Merge pull request #3771 from Mloc/newzasfix

Small work on making zones wake up on geometry changes.

code/ZAS/FEA_gas_mixture.dm

@@ -1007,6 +1007,18 @@ What are the archived variables for?
 					return 0
 	return 1
 
+/datum/gas_mixture/proc/compare_unsim(turf/list/samples)
+	//Purpose: Compares a list of unsimulated tiles to self to see if within acceptable ranges that group processing may be enabled
+	//Called by: ZAS sleeping detection.
+	//Inputs: List of unsimulated turfs to compare to
+	//Outputs: 1 if within an acceptable range to sleep, 0 otherwise.
+	var/datum/gas_mixture/after_share = new
+	after_share.copy_from(src)
+
+	ShareSpace(after_share, samples)
+
+	return src.compare(after_share)
+
 /datum/gas_mixture/proc/subtract(datum/gas_mixture/right_side)
 	//Purpose: Subtracts right_side from air_mixture. Used to help turfs mingle
 	//Called by: Pipelines ending in a break (or something)

code/ZAS/ZAS_Turfs.dm

@@ -179,6 +179,8 @@
 			if((air_check_directions & direction && !(air_directions_archived & direction)) || \
 				(unsim_check_directions & direction && !(unsim_directions_archived & direction)))
 				ZConnect(src,T)
+				zone.ActivateIfNeeded()
+				if(T.zone) T.zone.ActivateIfNeeded()
 
 			//Something like a wall was built, changing the geometry.
 			else if((!(air_check_directions & direction) && air_directions_archived & direction) || \

code/ZAS/ZAS_Zones.dm

@@ -21,6 +21,7 @@ var/list/CounterDoorDirections = list(SOUTH,EAST) //Which directions doors turfs
 	var/last_rebuilt = 0
 	var/status = ZONE_ACTIVE
 	var/interactions_with_neighbors = 0
+	var/interactions_with_unsim = 0
 	var/progress = "nothing"
 
 
@@ -185,10 +186,14 @@ var/list/CounterDoorDirections = list(SOUTH,EAST) //Which directions doors turfs
 				unsimulated_tiles -= T
 
 		if(unsimulated_tiles.len)
+			var/old_pressure = air.return_pressure()
 			var/moved_air = ShareSpace(air,unsimulated_tiles)
 
 			if(moved_air > vsc.airflow_lightest_pressure)
 				AirflowSpace(src)
+
+			if(old_pressure && (moved_air / old_pressure) > MINIMUM_AIR_RATIO_TO_SUSPEND) //Check if we've moved enough air to be considered awake.
+				interactions_with_unsim++
 		else
 			unsimulated_tiles = null
 
@@ -305,10 +310,11 @@ var/list/CounterDoorDirections = list(SOUTH,EAST) //Which directions doors turfs
 					Z.interactions_with_neighbors++
 					interactions_with_neighbors++
 
-		if(!interactions_with_neighbors && !unsimulated_tiles)
+		if(!interactions_with_neighbors && !interactions_with_unsim)
 			SetStatus(ZONE_SLEEPING)
 
 		interactions_with_neighbors = 0
+		interactions_with_unsim = 0
 
 	progress = "all components completed successfully, the problem is not here"
 
@@ -329,6 +335,28 @@ var/list/CounterDoorDirections = list(SOUTH,EAST) //Which directions doors turfs
 /zone/proc/CheckStatus()
 	return status
 
+
+/zone/proc/ActivateIfNeeded()
+	if(status == ZONE_ACTIVE) return
+
+	var/difference = 0
+
+	if(unsimulated_tiles && unsimulated_tiles.len)
+		if(air.compare_unsim(unsimulated_tiles))
+			difference = 1
+
+	if(!difference)
+		for(var/zone/Z in connected_zones) //Check adjacent zones for air difference.
+			if(air.compare(Z.air))
+				difference = 1
+				break
+
+	if(difference) //We have a difference, activate the zone.
+		SetStatus(ZONE_ACTIVE)
+
+	return
+
+
 /zone/proc/assume_air(var/datum/gas_mixture/giver)
 	if(status == ZONE_ACTIVE)
 		return air.merge(giver)