AGH

code/__DEFINES/atmospherics.dm

@@ -497,3 +497,8 @@ GLOBAL_LIST_INIT(pipe_paint_colors, list(
 
 #define MIASMA_CORPSE_MOLES 0.02
 #define MIASMA_GIBS_MOLES 0.005
+
+//PIPENET UPDATE STATUS
+#define PIPENET_UPDATE_STATUS_DORMANT 0
+#define PIPENET_UPDATE_STATUS_REACT_NEEDED 1
+#define PIPENET_UPDATE_STATUS_RECONCILE_NEEDED 2

code/modules/atmospherics/gasmixtures/reactions.dm

@@ -157,6 +157,20 @@ nobliumformation = 1001
 	if(istype(location) && prob(10))
 		radiation_pulse(location, energy_released/TRITIUM_BURN_RADIOACTIVITY_FACTOR)
 
+/proc/fusion_ball(datum/holder, reaction_energy, instability)
+	var/turf/open/location
+	if (istype(holder,/datum/pipeline)) //Find the tile the reaction is occuring on, or a random part of the network if it's a pipenet.
+		var/datum/pipeline/fusion_pipenet = holder
+		location = get_turf(pick(fusion_pipenet.members))
+	else
+		location = get_turf(holder)
+	if(location)
+		var/particle_chance = ((PARTICLE_CHANCE_CONSTANT)/(reaction_energy-PARTICLE_CHANCE_CONSTANT)) + 1//Asymptopically approaches 100% as the energy of the reaction goes up.
+		if(prob(PERCENT(particle_chance)))
+			location.fire_nuclear_particle()
+		var/rad_power = max((FUSION_RAD_COEFFICIENT/instability) + FUSION_RAD_MAX,0)
+		radiation_pulse(location,rad_power)
+
 /datum/gas_reaction/tritfire/react(datum/gas_mixture/air, datum/holder)
 	var/energy_released = 0
 	var/old_heat_capacity = air.heat_capacity()

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

@@ -53,7 +53,8 @@
 
 /obj/machinery/atmospherics/components/binary/dp_vent_pump/process_atmos()
 	..()
-
+	if(welded || !is_operational() || !isopenturf(loc))
+		return FALSE
 	if(!on)
 		return
 	var/datum/gas_mixture/air1 = airs[1]
@@ -75,13 +76,13 @@
 				var/transfer_moles = pressure_delta*environment.return_volume()/(air1.return_temperature() * R_IDEAL_GAS_EQUATION)
 
 				loc.assume_air_moles(air1, transfer_moles)
+
 				air_update_turf()
 
 				var/datum/pipeline/parent1 = parents[1]
-				parent1.update = 1
+				parent1.update = PIPENET_UPDATE_STATUS_RECONCILE_NEEDED
 
 	else //external -> output
-	
 		if(environment.return_pressure() > 0)
 			var/our_multiplier = air2.return_volume() / (environment.return_temperature() * R_IDEAL_GAS_EQUATION)
 			var/moles_delta = 10000 * our_multiplier
@@ -89,16 +90,15 @@
 				moles_delta = min(moles_delta, (environment_pressure - output_pressure_max) * environment.return_volume() / (environment.return_temperature() * R_IDEAL_GAS_EQUATION))
 			if(pressure_checks&INPUT_MIN)
 				moles_delta = min(moles_delta, (input_pressure_min - air2.return_pressure()) * our_multiplier)
-		
+
 			if(moles_delta > 0)
 				loc.transfer_air(air2, moles_delta)
 				air_update_turf()
 
 				var/datum/pipeline/parent2 = parents[2]
-				parent2.update = 1
-
-	//Radio remote control
+				parent2.update = PIPENET_UPDATE_STATUS_RECONCILE_NEEDED
 
+//Radio remote control
 /obj/machinery/atmospherics/components/binary/dp_vent_pump/proc/set_frequency(new_frequency)
 	SSradio.remove_object(src, frequency)
 	frequency = new_frequency

