Tyrant tweaks (#19371)

Added some notifications of proximity to the plains tyrant.
Reduced health and auto-brute-healing of the plains tyrant.
Fixed traps pathing so that mobs should now pass in them.
Optimized SA_attackable proc.
Mechs are no longer opaque, this fixes the simplemobs not attacking them
(because the line of sight check fails as the turf they stand on is
opaque if they are opaque too) as well as avoid lighting recomputing on
every step.

---------

Signed-off-by: Fluffy <65877598+FluffyGhoster@users.noreply.github.com>
Co-authored-by: Matt Atlas <mattiathebest2000@hotmail.it>

code/modules/heavy_vehicle/mecha.dm

@@ -2,7 +2,6 @@
 /mob/living/heavy_vehicle
 	name = "exosuit"
 	density = TRUE
-	opacity = TRUE
 	anchored = TRUE
 	status_flags = PASSEMOTES
 	a_intent = I_HURT

code/modules/mob/living/simple_animal/hostile/moghes.dm

@@ -19,8 +19,8 @@
 	response_disarm = "shoves"
 	response_harm   = "harmlessly punches"
 	blood_overlay_icon = null
-	maxHealth = 500
-	health = 500
+	maxHealth = 400
+	health = 400
 	harm_intent_damage = 0
 	melee_damage_lower = 40
 	melee_damage_upper = 40
@@ -49,7 +49,34 @@
 
 /mob/living/simple_animal/hostile/biglizard/Life()
 	..()
-	adjustBruteLoss(-5)
+
+	//It's a predator, supposedly it shouldn't always alert his victims to be nearby
+	//(also saves some processing)
+	if(prob(30))
+		for(var/mob/living/poor_soul_approaching in get_hearers_in_range(world.view*1.8, src))
+			//No point in sending a message if there's no client
+			if(!poor_soul_approaching.client)
+				continue
+
+			var/message
+
+			var/poor_soul_distance_from_tyrant = get_dist(src, poor_soul_approaching)
+			//They can see us, no point
+			if(poor_soul_distance_from_tyrant <= world.view)
+				continue
+
+			//RUN FOR YOUR LIFE
+			else if(poor_soul_distance_from_tyrant <= world.view*1.4)
+				message = SPAN_HIGHDANGER(SPAN_BOLD("You hear loud stomping nearby!"))
+
+			//Fairly close, a normal warning should suffice
+			else
+				message = SPAN_DANGER("You hear a bone-chilling roar in the distance!")
+
+			poor_soul_approaching.notify_message(message, 10 SECONDS, key = "biglizard-[REF(src)]")
+
+
+	adjustBruteLoss(-1)
 
 /mob/living/simple_animal/hostile/biglizard/verb/devour(mob/living/target as mob in oview())
 	set category = "Plains Tyrant"

code/modules/mob/living/simple_animal/simple_animal.dm

@@ -741,21 +741,22 @@
 	apply_damage(damage, DAMAGE_BRUTE, damage_flags = DAMAGE_FLAG_EXPLODE)
 
 /mob/living/simple_animal/proc/SA_attackable(target_mob)
-	if (isliving(target_mob))
+	if(isliving(target_mob))
 		var/mob/living/L = target_mob
 		if(!L.stat)
-			return (0)
-	if (istype(target_mob, /obj/machinery/bot))
+			return FALSE
+	else if(istype(target_mob, /obj/machinery/bot))
 		var/obj/machinery/bot/B = target_mob
 		if(B.health > 0)
-			return (0)
-	if(istype(target_mob, /obj/machinery/porta_turret/))
+			return FALSE
+	else if(istype(target_mob, /obj/machinery/porta_turret))
 		var/obj/machinery/porta_turret/T = target_mob
 		if(T.health > 0)
-			return (0)
-	if(istype(target_mob, /obj/effect/energy_field))
-		return (0)
-	return 1
+			return FALSE
+	else if(istype(target_mob, /obj/effect/energy_field))
+		return FALSE
+
+	return TRUE
 
 /mob/living/simple_animal/proc/make_noise(var/make_sound = TRUE)
 	set name = "Make Sound"