Merge pull request #8159 from Poojawa/lizard-hyperoxia

Carbon Oxygen Toxicity

code/modules/mob/living/carbon/carbon_defines.dm

@@ -34,6 +34,7 @@
 	var/failed_last_breath = 0 //This is used to determine if the mob failed a breath. If they did fail a brath, they will attempt to breathe each tick, otherwise just once per 4 ticks.
 
 	var/co2overloadtime = null
+	var/o2overloadtime = null	//for Ash walker's weaker lungs, and future atmosia hazards
 	var/temperature_resistance = T0C+75
 	var/obj/item/reagent_containers/food/snacks/meat/slab/type_of_meat = /obj/item/reagent_containers/food/snacks/meat/slab
 

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

@@ -91,6 +91,7 @@
 	id = "ashlizard"
 	limbs_id = "lizard"
 	species_traits = list(MUTCOLORS,EYECOLOR,LIPS,DIGITIGRADE)
-	inherent_traits = list(TRAIT_NOGUNS,TRAIT_NOBREATH)
+	inherent_traits = list(TRAIT_NOGUNS)
+	mutantlungs = /obj/item/organ/lungs/ashwalker
 	burnmod = 0.9
 	brutemod = 0.9

code/modules/mob/living/carbon/life.dm

@@ -141,6 +141,7 @@
 		return 0
 
 	var/safe_oxy_min = 16
+	var/safe_oxy_max = 50
 	var/safe_co2_max = 10
 	var/safe_tox_max = 0.05
 	var/SA_para_min = 1
@@ -156,6 +157,19 @@
 
 
 	//OXYGEN
+	if(O2_partialpressure > safe_oxy_max) // Too much Oxygen - blatant CO2 effect copy/pasta
+		if(!o2overloadtime)
+			o2overloadtime = world.time
+		else if(world.time - o2overloadtime > 120)
+			Dizzy(10)	// better than a minute of you're fucked KO, but certainly a wake up call. Honk.
+			adjustOxyLoss(3)
+			if(world.time - o2overloadtime > 300)
+				adjustOxyLoss(8)
+		if(prob(20))
+			emote("cough")
+		throw_alert("too_much_oxy", /obj/screen/alert/too_much_oxy)
+		SEND_SIGNAL(src, COMSIG_ADD_MOOD_EVENT, "suffocation", /datum/mood_event/suffocation)
+
 	if(O2_partialpressure < safe_oxy_min) //Not enough oxygen
 		if(prob(20))
 			emote("gasp")
@@ -172,6 +186,7 @@
 
 	else //Enough oxygen
 		failed_last_breath = 0
+		o2overloadtime = 0 //reset our counter for this too
 		if(health >= crit_threshold)
 			adjustOxyLoss(-5)
 		oxygen_used = breath_gases[/datum/gas/oxygen][MOLES]