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first pass
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@morrowwolf
morrowwolf committed Oct 27, 2023
1 parent 593ea10 commit 654dc3e
Showing 1 changed file with 86 additions and 88 deletions.
174 changes: 86 additions & 88 deletions code/modules/mob/living/carbon/xenomorph/ai/movement/lurker.dm
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Original file line number Diff line number Diff line change
Expand Up @@ -3,18 +3,14 @@
// Are we currently hiding?
var/ai_lurking = FALSE

// Should we stalk people when they walk too far away?
var/enable_stalking = FALSE

// Gradually increases the chance of AI to try and bait marines
// Annoyance accumulate when we lurk (stand invisible) and aware of our target
// Gradually increases the chance of AI to try and bait marines, annoyance accumulate when we lurk (stand invisible) and aware of our target
var/annoyance = 0

// Total baits this xeno made
// Total baits this xeno has made
var/total_baits = 0

// Distance at which we want to stay from our spotted target
var/stalking_distance = 12
var/stalking_distance = 10

// List of turfs we see and register while lurking
var/list/registered_turfs = list()
Expand All @@ -28,10 +24,6 @@

/datum/xeno_ai_movement/linger/lurking/New(mob/living/carbon/xenomorph/parent)
. = ..()
var/datum/action/xeno_action/activable/pounce/lurker/LPA = get_xeno_action_by_type(parent, /datum/action/xeno_action/activable/pounce/lurker)
if (LPA && istype(LPA))
LPA.knockdown = TRUE // pounce knocks down
LPA.freeze_self = TRUE

RegisterSignal(parent, COMSIG_MOVABLE_MOVED, PROC_REF(stop_lurking))
addtimer(CALLBACK(src, PROC_REF(check_annoyance)), AI_CHECK_ANNOYANCE_COOLDOWN, TIMER_UNIQUE|TIMER_LOOP|TIMER_DELETE_ME)
Expand All @@ -43,63 +35,67 @@
if(idle_xeno.throwing)
return

if(next_home_search < world.time && (!home_turf || get_dist(home_turf, idle_xeno) > max_distance_from_home))
var/turf/T = get_turf(idle_xeno.loc)
next_home_search = world.time + home_search_delay
var/shortest_distance = INFINITY
for(var/i in shuffle(RANGE_TURFS(home_locate_range, T)))
var/turf/potential_home = i
var/lets_continue
if(home_turf)
if(get_dist(home_turf, idle_xeno) <= 0)
start_lurking()
return

var/mob/living/carbon/xenomorph/blocking_xeno = locate() in potential_home
if(blocking_xeno && blocking_xeno.stat == CONSCIOUS && blocking_xeno != idle_xeno)
continue
if(!idle_xeno.move_to_next_turf(home_turf))
home_turf = null
return

var/atom/target = idle_xeno.current_target
if(target && potential_home != T && (potential_home in view(world.view, target)))
continue // We prefer standing still when someone can see us
return

if(!potential_home.density && get_dist(idle_xeno, potential_home) < shortest_distance)
shortest_distance = get_dist(idle_xeno, potential_home)
if(next_home_search > world.time)
return

/// First we try to locate some structures to stand and hide on
for(var/obj/structure/S in potential_home)
if(S && !istype(S, /obj/structure/pipes)) // Don't care if it's dense cause we can break it and hide on remains
home_turf = potential_home
lets_continue = TRUE
break
var/turf/current_turf = get_turf(idle_xeno)

if(lets_continue)
continue
if(!current_turf)
return

/// If we cannot find any structures, we look for walls around our potential home
for(var/turf/t_around in orange(1, potential_home))
if(t_around && t_around.density) // Let's find a wall to stick to it
home_turf = potential_home
shortest_distance += 5 // Penalty for no structures, we can do better
lets_continue = TRUE
break
next_home_search = world.time + home_search_delay
var/shortest_distance = INFINITY
var/turf/non_preferred_turf
for(var/turf/potential_home as anything in shuffle(RANGE_TURFS(home_locate_range, current_turf)))

if(lets_continue)
continue
var/blocked = FALSE
for(var/atom/potential_blocker as anything in potential_home)
if(potential_blocker.can_block_movement)
blocked = TRUE
break

/// If we have no structures or walls to stick to (strange), just hide on closest turf
home_turf = potential_home
shortest_distance += 10 // Penalty for empty turfs (we don't wanna hide on them)
if(blocked)
continue

if(!home_turf)
return
var/preferred = FALSE
for(var/turf/closed/touching_turf in orange(1, potential_home))
preferred = TRUE
break

/// Abandon hiding place to stalk our target
if(idle_xeno.current_target && get_dist(home_turf, idle_xeno.current_target) > stalking_distance && enable_stalking)
home_turf = null
return
if(idle_xeno.current_target)
var/potential_home_dir = get_dir(idle_xeno, potential_home)
var/current_target_dir = get_dir(idle_xeno, idle_xeno.current_target)

if(idle_xeno.move_to_next_turf(home_turf, home_locate_range))
if(get_dist(home_turf, idle_xeno) <= 0 && !ai_lurking)
start_lurking()
else
home_turf = null
if(current_target_dir != potential_home_dir && current_target_dir != turn(potential_home_dir, 45) && current_target_dir != turn(potential_home_dir, -45))
continue

var/xeno_to_potential_home_distance = get_dist(idle_xeno, potential_home)
if(xeno_to_potential_home_distance > shortest_distance)
continue

