Zombies can heal in stasis

code/__DEFINES/traits/declarations.dm

@@ -94,6 +94,8 @@ Remember to update _globalvars/traits.dm if you're adding/removing/renaming trai
 #define TRAIT_NOSLIPWATER		"noslip_water"
 /// Stops all slipping and sliding from ocurring
 #define TRAIT_NOSLIPALL "noslip_all"
+//Inherent trait preventing effects of stasis on a mob
+#define TRAIT_NOSTASIS "no_stasis"
 
 /// Unlinks gliding from movement speed, meaning that there will be a delay between movements rather than a single move movement between tiles
 #define TRAIT_NO_GLIDE "no_glide"

code/_globalvars/traits/_traits.dm

@@ -58,6 +58,7 @@ GLOBAL_LIST_INIT(traits_by_type, list(
 		"TRAIT_NOMETABOLISM" = TRAIT_NOMETABOLISM,
 		"TRAIT_POWERHUNGRY" = TRAIT_POWERHUNGRY,
 		"TRAIT_NOCLONELOSS" = TRAIT_NOCLONELOSS,
+		"TRAIT_NOSTASIS" = TRAIT_NOSTASIS,
 		"TRAIT_TOXIMMUNE" = TRAIT_TOXIMMUNE,
 		"TRAIT_EASYDISMEMBER" = TRAIT_EASYDISMEMBER,
 		"TRAIT_LIMBATTACHMENT" = TRAIT_LIMBATTACHMENT,

code/game/machinery/stasis.dm

@@ -122,6 +122,9 @@
 		return
 	var/freq = rand(24750, 26550)
 	playsound(src, 'sound/effects/spray.ogg', 5, TRUE, 2, frequency = freq)
+	//we could check inherent_traits, but thats too many var defines. KISS principle.
+	if(HAS_TRAIT(target, TRAIT_NOSTASIS))
+		return
 	target.apply_status_effect(STATUS_EFFECT_STASIS, STASIS_MACHINE_EFFECT)
 	target.ExtinguishMob()
 	use_power = ACTIVE_POWER_USE
@@ -146,7 +149,7 @@
 	update_icon()
 
 /obj/machinery/stasis/process()
-	if( !( occupant && isliving(occupant) && check_nap_violations() ) )
+	if(!(occupant && isliving(occupant) && check_nap_violations()))
 		use_power = IDLE_POWER_USE
 		return
 	var/mob/living/L_occupant = occupant

code/modules/mob/living/carbon/human/species_types/zombies.dm

@@ -6,13 +6,35 @@
 	id = "zombie"
 	sexes = 0
 	meat = /obj/item/food/meat/slab/human/mutant/zombie
-	species_traits = list(NOBLOOD,NOZOMBIE,NOTRANSSTING)
-	inherent_traits = list(TRAIT_TOXIMMUNE,TRAIT_RESISTCOLD,TRAIT_RESISTHIGHPRESSURE,TRAIT_RESISTLOWPRESSURE,TRAIT_RADIMMUNE,TRAIT_EASYDISMEMBER,\
-	TRAIT_LIMBATTACHMENT,TRAIT_NOBREATH,TRAIT_NODEATH,TRAIT_FAKEDEATH,TRAIT_NOCLONELOSS, TRAIT_FAST_CUFF_REMOVAL)
+	species_traits = list(
+		NOBLOOD,
+		NOZOMBIE,
+		NOTRANSSTING
+	)
+	inherent_traits = list(
+		TRAIT_EASYDISMEMBER,
+		TRAIT_FAKEDEATH,
+		TRAIT_FAST_CUFF_REMOVAL,
+		TRAIT_LIMBATTACHMENT,
+		TRAIT_NOBREATH,
+		TRAIT_NOCLONELOSS,
+		TRAIT_NODEATH,
+		TRAIT_NOHUNGER,
+		TRAIT_NOMETABOLISM,
+		TRAIT_RADIMMUNE,
+		TRAIT_RESISTCOLD,
+		TRAIT_RESISTHIGHPRESSURE,
+		TRAIT_RESISTLOWPRESSURE,
+		TRAIT_TOXIMMUNE,
+		TRAIT_NOSTASIS
+	)
 	inherent_biotypes = list(MOB_UNDEAD, MOB_HUMANOID)
 	mutanttongue = /obj/item/organ/tongue/zombie
 	var/static/list/spooks = list('sound/hallucinations/growl1.ogg','sound/hallucinations/growl2.ogg','sound/hallucinations/growl3.ogg','sound/hallucinations/veryfar_noise.ogg','sound/hallucinations/wail.ogg')
 	changesource_flags = MIRROR_BADMIN | WABBAJACK | MIRROR_PRIDE | MIRROR_MAGIC | ERT_SPAWN
+	bodytemp_normal = T0C // They have no natural body heat, the environment regulates body temp
+	bodytemp_heat_damage_limit = FIRE_MINIMUM_TEMPERATURE_TO_EXIST // Take damage at fire temp
+	bodytemp_cold_damage_limit = MINIMUM_TEMPERATURE_TO_MOVE // take damage below minimum movement temp
 
 	species_chest = /obj/item/bodypart/chest/zombie
 	species_head = /obj/item/bodypart/head/zombie
@@ -21,10 +43,6 @@
 	species_l_leg = /obj/item/bodypart/l_leg/zombie
 	species_r_leg = /obj/item/bodypart/r_leg/zombie
 
-	bodytemp_normal = T0C // They have no natural body heat, the environment regulates body temp
-	bodytemp_heat_damage_limit = FIRE_MINIMUM_TEMPERATURE_TO_EXIST // Take damage at fire temp
-	bodytemp_cold_damage_limit = MINIMUM_TEMPERATURE_TO_MOVE // take damage below minimum movement temp
-
 /datum/species/zombie/check_roundstart_eligible()
 	if(SSevents.holidays && SSevents.holidays[HALLOWEEN])
 		return TRUE
@@ -44,9 +62,9 @@
 	armor = 20 // 120 damage to KO a zombie, which kills it
 	speedmod = 1.6
 	mutanteyes = /obj/item/organ/eyes/night_vision/zombie
-	var/heal_rate = 1
-	var/regen_cooldown = 0
 	changesource_flags = MIRROR_BADMIN | WABBAJACK | ERT_SPAWN
+	var/heal_rate = 1
+	COOLDOWN_DECLARE(regen_cooldown)
 
 	/// Zombies do not stabilize body temperature they are the walking dead and are cold blooded
 /datum/species/zombie/body_temperature_core(mob/living/carbon/human/humi)
@@ -61,15 +79,15 @@
 /datum/species/zombie/infectious/apply_damage(damage, damagetype = BRUTE, def_zone = null, blocked, mob/living/carbon/human/H, forced = FALSE)
 	. = ..()
 	if(.)
-		regen_cooldown = world.time + REGENERATION_DELAY
+		COOLDOWN_START(src, regen_cooldown, REGENERATION_DELAY)
 
 /datum/species/zombie/infectious/spec_life(mob/living/carbon/C)
 	. = ..()
 	C.a_intent = INTENT_HARM // THE SUFFERING MUST FLOW
 
 	//Zombies never actually die, they just fall down until they regenerate enough to rise back up.
 	//They must be restrained, beheaded or gibbed to stop being a threat.
-	if(regen_cooldown < world.time)
+	if(COOLDOWN_FINISHED(src, regen_cooldown))
 		var/heal_amt = heal_rate
 		if(HAS_TRAIT(C, TRAIT_CRITICAL_CONDITION))
 			heal_amt *= 2