i forgor :dead:

code/__DEFINES/reactions.dm

@@ -74,3 +74,5 @@
 #define FUSION_RAD_MAX						1500
 #define FUSION_RAD_COEFFICIENT				(-1000)
 #define FUSION_INSTABILITY_ENDOTHERMALITY   2
+// Snowflake fire product types
+#define FIRE_PRODUCT_PLASMA 				0

code/modules/atmospherics/auxgm/gas_types.dm

@@ -46,7 +46,7 @@
 	flags = GAS_FLAG_DANGEROUS
 	fire_burn_rate = OXYGEN_BURN_RATE_BASE // named when plasma fires were the only fires, surely
 	fire_temperature = FIRE_MINIMUM_TEMPERATURE_TO_EXIST
-	fire_products = "plasma_fire"
+	fire_products = FIRE_PRODUCT_PLASMA
 	enthalpy = FIRE_PLASMA_ENERGY_RELEASED // 3000000, 3 megajoules, 3000 kj
 
 /datum/gas/water_vapor

code/modules/atmospherics/gasmixtures/gas_mixture.dm

@@ -138,16 +138,24 @@ we use a hook instead
 /datum/gas_mixture/proc/set_volume(new_volume)
 /datum/gas_mixture/proc/get_moles(gas_type)
 /datum/gas_mixture/proc/set_moles(gas_type, moles)
+/datum/gas_mixture/proc/get_by_flag(flag)
 /datum/gas_mixture/proc/scrub_into(datum/gas_mixture/target, ratio, list/gases)
 /datum/gas_mixture/proc/mark_immutable()
 /datum/gas_mixture/proc/get_gases()
+/datum/gas_mixture/proc/add(amt)
+/datum/gas_mixture/proc/subtract(amt)
 /datum/gas_mixture/proc/multiply(factor)
+/datum/gas_mixture/proc/divide(factor)
 /datum/gas_mixture/proc/get_last_share()
 /datum/gas_mixture/proc/clear()
 
 /datum/gas_mixture/proc/adjust_moles(gas_type, amt = 0)
 	set_moles(gas_type, clamp(get_moles(gas_type) + amt,0,INFINITY))
 
+/datum/gas_mixture/proc/adjust_moles_temp(gas_type, amt, temperature)
+
+/datum/gas_mixture/proc/adjust_multi()
+
 /datum/gas_mixture/proc/return_volume() //liters
 
 /datum/gas_mixture/proc/thermal_energy() //joules
@@ -164,6 +172,10 @@ we use a hook instead
 	//Proportionally removes amount of gas from the gas_mixture
 	//Returns: gas_mixture with the gases removed
 
+/datum/gas_mixture/proc/remove_by_flag(flag, amount)
+	//Removes amount of gas from the gas mixture by flag
+	//Returns: gas_mixture with gases that match the flag removed
+
 /datum/gas_mixture/proc/transfer_to(datum/gas_mixture/target, amount)
 
 /datum/gas_mixture/proc/transfer_ratio_to(datum/gas_mixture/target, ratio)
@@ -223,6 +235,14 @@ we use a hook instead
 	//Makes every gas in the given list have the same pressure, temperature and gas proportions.
 	//Returns: null
 
+/datum/gas_mixture/proc/__remove_by_flag()
+
+/datum/gas_mixture/remove_by_flag(flag, amount)
+	var/datum/gas_mixture/removed = new type
+	__remove_by_flag(removed, flag, amount)
+
+	return removed
+
 /datum/gas_mixture/proc/__remove()
 /datum/gas_mixture/remove(amount)
 	var/datum/gas_mixture/removed = new type