refactor is_blocked_turf

code/__HELPERS/unsorted.dm

@@ -641,23 +641,6 @@ Returns 1 if the chain up to the area contains the given typepath
 
 	return 1
 
-/proc/is_blocked_turf(turf/T, exclude_mobs, list/excluded_objs)
-	if(T.density)
-		return TRUE
-	if(locate(/mob/living/silicon/ai) in T) //Prevents jaunting onto the AI core cheese, AI should always block a turf due to being a dense mob even when unanchored
-		return TRUE
-	if(!exclude_mobs)
-		for(var/mob/living/L in T)
-			if(L.density)
-				return TRUE
-	var/any_excluded_objs = length(excluded_objs)
-	for(var/obj/O in T)
-		if(any_excluded_objs && (O in excluded_objs))
-			continue
-		if(O.density)
-			return TRUE
-	return FALSE
-
 //Returns: all the areas in the world
 /proc/return_areas()
 	var/list/area/areas = list()

code/controllers/subsystem/SSshuttles.dm

@@ -361,7 +361,7 @@ SUBSYSTEM_DEF(shuttle)
 
 	if(!length(supply_shuttle_turfs))
 		for(var/turf/simulated/T in supply.areaInstance)
-			if(is_blocked_turf(T))
+			if(T.is_blocked_turf())
 				continue
 			supply_shuttle_turfs += T
 	if(!length(supply_shuttle_turfs)) // In case some nutjob walled the supply shuttle 10 minutes into the round

code/datums/ai/basic_mobs/basic_ai_behaviors/basic_attacking.dm

@@ -115,7 +115,7 @@
 		var/turf/target_turf = get_step(our_turf, direction)
 		if(isnull(target_turf))
 			continue
-		if(is_blocked_turf(target_turf) || get_dist(target_turf, target) > get_dist(living_pawn, target))
+		if(target_turf.is_blocked_turf() || get_dist(target_turf, target) > get_dist(living_pawn, target))
 			continue
 		possible_turfs += target_turf
 

code/datums/ai/basic_mobs/basic_ai_behaviors/run_away_from_target.dm

@@ -52,7 +52,7 @@
 	var/turf/return_turf
 	for(var/i in 1 to run_distance)
 		var/turf/test_destination = get_ranged_target_turf_direct(source, target, range = i, offset = angle)
-		if(is_blocked_turf(test_destination, excluded_objs = GLOB.airlocks + src))
+		if(test_destination.is_blocked_turf(source_atom = source, ignore_atoms = GLOB.airlocks))
 			break
 		return_turf = test_destination
 	return return_turf

code/datums/components/shelved.dm

@@ -59,9 +59,13 @@
 	for(var/turf/turf_in_view in view(2, get_turf(structure_parent)))
 		if(!isfloorturf(turf_in_view))
 			continue
+		var/blocked_los = FALSE
 		for(var/turf/potential_blockage as anything in get_line(get_turf(structure_parent), turf_in_view))
-			if(!is_blocked_turf(potential_blockage, exclude_mobs = TRUE, excluded_objs = list(parent)))
-				nearby_empty_tiles += turf_in_view
+			if(potential_blockage.is_blocked_turf(exclude_mobs = TRUE, source_atom = parent))
+				blocked_los = TRUE
+				break
+		if(!blocked_los)
+			nearby_empty_tiles += turf_in_view
 
 	var/itemcount = 1
 	for(var/obj/item/I in structure_parent.loc)

code/datums/spells/ethereal_jaunt.dm

@@ -61,7 +61,7 @@
 	sleep(jaunt_in_time)
 	qdel(holder)
 	if(!QDELETED(target))
-		if(is_blocked_turf(mobloc, TRUE))
+		if(mobloc.is_blocked_turf(exclude_mobs = TRUE))
 			for(var/turf/T in orange(7))
 				if(isspaceturf(T))
 					continue

code/game/atoms_movable.dm

@@ -1053,7 +1053,7 @@
 
 	var/has_tried_to_move = FALSE
 
-	if(is_blocked_turf(target_turf, TRUE, excluded_objs = list(src)))
+	if(target_turf.is_blocked_turf(exclude_mobs = TRUE, ignore_atoms = list(src)))
 		has_tried_to_move = TRUE
 		if(!Move(target_turf, crush_dir))
 			// we'll try to move, and if we didn't end up going anywhere, then we do nothing.

