mirror of
https://github.com/vgstation-coders/vgstation13.git
synced 2025-12-10 10:21:11 +00:00
55 lines
1.7 KiB
Plaintext
55 lines
1.7 KiB
Plaintext
obj/machinery/atmospherics/binary/passive_gate
|
|
//Tries to achieve target pressure at output (like a normal pump) except
|
|
// Uses no power but can not transfer gases from a low pressure area to a high pressure area
|
|
icon = 'passive_gate.dmi'
|
|
icon_state = "intact_off"
|
|
|
|
name = "Passive gate"
|
|
desc = "A one-way air valve that does not require power"
|
|
|
|
var/on = 0
|
|
var/target_pressure = ONE_ATMOSPHERE
|
|
|
|
update_icon()
|
|
if(node1&&node2)
|
|
icon_state = "intact_[on?("on"):("off")]"
|
|
else
|
|
if(node1)
|
|
icon_state = "exposed_1_off"
|
|
else if(node2)
|
|
icon_state = "exposed_2_off"
|
|
else
|
|
icon_state = "exposed_3_off"
|
|
on = 0
|
|
|
|
return
|
|
|
|
process()
|
|
..()
|
|
if(!on)
|
|
return 0
|
|
|
|
var/output_starting_pressure = air2.return_pressure()
|
|
var/input_starting_pressure = air1.return_pressure()
|
|
|
|
if(output_starting_pressure >= min(target_pressure,input_starting_pressure-10))
|
|
//No need to pump gas if target is already reached or input pressure is too low
|
|
//Need at least 10 KPa difference to overcome friction in the mechanism
|
|
return 1
|
|
|
|
//Calculate necessary moles to transfer using PV = nRT
|
|
if((air1.total_moles() > 0) && (air1.temperature>0))
|
|
var/pressure_delta = min(target_pressure - output_starting_pressure, (input_starting_pressure - output_starting_pressure)/2)
|
|
//Can not have a pressure delta that would cause output_pressure > input_pressure
|
|
|
|
var/transfer_moles = pressure_delta*air2.volume/(air1.temperature * R_IDEAL_GAS_EQUATION)
|
|
|
|
//Actually transfer the gas
|
|
var/datum/gas_mixture/removed = air1.remove(transfer_moles)
|
|
air2.merge(removed)
|
|
|
|
if(network1)
|
|
network1.update = 1
|
|
|
|
if(network2)
|
|
network2.update = 1 |