Minor ZAS-related cleanup

code/ZAS/Atom.dm

@@ -50,7 +50,7 @@ atom/proc/c_airblock(turf/other)
 	#ifdef ZASDBG
 	ASSERT(isturf(other))
 	#endif
-	return !CanPass(null, other, 0, 0) + 2*!CanPass(null, other, 1.5, 1)
+	return (AIR_BLOCKED*!CanPass(null, other, 0, 0))|(ZONE_BLOCKED*!CanPass(null, other, 1.5, 1))
 
 
 turf/c_airblock(turf/other)

code/ZAS/Turf.dm

@@ -46,6 +46,7 @@
 				air_master.connect(sim, src)
 
 /turf/simulated/update_air_properties()
+
 	if(zone && zone.invalid)
 		c_copy_air()
 		zone = null //Easier than iterating through the list at the zone.
@@ -120,8 +121,10 @@
 				//Might have assigned a zone, since this happens for each direction.
 				if(!zone)
 
-					//if((block & ZONE_BLOCKED) || (r_block & ZONE_BLOCKED && !(s_block & ZONE_BLOCKED)))
+					//We do not merge if 
-					if(((block & ZONE_BLOCKED) && !(r_block & ZONE_BLOCKED)) || (r_block & ZONE_BLOCKED && !(s_block & ZONE_BLOCKED)))
+					//    they are blocking us and we are not blocking them, or if
+					//    we are blocking them and not blocking ourselves - this prevents tiny zones from forming on doorways.
+					if(((block & ZONE_BLOCKED) && !(r_block & ZONE_BLOCKED)) || ((r_block & ZONE_BLOCKED) && !(s_block & ZONE_BLOCKED)))
 						#ifdef ZASDBG
 						if(verbose) world << "[d] is zone blocked."
 						//dbg(zone_blocked, d)

code/__HELPERS/unsorted.dm

@@ -922,30 +922,6 @@ proc/anim(turf/location as turf,target as mob|obj,a_icon,a_icon_state as text,fl
 					refined_trg -= B
 					continue moving
 
-	var/list/doors = new/list()
-
-	if(toupdate.len)
-		for(var/turf/simulated/T1 in toupdate)
-			for(var/obj/machinery/door/D2 in T1)
-				doors += D2
-			/*if(T1.parent)
-				air_master.groups_to_rebuild += T1.parent
-			else
-				air_master.tiles_to_update += T1*/
-
-	if(fromupdate.len)
-		for(var/turf/simulated/T2 in fromupdate)
-			for(var/obj/machinery/door/D2 in T2)
-				doors += D2
-			/*if(T2.parent)
-				air_master.groups_to_rebuild += T2.parent
-			else
-				air_master.tiles_to_update += T2*/
-
-	for(var/obj/O in doors)
-		O:update_nearby_tiles(1)
-
-
 
 proc/DuplicateObject(obj/original, var/perfectcopy = 0 , var/sameloc = 0)
 	if(!original)

code/game/turfs/turf.dm

@@ -227,12 +227,6 @@
 		if(S.zone) S.zone.rebuild()
 
 	if(ispath(N, /turf/simulated/floor))
-		//if the old turf had a zone, connect the new turf to it as well - Cael
-		//Adjusted by SkyMarshal 5/10/13 - The air master will handle the addition of the new turf.
-		//if(zone)
-		//	zone.RemoveTurf(src)
-		//	if(!zone.CheckStatus())
-		//		zone.SetStatus(ZONE_ACTIVE)
 
 		var/turf/simulated/W = new N( locate(src.x, src.y, src.z) )
 		//W.Assimilate_Air()
@@ -249,7 +243,7 @@
 			W.RemoveLattice()
 
 		if(air_master)
-			air_master.mark_for_update(src)
+			air_master.mark_for_update(src) //handle the addition of the new turf.
 
 		for(var/turf/space/S in range(W,1))
 			S.update_starlight()
@@ -258,10 +252,6 @@
 		return W
 
 	else
-		//if(zone)
-		//	zone.RemoveTurf(src)
-		//	if(!zone.CheckStatus())
-		//		zone.SetStatus(ZONE_ACTIVE)
 
 		var/turf/W = new N( locate(src.x, src.y, src.z) )
 		W.lighting_lumcount += old_lumcount