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https://github.com/vgstation-coders/vgstation13.git
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157 lines
4.7 KiB
Plaintext
157 lines
4.7 KiB
Plaintext
/obj/machinery/atmospherics/binary/passive_gate
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//Tries to achieve target pressure at output (like a normal pump) except
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// Uses no power but can not transfer gases from a low pressure area to a high pressure area
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icon = 'icons/obj/atmospherics/passive_gate.dmi'
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icon_state = "intact_off"
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name = "Passive gate"
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desc = "A one-way air valve that does not require power"
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var/on = 0
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var/target_pressure = ONE_ATMOSPHERE
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var/frequency = 0
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var/id_tag = null
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var/datum/radio_frequency/radio_connection
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/obj/machinery/atmospherics/binary/passive_gate/update_icon()
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if(stat & NOPOWER)
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icon_state = "intact_off"
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else if(node1 && node2)
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icon_state = "intact_[on?("on"):("off")]"
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..()
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return
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/obj/machinery/atmospherics/binary/passive_gate/process()
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. = ..()
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if(!on)
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return
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var/output_starting_pressure = air2.return_pressure()
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var/input_starting_pressure = air1.return_pressure()
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if(output_starting_pressure >= min(target_pressure,input_starting_pressure-10))
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//No need to pump gas if target is already reached or input pressure is too low
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//Need at least 10 KPa difference to overcome friction in the mechanism
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return
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//Calculate necessary moles to transfer using PV = nRT
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if((air1.total_moles() > 0) && (air1.temperature>0))
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var/pressure_delta = min(target_pressure - output_starting_pressure, (input_starting_pressure - output_starting_pressure)/2)
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//Can not have a pressure delta that would cause output_pressure > input_pressure
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var/transfer_moles = pressure_delta*air2.volume/(air1.temperature * R_IDEAL_GAS_EQUATION)
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//Actually transfer the gas
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var/datum/gas_mixture/removed = air1.remove(transfer_moles)
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air2.merge(removed)
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if(network1)
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network1.update = 1
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if(network2)
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network2.update = 1
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return 1
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//Radio remote control
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/obj/machinery/atmospherics/binary/passive_gate/proc/set_frequency(new_frequency)
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radio_controller.remove_object(src, frequency)
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frequency = new_frequency
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if(frequency)
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radio_connection = radio_controller.add_object(src, frequency, filter = RADIO_ATMOSIA)
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/obj/machinery/atmospherics/binary/passive_gate/proc/broadcast_status()
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if(!radio_connection)
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return 0
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var/datum/signal/signal = getFromPool(/datum/signal)
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signal.transmission_method = 1 //radio signal
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signal.source = src
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signal.data = list(
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"tag" = id_tag,
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"device" = "AGP",
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"power" = on,
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"target_output" = target_pressure,
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"sigtype" = "status"
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)
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radio_connection.post_signal(src, signal, filter = RADIO_ATMOSIA)
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return 1
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/obj/machinery/atmospherics/binary/passive_gate/interact(mob/user as mob)
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var/dat = {"<b>Power: </b><a href='?src=\ref[src];power=1'>[on?"On":"Off"]</a><br>
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<b>Desirable output pressure: </b>
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[round(target_pressure,0.1)]kPa | <a href='?src=\ref[src];set_press=1'>Change</a>
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"}
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user << browse("<HEAD><TITLE>[src.name] control</TITLE></HEAD><TT>[dat]</TT>", "window=atmo_pump")
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onclose(user, "atmo_pump")
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/obj/machinery/atmospherics/binary/passive_gate/initialize()
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..()
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if(frequency)
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set_frequency(frequency)
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/obj/machinery/atmospherics/binary/passive_gate/receive_signal(datum/signal/signal)
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if(!signal.data["tag"] || (signal.data["tag"] != id_tag) || (signal.data["sigtype"]!="command"))
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return 0
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var/old_on=on
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if("power" in signal.data)
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on = text2num(signal.data["power"])
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if("power_toggle" in signal.data)
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on = !on
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if("set_output_pressure" in signal.data)
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target_pressure = Clamp(text2num(signal.data["set_output_pressure"]), 0, ONE_ATMOSPHERE * 50)
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if("status" in signal.data)
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spawn(2)
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broadcast_status()
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return //do not update_icon
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spawn(2)
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broadcast_status()
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update_icon()
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if(old_on!=on)
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investigation_log(I_ATMOS,"was powered [on ? "on" : "off"] by a remote signal")
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return
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/obj/machinery/atmospherics/binary/passive_gate/attack_hand(user as mob)
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if(..())
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return
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src.add_fingerprint(usr)
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if(!src.allowed(user))
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user << "<span class='warning'>Access denied.</span>"
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return
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usr.set_machine(src)
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interact(user)
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return
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/obj/machinery/atmospherics/binary/passive_gate/Topic(href,href_list)
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if(..()) return
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if(href_list["power"])
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on = !on
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investigation_log(I_ATMOS,"was turned [on ? "on" : "off"] by [key_name(usr)]")
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if(href_list["set_press"])
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var/new_pressure = input(usr,"Enter new output pressure (0-4500kPa)","Pressure control",src.target_pressure) as num
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src.target_pressure = max(0, min(4500, new_pressure))
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investigation_log(I_ATMOS,"was set to [target_pressure] kPa by [key_name(usr)]")
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usr.set_machine(src)
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src.update_icon()
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src.updateUsrDialog()
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return
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/obj/machinery/atmospherics/binary/passive_gate/power_change()
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..()
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update_icon()
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