removes silly garbage defines

code/__DEFINES/atmospherics.dm

@@ -123,38 +123,12 @@
 #define MAX_OUTPUT_PRESSURE					4500 // (kPa) What pressure pumps and powered equipment max out at.
 #define MAX_TRANSFER_RATE					200 // (L/s) Maximum speed powered equipment can work at.
 
-//used for device_type vars; used by DEVICE_TYPE_LOOP
+//used for device_type vars
 #define UNARY		1
 #define BINARY 		2
 #define TRINARY		3
 #define QUATERNARY	4
 
-//TODO: finally remove this bullshit
-//this is the standard for loop used by all sorts of atmos machinery procs
-#define DEVICE_TYPE_LOOP	var/I in 1 to device_type
-
-//defines for the various machinery lists
-//NODE_I, AIR_I, PARENT_I are used within DEVICE_TYPE_LOOP
-
-//nodes list - all atmos machinery
-#define NODE1	nodes[1]
-#define	NODE2	nodes[2]
-#define NODE3	nodes[3]
-#define NODE4	nodes[4]
-#define NODE_I	nodes[I]
-
-//airs list - components only
-#define AIR1	airs[1]
-#define AIR2	airs[2]
-#define AIR3	airs[3]
-#define AIR_I	airs[I]
-
-//parents list - components only
-#define PARENT1		parents[1]
-#define PARENT2		parents[2]
-#define PARENT3		parents[3]
-#define PARENT_I	parents[I]
-
 //TANKS
 #define TANK_MELT_TEMPERATURE				1000000	//temperature in kelvins at which a tank will start to melt
 #define TANK_LEAK_PRESSURE					(30.*ONE_ATMOSPHERE)	//Tank starts leaking

code/game/objects/effects/spiders.dm

@@ -133,7 +133,7 @@
 	else if(entry_vent)
 		if(get_dist(src, entry_vent) <= 1)
 			var/list/vents = list()
-			var/datum/pipeline/entry_vent_parent = entry_vent.PARENT1
+			var/datum/pipeline/entry_vent_parent = entry_vent.parents[1]
 			for(var/obj/machinery/atmospherics/components/unary/vent_pump/temp_vent in entry_vent_parent.other_atmosmch)
 				vents.Add(temp_vent)
 			if(!vents.len)

code/modules/admin/verbs/atmosdebug.dm

@@ -13,12 +13,12 @@
 
 	//Manifolds
 	for (var/obj/machinery/atmospherics/pipe/manifold/pipe in GLOB.machines)
-		if (!pipe.NODE1 || !pipe.NODE2 || !pipe.NODE3)
+		if (!pipe.nodes[1] || !pipe.nodes[2] || !pipe.nodes[3])
 			to_chat(usr, "Unconnected [pipe.name] located at [pipe.x],[pipe.y],[pipe.z] ([get_area(pipe.loc)])")
 
 	//Pipes
 	for (var/obj/machinery/atmospherics/pipe/simple/pipe in GLOB.machines)
-		if (!pipe.NODE1 || !pipe.NODE2)
+		if (!pipe.nodes[1] || !pipe.nodes[2])
 			to_chat(usr, "Unconnected [pipe.name] located at [pipe.x],[pipe.y],[pipe.z] ([get_area(pipe.loc)])")
 
 /client/proc/powerdebug()

code/modules/atmospherics/machinery/atmosmachinery.dm

@@ -60,8 +60,8 @@ Pipelines + Other Objects -> Pipe network
 	SetInitDirections()
 
 /obj/machinery/atmospherics/Destroy()
-	for(DEVICE_TYPE_LOOP)
+	for(var/i in 1 to device_type)
-		nullifyNode(I)
+		nullifyNode(i)
 
 	SSair.atmos_machinery -= src
 
@@ -79,22 +79,22 @@ Pipelines + Other Objects -> Pipe network
 	// Called to build a network from this node
 	return
 
-/obj/machinery/atmospherics/proc/nullifyNode(I)
+/obj/machinery/atmospherics/proc/nullifyNode(i)
-	if(NODE_I)
+	if(nodes[i])
-		var/obj/machinery/atmospherics/N = NODE_I
+		var/obj/machinery/atmospherics/N = nodes[i]
 		N.disconnect(src)
-		NODE_I = null
+		nodes[i] = null
 
 /obj/machinery/atmospherics/proc/getNodeConnects()
 	var/list/node_connects = list()
 	node_connects.len = device_type
 
-	for(DEVICE_TYPE_LOOP)
+	for(var/i in 1 to device_type)
 		for(var/D in GLOB.cardinals)
 			if(D & GetInitDirections())
 				if(D in node_connects)
 					continue
-				node_connects[I] = D
+				node_connects[i] = D
 				break
 	return node_connects
 
@@ -109,10 +109,10 @@ Pipelines + Other Objects -> Pipe network
 	if(!node_connects) //for pipes where order of nodes doesn't matter
 		node_connects = getNodeConnects()
 
-	for(DEVICE_TYPE_LOOP)
+	for(var/i in 1 to device_type)
-		for(var/obj/machinery/atmospherics/target in get_step(src,node_connects[I]))
+		for(var/obj/machinery/atmospherics/target in get_step(src,node_connects[i]))
-			if(can_be_node(target, I))
+			if(can_be_node(target, i))
-				NODE_I = target
+				nodes[i] = target
 				break
 	update_icon()
 
@@ -171,8 +171,7 @@ Pipelines + Other Objects -> Pipe network
 	if(istype(reference, /obj/machinery/atmospherics/pipe))
 		var/obj/machinery/atmospherics/pipe/P = reference
 		P.destroy_network()
-	var/I = nodes.Find(reference)
+	nodes[nodes.Find(reference)] = null
-	NODE_I = null
 	update_icon()
 
