Editing Guide to mapping (section)

== Atmospherics ==

=== Pipes and manifolds ===

Atmospherics releases it's cocktail of gases into the air supply loop (blue pipes). The station is also equipped with a scrubber loop, which filters unwanted gases and sends them back to atmospherics via the scrubber loop (red pipes).

If you're expanding the air supply loop (blue pipes) use the objects in /obj/machinery/atmospherics/pipe/simple/supply/visible or ../hidden depending on if you want it to show above floors or below them. For manifolds use the objects in /obj/machinery/atmospherics/pipe/manifold/supply/visible and ../hidden.

If you are expanding the scrubber loop (red pipes) use the objects in /obj/machinery/atmospherics/pipe/simple/scrubbers/visible or ../hidden depending on if you want it to show above floors or below them. For manifolds use the objects in /obj/machinery/atmospherics/pipe/manifold/scrubbers/visible and ../hidden.

If you are however building a pipe network which has nothing to do with the air supply or scrubbers loop, you should use the objects in /obj/machinery/atmospherics/pipe/simple/general/visible or ../hidden. For manifolds use the objects in /obj/machinery/atmospherics/pipe/manifold/general/visible and ../hidden. 

To add new colors of pipes, you will need add a new subtypes in the appropriate .dm files located in tgstation\code\modules\atmospherics\machinery\pipes

Please refrain from var-editing pipes, as it typically introduces graphical glitches and other issues.

=== Air Alarm ===

Every single area (with scrubbers and/or vent pumps) should have exactly one air alarm. More than one should be placed if vent pumps or scrubbers use different radio frequencies than the default one (1439).

=== Scrubbers (Station air supply) ===

Every room (ie. walled off space) except for maintenance hallways should have at least one scrubber.

The path for scrubbers that start on is '''/obj/machinery/atmospherics/components/unary/vent_scrubber/on'''

And make sure the '''id_tag''' is the default one (null)

Also ensure the scrubber is connected to the scrubber loop!!

=== Vent Pumps (Station air supply) ===

Every room (ie. walled off space) except for maintenance hallways should have at least one vent pump.

The path for vents that start on is '''/obj/machinery/atmospherics/components/unary/vent_pump/on'''

Please make sure the '''id_tag''' is the default one (null)

Also ensure the vent pump is connected to the air supply loop!!

=== Gas tanks and filters ===

Each station should have a full set of these - or at the bare minimum, one for N2, one for O2 and a third tank to filter dangerous gases into.

[[File:Atmos mapping.jpg|right|frame|Left to right: N2, O2, Airmix. The canisters inside are just for decoration.]]

Each gas tank needs:
* '''Outside''': A tank computer and a gas filter to pick what gases will be filtered into it.
* '''Inside''': A gas injector (input), a vent pump (output), a gas sensor and a specific turf.

The tank computer controls the input/output and receives data from the gas sensor.

The specific turf creates the gases that will be inside each tank - the gas canister is just for decoration.

Let's take a look at the MetaStation N2 tank:

* '''Tank computer''': /obj/machinery/computer/atmos_control/tank/nitrogen_tank
* '''N2 filter''': /obj/machinery/atmospherics/components/trinary/filter/atmos/n2
* '''Gas injector''': /obj/machinery/atmospherics/components/unary/outlet_injector/atmos/nitrogen_input
* '''Vent pump''': /obj/machinery/atmospherics/components/unary/vent_pump/siphon/atmos/nitrogen_output
* '''Gas sensor''': /obj/machinery/air_sensor/atmos/nitrogen_tank
* '''Turf''': /turf/open/floor/engine/n2

These objects have all the neccessary vars preset and start switched on - you'll only have to edit the dir if neccessary.

Additionally, you'll want this type of gas mixer for the airmix tank (N2 + O2):

* '''Air mixer''': /obj/machinery/atmospherics/components/trinary/mixer/airmix