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Oxycandles (#4650)

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This PR adds new item - oxycandles.

The idea is based of this thread.

chemical bases oxygen candles that when activated can provide enough oxygen to make tiny-small vented spaces with oxygen.
Oxycandles properties:

When activated the chemical reaction cannot be stopped - emergency use only.

Small size, can fit anywhere.

Can restore air in very tiny-small vented place.
This commit is contained in:
Mykhailo Bykhovtsev
2018-05-11 12:22:57 -07:00
committed by Erki
parent 03cf84880c
commit 115802425f
7 changed files with 87 additions and 0 deletions
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code/game/objects/items/devices/oxycandle.dm
+73
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@@ -0,0 +1,73 @@
/obj/item/device/oxycandle
name = "oxygen candle"
desc = "A steel tube with the words 'OXYGEN - PULL CORD TO IGNITE' stamped on the side. A small label warns against using the device underwater"
icon = 'icons/obj/device.dmi'
icon_state = "oxycandle"
item_state = "oxycandle"
w_class = ITEMSIZE_SMALL // Should fit into internal's box or maybe pocket
var/target_pressure = ONE_ATMOSPHERE
var/datum/gas_mixture/air_contents = null
var/volume = 5600 // One tile has 2500 volume of air, so two tiles plus a bit extra
var/on = FALSE
var/activation_sound = 'sound/items/flare.ogg'
light_color = LIGHT_COLOR_FLARE
uv_intensity = 50
var/brightness_on = 2 // Moderate bright.
light_power = 2
action_button_name = null
/obj/item/device/oxycandle/attack_self(mob/user)
if(!on)
user << "<span class='notice'>You pull the cord and [src] ignites.</span>"
light_range = brightness_on
on = TRUE
update_icon()
playsound(src.loc, activation_sound, 75, 1)
air_contents = new /datum/gas_mixture()
air_contents.volume = 200 //liters
air_contents.temperature = T20C
var/list/air_mix = list("oxygen" = O2STANDARD * (target_pressure * air_contents.volume) / (R_IDEAL_GAS_EQUATION * air_contents.temperature),
"nitrogen" = N2STANDARD * (target_pressure * air_contents.volume) / (R_IDEAL_GAS_EQUATION * air_contents.temperature))
air_contents.adjust_multi("oxygen", air_mix["oxygen"], "nitrogen", air_mix["nitrogen"])
START_PROCESSING(SSprocessing, src)
// Process of Oxygen candles releasing air. Makes 200 volume of oxygen and nitrogen mix
/obj/item/device/oxycandle/process()
if(!loc)
return
var/turf/pos = get_turf(src)
if(volume <= 0 || istype(pos, /turf/simulated/floor/beach/water) || istype(pos, /turf/unsimulated/beach/water))
STOP_PROCESSING(SSprocessing, src)
icon_state = "oxycandle_burnt"
item_state = icon_state
set_light(0)
update_held_icon()
name = "burnt oxygen candle"
desc += "This tube has exhausted its chemicals."
return
if(pos)
pos.hotspot_expose(1500, 5)
var/datum/gas_mixture/environment = loc.return_air()
var/pressure_delta = target_pressure - environment.return_pressure()
var/output_volume = environment.volume * environment.group_multiplier
var/air_temperature = air_contents.temperature? air_contents.temperature : environment.temperature
var/transfer_moles = pressure_delta*output_volume/(air_temperature * R_IDEAL_GAS_EQUATION)
var/datum/gas_mixture/removed = air_contents.remove(transfer_moles)
if (!removed) //Just in case
return
environment.merge(removed)
volume -= 200
var/list/air_mix = list("oxygen" = O2STANDARD * (target_pressure * air_contents.volume) / (R_IDEAL_GAS_EQUATION * air_contents.temperature),
"nitrogen" = N2STANDARD * (target_pressure * air_contents.volume) / (R_IDEAL_GAS_EQUATION * air_contents.temperature))
air_contents.adjust_multi("oxygen", air_mix["oxygen"], "nitrogen", air_mix["nitrogen"])
/obj/item/device/oxycandle/update_icon()
if(on)
icon_state = "oxycandle_on"
item_state = icon_state
set_light(brightness_on)
else
icon_state = "oxycandle"
item_state = icon_state
set_light(0)
update_held_icon()
code/game/objects/structures/crates_lockers/closets/utility_closets.dm
+7
View File
@@ -28,6 +28,7 @@
new /obj/item/clothing/mask/breath(src)
new /obj/item/clothing/suit/space/emergency(src)
new /obj/item/clothing/head/helmet/space/emergency(src)
new /obj/item/device/oxycandle(src)
if ("aid")
new /obj/item/weapon/tank/emergency_oxygen(src)
new /obj/item/weapon/storage/toolbox/emergency(src)
@@ -35,11 +36,14 @@
new /obj/item/weapon/storage/firstaid/o2(src)
new /obj/item/clothing/suit/space/emergency(src)
new /obj/item/clothing/head/helmet/space/emergency(src)
new /obj/item/device/oxycandle(src)
if ("tank")
new /obj/item/weapon/tank/emergency_oxygen/engi(src)
new /obj/item/clothing/mask/breath(src)
new /obj/item/weapon/tank/emergency_oxygen/engi(src)
new /obj/item/clothing/mask/breath(src)
new /obj/item/device/oxycandle(src)
new /obj/item/device/oxycandle(src)
if ("both")
new /obj/item/weapon/storage/toolbox/emergency(src)
new /obj/item/weapon/tank/emergency_oxygen/engi(src)
@@ -49,6 +53,9 @@
new /obj/item/clothing/suit/space/emergency(src)
new /obj/item/clothing/head/helmet/space/emergency(src)
new /obj/item/clothing/head/helmet/space/emergency(src)
new /obj/item/device/oxycandle(src)
new /obj/item/device/oxycandle(src)
new /obj/item/device/oxycandle(src)
/obj/structure/closet/emcloset/legacy/fill()
..()