Merge pull request #4306 from Lohikar/movable_sanity

changes:

ZAS knockdown is now only applied to movables that are within 16 tiles of one of the edge's turfs. There's probably faster ways to do this, but this should be fine for now.
Fixes #2917.

code/ZAS/Airflow.dm

@@ -133,13 +133,21 @@ mob/living/carbon/human/airflow_hit(atom/A)
 		Stun(round(airflow_speed * vsc.airflow_stun/2))
 	. = ..()
 
-zone/proc/movables()
+zone/proc/movables(list/origins)
 	. = list()
-	for(var/turf/T in contents)
-		CHECK_TICK
+	if (!origins || !origins.len)
+		return
 
-		for(var/aa in T)
-			var/atom/movable/A = aa
-			if(!A.simulated || A.anchored || istype(A, /obj/effect) || istype(A, /mob/abstract/eye))
-				continue
-			. += A
+	var/static/list/movables_tcache = typecacheof(list(/obj/effect, /mob/abstract))
+
+	var/atom/movable/AM
+	for (var/testing_turf in contents)
+		for (var/am in testing_turf)
+			AM = am
+			if (AM.simulated && !AM.anchored && !movables_tcache[AM.type])
+				for (var/source_turf in origins)
+					if (get_dist(testing_turf, source_turf) <= EDGE_KNOCKDOWN_MAX_DISTANCE)
+						.[AM] = TRUE
+						break
+
+					CHECK_TICK

code/ZAS/ConnectionGroup.dm

@@ -169,11 +169,11 @@ Class Procs:
 		var/list/attracted
 		var/list/repelled
 		if(differential > 0)
-			attracted = A.movables()
-			repelled = B.movables()
+			attracted = A.movables(connecting_turfs)
+			repelled = B.movables(connecting_turfs)
 		else
-			attracted = B.movables()
-			repelled = A.movables()
+			attracted = B.movables(connecting_turfs)
+			repelled = A.movables(connecting_turfs)
 
 		// These are async, with waitfor = FALSE
 		flow(attracted, abs(differential), 0)
@@ -239,7 +239,7 @@ Class Procs:
 
 	var/differential = A.air.return_pressure() - air.return_pressure()
 	if(abs(differential) >= vsc.airflow_lightest_pressure)
-		var/list/attracted = A.movables()
+		var/list/attracted = A.movables(connecting_turfs)
 		// This call is async, with waitfor = FALSE
 		flow(attracted, abs(differential), differential < 0)