ -27380,9 +27375,6 @@
 /turf/simulated/floor/tiled/steel,
 /area/hallway/primary/surfaceone)
 "qTT" = (
-/obj/machinery/atmospherics/pipe/simple/visible/green{
-	dir = 4
-	},
 /obj/machinery/power/apc{
 	dir = 1;
 	name = "north bump";
@@ -27391,6 +27383,9 @@
 /obj/structure/cable/green{
 	icon_state = "0-8"
 	},
+/obj/machinery/atmospherics/pipe/manifold/visible/green{
+	dir = 1
+	},
 /turf/simulated/floor/tiled,
 /area/medical/virologypurge)
 "qTX" = (
@@ -35469,6 +35464,14 @@
 	},
 /turf/simulated/floor/tiled,
 /area/medical/virology)
+"vLk" = (
+/obj/machinery/atmospherics/pipe/simple/hidden/supply,
+/obj/machinery/atmospherics/pipe/simple/hidden/scrubbers,
+/obj/structure/cable/green{
+	icon_state = "1-2"
+	},
+/turf/simulated/floor/tiled/white,
+/area/medical/virologyaccess)
 "vLm" = (
 /obj/structure/table/steel,
 /turf/simulated/floor/tiled/steel,
@@ -36944,9 +36947,6 @@
 /area/medical/virologyisolation)
 "wCv" = (
 /obj/machinery/atmospherics/valve/open,
-/obj/machinery/atmospherics/pipe/simple/hidden/supply{
-	dir = 4
-	},
 /turf/simulated/floor/tiled,
 /area/medical/virologypurge)
 "wCw" = (
@@ -37024,6 +37024,9 @@
 /obj/effect/floor_decal/corner/green/border{
 	dir = 8
 	},
+/obj/machinery/atmospherics/pipe/simple/hidden/supply{
+	dir = 6
+	},
 /turf/simulated/floor/tiled/white,
 /area/medical/virologyisolation)
 "wEC" = (
@@ -37633,10 +37636,6 @@
 /turf/simulated/floor/outdoors/grass/heavy/interior,
 /area/rift/station/public_garden)
 "xbi" = (
-/obj/machinery/air_alarm{
-	dir = 1;
-	pixel_y = -24
-	},
 /obj/effect/floor_decal/borderfloorwhite{
 	dir = 10
 	},
@@ -37655,6 +37654,11 @@
 	pixel_y = 4
 	},
 /obj/item/storage/box/masks,
+/obj/machinery/air_alarm{
+	dir = 4;
+	pixel_x = -22
+	},
+/obj/machinery/atmospherics/pipe/simple/hidden/supply,
 /turf/simulated/floor/tiled/white,
 /area/medical/virologyisolation)
 "xbC" = (
@@ -37923,6 +37927,11 @@
 /obj/machinery/holopad,
 /turf/simulated/floor/tiled/steel,
 /area/security/prison)
+"xgG" = (
+/obj/machinery/atmospherics/pipe/simple/hidden/supply,
+/obj/spawner/window/low_wall/reinforced/full/firelocks,
+/turf/simulated/floor/plating,
+/area/medical/virologyisolation)
 "xgU" = (
 /obj/effect/floor_decal/corner/purple{
 	dir = 5
@@ -38041,8 +38050,9 @@
 /obj/structure/cable/green{
 	icon_state = "1-4"
 	},
-/obj/machinery/atmospherics/pipe/manifold/visible/green,
-/obj/machinery/atmospherics/pipe/simple/hidden/supply,
+/obj/machinery/atmospherics/pipe/simple/visible/green{
+	dir = 5
+	},
 /turf/simulated/floor/tiled,
 /area/medical/virologypurge)
 "xkq" = (
@@ -39413,7 +39423,6 @@
 	name = "Virology Purge Chamber";
 	req_one_access = list(39)
 	},
-/obj/machinery/atmospherics/pipe/simple/hidden/supply,
 /turf/simulated/floor/tiled,
 /area/medical/virologyisolation)
 "yco" = (
@@ -53447,7 +53456,7 @@ jFr
 vaW
 qjo
 kZl
-jak
+vLk
 jnU
 cZF
 qkU
@@ -60235,7 +60244,7 @@ hWe
 tVG
 wEv
 xbi
-jLF
+xgG
 bec
 tmB
 mex
@@ -60427,11 +60436,11 @@ psY
 pHX
 stV
 xfE
-pmT
+eXs
 pmT
 ybI
 xjW
-ouJ
+pYJ
 mkq
 mAk
 mAk
@@ -60819,7 +60828,7 @@ jYF
 jYF
 lCp
 qTT
-lRl
+ouJ
 lCp
 lCp
 lCp