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Aurora.3/code/modules/mob/mob_grab.dm
Geeves 00e20ba0fe Grab Tweaks (#7465) 
Grabs have been lightly buffed across the board. It should be slightly more effective now.
    It is now more difficult to resist out of grabs, and doing so while you're on the floor is much more difficult.
    Various species has had their grab mod modified, making them easier or harder to grab.
    Using the grab in hand will now cause you to stop strangling the person, but you maintain the strong grab. No longer do you have to drop someone to stop choking them out.
    You can no longer strangle people with airtight helmets. (voidsuits, rigs, etc)
2019-12-29 12:14:25 +02:00

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#define UPGRADE_COOLDOWN 40
#define UPGRADE_KILL_TIMER 100
//This is called from human_attackhand.dm before grabbing happens.
//IT is called when grabber tries to grab this mob
//Override this for special grab behaviour.
//Returning 0 will make grab fail, returning 1 will suceed
/mob/living/proc/attempt_grab(var/mob/living/grabber)
return 1
//As above, but called when someone tries to pull this mob
/mob/living/proc/attempt_pull(var/mob/living/grabber)
return 1
///Process_Grab()
///Called by client/Move()
///Checks to see if you are grabbing or being grabbed by anything and if moving will affect your grab.
/client/proc/Process_Grab()
if(isliving(mob)) //if we are being grabbed
var/mob/living/L = mob
if(!L.canmove && L.grabbed_by.len)
L.resist() //shortcut for resisting grabs
for(var/obj/item/grab/G in list(mob.l_hand, mob.r_hand))
G.reset_kill_state() //no wandering across the station/asteroid while choking someone
/obj/item/grab
name = "grab"
icon = 'icons/mob/screen/generic.dmi'
icon_state = "reinforce"
flags = 0
var/obj/screen/grab/hud = null
var/mob/living/affecting = null
var/mob/living/carbon/human/assailant = null
var/state = GRAB_PASSIVE
var/allow_upgrade = 1
var/last_action = 0
var/last_hit_zone = 0
var/force_down //determines if the affecting mob will be pinned to the ground
var/dancing //determines if assailant and affecting keep looking at each other. Basically a wrestling position
layer = SCREEN_LAYER
abstract = 1
item_state = "nothing"
w_class = 5.0
/obj/item/grab/New(mob/user, mob/victim)
..()
loc = user
assailant = user
affecting = victim
if(affecting.anchored || !assailant.Adjacent(victim))
qdel(src)
return
affecting.grabbed_by += src
hud = new /obj/screen/grab(src)
hud.icon_state = "reinforce"
icon_state = "grabbed"
hud.name = "reinforce grab"
hud.master = src
//check if assailant is grabbed by victim as well
if(assailant.grabbed_by)
for (var/obj/item/grab/G in assailant.grabbed_by)
if(G.assailant == affecting && G.affecting == assailant)
G.dancing = 1
G.adjust_position()
dancing = 1
adjust_position()
//Used by throw code to hand over the mob, instead of throwing the grab. The grab is then deleted by the throw code.
/obj/item/grab/proc/throw_held()
if(affecting)
if(affecting.buckled)
return null
if(state >= GRAB_AGGRESSIVE)
animate(affecting, pixel_x = 0, pixel_y = 0, 4, 1)
return affecting
return null
//This makes sure that the grab screen object is displayed in the correct hand.
/obj/item/grab/proc/synch()
if(affecting)
if(assailant.r_hand == src)
hud.screen_loc = ui_rhand
else
hud.screen_loc = ui_lhand
/obj/item/grab/process()
if(QDELING(src)) // GC is trying to delete us, we'll kill our processing so we can cleanly GC
return PROCESS_KILL
confirm()
if(!assailant)
qdel(src) // Same here, except we're trying to delete ourselves.
return PROCESS_KILL
if(assailant.client)
assailant.client.screen -= hud
assailant.client.screen += hud
if(assailant.pulling == affecting)
assailant.stop_pulling()
if(state <= GRAB_AGGRESSIVE)
allow_upgrade = 1
//disallow upgrading if we're grabbing more than one person
if((assailant.l_hand && assailant.l_hand != src && istype(assailant.l_hand, /obj/item/grab)))
var/obj/item/grab/G = assailant.l_hand
if(G.affecting != affecting)
allow_upgrade = 0
if((assailant.r_hand && assailant.r_hand != src && istype(assailant.r_hand, /obj/item/grab)))
var/obj/item/grab/G = assailant.r_hand
if(G.affecting != affecting)
allow_upgrade = 0
//disallow upgrading past aggressive if we're being grabbed aggressively
for(var/obj/item/grab/G in affecting.grabbed_by)
if(G == src) continue
if(G.state >= GRAB_AGGRESSIVE)
allow_upgrade = 0
if(allow_upgrade)
if(state < GRAB_AGGRESSIVE)
hud.icon_state = "reinforce"
else
hud.icon_state = "reinforce1"
else
hud.icon_state = "!reinforce"
if(state >= GRAB_AGGRESSIVE)
affecting.drop_l_hand()
affecting.drop_r_hand()
if(iscarbon(affecting))
handle_eye_mouth_covering(affecting, assailant, assailant.zone_sel.selecting)
if(force_down)
if(affecting.loc != assailant.loc)
force_down = 0
else
affecting.Weaken(4)
if(state >= GRAB_NECK)
affecting.Stun(3)
if(isliving(affecting))
var/mob/living/L = affecting
L.adjustOxyLoss(1)
if(state >= GRAB_KILL)
affecting.stuttering = max(affecting.stuttering, 5) //It will hamper your voice, being choked and all.