 /obj/machinery/atmospherics/update_icon()

code/modules/atmospherics/machinery/components/binary_devices/circulator.dm

@@ -21,8 +21,8 @@
 
 /obj/machinery/atmospherics/components/binary/circulator/proc/return_transfer_air()
 
-	var/datum/gas_mixture/air1 = AIR1
+	var/datum/gas_mixture/air1 = airs[1]
-	var/datum/gas_mixture/air2 = AIR2
+	var/datum/gas_mixture/air2 = airs[2]
 
 	var/output_starting_pressure = air1.return_pressure()
 	var/input_starting_pressure = air2.return_pressure()

code/modules/atmospherics/machinery/components/binary_devices/dp_vent_pump.dm

@@ -49,8 +49,8 @@ Acts like a normal vent, but has an input AND output.
 
 /obj/machinery/atmospherics/components/binary/dp_vent_pump/high_volume/New()
 	..()
-	var/datum/gas_mixture/air1 = AIR1
+	var/datum/gas_mixture/air1 = airs[1]
-	var/datum/gas_mixture/air2 = AIR2
+	var/datum/gas_mixture/air2 = airs[2]
 	air1.volume = 1000
 	air2.volume = 1000
 
@@ -73,8 +73,8 @@ Acts like a normal vent, but has an input AND output.
 
 	if(!on)
 		return
-	var/datum/gas_mixture/air1 = AIR1
+	var/datum/gas_mixture/air1 = airs[1]
-	var/datum/gas_mixture/air2 = AIR2
+	var/datum/gas_mixture/air2 = airs[2]
 
 	var/datum/gas_mixture/environment = loc.return_air()
 	var/environment_pressure = environment.return_pressure()
@@ -99,7 +99,7 @@ Acts like a normal vent, but has an input AND output.
 				loc.assume_air(removed)
 				air_update_turf()
 
-				var/datum/pipeline/parent1 = PARENT1
+				var/datum/pipeline/parent1 = parents[1]
 				parent1.update = 1
 
 	else //external -> output
@@ -122,7 +122,7 @@ Acts like a normal vent, but has an input AND output.
 				air2.merge(removed)
 				air_update_turf()
 
-				var/datum/pipeline/parent2 = PARENT2
+				var/datum/pipeline/parent2 = parents[2]
 				parent2.update = 1
 
 	//Radio remote control

code/modules/atmospherics/machinery/components/binary_devices/passive_gate.dm

@@ -41,8 +41,8 @@ Passive gate is similar to the regular pump except:
 	if(!on)
 		return
 
-	var/datum/gas_mixture/air1 = AIR1
+	var/datum/gas_mixture/air1 = airs[1]
-	var/datum/gas_mixture/air2 = AIR2
+	var/datum/gas_mixture/air2 = airs[2]
 
 	var/output_starting_pressure = air2.return_pressure()
 	var/input_starting_pressure = air1.return_pressure()

code/modules/atmospherics/machinery/components/binary_devices/pump.dm

@@ -50,8 +50,8 @@ Thus, the two variables affect pump operation are set in New():
 	if(!on || !is_operational())
 		return
 
-	var/datum/gas_mixture/air1 = AIR1
+	var/datum/gas_mixture/air1 = airs[1]
-	var/datum/gas_mixture/air2 = AIR2
+	var/datum/gas_mixture/air2 = airs[2]
 
 	var/output_starting_pressure = air2.return_pressure()
 

code/modules/atmospherics/machinery/components/binary_devices/valve.dm

@@ -31,7 +31,7 @@ It's like a regular ol' straight pipe, but you can turn it on and off.
 	open = TRUE
 	update_icon_nopipes()
 	update_parents()
-	var/datum/pipeline/parent1 = PARENT1
+	var/datum/pipeline/parent1 = parents[1]
 	parent1.reconcile_air()
 	investigate_log("was opened by [usr ? key_name(usr) : "a remote signal"]", INVESTIGATE_ATMOS)
 

code/modules/atmospherics/machinery/components/binary_devices/volume_pump.dm

@@ -48,8 +48,8 @@ Thus, the two variables affect pump operation are set in New():
 	if(!on || !is_operational())
 		return
 
-	var/datum/gas_mixture/air1 = AIR1
+	var/datum/gas_mixture/air1 = airs[1]
-	var/datum/gas_mixture/air2 = AIR2
+	var/datum/gas_mixture/air2 = airs[2]
 
 // Pump mechanism just won't do anything if the pressure is too high/too low
 
@@ -151,8 +151,13 @@ Thus, the two variables affect pump operation are set in New():
 		on = !on
 
 	if("set_transfer_rate" in signal.data)
+<<<<<<< HEAD
 		var/datum/gas_mixture/air1 = AIR1
 		transfer_rate = Clamp(text2num(signal.data["set_transfer_rate"]),0,air1.volume)
+=======
+		var/datum/gas_mixture/air1 = airs[1]
+		transfer_rate = CLAMP(text2num(signal.data["set_transfer_rate"]),0,air1.volume)
+>>>>>>> 6a7dbaa... removes silly garbage defines (#33621)
 
 	if(on != old_on)
 		investigate_log("was turned [on ? "on" : "off"] by a remote signal", INVESTIGATE_ATMOS)

code/modules/atmospherics/machinery/components/components_base.dm

@@ -15,10 +15,10 @@ On top of that, now people can add component-speciic procs/vars if they want!
 	airs = new(device_type)
 	..()
 