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

@@ -57,26 +57,7 @@ Passive gate is similar to the regular pump except:
 
 	var/datum/gas_mixture/air1 = airs[1]
 	var/datum/gas_mixture/air2 = airs[2]
-
-	var/output_starting_pressure = air2.return_pressure()
-	var/input_starting_pressure = air1.return_pressure()
-
-	if(output_starting_pressure >= min(target_pressure,input_starting_pressure-10))
-		//No need to pump gas if target is already reached or input pressure is too low
-		//Need at least 10 KPa difference to overcome friction in the mechanism
-		return
-
-	//Calculate necessary moles to transfer using PV = nRT
-	if((air1.total_moles() > 0) && (air1.return_temperature()>0))
-		var/pressure_delta = min(target_pressure - output_starting_pressure, (input_starting_pressure - output_starting_pressure)/2)
-		//Can not have a pressure delta that would cause output_pressure > input_pressure
-
-		var/transfer_moles = pressure_delta*air2.return_volume()/(air1.return_temperature() * R_IDEAL_GAS_EQUATION)
-
-		//Actually transfer the gas
-		var/datum/gas_mixture/removed = air1.remove(transfer_moles)
-		air2.merge(removed)
-
+	if(air1.release_gas_to(air2, target_pressure))
 		update_parents()
 
 

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

@@ -32,18 +32,31 @@
 	icon_state = "tpump_[on && is_operational() ? "on" : "off"]-[set_overlay_offset(piping_layer)]"
 
 /obj/machinery/atmospherics/components/binary/temperature_pump/process_atmos()
-	..()
+
 	if(!on || !is_operational())
 		return
 
 	var/datum/gas_mixture/air_input = airs[1]
 	var/datum/gas_mixture/air_output = airs[2]
 
-	if((air_output.return_temperature() + heat_transfer_rate) >= air_input.return_temperature() || (air_input.return_temperature() - heat_transfer_rate) <= TCRYO)
+	if(!QUANTIZE(air_input.total_moles()) || !QUANTIZE(air_output.total_moles())) //Don't transfer if there's no gas
 		return
+	var/datum/gas_mixture/remove_input = air_input.remove_ratio(0.9)
+	var/datum/gas_mixture/remove_output = air_output.remove_ratio(0.9)
+
+	var/coolant_temperature_delta = remove_input.return_temperature() - remove_output.return_temperature()
+
+	if(coolant_temperature_delta > 0)
+		var/input_capacity = remove_input.heat_capacity()
+		var/output_capacity = air_output.heat_capacity()
+
+		var/cooling_heat_amount = (heat_transfer_rate * 0.01) * coolant_temperature_delta * (input_capacity * output_capacity / (input_capacity + output_capacity))
+		remove_input.set_temperature(max(remove_input.return_temperature() - (cooling_heat_amount / input_capacity), TCMB))
+		remove_output.set_temperature(max(remove_output.return_temperature() + (cooling_heat_amount / output_capacity), TCMB))
+
+	air_input.merge(remove_input)
+	air_output.merge(remove_output)
 
-	air_input.set_temperature(air_input.return_temperature() - heat_transfer_rate)
-	air_output.set_temperature(air_output.return_temperature() + heat_transfer_rate)
 	update_parents()
 
 /obj/machinery/atmospherics/components/binary/temperature_pump/ui_interact(mob/user, datum/tgui/ui)

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

@@ -24,6 +24,17 @@ It's like a regular ol' straight pipe, but you can turn it on and off.
 
 	var/switching = FALSE
 
+
+/obj/machinery/atmospherics/components/binary/valve/Destroy()
+	//Should only happen on extreme circumstances
+	if(on)
+		//Let's give presumably now-severed pipenets a chance to scramble for what's happening at next SSair fire()
+		if(parents[1])
+			parents[1].update = PIPENET_UPDATE_STATUS_RECONCILE_NEEDED
+		if(parents[2])
+			parents[2].update = PIPENET_UPDATE_STATUS_RECONCILE_NEEDED
+	. = ..()
+
 /obj/machinery/atmospherics/components/binary/valve/update_icon_nopipes(animation = FALSE)
 	normalize_cardinal_directions()
 	if(animation)