affecting.Weaken(7) //Should keep you down unless you get help.
if(ishuman(affecting))
var/mob/living/carbon/human/A = affecting
if(!(A.species.flags & NO_BREATHE))
A.losebreath = max(A.losebreath + 3, 5)
A.adjustOxyLoss(3)
adjust_position()
/obj/item/grab/proc/handle_eye_mouth_covering(mob/living/carbon/target, mob/user, var/target_zone)
var/announce = (target_zone != last_hit_zone) //only display messages when switching between different target zones
last_hit_zone = target_zone
switch(target_zone)
if(BP_MOUTH)
if(announce)
user.visible_message(span("warning", "\The [user] covers [target]'s face!"))
if(target.silent < 3)
target.silent = 3
if(BP_EYES)
if(announce)
assailant.visible_message(span("warning", "[assailant] covers [affecting]'s eyes!"))
if(affecting.eye_blind < 3)
affecting.eye_blind = 3
/obj/item/grab/attack_self()
return s_click(hud)
//Updating pixelshift, position and direction
//Gets called on process, when the grab gets upgraded or the assailant moves
/obj/item/grab/proc/adjust_position()
if(!affecting)
return
if(affecting.buckled)
animate(affecting, pixel_x = 0, pixel_y = 0, 4, 1, LINEAR_EASING)
return
if(affecting.lying && state != GRAB_KILL)
animate(affecting, pixel_x = 0, pixel_y = 0, 5, 1, LINEAR_EASING)
if(force_down)
affecting.set_dir(SOUTH) //face up
return
var/shift = 0
var/adir = get_dir(assailant, affecting)
affecting.layer = 4
switch(state)
if(GRAB_PASSIVE)
shift = 8
if(dancing) //look at partner
shift = 10
assailant.set_dir(get_dir(assailant, affecting))
if(GRAB_AGGRESSIVE)
shift = 12
if(GRAB_NECK, GRAB_UPGRADING)
shift = -10
adir = assailant.dir
affecting.set_dir(assailant.dir)
affecting.forceMove(assailant.loc)
if(GRAB_KILL)
shift = 0
adir = 1
affecting.set_dir(SOUTH) //face up
affecting.forceMove(assailant.loc)
switch(adir)
if(NORTH)
animate(affecting, pixel_x = 0, pixel_y =-shift, 5, 1, LINEAR_EASING)
affecting.layer = 3.9
if(SOUTH)
animate(affecting, pixel_x = 0, pixel_y = shift, 5, 1, LINEAR_EASING)
if(WEST)
animate(affecting, pixel_x = shift, pixel_y = 0, 5, 1, LINEAR_EASING)
if(EAST)
animate(affecting, pixel_x =-shift, pixel_y = 0, 5, 1, LINEAR_EASING)
/obj/item/grab/proc/s_click(obj/screen/S)
if(!affecting)
return
if(state == GRAB_UPGRADING)
return
if(!assailant.canClick())
return
if(!assailant.canmove || assailant.lying)
qdel(src)
return
var/grab_coeff = 1
if(ishuman(affecting))
var/mob/living/carbon/human/H = affecting
if(H.species)
grab_coeff = H.species.grab_mod
if(world.time < (last_action + (UPGRADE_COOLDOWN * grab_coeff)))
return
last_action = world.time
if(state < GRAB_AGGRESSIVE)
if(!allow_upgrade)
return
if(!affecting.lying)
assailant.visible_message(span("warning", "[assailant] grabs [affecting] aggressively by the hands!"))
else
assailant.visible_message(span("warning", "[assailant] pins [affecting] down to the ground by the hands!"))
apply_pinning(affecting, assailant)
state = GRAB_AGGRESSIVE
icon_state = "grabbed1"
hud.icon_state = "reinforce1"
else if(state < GRAB_NECK)
if(isslime(affecting))
to_chat(assailant, span("notice", "You try to squeeze [affecting], but your hands sink right through!"))
