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66 lines
1.8 KiB
Plaintext
66 lines
1.8 KiB
Plaintext
/obj/machinery/atmospherics/unary/passive_vent
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icon = 'icons/atmos/vent_pump.dmi'
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icon_state = "map_vent"
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name = "passive vent"
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desc = "A large air vent"
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can_unwrench = 1
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var/volume = 250
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/obj/machinery/atmospherics/unary/passive_vent/high_volume
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name = "large passive vent"
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volume = 1000
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/obj/machinery/atmospherics/unary/passive_vent/New()
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..()
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air_contents.volume = volume
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/obj/machinery/atmospherics/unary/passive_vent/process()
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if(!..())
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return 0
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if(!node)
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return 0
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var/datum/gas_mixture/environment = loc.return_air()
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var/pressure_delta = air_contents.return_pressure() - environment.return_pressure()
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// based on pressure_pump to equalize pressure
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// already equalized
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if(abs(pressure_delta) < 0.01)
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return 1
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if(pressure_delta > 0)
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// transfer from pipe air to environment
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if((air_contents.total_moles() > 0) && (air_contents.temperature > 0))
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var/transfer_moles = pressure_delta * environment.volume / (air_contents.temperature * R_IDEAL_GAS_EQUATION)
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transfer_moles = min(transfer_moles, volume)
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var/datum/gas_mixture/removed = air_contents.remove(transfer_moles)
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loc.assume_air(removed)
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air_update_turf()
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else
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// transfer from environment to pipe air
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pressure_delta = -pressure_delta
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if((environment.total_moles() > 0) && (environment.temperature > 0))
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var/transfer_moles = pressure_delta * air_contents.volume / (environment.temperature * R_IDEAL_GAS_EQUATION)
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transfer_moles = min(transfer_moles, volume)
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var/datum/gas_mixture/removed = loc.remove_air(transfer_moles)
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air_contents.merge(removed)
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air_update_turf()
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parent.update = 1
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return 1
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/obj/machinery/atmospherics/unary/passive_vent/update_underlays()
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if(..())
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underlays.Cut()
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var/turf/T = get_turf(src)
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if(!istype(T))
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return
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add_underlay(T, node, dir)
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