Merge pull request #5423 from Anewbe/dirt_floors

Implements ways to make floors not get dirty

code/game/turfs/simulated.dm

@@ -12,6 +12,7 @@
 	nitrogen = MOLES_N2STANDARD
 	var/to_be_destroyed = 0 //Used for fire, if a melting temperature was reached, it will be destroyed
 	var/max_fire_temperature_sustained = 0 //The max temperature of the fire which it was subjected to
+	var/can_dirty = TRUE	// If false, tile never gets dirty
 	var/dirt = 0
 
 // This is not great.
@@ -65,6 +66,7 @@
 	tracks.AddTracks(bloodDNA,comingdir,goingdir,bloodcolor)
 
 /turf/simulated/proc/update_dirt()
+	if(can_dirty)
 		dirt = min(dirt+1, 101)
 		var/obj/effect/decal/cleanable/dirt/dirtoverlay = locate(/obj/effect/decal/cleanable/dirt, src)
 		if (dirt > 50)
@@ -82,6 +84,7 @@
 		if(M.lying)
 			return ..()
 
+		if(M.dirties_floor())
 			// Dirt overlays.
 			update_dirt()
 

code/modules/mob/living/living.dm

@@ -1278,3 +1278,7 @@ default behaviour is:
 
 /mob/living/proc/has_vision()
 	return !(eye_blind || (disabilities & BLIND) || stat || blinded)
+
+
+/mob/living/proc/dirties_floor()	// If we ever decide to add fancy conditionals for making dirty floors (floating, etc), here's the proc.
+	return makes_dirt

code/modules/mob/living/living_defines.dm

@@ -16,7 +16,6 @@
 	var/brainloss = 0	//'Retardation' damage caused by someone hitting you in the head with a bible or being infected with brainrot.
 	var/halloss = 0		//Hallucination damage. 'Fake' damage obtained through hallucinating or the holodeck. Sleeping should cause it to wear off.
 
-
 	var/hallucination = 0 //Directly affects how long a mob will hallucinate for
 	var/list/atom/hallucinations = list() //A list of hallucinated people that try to attack the mob. See /obj/effect/fake_attacker in hallucinations.dm
 
@@ -59,3 +58,5 @@
 
 	var/list/hud_list		//Holder for health hud, status hud, wanted hud, etc (not like inventory slots)
 	var/has_huds = FALSE	//Whether or not we should bother initializing the above list
+
+	var/makes_dirt = TRUE	//FALSE if the mob shouldn't be making dirt on the ground when it walks