return
assailant.visible_message(span("warning", "[assailant] reinforces \his grip on [affecting]'s neck'!"))
state = GRAB_NECK
icon_state = "grabbed+1"
affecting.attack_log += "\[[time_stamp()]\] <font color='orange'>Has had their neck grabbed by [assailant.name] ([assailant.ckey])</font>"
assailant.attack_log += "\[[time_stamp()]\] <font color='red'>Grabbed the neck of [affecting.name] ([affecting.ckey])</font>"
msg_admin_attack("[key_name_admin(assailant)] grabbed the neck of [key_name_admin(affecting)]",ckey=key_name(assailant),ckey_target=key_name(affecting))
hud.icon_state = "kill"
hud.name = "kill"
affecting.Stun(10) //10 ticks of ensured grab
else if(state < GRAB_UPGRADING)
if(ishuman(affecting))
var/mob/living/carbon/human/H = affecting
if(H.head && (H.head.item_flags & AIRTIGHT))
to_chat(assailant, span("warning", "[H]'s headgear prevents you from choking them out!"))
return
hud.icon_state = "kill1"
hud.name = "loosen"
state = GRAB_KILL
assailant.visible_message(span("danger", "[assailant] starts strangling [affecting]!"))
affecting.attack_log += "\[[time_stamp()]\] <font color='orange'>is being strangled by [assailant.name] ([assailant.ckey])</font>"
assailant.attack_log += "\[[time_stamp()]\] <font color='red'>is strangling [affecting.name] ([affecting.ckey])</font>"
msg_admin_attack("[key_name_admin(assailant)] is strangling [key_name_admin(affecting)]",ckey=key_name(assailant),ckey_target=key_name(affecting))
affecting.setClickCooldown(10)
if(ishuman(affecting))
var/mob/living/carbon/human/A = affecting
if (!(A.species.flags & NO_BREATHE))
A.losebreath += 4
affecting.set_dir(WEST)
else if(state == GRAB_KILL)
hud.icon_state = "kill"
hud.name = "kill"
state = GRAB_NECK
assailant.visible_message(span("warning", "[assailant] stops strangling [affecting]!"))
adjust_position()
//This is used to make sure the victim hasn't managed to yackety sax away before using the grab.
/obj/item/grab/proc/confirm()
if(!assailant || !affecting)
qdel(src)
return 0
if(affecting)
if(!isturf(assailant.loc) || ( !isturf(affecting.loc) || assailant.loc != affecting.loc && get_dist(assailant, affecting) > 1) || assailant.z != affecting.z )
qdel(src)
return 0
return 1
/obj/item/grab/attack(mob/M, mob/living/user, var/target_zone)
if(!affecting)
return
if(ishuman(user) && affecting == M)
var/mob/living/carbon/human/H = user
if(H.check_psi_grab(src))
return
if(world.time < (last_action + 20))
return
last_action = world.time
reset_kill_state() //using special grab moves will interrupt choking them
//clicking on the victim while grabbing them
if(M == affecting)
if(ishuman(affecting))
var/hit_zone = target_zone
flick(hud.icon_state, hud)
switch(assailant.a_intent)
if(I_HELP)
if(force_down)
to_chat(assailant, span("warning", "You are no longer pinning [affecting] to the ground."))
force_down = 0
return
inspect_organ(affecting, assailant, hit_zone)
if(I_GRAB)
jointlock(affecting, assailant, hit_zone)
if(I_HURT)
if(hit_zone == BP_EYES)
attack_eye(affecting, assailant)
else if(hit_zone == BP_HEAD)
headbut(affecting, assailant)
else
dislocate(affecting, assailant, hit_zone)
if(I_DISARM)
if(hit_zone != BP_HEAD)
pin_down(affecting, assailant)
if(hit_zone == BP_HEAD)
hair_pull(affecting, assailant)
//clicking on yourself while grabbing them
if(M == assailant && state >= GRAB_AGGRESSIVE)
devour(affecting, assailant)
/obj/item/grab/dropped()
loc = null
if(!destroying)
qdel(src)
/obj/item/grab/proc/reset_kill_state()
if(state == GRAB_KILL)
assailant.visible_message(span("danger", "[assailant] stops strangling [affecting] to move."))
hud.icon_state = "kill"
state = GRAB_NECK
/obj/item/grab
var/destroying = 0
/obj/item/grab/Destroy()
animate(affecting, pixel_x = 0, pixel_y = 0, 4, 1, LINEAR_EASING)
affecting.layer = 4
if(affecting)
ADD_FALLING_ATOM(affecting) // Makes the grabbee check if they can fall.
affecting.grabbed_by -= src
affecting = null
if(assailant)
if(assailant.client)
assailant.client.screen -= hud
assailant = null
qdel(hud)
hud = null
destroying = 1 // stops us calling qdel(src) on dropped()
return ..()
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