Merge pull request #12444 from shellspeed1/Makes-internal-tanks-printable

Makes internal tanks printable at the engineering lathe

code/game/objects/items/tanks/tank_types.dm

@@ -93,11 +93,13 @@
 		F.update_icon()
 	else
 		return ..()
+//Makes empty oxygen tanks spawn without gas
+/obj/item/tank/internals/plasma/empty/populate_gas()
+	return
 
 /obj/item/tank/internals/plasma/full/populate_gas()
 	air_contents.gases[/datum/gas/plasma] = (10*ONE_ATMOSPHERE)*volume/(R_IDEAL_GAS_EQUATION*T20C)
 
-
 /*
  * Plasmaman Plasma Tank
  */
@@ -130,6 +132,7 @@
 	air_contents.gases[/datum/gas/plasma] = (10*ONE_ATMOSPHERE)*volume/(R_IDEAL_GAS_EQUATION*T20C)
 	return
 
+//makes empty plasma tanks spawn without gas.
 /obj/item/tank/internals/plasmaman/belt/empty/populate_gas()
 	return
 

code/modules/research/designs/misc_designs.dm

@@ -707,3 +707,57 @@
 	build_path = /obj/item/clothing/gloves/tackler/rocket
 	category = list("Equipment")
 	departmental_flags = DEPARTMENTAL_FLAG_SECURITY
+
+/////////////////////////////////////////
+/////////////Internal Tanks//////////////
+/////////////////////////////////////////
+
+/datum/design/oxygen_tank
+	name = "Oxygen Tank"
+	desc = "An empty oxygen tank."
+	id = "oxygen_tank"
+	build_type = PROTOLATHE
+	materials = list(/datum/material/iron = 2000)
+	build_path = /obj/item/tank/internals/oxygen/empty
+	category = list("Equipment")
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING
+
+/datum/design/plasma_tank
+	name = "Plasma Tank"
+	desc = "An empty plasma tank."
+	id = "plasma_tank"
+	build_type = PROTOLATHE
+	materials = list(/datum/material/iron = 2000)
+	build_path = /obj/item/tank/internals/plasma/empty
+	category = list("Equipment")
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING
+
+/datum/design/emergency_oxygen
+	name = "Emergency Oxygen Tank"
+	desc = "A small emergency oxygen tank."
+	id = "emergency_oxygen"
+	build_type = PROTOLATHE
+	materials = list(/datum/material/iron = 1000)
+	build_path = /obj/item/tank/internals/emergency_oxygen/empty
+	category = list("Equipment")
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING
+
+/datum/design/plasma_belt_tank
+	name = "Plasmaman Belt Tank"
+	desc = "A small tank of plasma for plasmamen."
+	id = "plasmaman_tank_belt"
+	build_type = PROTOLATHE
+	materials = list(/datum/material/iron = 1000)
+	build_path = /obj/item/tank/internals/plasmaman/belt/empty
+	category = list("Equipment")
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING
+
+/datum/design/emergency_oxygen_engi
+	name = "Engineering Emergency Oxygen Tank"
+	desc = "An emergency oxygen tank for engineers."
+	id = "emergency_oxygen_engi"
+	build_type = PROTOLATHE
+	materials = list(/datum/material/iron = 1000)
+	build_path = /obj/item/tank/internals/emergency_oxygen/engi/empty
+	category = list("Equipment")
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING

code/modules/research/techweb/nodes/engineering_nodes.dm

@@ -7,7 +7,8 @@
 	prereq_ids = list("base")
 	design_ids = list("solarcontrol", "recharger", "powermonitor", "rped", "pacman", "adv_capacitor", "adv_scanning", "emitter", "high_cell", "adv_matter_bin",
 	"atmosalerts", "atmos_control", "recycler", "autolathe", "autolathe_secure", "high_micro_laser", "nano_mani", "mesons", "thermomachine", "rad_collector", "tesla_coil", "grounding_rod",
-	"apc_control", "power control", "airlock_board", "firelock_board", "airalarm_electronics", "firealarm_electronics", "cell_charger", "stack_console", "stack_machine", "rcd_ammo")
+	"apc_control", "power control", "airlock_board", "firelock_board", "airalarm_electronics", "firealarm_electronics", "cell_charger", "stack_console", "stack_machine", "rcd_ammo","oxygen_tank",
+	 "plasma_tank", "emergency_oxygen", "emergency_oxygen_engi", "plasmaman_tank_belt")
 	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = 6000)
 
 /datum/techweb_node/adv_engi