code/game/gamemodes/malfunction/Malf_Modules.dm

@@ -710,7 +710,7 @@
 		to_chat(src, "<span class='warning'>You don't have camera vision of this location!</span>")
 		addtimer(CALLBACK(src, PROC_REF(remove_transformer_image), client, I, deploylocation), 3 SECONDS)
 		return FALSE
-	if(is_blocked_turf(deploylocation))
+	if(deploylocation.is_blocked_turf())
 		to_chat(src, "<span class='warning'>That area must be clear of objects!</span>")
 		addtimer(CALLBACK(src, PROC_REF(remove_transformer_image), client, I, deploylocation), 3 SECONDS)
 		return FALSE

code/game/gamemodes/wizard/magic_tarot.dm

@@ -384,7 +384,7 @@
 /datum/tarot/the_emperor/activate(mob/living/target)
 	var/list/L = list()
 	for(var/turf/T in get_area_turfs(/area/station/command/bridge))
-		if(is_blocked_turf(T))
+		if(T.is_blocked_turf())
 			continue
 		L.Add(T)
 
@@ -576,7 +576,7 @@
 /datum/tarot/the_stars/activate(mob/living/target)
 	var/list/L = list()
 	for(var/turf/T in get_area_turfs(/area/station/security/evidence))
-		if(is_blocked_turf(T))
+		if(T.is_blocked_turf())
 			continue
 		L.Add(T)
 
@@ -1007,7 +1007,7 @@
 /datum/tarot/reversed/the_world/activate(mob/living/target)
 	var/list/L = list()
 	for(var/turf/T in get_area_turfs(/area/mine/outpost)) //Lavaland is the abyss, but also too hot to send people too. Mining base should be fair!
-		if(is_blocked_turf(T))
+		if(T.is_blocked_turf())
 			continue
 		L.Add(T)
 

code/game/machinery/deployable.dm

@@ -209,20 +209,20 @@
 	new /obj/structure/barricade/security(get_turf(loc))
 	switch(mode)
 		if(VERTICAL)
-			var/target_turf = get_step(src, NORTH)
-			if(!(is_blocked_turf(target_turf)))
+			var/turf/target_turf = get_step(src, NORTH)
+			if(!(target_turf.is_blocked_turf()))
 				new /obj/structure/barricade/security(target_turf)
 
-			var/target_turf2 = get_step(src, SOUTH)
-			if(!(is_blocked_turf(target_turf2)))
+			var/turf/target_turf2 = get_step(src, SOUTH)
+			if(!(target_turf2.is_blocked_turf()))
 				new /obj/structure/barricade/security(target_turf2)
 		if(HORIZONTAL)
-			var/target_turf = get_step(src, EAST)
-			if(!(is_blocked_turf(target_turf)))
+			var/turf/target_turf = get_step(src, EAST)
+			if(!(target_turf.is_blocked_turf()))
 				new /obj/structure/barricade/security(target_turf)
 
-			var/target_turf2 = get_step(src, WEST)
-			if(!(is_blocked_turf(target_turf2)))
+			var/turf/target_turf2 = get_step(src, WEST)
+			if(!(target_turf2.is_blocked_turf()))
 				new /obj/structure/barricade/security(target_turf2)
 	qdel(src)
 
@@ -367,12 +367,12 @@
 
 	var/dir_left = turn(direction, -90)
 	var/dir_right = turn(direction, 90)
-	var/target_turf = get_step(src, dir_left)
-	if(!is_blocked_turf(target_turf))
+	var/turf/target_turf = get_step(src, dir_left)
+	if(!target_turf.is_blocked_turf())
 		connected_shields += new barricade_type(target_turf, src, FALSE, direction, dir_left)
 
-	var/target_turf2 = get_step(src, dir_right)
-	if(!is_blocked_turf(target_turf2))
+	var/turf/target_turf2 = get_step(src, dir_right)
+	if(!target_turf2.is_blocked_turf())
 		connected_shields += new barricade_type(target_turf2, src, FALSE, direction, dir_right)
 
 

code/game/objects/effects/spawners/random/random_spawner.dm

@@ -180,7 +180,7 @@
 
 /obj/effect/spawner/random/proc/has_unblocked_line(destination)
 	for(var/turf/potential_blockage as anything in get_line(get_turf(src), destination))
-		if(!is_blocked_turf(potential_blockage, exclude_mobs = TRUE))
+		if(!potential_blockage.is_blocked_turf(exclude_mobs = TRUE))
 			continue
 		return FALSE
 	return TRUE

code/game/objects/items/weapons/caution.dm

@@ -82,7 +82,7 @@
 		return
 	var/turf/T = get_turf(target)
 
