obj/machinery/atmospherics/trinary/mixer
icon = 'icons/obj/atmospherics/mixer.dmi'
icon_state = "intact_off"
density = 1
name = "Gas mixer"
req_access = list(access_atmospherics)
var/on = 0
var/target_pressure = ONE_ATMOSPHERE
var/node1_concentration = 0.5
var/node2_concentration = 0.5
//node 3 is the outlet, nodes 1 & 2 are intakes
update_icon()
if(node2 && node3 && node1)
icon_state = "intact_[on?("on"):("off")]"
else
icon_state = "intact_off"
on = 0
return
New()
..()
air3.volume = 300
process()
..()
if(!on)
return 0
var/output_starting_pressure = air3.return_pressure()
if(output_starting_pressure >= target_pressure)
//No need to mix if target is already full!
return 1
//Calculate necessary moles to transfer using PV=nRT
var/pressure_delta = target_pressure - output_starting_pressure
var/transfer_moles1 = 0
var/transfer_moles2 = 0
if(air1.temperature > 0)
transfer_moles1 = (node1_concentration*pressure_delta)*air3.volume/(air1.temperature * R_IDEAL_GAS_EQUATION)
if(air2.temperature > 0)
transfer_moles2 = (node2_concentration*pressure_delta)*air3.volume/(air2.temperature * R_IDEAL_GAS_EQUATION)
var/air1_moles = air1.total_moles()
var/air2_moles = air2.total_moles()
if((air1_moles < transfer_moles1) || (air2_moles < transfer_moles2))
if(!transfer_moles1 || !transfer_moles2) return
var/ratio = min(air1_moles/transfer_moles1, air2_moles/transfer_moles2)
transfer_moles1 *= ratio
transfer_moles2 *= ratio
//Actually transfer the gas
if(transfer_moles1 > 0)
var/datum/gas_mixture/removed1 = air1.remove(transfer_moles1)
air3.merge(removed1)
if(transfer_moles2 > 0)
var/datum/gas_mixture/removed2 = air2.remove(transfer_moles2)
air3.merge(removed2)
if(network1 && transfer_moles1)
network1.update = 1
if(network2 && transfer_moles2)
network2.update = 1
if(network3)
network3.update = 1
return 1
attackby(var/obj/item/weapon/W as obj, var/mob/user as mob)
if (!istype(W, /obj/item/weapon/wrench))
return ..()
var/turf/T = src.loc
if (level==1 && isturf(T) && T.intact)
user << "\red You must remove the plating first."
return 1
var/datum/gas_mixture/int_air = return_air()
var/datum/gas_mixture/env_air = loc.return_air()
if ((int_air.return_pressure()-env_air.return_pressure()) > 2*ONE_ATMOSPHERE)
user << "\red You cannot unwrench this [src], it too exerted due to internal pressure."
add_fingerprint(user)
return 1
playsound(src.loc, 'Ratchet.ogg', 50, 1)
user << "\blue You begin to unfasten \the [src]..."
if (do_after(user, 40))
user.visible_message( \
"[user] unfastens \the [src].", \
"\blue You have unfastened \the [src].", \
"You hear ratchet.")
new /obj/item/pipe(loc, make_from=src)
del(src)
attack_hand(user as mob)
if(..())
return
src.add_fingerprint(usr)
if(!src.allowed(user))
user << "\red Access denied."
return
usr.machine = src
var/dat = {"Power: [on?"On":"Off"]
Desirable output pressure:
[target_pressure]kPa | Change
Node 1 Concentration:
-
-
[node1_concentration]([node1_concentration*100]%)
+
+
Node 2 Concentration:
-
-
[node2_concentration]([node2_concentration*100]%)
+
+
"}
user << browse("[src.name] control[dat]", "window=atmo_mixer")
onclose(user, "atmo_mixer")
return
Topic(href,href_list)
if(..()) return
if(href_list["power"])
on = !on
if(href_list["set_press"])
var/new_pressure = input(usr,"Enter new output pressure (0-4500kPa)","Pressure control",src.target_pressure) as num
src.target_pressure = max(0, min(4500, new_pressure))
if(href_list["node1_c"])
var/value = text2num(href_list["node1_c"])
src.node1_concentration = max(0, min(1, src.node1_concentration + value))
src.node2_concentration = max(0, min(1, src.node2_concentration - value))
if(href_list["node2_c"])
var/value = text2num(href_list["node2_c"])
src.node2_concentration = max(0, min(1, src.node2_concentration + value))
src.node1_concentration = max(0, min(1, src.node1_concentration - value))
src.update_icon()
src.updateUsrDialog()
return