-	for(DEVICE_TYPE_LOOP)
+	for(var/i in 1 to device_type)
 		var/datum/gas_mixture/A = new
 		A.volume = 200
-		AIR_I = A
+		airs[i] = A
 /*
 Iconnery
 */
@@ -42,9 +42,9 @@ Iconnery
 
 	var/connected = 0 //Direction bitset
 
-	for(DEVICE_TYPE_LOOP) //adds intact pieces
+	for(var/i in 1 to device_type) //adds intact pieces
-		if(NODE_I)
+		if(nodes[i])
-			connected |= icon_addintact(NODE_I)
+			connected |= icon_addintact(nodes[i])
 
 	icon_addbroken(connected) //adds broken pieces
 
@@ -53,52 +53,45 @@ Iconnery
 Pipenet stuff; housekeeping
 */
 
-/obj/machinery/atmospherics/components/nullifyNode(I)
+/obj/machinery/atmospherics/components/nullifyNode(i)
 	..()
-	if(NODE_I)
+	if(nodes[i])
-		nullifyPipenet(PARENT_I)
+		nullifyPipenet(parents[i])
-		qdel(AIR_I)
+		QDEL_NULL(airs[i])
-		AIR_I = null
 
 /obj/machinery/atmospherics/components/on_construction()
 	..()
 	update_parents()
 
 /obj/machinery/atmospherics/components/build_network()
-	for(DEVICE_TYPE_LOOP)
+	for(var/i in 1 to device_type)
-		if(!PARENT_I)
+		if(!parents[i])
-			PARENT_I = new /datum/pipeline()
+			parents[i] = new /datum/pipeline()
-			var/datum/pipeline/P = PARENT_I
+			var/datum/pipeline/P = parents[i]
 			P.build_pipeline(src)
 
 /obj/machinery/atmospherics/components/proc/nullifyPipenet(datum/pipeline/reference)
-	var/I = parents.Find(reference)
+	var/i = parents.Find(reference)
-	reference.other_airs -= AIR_I
+	reference.other_airs -= airs[i]
 	reference.other_atmosmch -= src
-	PARENT_I = null
+	parents[i] = null
 
 /obj/machinery/atmospherics/components/returnPipenetAir(datum/pipeline/reference)
-	var/I = parents.Find(reference)
+	return airs[parents.Find(reference)]
-	return AIR_I
 
 /obj/machinery/atmospherics/components/pipeline_expansion(datum/pipeline/reference)
 	if(reference)
-		var/I = parents.Find(reference)
+		return list(nodes[parents.Find(reference)])
-		return list(NODE_I)
+	return ..()
-	else
-		return ..()
 
 /obj/machinery/atmospherics/components/setPipenet(datum/pipeline/reference, obj/machinery/atmospherics/A)
-	var/I = nodes.Find(A)
+	parents[nodes.Find(A)] = reference
-	PARENT_I = reference
 
-/obj/machinery/atmospherics/components/returnPipenet(obj/machinery/atmospherics/A = NODE1) //returns PARENT1 if called without argument
+/obj/machinery/atmospherics/components/returnPipenet(obj/machinery/atmospherics/A = nodes[1]) //returns parents[1] if called without argument
-	var/I = nodes.Find(A)
+	return parents[nodes.Find(A)]
-	return PARENT_I
 
 /obj/machinery/atmospherics/components/replacePipenet(datum/pipeline/Old, datum/pipeline/New)
-	var/I = parents.Find(Old)
+	parents[parents.Find(Old)] = New
-	PARENT_I = New
 
 /obj/machinery/atmospherics/components/unsafe_pressure_release(var/mob/user, var/pressures)
 	..()
@@ -109,15 +102,15 @@ Pipenet stuff; housekeeping
 		var/datum/gas_mixture/environment = T.return_air()
 		var/lost = null
 		var/times_lost = 0
-		for(DEVICE_TYPE_LOOP)
+		for(var/i in 1 to device_type)
-			var/datum/gas_mixture/air = AIR_I
+			var/datum/gas_mixture/air = airs[i]
 			lost += pressures*environment.volume/(air.temperature * R_IDEAL_GAS_EQUATION)
 			times_lost++
 		var/shared_loss = lost/times_lost
 
 		var/datum/gas_mixture/to_release
-		for(DEVICE_TYPE_LOOP)
+		for(var/i in 1 to device_type)
-			var/datum/gas_mixture/air = AIR_I
+			var/datum/gas_mixture/air = airs[i]
 			if(!to_release)
 				to_release = air.remove(shared_loss)
 				continue
@@ -136,8 +129,8 @@ Helpers
 */
 
 /obj/machinery/atmospherics/components/proc/update_parents()
-	for(DEVICE_TYPE_LOOP)
+	for(var/i in 1 to device_type)
-		var/datum/pipeline/parent = PARENT_I
+		var/datum/pipeline/parent = parents[i]
 		if(!parent)
 			throw EXCEPTION("Component is missing a pipenet! Rebuilding...")
 			build_network()
@@ -145,8 +138,8 @@ Helpers
 
 /obj/machinery/atmospherics/components/returnPipenets()
 	. = list()
-	for(DEVICE_TYPE_LOOP)
+	for(var/i in 1 to device_type)
-		. += returnPipenet(NODE_I)
+		. += returnPipenet(nodes[i])
 
 /*
 UI Stuff
@@ -157,4 +150,3 @@ UI Stuff
 		return ..()
 	to_chat(user, "<span class='danger'>Access denied.</span>")
 	return UI_CLOSE
-

code/modules/atmospherics/machinery/components/trinary_devices/filter.dm

@@ -50,7 +50,7 @@
 	..()
 
 /obj/machinery/atmospherics/components/trinary/filter/update_icon_nopipes()
-	if(on && NODE1 && NODE2 && NODE3 && is_operational())
+	if(on && nodes[1] && nodes[2] && nodes[3] && is_operational())
 		icon_state = "filter_on[flipped?"_f":""]"
 		return
 	icon_state = "filter_off[flipped?"_f":""]"
@@ -63,12 +63,12 @@
 