-	if(is_blocked_turf(T, TRUE)) //can't put mines on a tile that has dense stuff
+	if(T.is_blocked_turf(exclude_mobs = TRUE)) //can't put mines on a tile that has dense stuff
 		to_chat(user, "<span class='notice'>The space is occupied! You cannot place a mine there!</span>")
 		return
 	if(!use(1)) //Can't place a landmine if you don't have a landmine

code/game/objects/items/weapons/holosign_projector.dm

@@ -28,7 +28,7 @@
 			to_chat(user, "<span class='notice'>You use [src] to deactivate [H].</span>")
 			qdel(H)
 		else
-			if(!is_blocked_turf(T, TRUE)) //can't put holograms on a tile that has dense stuff
+			if(!T.is_blocked_turf(exclude_mobs = TRUE)) //can't put holograms on a tile that has dense stuff
 				if(holocreator_busy)
 					to_chat(user, "<span class='notice'>[src] is busy creating a hologram.</span>")
 					return
@@ -42,7 +42,7 @@
 						holocreator_busy = FALSE
 						if(length(signs) >= max_signs)
 							return
-						if(is_blocked_turf(T, TRUE)) //don't try to sneak dense stuff on our tile during the wait.
+						if(T.is_blocked_turf(exclude_mobs = TRUE)) //don't try to sneak dense stuff on our tile during the wait.
 							return
 					H = new holosign_type(get_turf(target), src)
 					to_chat(user, "<span class='notice'>You create [H] with [src].</span>")

code/game/objects/items/weapons/melee/melee_misc.dm

@@ -512,7 +512,7 @@
 			return
 		var/list/turfs = list()
 		for(var/turf/T in orange(1, get_turf(target)))
-			if(is_blocked_turf(T, TRUE))
+			if(T.is_blocked_turf(exclude_mobs = TRUE))
 				continue
 			turfs += T
 

code/game/objects/items/weapons/scrolls.dm

@@ -50,7 +50,7 @@
 	var/list/L = list()
 
 	for(var/turf/T in get_area_turfs(thearea.type))
-		if(is_blocked_turf(T))
+		if(T.is_blocked_turf())
 			continue
 		L.Add(T)
 

code/game/turfs/turf.dm

@@ -875,3 +875,45 @@
 /// encounter lava
 /turf/proc/can_cross_safely(atom/movable/crossing)
 	return TRUE
+
+/**
+ * Check whether we are blocked by something dense in our contents with respect to a specific atom.
+ *
+ * Arguments:
+ * * exclude_mobs - If TRUE, ignores dense mobs on the turf.
+ * * source_atom - If this is not null, will check whether any contents on the
+ *   turf can block this atom specifically. Also ignores itself on the turf.
+ * * ignore_atoms - Check will ignore any atoms in this list. Useful to prevent
+ *   an atom from blocking itself on the turf.
+ * * type_list - are we checking for types of atoms to ignore and not physical atoms
+ */
+/turf/proc/is_blocked_turf(exclude_mobs = FALSE, source_atom = null, list/ignore_atoms, type_list = FALSE)
+	if(density)
+		return TRUE
+
+	for(var/atom/movable/movable_content as anything in contents)
+		// If a source_atom is specified, that's what we're checking
+		// blockage with respect to, so we ignore it
+		if(movable_content == source_atom)
+			continue
+
+		// Prevents jaunting onto the AI core cheese, AI should always block a
+		// turf due to being a dense mob even when unanchored
+		if(is_ai(movable_content))
+			return TRUE
+
+		// don't consider ignored atoms or their types
+		if(length(ignore_atoms))
+			if(!type_list && (movable_content in ignore_atoms))
+				continue
+			else if(type_list && is_type_in_list(movable_content, ignore_atoms))
+				continue
+
+		// If the thing is dense AND we're including mobs or the thing isn't a
+		// mob AND if there's a source atom and it cannot pass through the thing
+		// on the turf, we consider the turf blocked.
+		if(movable_content.density && (!exclude_mobs || !ismob(movable_content)))
+			if(source_atom && movable_content.CanPass(source_atom, get_dir(src, source_atom)))
+				continue
+			return TRUE
+	return FALSE

code/modules/antagonists/traitor/contractor/datums/syndicate_contract.dm

@@ -534,7 +534,7 @@
 /datum/syndicate_contract/proc/handle_target_return(mob/living/M)
 	var/list/turf/possible_turfs = list()
 	for(var/turf/T in contract.extraction_zone.contents)
-		if(!isspaceturf(T) && !is_blocked_turf(T))
+		if(!isspaceturf(T) && !T.is_blocked_turf())
 			possible_turfs += T
 