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

@@ -133,10 +133,11 @@
 	for(var/i in 1 to device_type)
 		var/datum/pipeline/parent = parents[i]
 		if(!parent)
-			WARNING("Component is missing a pipenet! Rebuilding...")
+			//WARNING("Component is missing a pipenet! Rebuilding...")
+			//At pre-SSair_rebuild_pipenets times, not having a parent wasn't supposed to happen
 			SSair.add_to_rebuild_queue(src)
-		else
-			parent.update = 1
+			continue
+		parent.update = PIPENET_UPDATE_STATUS_RECONCILE_NEEDED
 
 /obj/machinery/atmospherics/components/returnPipenets()
 	. = list()

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

@@ -110,15 +110,15 @@
 	if(transfer_moles1)
 		air1.transfer_to(air3, transfer_moles1)
 		var/datum/pipeline/parent1 = parents[1]
-		parent1.update = TRUE
+		parent1.update = PIPENET_UPDATE_STATUS_RECONCILE_NEEDED
 
 	if(transfer_moles2)
 		air2.transfer_to(air3, transfer_moles2)
 		var/datum/pipeline/parent2 = parents[2]
-		parent2.update = TRUE
+		parent2.update = PIPENET_UPDATE_STATUS_RECONCILE_NEEDED
 
 	var/datum/pipeline/parent3 = parents[3]
-	parent3.update = TRUE
+	parent3.update = PIPENET_UPDATE_STATUS_RECONCILE_NEEDED
 
 /obj/machinery/atmospherics/components/trinary/mixer/ui_interact(mob/user, datum/tgui/ui)
 	ui = SStgui.try_update_ui(user, src, ui)

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

@@ -466,21 +466,17 @@
 	if(timing && valve_timer < world.time)
 		valve_open = !valve_open
 		timing = FALSE
+
+	// Handle gas transfer.
 	if(valve_open)
 		var/turf/T = get_turf(src)
-		pump.airs[1] = air_contents
-		pump.airs[2] = holding ? holding.air_contents : T.return_air()
-		pump.target_pressure = release_pressure
-
-		pump.process_atmos() // Pump gas.
-		if(!holding)
-			air_update_turf() // Update the environment if needed.
-	else
-		pump.airs[1] = null
-		pump.airs[2] = null
+		var/datum/gas_mixture/target_air = holding ? holding.air_contents : T.return_air()
 
+		if(air_contents.release_gas_to(target_air, release_pressure) && !holding)
+			air_update_turf()
 	update_icon()
 
+
 /obj/machinery/portable_atmospherics/canister/ui_state(mob/user)
 	return GLOB.physical_state
 

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

@@ -45,7 +45,7 @@
 	return ..()
 
 /obj/machinery/portable_atmospherics/process_atmos()
-	if(!connected_port) // Pipe network handles reactions if connected.
+	if(!connected_port && air_contents != null && src != null) // Pipe network handles reactions if connected.
 		air_contents.react(src)
 
 /obj/machinery/portable_atmospherics/return_air()
@@ -63,8 +63,7 @@
 	//Perform the connection
 	connected_port = new_port
 	connected_port.connected_device = src
-	var/datum/pipeline/connected_port_parent = connected_port.parents[1]
-	connected_port_parent.reconcile_air()
+	connected_port.parents[1].update = PIPENET_UPDATE_STATUS_RECONCILE_NEEDED
 
 	anchored = TRUE //Prevent movement
 	pixel_x = new_port.pixel_x
@@ -72,6 +71,7 @@
 	update_icon()
 	return TRUE
 
+
 /obj/machinery/portable_atmospherics/Move()
 	. = ..()
 	if(.)