 /obj/machinery/atmospherics/components/trinary/filter/process_atmos()
 	..()
-	if(!on || !(NODE1 && NODE2 && NODE3) || !is_operational())
+	if(!on || !(nodes[1] && nodes[2] && nodes[3]) || !is_operational())
 		return
 
-	var/datum/gas_mixture/air1 = AIR1
+	var/datum/gas_mixture/air1 = airs[1]
-	var/datum/gas_mixture/air2 = AIR2
+	var/datum/gas_mixture/air2 = airs[2]
-	var/datum/gas_mixture/air3 = AIR3
+	var/datum/gas_mixture/air3 = airs[3]
 
 	var/output_starting_pressure = air3.return_pressure()
 

code/modules/atmospherics/machinery/components/trinary_devices/mixer.dm

@@ -33,7 +33,7 @@
 	return ..()
 
 /obj/machinery/atmospherics/components/trinary/mixer/update_icon_nopipes()
-	if(on && NODE1 && NODE2 && NODE3 && is_operational())
+	if(on && nodes[1] && nodes[2] && nodes[3] && is_operational())
 		icon_state = "mixer_on[flipped?"_f":""]"
 		return
 	icon_state = "mixer_off[flipped?"_f":""]"
@@ -46,18 +46,18 @@
 
 /obj/machinery/atmospherics/components/trinary/mixer/New()
 	..()
-	var/datum/gas_mixture/air3 = AIR3
+	var/datum/gas_mixture/air3 = airs[3]
 	air3.volume = 300
-	AIR3 = air3
+	airs[3] = air3
 
 /obj/machinery/atmospherics/components/trinary/mixer/process_atmos()
 	..()
-	if(!on || !(NODE1 && NODE2 && NODE3) && !is_operational())
+	if(!on || !(nodes[1] && nodes[2] && nodes[3]) && !is_operational())
 		return
 
-	var/datum/gas_mixture/air1 = AIR1
+	var/datum/gas_mixture/air1 = airs[1]
-	var/datum/gas_mixture/air2 = AIR2
+	var/datum/gas_mixture/air2 = airs[2]
-	var/datum/gas_mixture/air3 = AIR3
+	var/datum/gas_mixture/air3 = airs[3]
 
 	var/output_starting_pressure = air3.return_pressure()
 
@@ -103,14 +103,14 @@
 		air3.merge(removed2)
 
 	if(transfer_moles1)
-		var/datum/pipeline/parent1 = PARENT1
+		var/datum/pipeline/parent1 = parents[1]
 		parent1.update = TRUE
 
 	if(transfer_moles2)
-		var/datum/pipeline/parent2 = PARENT2
+		var/datum/pipeline/parent2 = parents[2]
 		parent2.update = TRUE
 
-	var/datum/pipeline/parent3 = PARENT3
+	var/datum/pipeline/parent3 = parents[3]
 	parent3.update = TRUE
 
 	return

code/modules/atmospherics/machinery/components/unary_devices/cryo.dm

@@ -174,7 +174,7 @@
 			open_machine()
 		return
 
-	var/datum/gas_mixture/air1 = AIR1
+	var/datum/gas_mixture/air1 = airs[1]
 
 	if(air1.gases.len)
 		if(mob_occupant.bodytemperature < T0C) // Sleepytime. Why? More cryo magic.
@@ -196,9 +196,9 @@
 	if(!on)
 		return
 
-	var/datum/gas_mixture/air1 = AIR1
+	var/datum/gas_mixture/air1 = airs[1]
 
-	if(!NODE1 || !AIR1 || !air1.gases.len || air1.gases[/datum/gas/oxygen][MOLES] < 5) // Turn off if the machine won't work.
+	if(!nodes[1] || !airs[1] || !air1.gases.len || air1.gases[/datum/gas/oxygen][MOLES] < 5) // Turn off if the machine won't work.
 		on = FALSE
 		update_icon()
 		return
@@ -348,8 +348,12 @@
 		else
 			data["occupant"]["temperaturestatus"] = "bad"
 
+<<<<<<< HEAD
 
 	var/datum/gas_mixture/air1 = AIR1
+=======
+	var/datum/gas_mixture/air1 = airs[1]
+>>>>>>> 6a7dbaa... removes silly garbage defines (#33621)
 	data["cellTemperature"] = round(air1.temperature, 1)
 
 	data["isBeakerLoaded"] = beaker ? TRUE : FALSE
@@ -401,7 +405,7 @@
 	return 0 // you can't see the pipe network when inside a cryo cell.
 
 /obj/machinery/atmospherics/components/unary/cryo_cell/return_temperature()
-	var/datum/gas_mixture/G = AIR1
+	var/datum/gas_mixture/G = airs[1]
 
 	if(G.total_moles() > 10)
 		return G.temperature
@@ -411,13 +415,13 @@
 	. = ..()
 	if(.)
 		SetInitDirections()
-		var/obj/machinery/atmospherics/node = NODE1
+		var/obj/machinery/atmospherics/node = nodes[1]
 		if(node)
 			node.disconnect(src)
-			NODE1 = null
+			nodes[1] = null
-		nullifyPipenet(PARENT1)
+		nullifyPipenet(parents[1])
 		atmosinit()
-		node = NODE1
+		node = nodes[1]
 		if(node)
 			node.atmosinit()
 			node.addMember(src)

code/modules/atmospherics/machinery/components/unary_devices/heat_exchanger.dm

@@ -15,9 +15,9 @@
 	pipe_state = "heunary"
 
