Ensures update_pipe_vision is called only when you switch pipenets. Fixes lag caused by ventcrawlers (#19620)

* Ensures update_pipe_vision is called only when you switch pipenets

* Comments baby

code/modules/atmospherics/machinery/atmospherics.dm

@@ -157,6 +157,13 @@ Pipelines + Other Objects -> Pipe network
 /obj/machinery/atmospherics/proc/returnPipenet()
 	return
 
+/**
+ * Whether or not this atmos machine has multiple pipenets attached to it
+ * Used to determine if a ventcrawler should update their vision or not
+ */
+/obj/machinery/atmospherics/proc/is_pipenet_split()
+	return FALSE
+
 /obj/machinery/atmospherics/proc/returnPipenetAir()
 	return
 
@@ -317,7 +324,7 @@ Pipelines + Other Objects -> Pipe network
 			user.forceMove(target_move.loc) //handles entering and so on
 			user.visible_message("You hear something squeezing through the ducts.", "You climb out of the ventilation system.")
 		else if(target_move.can_crawl_through())
-			if(returnPipenet(target_move) != target_move.returnPipenet())
+			if(is_pipenet_split()) // Going away from a split means we want to update the view of the pipenet
 				user.update_pipe_vision(target_move)
 			user.forceMove(target_move)
 			if(world.time - user.last_played_vent > VENT_SOUND_DELAY)

code/modules/atmospherics/machinery/components/binary_devices/binary_atmos_base.dm

@@ -128,6 +128,9 @@
 	else if(A == node2)
 		return parent2
 
+/obj/machinery/atmospherics/binary/is_pipenet_split()
+	return TRUE
+
 /obj/machinery/atmospherics/binary/replacePipenet(datum/pipeline/Old, datum/pipeline/New)
 	if(Old == parent1)
 		parent1 = New

code/modules/atmospherics/machinery/components/trinary_devices/trinary_base.dm

@@ -181,6 +181,9 @@
 	else if(A == node3)
 		return parent3
 
+/obj/machinery/atmospherics/trinary/is_pipenet_split()
+	return FALSE
+
 /obj/machinery/atmospherics/trinary/replacePipenet(datum/pipeline/Old, datum/pipeline/New)
 	if(Old == parent1)
 		parent1 = New

code/modules/atmospherics/machinery/pipes/pipe.dm

@@ -39,8 +39,6 @@
 	parent = null
 
 /obj/machinery/atmospherics/pipe/returnPipenet(obj/machinery/atmospherics/A)
-	if(A)
-		return // It's called by a moving mob that's already in the pipenet
 	return parent
 
 /obj/machinery/atmospherics/pipe/detailed_examine()

code/modules/mob/living/login.dm

@@ -19,6 +19,6 @@
 		ranged_ability.add_ranged_ability(src, "<span class='notice'>You currently have <b>[ranged_ability]</b> active!</span>")
 
 	//Should update regardless of if we can ventcrawl, since we can end up in pipes in other ways.
-	update_pipe_vision()
+	update_pipe_vision(loc)
 
 	return .