Ion Thrusters (#15518)

code/modules/overmap/ships/engines/ion_thruster.dm

@@ -0,0 +1,87 @@
+//electric engine, should be very rare
+/datum/ship_engine/ion
+	name = "ion thruster"
+	var/obj/machinery/ion_engine/thruster
+
+/datum/ship_engine/ion/New(obj/machinery/_holder)
+	..()
+	thruster = _holder
+
+/datum/ship_engine/ion/Destroy()
+	thruster = null
+	. = ..()
+
+/datum/ship_engine/ion/get_status()
+	return thruster.get_status()
+
+/datum/ship_engine/ion/get_thrust()
+	return thruster.get_thrust()
+
+/datum/ship_engine/ion/burn()
+	return thruster.burn()
+
+/datum/ship_engine/ion/set_thrust_limit(new_limit)
+	thruster.thrust_limit = new_limit
+
+/datum/ship_engine/ion/get_thrust_limit()
+	return thruster.thrust_limit
+
+/datum/ship_engine/ion/is_on()
+	return thruster.on && thruster.powered()
+
+/datum/ship_engine/ion/toggle()
+	thruster.on = !thruster.on
+
+/datum/ship_engine/ion/can_burn()
+	return thruster.on && thruster.powered()
+
+/obj/machinery/ion_engine 
+	name = "ion propulsion device"
+	desc = "An advanced ion propulsion device, using energy and a minute amount of gas to generate thrust."
+	icon = 'icons/obj/ship_engine.dmi'
+	icon_state = "nozzle"
+	power_channel = ENVIRON
+	idle_power_usage = 19600
+	anchored = TRUE
+
+	var/datum/ship_engine/ion/controller
+	var/thrust_limit = 1
+	var/on = 1
+	var/burn_cost = 36000
+	var/generated_thrust = 2.5
+
+/obj/machinery/ion_engine/Initialize()
+	. = ..()
+	controller = new(src)
+
+/obj/machinery/ion_engine/Destroy()
+	QDEL_NULL(controller)
+	. = ..()
+
+/obj/machinery/ion_engine/proc/get_status()
+	. = list()
+	.+= "Location: [get_area(src)]."
+	if(!powered())
+		.+= "Insufficient power to operate."
+
+	. = jointext(.,"<br>")
+
+/obj/machinery/ion_engine/proc/burn()
+	if(!on && !powered())
+		return 0
+	use_power_oneoff(burn_cost) 
+	. = thrust_limit * generated_thrust
+
+/obj/machinery/ion_engine/proc/get_thrust()
+	return thrust_limit * generated_thrust * on
+
+/obj/item/circuitboard/engine/ion
+	name = T_BOARD("ion propulsion device")
+	board_type = "machine"
+	icon_state = "mcontroller"
+	build_path = /obj/machinery/ion_engine
+	origin_tech = list(TECH_POWER = 4, TECH_ENGINEERING = 3)
+	req_components = list(
+							/obj/item/stack/cable_coil = 2,
+							/obj/item/stock_parts/matter_bin = 1,
+							/obj/item/stock_parts/capacitor = 2)