 /obj/machinery/atmospherics/components/unary/heat_exchanger/update_icon()
-	if(NODE1)
+	if(nodes[1])
 		icon_state = "he_intact"
-		var/obj/machinery/atmospherics/node = NODE1
+		var/obj/machinery/atmospherics/node = nodes[1]
 		add_atom_colour(node.color, FIXED_COLOUR_PRIORITY)
 	else
 		icon_state = "he_exposed"
@@ -42,8 +42,8 @@
 	update_cycle = SSair.times_fired
 	partner.update_cycle = SSair.times_fired
 
-	var/datum/gas_mixture/air_contents = AIR1
+	var/datum/gas_mixture/air_contents = airs[1]
-	var/datum/gas_mixture/partner_air_contents = partner.AIR1
+	var/datum/gas_mixture/partner_air_contents = partner.airs[1]
 
 	var/air_heat_capacity = air_contents.heat_capacity()
 	var/other_air_heat_capacity = partner_air_contents.heat_capacity()

code/modules/atmospherics/machinery/components/unary_devices/outlet_injector.dm

@@ -32,7 +32,7 @@
 	if(showpipe)
 		add_overlay(getpipeimage(icon, "inje_cap", initialize_directions))
 
-	if(!NODE1 || !on || !is_operational())
+	if(!nodes[1] || !on || !is_operational())
 		icon_state = "inje_off"
 		return
 
@@ -53,7 +53,7 @@
 	if(!on || !is_operational())
 		return
 
-	var/datum/gas_mixture/air_contents = AIR1
+	var/datum/gas_mixture/air_contents = airs[1]
 
 	if(air_contents.temperature > 0)
 		var/transfer_moles = (air_contents.return_pressure())*volume_rate/(air_contents.temperature * R_IDEAL_GAS_EQUATION)
@@ -70,7 +70,7 @@
 	if(on || injecting || !is_operational())
 		return
 
-	var/datum/gas_mixture/air_contents = AIR1
+	var/datum/gas_mixture/air_contents = airs[1]
 
 	injecting = 1
 
@@ -130,8 +130,13 @@
 
 	if("set_volume_rate" in signal.data)
 		var/number = text2num(signal.data["set_volume_rate"])
+<<<<<<< HEAD
 		var/datum/gas_mixture/air_contents = AIR1
 		volume_rate = Clamp(number, 0, air_contents.volume)
+=======
+		var/datum/gas_mixture/air_contents = airs[1]
+		volume_rate = CLAMP(number, 0, air_contents.volume)
+>>>>>>> 6a7dbaa... removes silly garbage defines (#33621)
 
 	if("status" in signal.data)
 		spawn(2)

code/modules/atmospherics/machinery/components/unary_devices/portables_connector.dm

@@ -13,7 +13,7 @@
 
 /obj/machinery/atmospherics/components/unary/portables_connector/New()
 	..()
-	var/datum/gas_mixture/air_contents = AIR1
+	var/datum/gas_mixture/air_contents = airs[1]
 
 	air_contents.volume = 0
 

code/modules/atmospherics/machinery/components/unary_devices/tank.dm

@@ -13,7 +13,7 @@
 
 /obj/machinery/atmospherics/components/unary/tank/New()
 	..()
-	var/datum/gas_mixture/air_contents = AIR1
+	var/datum/gas_mixture/air_contents = airs[1]
 	air_contents.volume = volume
 	air_contents.temperature = T20C
 	if(gas_type)
@@ -43,7 +43,7 @@
 
 /obj/machinery/atmospherics/components/unary/tank/air/New()
 	..()
-	var/datum/gas_mixture/air_contents = AIR1
+	var/datum/gas_mixture/air_contents = airs[1]
 	air_contents.assert_gases(/datum/gas/oxygen, /datum/gas/nitrogen)
 	air_contents.gases[/datum/gas/oxygen][MOLES] = AIR_CONTENTS * 0.2
 	air_contents.gases[/datum/gas/nitrogen][MOLES] = AIR_CONTENTS * 0.8

code/modules/atmospherics/machinery/components/unary_devices/thermomachine.dm

@@ -48,9 +48,9 @@
 
 /obj/machinery/atmospherics/components/unary/thermomachine/process_atmos()
 	..()
-	if(!on || !NODE1)
+	if(!on || !nodes[1])
 		return
-	var/datum/gas_mixture/air_contents = AIR1
+	var/datum/gas_mixture/air_contents = airs[1]
 
 	var/air_heat_capacity = air_contents.heat_capacity()
 	var/combined_heat_capacity = heat_capacity + air_heat_capacity
@@ -88,14 +88,14 @@
 	if(!..())
 		return 0
 	SetInitDirections()
-	var/obj/machinery/atmospherics/node = NODE1
+	var/obj/machinery/atmospherics/node = nodes[1]
 	if(node)
 		node.disconnect(src)
-		NODE1 = null
+		nodes[1] = null
-	nullifyPipenet(PARENT1)
+	nullifyPipenet(parents[1])
 
 	atmosinit()
-	node = NODE1
+	node = nodes[1]
 	if(node)
 		node.atmosinit()
 		node.addMember(src)
@@ -123,7 +123,7 @@
 	data["target"] = target_temperature
 	data["initial"] = initial(target_temperature)
 
-	var/datum/gas_mixture/air1 = AIR1
+	var/datum/gas_mixture/air1 = airs[1]
 	data["temperature"] = air1.temperature
 	data["pressure"] = air1.return_pressure()
 	return data

code/modules/atmospherics/machinery/components/unary_devices/vent_pump.dm

@@ -81,7 +81,7 @@
 
 /obj/machinery/atmospherics/components/unary/vent_pump/high_volume/New()
 	..()
-	var/datum/gas_mixture/air_contents = AIR1
+	var/datum/gas_mixture/air_contents = airs[1]
 	air_contents.volume = 1000
 
