Kills the TEG, adds the CDR (Condensate Decay Reactor) #14059

SunShine214 · 2026-01-28T04:10:12Z

About The Pull Request

Removes the TEG (thermoelectric generator) completely... hopefully. This is my first removal so I might have missed something. This PR also adds the CDR (Condensate
Decay Reactor) to the game.

First, how the CDR works:
The CDR has four components: the core, stability, the toroid, and the harvesters.

The Core:
Gases will either deposit on the core, or diffuse off of it, to hit the set ratio of core-to-turf gases (called the metallization ratio) There, once they hit their decay threshold, will decay into other gases slowly. There is a decay chain, IE, one gases decays into another which decays into another. As gases decay, they release flux and cool the core, with each gas releasing a different amount of flux. Generally, gases further along the chain generate more flux, but also contribute to stability more.

Stability:
As gases collect on the core, they will cause the Reactor to become more stable. Stability is BAD for the CDR... as gases are experiencing rapid entropy, if they become too stable, they will collapse. You can decrease stability by increasing the core temperature, or by adding BZ gas. Stability is massively increased by low temperatures, though by how much can be reduced by adding N2O.

Toroid:
The toroid is quite simple, it will increase the amount of flux produced based on a parabolic function. As gases are input they increase toroid spin. (higher specific heats generate more spin) Toroid spin is the X-value of the parabolic function- you need to hit the sweet spot to get the most flux output. The upper limit is increased by core mass. There is also the parabolic setting variable, which makes it easier increase the X-value of the function, but the upper limit is also reduced.
Harvesters:
Flux harvesters simply convert flux into power. They have a maximum input, so at high power you need to use more of them.

Fail State:
Core health is decreased by a positive stability value, and increased by a negative one. If it reaches zero, it spawns a temporary singularity that will explode after 30 seconds. Needless to say, dont mess it up, or the area the CDR was in will simply be... gone.

Attributions for the sounds added:
https://freesound.org/people/FrazierWing/sounds/638022/
https://freesound.org/people/eguaus/sounds/321719/
https://freesound.org/people/bevibeldesign/sounds/366091/

Why It's Good For The Game

Alright, the TEG is old, ancient even, and is unmaintained, uninteresting to mess with, and ruins power economy balance. The CDR seeks to be a high power engine, but also a difficult engine to maintain. Additionally, the CDR HOPEFULLY will be more interesting then the TEG, and is hopefully less janky. Also, more engineering content!

Testing Photographs and Procedure

Screenshots&Videos

Low Power BZ CDR

Medium Power Pluox CDR

Changelog

🆑 SunShine214, Niko432
add: Added the CDR (Condensate Decay Reactor), which decays gases to make power!
add: Added a new PDA program to control CDRs. Check the engineering tab in the NTnet store!
add: Added a new pump_gas_volume proc to gas_mixture, which... pumps volume!
del: Removed the TEG.
/:cl:

…ram, added soundloop to the MDR, and addes an NTos program for the MDR

Tsar-Salat

Circulators look correctly removed.

New TGUI files should be in typescript format.
If you are unfamiliar with TSX, its just the exact same code but with static typing. This format serves as a documentation method as well as preventing errors if you use the wrong operators/values with your props or something similar.

tgui/packages/tgui/interfaces/AtmosCdr/CdrContent.tsx

tgui/packages/tgui/interfaces/NtosCdr.tsx

tgui/packages/tgui/interfaces/AtmosCdr/Graph.tsx

Tsar-Salat

Nice.

Two other things:

code/game/objects/items/circuitboards/machine_circuitboards.dm

sound/machines/cdr-mid.ogg

mrmanlikesbt · 2026-01-29T23:35:03Z

code/modules/atmospherics/gasmixtures/gas_mixture.dm

+/// Pumps gas from src to output_air. Amount depends on volume_to_pump
+/datum/gas_mixture/proc/pump_gas_volume(datum/gas_mixture/output_air, volume_to_pump)
+	var/datum/gas_mixture/removed
+	if(!volume)
+		return FALSE
+
+	removed = remove_ratio(volume_to_pump / volume)
+
+	if(!removed)
+		return FALSE
+
+	output_air.merge(removed)
+	return removed
+


I really don't like the addition of a new gas_mixture proc. Are there no pre-existing ones that do the same thing?

surprisingly, no.

at a minimum this proc should be changed so that the early return is before defining removed, and you should have the setter for it be in the same line where it's defined. also, are you sure it shouldn't check for volume_to_pump and not volume?

code/modules/power/singularity/singularity.dm

code/modules/power/rbmk/rbmk_main_processes.dm

code/modules/modular_computers/file_system/programs/cdrmonitor.dm

code/modules/power/singularity/singularity.dm

code/modules/modular_computers/file_system/programs/cdrmonitor.dm

beestation.dme

code/modules/power/condensate_decay_reactor/condensatedecayreactor.dm

…ou need to check if something can be constructed BEFORE its actually constructed.

mrmanlikesbt

something needs to happen with this space on fland

code/game/objects/items/circuitboards/circuitboard.dm

code/game/objects/items/circuitboards/machine_circuitboards.dm

code/modules/power/condensate_decay_reactor/condensate_gas.dm

code/modules/research/designs/machine_designs.dm

mrmanlikesbt · 2026-01-30T20:51:53Z

code/modules/atmospherics/gasmixtures/gas_mixture.dm

+/// Pumps gas from src to output_air. Amount depends on volume_to_pump
+/datum/gas_mixture/proc/pump_gas_volume(datum/gas_mixture/output_air, volume_to_pump)
+	var/datum/gas_mixture/removed
+	if(!volume)
+		return FALSE
+
+	removed = remove_ratio(volume_to_pump / volume)
+
+	if(!removed)
+		return FALSE
+
+	output_air.merge(removed)
+	return removed
+


at a minimum this proc should be changed so that the early return is before defining removed, and you should have the setter for it be in the same line where it's defined. also, are you sure it shouldn't check for volume_to_pump and not volume?