if(preferred)
home_turf = potential_home
shortest_distance = xeno_to_potential_home_distance
continue

if(xeno_to_potential_home_distance < get_dist(idle_xeno, non_preferred_turf))
non_preferred_turf = potential_home
continue

if(!home_turf)
home_turf = non_preferred_turf
return

/datum/xeno_ai_movement/linger/lurking/ai_move_target(delta_time)
var/mob/living/carbon/xenomorph/moving_xeno = parent
Expand All @@ -111,7 +107,8 @@

var/turf/target_turf = get_turf(moving_xeno.current_target)
if(ai_lurking || get_dist(moving_xeno, target_turf) > world.view + 2)
if(get_dist(moving_xeno, target_turf) > stalking_distance && enable_stalking)
if(get_dist(moving_xeno, target_turf) > stalking_distance)
home_turf = null
return moving_xeno.move_to_next_turf(target_turf)
return ai_move_idle(delta_time)

Expand All @@ -127,15 +124,11 @@
if(!annoyed_xeno.current_target || !ai_lurking)
return

if(annoyed_xeno.current_target in view(world.view, annoyed_xeno))
return

annoyance++

if(prob(annoyance))
try_bait()


#define LURKER_BAIT_TYPES list("Taunt","Emote","Interact")
#define LURKER_BAIT_EMOTES list("growl","roar","hiss","needshelp")
#define LURKER_BAIT_TAUNTS list("Come here, little host","I won't bite","I see you","Safe to go, little one")
Expand Down Expand Up @@ -187,45 +180,50 @@
return TRUE
return FALSE


/datum/xeno_ai_movement/linger/lurking/proc/start_lurking()
SIGNAL_HANDLER
if(!ai_lurking)
var/mob/living/carbon/xenomorph/lurking_xeno = parent
animate(lurking_xeno, alpha = 20, time = 0.5 SECONDS, easing = QUAD_EASING)
lurking_xeno.set_movement_intent(MOVE_INTENT_WALK)
register_turf_signals()
ai_lurking = TRUE
if(ai_lurking)
return

var/datum/action/xeno_action/activable/pounce/lurker/LPA = get_xeno_action_by_type(lurking_xeno, /datum/action/xeno_action/activable/pounce/lurker)
if(LPA && istype(LPA))
LPA.knockdown = TRUE // pounce knocks down again
LPA.freeze_self = TRUE
var/mob/living/carbon/xenomorph/lurking_xeno = parent
animate(lurking_xeno, alpha = 20, time = 0.5 SECONDS, easing = QUAD_EASING)
lurking_xeno.set_movement_intent(MOVE_INTENT_WALK)
register_turf_signals()
ai_lurking = TRUE

var/datum/action/xeno_action/activable/pounce/lurker/LPA = get_xeno_action_by_type(lurking_xeno, /datum/action/xeno_action/activable/pounce/lurker)
if(LPA && istype(LPA))
LPA.knockdown = TRUE
LPA.freeze_self = TRUE

/datum/xeno_ai_movement/linger/lurking/proc/stop_lurking()
SIGNAL_HANDLER
if(ai_lurking)
var/mob/living/carbon/xenomorph/lurking_xeno = parent
animate(lurking_xeno, alpha = initial(lurking_xeno.alpha), time = 0.2 SECONDS, easing = QUAD_EASING)
lurking_xeno.set_movement_intent(MOVE_INTENT_RUN)
unregister_turf_signals()
ai_lurking = FALSE
if(!ai_lurking)
return

INVOKE_ASYNC(lurking_xeno, TYPE_PROC_REF(/mob, stop_pulling))
var/mob/living/carbon/xenomorph/lurking_xeno = parent
animate(lurking_xeno, alpha = initial(lurking_xeno.alpha), time = 0.2 SECONDS, easing = QUAD_EASING)
lurking_xeno.set_movement_intent(MOVE_INTENT_RUN)
unregister_turf_signals()
ai_lurking = FALSE

INVOKE_ASYNC(lurking_xeno, TYPE_PROC_REF(/mob, stop_pulling))

/datum/xeno_ai_movement/linger/lurking/proc/register_turf_signals()
for(var/turf/open/OT in view(world.view, parent))
RegisterSignal(OT, COMSIG_TURF_ENTERED, PROC_REF(set_target), override = TRUE)
registered_turfs += OT
for(var/turf/open/cycled_open_turf in view(5, parent))
RegisterSignal(cycled_open_turf, COMSIG_TURF_ENTERED, PROC_REF(set_target))
registered_turfs += cycled_open_turf

/datum/xeno_ai_movement/linger/lurking/proc/unregister_turf_signals()
for(var/turf/open/OT in registered_turfs)
UnregisterSignal(OT, COMSIG_TURF_ENTERED)
for(var/turf/open/cycled_open_turf in registered_turfs)
UnregisterSignal(cycled_open_turf, COMSIG_TURF_ENTERED)
registered_turfs.Cut()

/datum/xeno_ai_movement/linger/lurking/proc/set_target(turf/hooked, atom/movable/subject)
/datum/xeno_ai_movement/linger/lurking/proc/set_target(turf/hooked, atom/movable/entering_atom)
SIGNAL_HANDLER
var/mob/living/carbon/xenomorph/lurking_xeno = parent
if(subject in GLOB.alive_human_list)
lurking_xeno.current_target = subject

if(!istype(entering_atom, /mob/living/carbon/human))
return

lurking_xeno.current_target = entering_atom

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