 /obj/machinery/atmospherics/components/unary/vent_pump/update_icon_nopipes()
@@ -93,7 +93,7 @@
 		icon_state = "vent_welded"
 		return
 
-	if(!NODE1 || !on || !is_operational())
+	if(!nodes[1] || !on || !is_operational())
 		if(icon_state == "vent_welded")
 			icon_state = "vent_off"
 			return
@@ -122,12 +122,12 @@
 	..()
 	if(!is_operational())
 		return
-	if(!NODE1)
+	if(!nodes[1])
 		on = FALSE
 	if(!on || welded)
 		return
 
-	var/datum/gas_mixture/air_contents = AIR1
+	var/datum/gas_mixture/air_contents = airs[1]
 	var/datum/gas_mixture/environment = loc.return_air()
 	var/environment_pressure = environment.return_pressure()
 

code/modules/atmospherics/machinery/components/unary_devices/vent_scrubber.dm

@@ -77,7 +77,7 @@
 		icon_state = "scrub_welded"
 		return
 
-	if(!NODE1 || !on || !is_operational())
+	if(!nodes[1] || !on || !is_operational())
 		icon_state = "scrub_off"
 		return
 
@@ -142,7 +142,7 @@
 	..()
 	if(welded || !is_operational())
 		return FALSE
-	if(!NODE1 || !on)
+	if(!nodes[1] || !on)
 		on = FALSE
 		return FALSE
 	scrub(loc)
@@ -156,7 +156,7 @@
 		return FALSE
 
 	var/datum/gas_mixture/environment = tile.return_air()
-	var/datum/gas_mixture/air_contents = AIR1
+	var/datum/gas_mixture/air_contents = airs[1]
 	var/list/env_gases = environment.gases
 
 	if(air_contents.return_pressure() >= 50*ONE_ATMOSPHERE)

code/modules/atmospherics/machinery/datum_pipeline.dm

@@ -216,8 +216,8 @@
 		GL += P.return_air()
 		for(var/obj/machinery/atmospherics/components/binary/valve/V in P.other_atmosmch)
 			if(V.open)
-				PL |= V.PARENT1
+				PL |= V.parents[1]
-				PL |= V.PARENT2
+				PL |= V.parents[2]
 		for(var/obj/machinery/atmospherics/components/unary/portables_connector/C in P.other_atmosmch)
 			if(C.connected_device)
 				GL += C.portableConnectorReturnAir()

code/modules/atmospherics/machinery/pipes/heat_exchange/manifold.dm

@@ -32,9 +32,9 @@
 	cut_overlays()
 
 	//Add non-broken pieces
-	for(DEVICE_TYPE_LOOP)
+	for(var/i in 1 to device_type)
-		if(NODE_I)
+		if(nodes[i])
-			add_overlay(getpipeimage('icons/obj/atmospherics/pipes/heat.dmi', "manifold_intact[invis]", get_dir(src, NODE_I)))
+			add_overlay(getpipeimage('icons/obj/atmospherics/pipes/heat.dmi', "manifold_intact[invis]", get_dir(src, nodes[i])))
 
 //4-way manifold
 /obj/machinery/atmospherics/pipe/heat_exchanging/manifold4w
@@ -61,6 +61,6 @@
 	cut_overlays()
 
 	//Add non-broken pieces
-	for(DEVICE_TYPE_LOOP)
+	for(var/i in 1 to device_type)
-		if(NODE_I)
+		if(nodes[i])
-			add_overlay(getpipeimage('icons/obj/atmospherics/pipes/heat.dmi', "manifold_intact[invis]", get_dir(src, NODE_I)))
+			add_overlay(getpipeimage('icons/obj/atmospherics/pipes/heat.dmi', "manifold_intact[invis]", get_dir(src, nodes[i])))

code/modules/atmospherics/machinery/pipes/layermanifold.dm

@@ -107,14 +107,14 @@
 		P.destroy_network()
 	while(reference in get_all_connected_nodes())
 		if(reference in nodes)
-			var/I = nodes.Find(reference)
+			var/i = nodes.Find(reference)
-			NODE_I = null
+			nodes[i] = null
 		if(reference in front_nodes)
-			var/I = front_nodes.Find(reference)
+			var/i = front_nodes.Find(reference)
-			front_nodes[I] = null
+			front_nodes[i] = null
 		if(reference in back_nodes)
-			var/I = back_nodes.Find(reference)
+			var/i = back_nodes.Find(reference)
-			back_nodes[I] = null
+			back_nodes[i] = null
 	update_icon()
 
 /obj/machinery/atmospherics/pipe/layer_manifold/relaymove(mob/living/user, dir)

code/modules/atmospherics/machinery/pipes/manifold.dm

@@ -35,9 +35,9 @@
 	cut_overlays()
 
 	//Add non-broken pieces
-	for(DEVICE_TYPE_LOOP)
+	for(var/i in 1 to device_type)
-		if(NODE_I)
+		if(nodes[i])
-			add_overlay(getpipeimage('icons/obj/atmospherics/pipes/manifold.dmi', "manifold_full[invis]", get_dir(src, NODE_I)))
+			add_overlay(getpipeimage('icons/obj/atmospherics/pipes/manifold.dmi', "manifold_full[invis]", get_dir(src, nodes[i])))
 
 //Colored pipes, use these for mapping
 /obj/machinery/atmospherics/pipe/manifold/general

code/modules/atmospherics/machinery/pipes/manifold4w.dm

@@ -26,9 +26,9 @@
 	cut_overlays()
 
