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Aurora.3/code/game/objects/effects/spiders.dm
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BatrachophrenoandGitHub db452842bf Greimorian Egg Cluster Implantation Refactor (#21554) 
Fixes https://github.com/Aurorastation/Aurora.3/issues/21509

**Summary:**
Cleans up a lot of old Greimorian egg implantation code- rewrote the
actual worker injection behavior to use the organ/internal/parasite code
we have, instead of creating effects with their loc set to the organ
itself.

This largely means that not only is Greimorian implantation able to be
treated pharmaceutically (as you'd expect, with them being parasitic and
medicine including antiparasitics), but it also means that 'greimorian
eggs' also get the same treatment as nerve flukes, etc. That is to say,
antags can now purchase Greimorian Clade Kits from the uplink and inject
people or monkeys with them to cause Unhappy Tidings.

This code is also fairly easy to modify, if one wanted to create more
implantable parasites that burst out of people, unrelated to
Greimorians.

**Changes:**
- refactor: "Refactors the egg injection of Greimorian Workers to use
parasite code; it can now be treated with anti-parasitic medicines in
addition to amputation of the affected limb. Works on all playable
species, and monkeys."
- rscadd: "New reagent 'Greimorian Eggs' creates an egg cluster parasite
in a random organ when metabolized in the bloodstream. It also has very
mild soporific effects."
- balance: "Greimorian Workers and playable Greimorian Servants/Queen
now inject Greimorian Eggs instead of Soporific."
- rscadd: "Greimorian Clade Kit now available in Uplink under Bioweapons
section (Greimorians now able to be introduced to ship by egg cluster or
injectable reagent)."
- balance: "All parasite kit bioweapons have had their vial reagent
count increased from 2 -> 5."
- balance: "Helmizole no longer treats K'ois Mycosis, Black K'ois
Mycosis, Zombification, or Tumors (Benign or Malignant)."
  - code_imp: "Updates a lot of code documentation to dmdocs."
2025-12-02 10:53:54 +00:00

