Make catwalks unsimulated. Fixes #403.

code/game/turfs/simulated/floor_types.dm

@@ -260,7 +260,7 @@
 
 // CATWALKS
 // Space and plating, all in one buggy fucking turf!
-/turf/simulated/floor/plating/airless/catwalk
+/turf/unsimulated/floor/airless/catwalk
 	icon = 'icons/turf/catwalks.dmi'
 	icon_state = "catwalk0"
 	name = "catwalk"
@@ -273,13 +273,15 @@
 	lighting_lumcount = 4		//starlight
 	accepts_lighting=0 			// Don't apply overlays
 
+	intact = 0
+
 	New()
 		..()
 		// Fucking cockshit dickfuck shitslut
 		name = "catwalk"
 		update_icon(1)
 
-	update_icon(var/propogate=1)
+	proc/update_icon(var/propogate=1)
 		underlays.Cut()
 		underlays += new /icon('icons/turf/space.dmi',"[((x + y) ^ ~(x * y) + z) % 25]")
 
@@ -287,54 +289,20 @@
 		for(var/direction in cardinal)
 			var/turf/T = get_step(src,direction)
 			if(T.is_catwalk())
-				var/turf/simulated/floor/plating/airless/catwalk/C=T
+				var/turf/unsimulated/floor/airless/catwalk/C=T
 				dirs |= direction
 				if(propogate)
 					C.update_icon(0)
 		icon_state="catwalk[dirs]"
 
+
+	attackby(obj/item/C as obj, mob/user as mob)
+		if(!C || !user)
+			return 0
+		if(istype(C, /obj/item/weapon/screwdriver))
+			ReplaceWithLattice()
+			playsound(src, 'sound/items/Screwdriver.ogg', 80, 1)
+			return
+
 	is_catwalk()
-		return 1
-
-	/** ACT UNSIMULATED! **/
-	assume_air(datum/gas_mixture/giver) //use this for machines to adjust air
-		del(giver)
-		return 0
-
-	return_air()
-		//Create gas mixture to hold data for passing
-		var/datum/gas_mixture/GM = new
-
-		GM.oxygen = oxygen
-		GM.carbon_dioxide = carbon_dioxide
-		GM.nitrogen = nitrogen
-		GM.toxins = toxins
-
-		GM.temperature = temperature
-		GM.update_values()
-
-		return GM
-
-	// For new turfs
-	copy_air_from(var/turf/T)
-		oxygen = T.oxygen
-		carbon_dioxide = T.carbon_dioxide
-		nitrogen = T.nitrogen
-		toxins = T.toxins
-
-		temperature = T.temperature
-
-	remove_air(amount as num)
-		var/datum/gas_mixture/GM = new
-
-		var/sum = oxygen + carbon_dioxide + nitrogen + toxins
-		if(sum>0)
-			GM.oxygen = (oxygen/sum)*amount
-			GM.carbon_dioxide = (carbon_dioxide/sum)*amount
-			GM.nitrogen = (nitrogen/sum)*amount
-			GM.toxins = (toxins/sum)*amount
-
-		GM.temperature = temperature
-		GM.update_values()
-
-		return GM
+		return 1

code/game/turfs/space/space.dm

@@ -45,7 +45,7 @@
 				playsound(src, 'sound/weapons/Genhit.ogg', 50, 1)
 				user << "\blue You build a catwalk!"
 				R.use(2)
-				ChangeTurf(/turf/simulated/floor/plating/airless/catwalk)
+				ChangeTurf(/turf/unsimulated/floor/airless/catwalk)
 				del(L)
 				return