Polaris/code/modules/power/generator.dm

// dummy generator object for testing

/*/obj/machinery/power/generator/verb/set_amount(var/g as num)
	set src in view(1)

	gen_amount = g

*/
/obj/machinery/power/generator
	name = "thermoelectric generator"
	desc = "It's a high efficiency thermoelectric generator."
	icon_state = "teg"
	anchored = 1
	density = 1

	var/obj/machinery/atmospherics/binary/circulator/circ1
	var/obj/machinery/atmospherics/binary/circulator/circ2

	var/lastgen = 0
	var/lastgenlev = -1


	New()
		..()

		spawn(5)
			circ1 = locate(/obj/machinery/atmospherics/binary/circulator) in get_step(src,WEST)
			circ2 = locate(/obj/machinery/atmospherics/binary/circulator) in get_step(src,EAST)

			if(circ1)
				circ1.side = 1
				circ1.update_icon()
			if(circ2)
				circ2.side = 2
				circ2.update_icon()

			if(!circ1 || !circ2)
				stat |= BROKEN

			updateicon()

	proc/updateicon()

		if(stat & (NOPOWER|BROKEN))
			overlays = null
		else
			overlays = null

			if(lastgenlev != 0)
				overlays += image('icons/obj/power.dmi', "teg-op[lastgenlev]")

#define GENRATE 800		// generator output coefficient from Q

	process()

		//world << "Generator process ran"

		if(!circ1 || !circ2)
			return

		//world << "circ1 and circ2 pass"

		var/datum/gas_mixture/cold_air = circ1.return_transfer_air()
		var/datum/gas_mixture/hot_air = circ2.return_transfer_air()

		lastgen = 0

		//world << "hot_air = [hot_air]; cold_air = [cold_air];"

		if(cold_air && hot_air)

			//world << "hot_air = [hot_air] temperature = [hot_air.temperature]; cold_air = [cold_air] temperature = [hot_air.temperature];"

			//world << "coldair and hotair pass"
			var/cold_air_heat_capacity = cold_air.heat_capacity()
			var/hot_air_heat_capacity = hot_air.heat_capacity()

			var/delta_temperature = hot_air.temperature - cold_air.temperature

			//world << "delta_temperature = [delta_temperature]; cold_air_heat_capacity = [cold_air_heat_capacity]; hot_air_heat_capacity = [hot_air_heat_capacity]"

			if(delta_temperature > 0 && cold_air_heat_capacity > 0 && hot_air_heat_capacity > 0)
				var/efficiency = 0.65

				var/energy_transfer = delta_temperature*hot_air_heat_capacity*cold_air_heat_capacity/(hot_air_heat_capacity+cold_air_heat_capacity)

				var/heat = energy_transfer*(1-efficiency)
				lastgen = energy_transfer*efficiency

				//world << "lastgen = [lastgen]; heat = [heat]; delta_temperature = [delta_temperature]; hot_air_heat_capacity = [hot_air_heat_capacity]; cold_air_heat_capacity = [cold_air_heat_capacity];"

				hot_air.temperature = hot_air.temperature - energy_transfer/hot_air_heat_capacity
				cold_air.temperature = cold_air.temperature + heat/cold_air_heat_capacity

				world << "POWER: [lastgen] W generated at [efficiency*100]% efficiency and sinks sizes [cold_air_heat_capacity], [hot_air_heat_capacity]"

				add_avail(lastgen)
		// update icon overlays only if displayed level has changed

		if(hot_air)
			circ2.air2.merge(hot_air)

		if(cold_air)
			circ1.air2.merge(cold_air)

		var/genlev = max(0, min( round(11*lastgen / 100000), 11))
		if(genlev != lastgenlev)
			lastgenlev = genlev
			updateicon()

		src.updateDialog()

	attack_ai(mob/user)
		if(stat & (BROKEN|NOPOWER)) return
		interact(user)


	attack_hand(mob/user)
		add_fingerprint(user)
		if(stat & (BROKEN|NOPOWER)) return
		interact(user)


	proc/interact(mob/user)
		if ( (get_dist(src, user) > 1 ) && (!istype(user, /mob/living/silicon/ai)))
			user.machine = null
			user << browse(null, "window=teg")
			return

		user.machine = src

		var/t = "<PRE><B>Thermo-Electric Generator</B><HR>"

		t += "Output : [round(lastgen)] W<BR><BR>"

		t += "<B>Cold loop</B><BR>"
		t += "Temperature Inlet: [round(circ1.air1.temperature, 0.1)] K  Outlet: [round(circ1.air2.temperature, 0.1)] K<BR>"
		t += "Pressure Inlet: [round(circ1.air1.return_pressure(), 0.1)] kPa  Outlet: [round(circ1.air2.return_pressure(), 0.1)] kPa<BR>"

		t += "<B>Hot loop</B><BR>"
		t += "Temperature Inlet: [round(circ2.air1.temperature, 0.1)] K  Outlet: [round(circ2.air2.temperature, 0.1)] K<BR>"
		t += "Pressure Inlet: [round(circ2.air1.return_pressure(), 0.1)] kPa  Outlet: [round(circ2.air2.return_pressure(), 0.1)] kPa<BR>"

		t += "<BR><HR><A href='?src=\ref[src];close=1'>Close</A>"

		t += "</PRE>"
		user << browse(t, "window=teg;size=460x300")
		onclose(user, "teg")
		return 1


	Topic(href, href_list)
		..()
		if( href_list["close"] )
			usr << browse(null, "window=teg")
			usr.machine = null
			return 0
		return 1


	power_change()
		..()
		updateicon()