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//generic procs copied from obj/effect/alien
/obj/effect/spider
name = "web"
desc = "It's stringy and sticky, eugh. Probably came from one of those greimorians..."
icon = 'icons/effects/effects.dmi'
anchored = TRUE
density = FALSE
mouse_opacity = MOUSE_OPACITY_ICON
var/health = 15
//similar to weeds, but only barfed out by nurses manually
/obj/effect/spider/ex_act(severity)
switch(severity)
if(1.0)
qdel(src)
if(2.0)
if(prob(50))
qdel(src)
if(3.0)
if(prob(5))
qdel(src)
return
/obj/effect/spider/attackby(obj/item/attacking_item, mob/user)
visible_message(SPAN_WARNING("\The [src] has been [LAZYPICK(attacking_item.attack_verb, "attacked")] with [attacking_item][(user ? " by [user]." : ".")]"))
var/damage = attacking_item.force / 4.0
if(attacking_item.iswelder())
var/obj/item/weldingtool/WT = attacking_item
if(WT.use(0, user))
damage = 15
playsound(loc, 'sound/items/Welder.ogg', 100, 1)
return TRUE
else
user.do_attack_animation(src)
playsound(loc, attacking_item.hitsound, 50, 1, -1)
health -= damage
healthcheck()
/obj/effect/spider/bullet_act(obj/projectile/hitting_projectile, def_zone, piercing_hit)
. = ..()
if(. != BULLET_ACT_HIT)
return .
health -= hitting_projectile.get_structure_damage()
healthcheck()
/obj/effect/spider/proc/healthcheck()
if(health <= 0)
qdel(src)
/obj/effect/spider/fire_act(exposed_temperature, exposed_volume)
. = ..()
if(exposed_temperature > 300 + T0C)
health -= 5
healthcheck()
/obj/effect/spider/stickyweb
icon_state = "stickyweb1"
/obj/effect/spider/stickyweb/Initialize()
. = ..()
if(prob(50))
icon_state = "stickyweb2"
if(prob(75))
var/image/web_overlay = image(icon, icon_state = "[initial(icon_state)]-overlay[pick(1, 2, 3)]", layer = ABOVE_HUMAN_LAYER)
AddOverlays(web_overlay)
/obj/effect/spider/stickyweb/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
if(air_group || height == 0)
return TRUE
if(mover?.movement_type & PHASING)
return TRUE
if(istype(mover, /mob/living/simple_animal/hostile/giant_spider))
return TRUE
else if(istype(mover, /mob/living))
if(prob(50))
to_chat(mover, SPAN_WARNING("You get stuck in \the [src] for a moment."))
return FALSE
else if(istype(mover, /obj/projectile))
return prob(30)
return TRUE
/// The effect/spider/eggcluster is only for egg clusters spawned in-world, not implanted by a worker.
/obj/effect/spider/eggcluster
name = "egg cluster"
desc = "They seem to pulse slightly with an inner life."
icon_state = "eggs"
health = 10
var/amount_grown = 0
/obj/effect/spider/eggcluster/Initialize(var/mapload, var/atom/parent)
. = ..(mapload)
pixel_x = rand(3,-3)
pixel_y = rand(3,-3)
START_PROCESSING(SSprocessing, src)
get_light_and_color(parent)
/obj/effect/spider/eggcluster/Destroy()
STOP_PROCESSING(SSprocessing, src)
if(istype(loc, /obj/item/organ/external))
var/obj/item/organ/external/O = loc
O.implants -= src
return ..()
/obj/effect/spider/eggcluster/process()
amount_grown += rand(0, 2)
if(amount_grown >= 100)
var/num = rand(6,24)
for(var/i = 0, i < num, i++)
new /obj/effect/spider/spiderling(src.loc, src, 0.75)
qdel(src)
/obj/effect/spider/eggcluster/proc/take_damage(var/damage)
health -= damage
if(health <= 0)
qdel(src)
/obj/effect/spider/spiderling
name = "greimorian larva"
desc = "A small, agile alien creature. It oozes some disgusting slime."
desc_extended = "Greimorians are a species of arthropods whose evolutionary traits have made them an extremely dangerous invasive species. \
They originate from the Badlands planet Greima, once covered in crystalized phoron. A decaying orbit led to its combustion from proximity to its sun, and its dominant inhabitants \
managed to survive in orbit. Countless years later, they prove to be a menace across the galaxy, having carried themselves within the hulls of Human vessels to spread wildly."
icon_state = "spiderling"
anchored = FALSE
layer = OPEN_DOOR_LAYER // 2.7
health = 3
var/last_itch = 0
/// % chance that the spiderling will eventually turn into a fully-grown greimorian.
var/can_mature_chance = 50
var/can_mature = FALSE
/// Multiplier to growth gained per tick.
var/growth_rate = 1
/// Their current growth, from 0-100.
var/growth_level = 0
var/obj/machinery/atmospherics/unary/vent_pump/entry_vent
var/travelling_in_vent = 0