 	//Add non-broken pieces
-	for(DEVICE_TYPE_LOOP)
+	for(var/i in 1 to device_type)
-		if(NODE_I)
+		if(nodes[i])
-			add_overlay(getpipeimage('icons/obj/atmospherics/pipes/manifold.dmi', "manifold_full[invis]", get_dir(src, NODE_I)))
+			add_overlay(getpipeimage('icons/obj/atmospherics/pipes/manifold.dmi', "manifold_full[invis]", get_dir(src, nodes[i])))
 
 //Colored pipes, use these for mapping
 /obj/machinery/atmospherics/pipe/manifold4w/general

code/modules/atmospherics/machinery/pipes/pipes.dm

@@ -18,8 +18,8 @@
 	volume = 35 * device_type
 	..()
 
-/obj/machinery/atmospherics/pipe/nullifyNode(I)
+/obj/machinery/atmospherics/pipe/nullifyNode(i)
-	var/obj/machinery/atmospherics/oldN = NODE_I
+	var/obj/machinery/atmospherics/oldN = nodes[i]
 	..()
 	if(oldN)
 		oldN.build_network()
@@ -33,11 +33,11 @@
 		parent.build_pipeline(src)
 
 /obj/machinery/atmospherics/pipe/update_icon() //overridden by manifolds
-	if(NODE1&&NODE2)
+	if(nodes[1] && nodes[2])
 		icon_state = "intact[invisibility ? "-f" : "" ]"
 	else
-		var/have_node1 = NODE1?1:0
+		var/have_node1 = nodes[1] ? TRUE : FALSE
-		var/have_node2 = NODE2?1:0
+		var/have_node2 = nodes[2] ? TRUE : FALSE
 		icon_state = "exposed[have_node1][have_node2][invisibility ? "-f" : "" ]"
 
 /obj/machinery/atmospherics/pipe/atmosinit()
@@ -91,9 +91,9 @@
 	QDEL_NULL(parent)
 
 /obj/machinery/atmospherics/pipe/proc/update_node_icon()
-	for(DEVICE_TYPE_LOOP)
+	for(var/i in 1 to device_type)
-		if(NODE_I)
+		if(nodes[i])
-			var/obj/machinery/atmospherics/N = NODE_I
+			var/obj/machinery/atmospherics/N = nodes[i]
 			N.update_icon()
 
 /obj/machinery/atmospherics/pipe/returnPipenets()
@@ -109,4 +109,3 @@
 	pipe_color = paint_color
 	update_node_icon()
 	return TRUE
-

code/modules/atmospherics/machinery/portable/canister.dm

@@ -324,13 +324,13 @@
 		valve_open = !valve_open
 		timing = FALSE
 	if(!valve_open)
-		pump.AIR1 = null
+		pump.airs[1] = null
-		pump.AIR2 = null
+		pump.airs[2] = null
 		return
 
 	var/turf/T = get_turf(src)
-	pump.AIR1 = air_contents
+	pump.airs[1] = air_contents
-	pump.AIR2 = holding ? holding.air_contents : T.return_air()
+	pump.airs[2] = holding ? holding.air_contents : T.return_air()
 	pump.target_pressure = release_pressure
 
 	pump.process_atmos() // Pump gas.

code/modules/atmospherics/machinery/portable/portable_atmospherics.dm

@@ -54,7 +54,7 @@
 	//Perform the connection
 	connected_port = new_port
 	connected_port.connected_device = src
-	var/datum/pipeline/connected_port_parent = connected_port.PARENT1
+	var/datum/pipeline/connected_port_parent = connected_port.parents[1]
 	connected_port_parent.reconcile_air()
 
 	anchored = TRUE //Prevent movement

code/modules/atmospherics/machinery/portable/pump.dm

@@ -41,17 +41,17 @@
 /obj/machinery/portable_atmospherics/pump/process_atmos()
 	..()
 	if(!on)
-		pump.AIR1 = null
+		pump.airs[1] = null
-		pump.AIR2 = null
+		pump.airs[2] = null
 		return
 
 	var/turf/T = get_turf(src)
 	if(direction == PUMP_OUT) // Hook up the internal pump.
-		pump.AIR1 = holding ? holding.air_contents : air_contents
+		pump.airs[1] = holding ? holding.air_contents : air_contents
-		pump.AIR2 = holding ? air_contents : T.return_air()
+		pump.airs[2] = holding ? air_contents : T.return_air()
 	else
-		pump.AIR1 = holding ? air_contents : T.return_air()
+		pump.airs[1] = holding ? air_contents : T.return_air()
-		pump.AIR2 = holding ? holding.air_contents : air_contents
+		pump.airs[2] = holding ? holding.air_contents : air_contents
 
 	pump.process_atmos() // Pump gas.
 	if(!holding)

code/modules/events/alien_infestation.dm

@@ -41,7 +41,7 @@
 		if(QDELETED(temp_vent))
 			continue
 		if((temp_vent.loc.z in GLOB.station_z_levels) && !temp_vent.welded)
-			var/datum/pipeline/temp_vent_parent = temp_vent.PARENT1
+			var/datum/pipeline/temp_vent_parent = temp_vent.parents[1]
 			//Stops Aliens getting stuck in small networks.
 			//See: Security, Virology
 			if(temp_vent_parent.other_atmosmch.len > 20)

code/modules/events/spider_infestation.dm

@@ -23,7 +23,7 @@
 	var/list/vents = list()
 	for(var/obj/machinery/atmospherics/components/unary/vent_pump/temp_vent in world)
 		if((temp_vent.loc.z in GLOB.station_z_levels) && !temp_vent.welded)
-			var/datum/pipeline/temp_vent_parent = temp_vent.PARENT1
+			var/datum/pipeline/temp_vent_parent = temp_vent.parents[1]
 			if(temp_vent_parent.other_atmosmch.len > 20)
 				vents += temp_vent
 