code/modules/power/condensate_decay_reactor/condensate_decay_reactor.dm

mrmanlikesbt · 2026-01-30T21:14:54Z

code/modules/power/condensate_decay_reactor/condensate_decay_reactor.dm

+		//this provides no feedback because it isnt normally possible to start it when its already active
+		return
+	soundloop.start()
+	resistance_flags = INDESTRUCTIBLE | LAVA_PROOF | FIRE_PROOF | UNACIDABLE | ACID_PROOF | FREEZE_PROOF //you cannot destroy it while its on... because of its quantum-flux-field!


tbh, i'm not sure that i like it being indestructible while active.

code/modules/power/condensate_decay_reactor/condensate_decay_reactor.dm

mrmanlikesbt · 2026-01-30T21:23:20Z

code/modules/power/condensate_decay_reactor/condensate_decay_reactor.dm

+/obj/machinery/power/flux_harvester
+	name = "Magnetic Flux Harvester"


look into if this could be an /obj/machinery/power/energy_accumulator

SunShine214 added 11 commits January 21, 2026 15:14

importing from icafr branch

5d5398b

undoing an oopsie

932b073

another missed thing

94e7ad7

added temporary singulatity, fixes singulos not respecting an init pa…

d8c450b

…ram, added soundloop to the MDR, and addes an NTos program for the MDR

changes, strikes down the TEG (may it rest in peace)

581804a

finished killing the teg

98a08d5

finsishing some stuff, fixing tgui

7df295d

prettierification

7d59f51

finalizing

fecaac3

prettierification

a2f0329

kills the TEG (map edition)

9b4a3bd

SunShine214 requested a review from itsmeow as a code owner January 28, 2026 04:10

github-actions bot added Mapping DMM Change Sprites Sound TGUI-Changes Contains changes to TGUI. Make sure its up to date with TGUI 4.0 labels Jan 28, 2026

SunShine214 added 3 commits January 27, 2026 21:15

harvester finished

a6f763d

added output power

ca1c4d8

me when I didnt run prettier

52af493

Tsar-Salat reviewed Jan 28, 2026

View reviewed changes

tgui/packages/tgui/interfaces/AtmosCdr/CdrContent.tsx Show resolved Hide resolved

tgui/packages/tgui/interfaces/NtosCdr.tsx Show resolved Hide resolved

tgui/packages/tgui/interfaces/AtmosCdr/Graph.tsx Show resolved Hide resolved

SunShine214 added 3 commits January 27, 2026 23:11

changed to TypeScript, also added rounding to parabolic_ratio

23b01c0

prettier!!!

86a0a67

linters

3e6ffc9

Tsar-Salat reviewed Jan 28, 2026

View reviewed changes

code/game/objects/items/circuitboards/machine_circuitboards.dm Show resolved Hide resolved

sound/machines/cdr-mid.ogg Show resolved Hide resolved

SunShine214 added 3 commits January 27, 2026 23:46

hopefully fixes linters and the rounding issue with toroid_flux_mult

dee2c25

I always forget prettier, also! Licensing

3ab82ca

renamed to the Condensate Decay Reactor

b2c0355

SunShine214 changed the title ~~Kills the TEG, adds the MDR (Metallic Decay Reactor)~~ Kills the TEG, adds the CDR (Condensate Decay Reactor) Jan 28, 2026

SunShine214 added 2 commits January 28, 2026 00:22

missed some names, also removed the ability for ghosts to act on the ui

f0e81c1

fixes sound hopefully

4c37c3c

renamed to fix NtosCdr

da4d32a

mrmanlikesbt requested changes Jan 30, 2026

View reviewed changes

SunShine214 added 3 commits January 29, 2026 22:30

one pass out of many

c45c00f

pass 2

d4823b3

core_composition is now a gas_mixture!! pass 3

1eec912

itsmeow removed their request for review January 30, 2026 06:12

SunShine214 added 8 commits January 29, 2026 23:19

pass 4

91da95a

pass 5

0216fbf

Moved CDR interfaces to its own folder

d928614

pass 6

de2b3dc

removed the silly alist stuff

b3659a1

prettier

364ecc7

added can_construct(mob/user) check to circuitboard.dm. Use this is y…

b4acab7

…ou need to check if something can be constructed BEFORE its actually constructed.

one line change

76e8090

SunShine214 requested a review from mrmanlikesbt January 30, 2026 19:19

mrmanlikesbt requested changes Jan 30, 2026

View reviewed changes

mega oopsie on my part

816b2fd

mrmanlikesbt requested changes Jan 30, 2026

View reviewed changes

SunShine214 added 6 commits January 30, 2026 15:01

pass 7

06624dc

missed a file

139d4b2

stuff

0be0009

SHOULD be most everything

769a83f

applying suggestions to pump_gas_volume

e1a740e

missed something

f95d0a1

		/obj/machinery/power/flux_harvester
		name = "Magnetic Flux Harvester"

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Kills the TEG, adds the CDR (Condensate Decay Reactor) #14059

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Kills the TEG, adds the CDR (Condensate Decay Reactor) #14059

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SunShine214 commented Jan 28, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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About The Pull Request

Why It's Good For The Game

Testing Photographs and Procedure

Changelog

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SunShine214 commented Jan 28, 2026 •

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