/// Possible creatures the larva can mature into.
var/list/possible_offspring = list(
/mob/living/simple_animal/hostile/giant_spider,
/mob/living/simple_animal/hostile/giant_spider/nurse,
/mob/living/simple_animal/hostile/giant_spider/emp,
/mob/living/simple_animal/hostile/giant_spider/hunter,
/mob/living/simple_animal/hostile/giant_spider/bombardier
)
/obj/effect/spider/spiderling/Initialize(var/mapload, var/atom/parent, var/new_growth_rate = 1, var/list/new_possible_offspring = possible_offspring)
. = ..(mapload)
pixel_x = rand(6,-6)
pixel_y = rand(6,-6)
START_PROCESSING(SSprocessing, src)
//50% chance to grow up
if(prob(can_mature_chance))
can_mature = TRUE
growth_rate = new_growth_rate
possible_offspring = new_possible_offspring
get_light_and_color(parent)
/obj/effect/spider/spiderling/Destroy()
STOP_PROCESSING(SSprocessing, src)
entry_vent = null
return ..()
/obj/effect/spider/spiderling/Collide(atom/user)
if(istype(user, /obj/structure/table))
forceMove(user.loc)
else
..()
/obj/effect/spider/spiderling/proc/die()
visible_message(SPAN_WARNING("\The [src] dies!"))
new /obj/effect/decal/cleanable/spiderling_remains(loc)
qdel(src)
/obj/effect/spider/spiderling/healthcheck()
if(health <= 0)
die()
/obj/effect/spider/spiderling/process()
if(travelling_in_vent)
if(istype(src.loc, /turf))
travelling_in_vent = 0
entry_vent = null
else if(entry_vent)
if(get_dist(src, entry_vent) <= 1)
if(entry_vent.network && entry_vent.network.normal_members.len)
var/list/vents = list()
for(var/obj/machinery/atmospherics/unary/vent_pump/temp_vent in entry_vent.network.normal_members)
vents.Add(temp_vent)
if(!vents.len)
entry_vent = null
return
var/obj/machinery/atmospherics/unary/vent_pump/exit_vent = pick(vents)
spawn(rand(20,60))
if(!QDELETED(src))
loc = exit_vent
var/travel_time = round(get_dist(loc, exit_vent.loc) / 2)
spawn(travel_time)
if(!QDELETED(src))
if(!exit_vent || exit_vent.welded)
loc = entry_vent
entry_vent = null
return
if(prob(50))
visible_message(SPAN_NOTICE("You hear something squeezing through the ventilation ducts."), range = 2)
sleep(travel_time)
if(!exit_vent || exit_vent.welded)
loc = entry_vent
entry_vent = null
return
loc = exit_vent.loc
entry_vent = null
var/area/new_area = get_area(loc)
if(new_area)
new_area.Entered(src)
else
entry_vent = null
else if(prob(25) && isturf(loc))
var/list/nearby = oview(5, src)
if(nearby.len)
var/target_atom = pick(nearby)
GLOB.move_manager.move_to(src, target_atom, 0, 5)
if(prob(25))
src.visible_message(SPAN_NOTICE("\The [src] skitters[pick(" away"," around","")]."))
else if(prob(5))
//vent crawl!
for(var/obj/machinery/atmospherics/unary/vent_pump/v in view(7,src))
if(!v.welded)
entry_vent = v
GLOB.move_manager.move_to(src, entry_vent, 0, 5)
break
if(isturf(loc) && growth_level >= 100)
var/spawn_type = pick(possible_offspring)
new spawn_type(src.loc, src)
qdel(src)
else if(prob(1))
src.visible_message(SPAN_NOTICE("\The [src] skitters."))
if(can_mature)
growth_level += (rand(0, 1) * growth_rate)
/obj/effect/spider/spiderling/attack_hand(mob/living/user)
user.setClickCooldown(DEFAULT_ATTACK_COOLDOWN)
user.do_attack_animation(src)
if(prob(20))
visible_message(SPAN_WARNING("\The [user] tries to stomp on \the [src], but misses!"))
var/list/nearby = oview(2, src)
if(length(nearby))
GLOB.move_manager.move_to(src, pick(nearby), 0, 2)
return
visible_message(SPAN_WARNING("\The [user] stomps \the [src] dead!"))
die()
/obj/effect/spider/spiderling/attackby(obj/item/attacking_item, mob/user)
. = ..()
if(istype(attacking_item, /obj/item/newspaper))
var/obj/item/newspaper/N = attacking_item
if(N.rolled)
die()
return TRUE
/obj/effect/decal/cleanable/spiderling_remains
name = "greimorian larva remains"
desc = "Green squishy mess."
icon = 'icons/effects/effects.dmi'
icon_state = "greenshatter"
/obj/effect/spider/cocoon
name = "cocoon"
desc = "Something wrapped in silky greimorian web"
icon_state = "cocoon1"
health = 60
/obj/effect/spider/cocoon/Initialize()
. = ..()
icon_state = pick("cocoon1","cocoon2","cocoon3")
/obj/effect/spider/cocoon/Destroy()
src.visible_message(SPAN_WARNING("\The [src] splits open."))
for(var/atom/movable/A in contents)
A.forceMove(src.loc)
return ..()
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