Merge pull request #6712 from Mloc/bs12-overflow

fix an issue with ZAS geometry not re-forming

code/ZAS/Atom.dm

@@ -47,7 +47,7 @@ turf/c_airblock(turf/other)
 	#ifdef ZASDBG
 	ASSERT(isturf(other))
 	#endif
-	if(blocks_air)
+	if(blocks_air || other.blocks_air)
 		return BLOCKED
 
 	//Z-level handling code. Always block if there isn't an open space.

code/ZAS/Connection.dm

@@ -76,11 +76,15 @@ Class Procs:
 		edge.add_connection(src)
 
 /connection/proc/mark_direct()
-	state |= CONNECTION_DIRECT
+	if(!direct())
+		state |= CONNECTION_DIRECT
+		edge.direct++
 	//world << "Marked direct."
 
 /connection/proc/mark_indirect()
-	state &= ~CONNECTION_DIRECT
+	if(direct())
+		state &= ~CONNECTION_DIRECT
+		edge.direct--
 	//world << "Marked indirect."
 
 /connection/proc/mark_space()
@@ -110,10 +114,9 @@ Class Procs:
 		erase()
 		return
 	else if(block_status & ZONE_BLOCKED)
-		if(direct())
-			mark_indirect()
-		else
-			mark_direct()
+		mark_indirect()
+	else
+		mark_direct()
 
 	var/b_is_space = !istype(B,/turf/simulated)
 

code/ZAS/ConnectionGroup.dm

@@ -61,6 +61,7 @@ Class Procs:
 /connection_edge/var/zone/A
 
 /connection_edge/var/list/connecting_turfs = list()
+/connection_edge/var/direct = 0
 
 /connection_edge/var/coefficient = 0
 
@@ -69,6 +70,7 @@ Class Procs:
 
 /connection_edge/proc/add_connection(connection/c)
 	coefficient++
+	if(c.direct()) direct++
 	//world << "Connection added: [type] Coefficient: [coefficient]"
 
 /connection_edge/proc/remove_connection(connection/c)
@@ -76,6 +78,7 @@ Class Procs:
 	coefficient--
 	if(coefficient <= 0)
 		erase()
+	if(c.direct()) direct--
 
 /connection_edge/proc/contains_zone(zone/Z)
 
@@ -114,7 +117,6 @@ Class Procs:
 
 
 /connection_edge/zone/var/zone/B
-/connection_edge/zone/var/direct = 0
 
 /connection_edge/zone/New(zone/A, zone/B)
 
@@ -128,11 +130,9 @@ Class Procs:
 /connection_edge/zone/add_connection(connection/c)
 	. = ..()
 	connecting_turfs.Add(c.A)
-	if(c.direct()) direct++
 
 /connection_edge/zone/remove_connection(connection/c)
 	connecting_turfs.Remove(c.A)
-	if(c.direct()) direct--
 	. = ..()
 
 /connection_edge/zone/contains_zone(zone/Z)