code/modules/events/vent_clog.dm

@@ -20,7 +20,7 @@
 	endWhen = rand(25, 100)
 	for(var/obj/machinery/atmospherics/components/unary/vent_scrubber/temp_vent in GLOB.machines)
 		if((temp_vent.loc.z in GLOB.station_z_levels) && !temp_vent.welded)
-			var/datum/pipeline/temp_vent_parent = temp_vent.PARENT1
+			var/datum/pipeline/temp_vent_parent = temp_vent.parents[1]
 			if(temp_vent_parent.other_atmosmch.len > 20)
 				vents += temp_vent
 	if(!vents.len)

code/modules/mob/living/ventcrawling.dm

@@ -45,7 +45,7 @@ GLOBAL_LIST_INIT(ventcrawl_machinery, typecacheof(list(
 
 
 	if(vent_found)
-		var/datum/pipeline/vent_found_parent = vent_found.PARENT1
+		var/datum/pipeline/vent_found_parent = vent_found.parents[1]
 		if(vent_found_parent && (vent_found_parent.members.len || vent_found_parent.other_atmosmch))
 			visible_message("<span class='notice'>[src] begins climbing into the ventilation system...</span>" ,"<span class='notice'>You begin climbing into the ventilation system...</span>")
 

code/modules/power/generator.dm

@@ -99,11 +99,11 @@
 		// update icon overlays only if displayed level has changed
 
 		if(hot_air)
-			var/datum/gas_mixture/hot_circ_air1 = hot_circ.AIR1
+			var/datum/gas_mixture/hot_circ_air1 = hot_circ.airs[1]
 			hot_circ_air1.merge(hot_air)
 
 		if(cold_air)
-			var/datum/gas_mixture/cold_circ_air1 = cold_circ.AIR1
+			var/datum/gas_mixture/cold_circ_air1 = cold_circ.airs[1]
 			cold_circ_air1.merge(cold_air)
 
 		update_icon()
@@ -134,10 +134,10 @@
 	if(!powernet)
 		t += "<span class='bad'>Unable to connect to the power network!</span>"
 	else if(cold_circ && hot_circ)
-		var/datum/gas_mixture/cold_circ_air1 = cold_circ.AIR1
+		var/datum/gas_mixture/cold_circ_air1 = cold_circ.airs[1]
-		var/datum/gas_mixture/cold_circ_air2 = cold_circ.AIR2
+		var/datum/gas_mixture/cold_circ_air2 = cold_circ.airs[2]
-		var/datum/gas_mixture/hot_circ_air1 = hot_circ.AIR1
+		var/datum/gas_mixture/hot_circ_air1 = hot_circ.airs[1]
-		var/datum/gas_mixture/hot_circ_air2 = hot_circ.AIR2
+		var/datum/gas_mixture/hot_circ_air2 = hot_circ.airs[2]
 
 		t += "<div class='statusDisplay'>"
 

code/modules/shuttle/on_move.dm

@@ -209,9 +209,9 @@ All ShuttleMove procs go here
 /obj/machinery/atmospherics/afterShuttleMove(turf/oldT, list/movement_force, shuttle_dir, shuttle_preferred_direction, move_dir, rotation)
 	. = ..()
 	var/missing_nodes = FALSE
-	for(DEVICE_TYPE_LOOP)
+	for(var/i in 1 to device_type)
-		if(src.nodes[I])
+		if(nodes[i])
-			var/obj/machinery/atmospherics/node = src.nodes[I]
+			var/obj/machinery/atmospherics/node = nodes[i]
 			var/connected = FALSE
 			for(var/D in GLOB.cardinals)
 				if(node in get_step(src, D))
@@ -219,9 +219,9 @@ All ShuttleMove procs go here
 					break
 
 			if(!connected)
-				nullifyNode(I)
+				nullifyNode(i)
 
-		if(!src.nodes[I])
+		if(!nodes[i])
 			missing_nodes = TRUE
 
 	if(missing_nodes)

code/modules/shuttle/shuttle_rotate.dm

@@ -84,17 +84,17 @@ If ever any of these procs are useful for non-shuttles, rename it to proc/rotate
 
 /obj/machinery/atmospherics/shuttleRotate(rotation, params)
 	var/list/real_node_connect = getNodeConnects()
-	for(DEVICE_TYPE_LOOP)
+	for(var/i in 1 to device_type)
-		real_node_connect[I] = angle2dir(rotation+dir2angle(real_node_connect[I]))
+		real_node_connect[i] = angle2dir(rotation+dir2angle(real_node_connect[i]))
 
 	. = ..()
 	SetInitDirections()
 	var/list/supposed_node_connect = getNodeConnects()
 	var/list/nodes_copy = nodes.Copy()
 
-	for(DEVICE_TYPE_LOOP)
+	for(var/i in 1 to device_type)
-		var/new_pos = supposed_node_connect.Find(real_node_connect[I])
+		var/new_pos = supposed_node_connect.Find(real_node_connect[i])
-		nodes[new_pos] = nodes_copy[I]
+		nodes[new_pos] = nodes_copy[i]
 
 //prevents shuttles attempting to rotate this since it messes up sprites
 /obj/machinery/gateway/shuttleRotate(rotation, params)
@@ -104,4 +104,4 @@ If ever any of these procs are useful for non-shuttles, rename it to proc/rotate
 //prevents shuttles attempting to rotate this since it messes up sprites
 /obj/machinery/gravity_generator/shuttleRotate(rotation, params)
 	params = NONE
-	return ..()
+	return ..()