 	var/turf/destination = length(possible_turfs) ? pick(possible_turfs) : pick(GLOB.latejoin)

code/modules/events/anomaly_event.dm

@@ -25,7 +25,7 @@
 		var/list/candidate_turfs = get_area_turfs(impact_area)
 		while(length(candidate_turfs))
 			var/turf/candidate = pick_n_take(candidate_turfs)
-			if(!is_blocked_turf(candidate,TRUE))
+			if(!candidate.is_blocked_turf(exclude_mobs = TRUE))
 				target_turf = candidate
 				break
 		if(target_turf)

code/modules/events/infestation.dm

@@ -37,7 +37,7 @@
 			if(!destination)
 				continue
 			for(var/turf/simulated/floor/F in destination.contents)
-				if(!is_blocked_turf(F))
+				if(!F.is_blocked_turf())
 					turfs += F
 			if(length(turfs))
 				spawn_area_type = area_type

code/modules/events/tear.dm

@@ -23,7 +23,7 @@
 	var/list/area_turfs = get_area_turfs(impact_area)
 	while(length(area_turfs))
 		var/turf/T = pick_n_take(area_turfs)
-		if(is_blocked_turf(T))
+		if(T.is_blocked_turf())
 			continue
 
 		// Give ghosts some time to jump there before it begins.

code/modules/hallucinations/effects/major.dm

@@ -95,7 +95,7 @@
 
 	var/list/locs = list()
 	for(var/turf/T in oview(world.view, target))
-		if(!is_blocked_turf(T))
+		if(!T.is_blocked_turf())
 			locs += T
 	if(!length(locs))
 		qdel(src)
@@ -124,7 +124,7 @@
 	// Find a spot for the scientist to spawn
 	var/list/locs = list()
 	for(var/turf/T in orange(1, target))
-		if(!is_blocked_turf(T))
+		if(!T.is_blocked_turf())
 			locs += T
 	locs -= get_turf(agent)
 	if(!length(locs))
@@ -278,7 +278,7 @@
 
 	var/list/locs = list()
 	for(var/turf/T in oview(world.view / 2, target))
-		if(!is_blocked_turf(T))
+		if(!T.is_blocked_turf())
 			locs += T
 	if(!length(locs))
 		qdel(src)
@@ -357,7 +357,7 @@
 	var/list/locs = list()
 	for(var/turf/T in oview(world.view / 2, target))
 		var/light_amount = T.get_lumcount()
-		if(!is_blocked_turf(T) && light_amount <= 0.5)
+		if(!T.is_blocked_turf() && light_amount <= 0.5)
 			locs += T
 	if(!length(locs))
 		return INITIALIZE_HINT_QDEL

code/modules/hallucinations/effects/moderate.dm

@@ -81,7 +81,7 @@
 
 	var/list/locs = list()
 	for(var/turf/T in oview(world.view, target))
-		if(!is_blocked_turf(T))
+		if(!T.is_blocked_turf())
 			locs += T
 	if(!length(locs))
 		qdel(src)
@@ -195,7 +195,7 @@
 	// Let's check if we can spawn somewhere first
 	var/list/locs = list()
 	for(var/turf/T in oview(world.view, target))
-		if(isfloorturf(T) && !is_blocked_turf(T))
+		if(isfloorturf(T) && !T.is_blocked_turf())
 			locs += T
 	if(!length(locs))
 		qdel(src)
@@ -257,7 +257,8 @@
 
 	var/list/vents = list()
 	for(var/obj/machinery/atmospherics/unary/vent_pump/vent in oview(world.view, target))
-		if(!is_blocked_turf(vent) && !vent.welded)
+		var/turf/vent_turf = get_turf(vent)
+		if(!vent_turf.is_blocked_turf() && !vent.welded)
 			vents += vent
 	if(!length(vents))
 		qdel(src)
@@ -320,7 +321,7 @@
 
 	var/list/locs = list()
 	for(var/turf/T in oview(world.view, target))
-		if(isfloorturf(T) && !is_blocked_turf(T))
+		if(isfloorturf(T) && !T.is_blocked_turf())
 			locs += T
 	if(!length(locs))
 		qdel(src)
@@ -512,7 +513,7 @@
 
 	var/list/locs = list()
 	for(var/turf/T in oview(world.view / 2, target))
-		if(!is_blocked_turf(T))
+		if(!T.is_blocked_turf())
 			locs += T
 	if(!length(locs))
 		return INITIALIZE_HINT_QDEL

code/modules/mining/lavaland/loot/colossus_loot.dm

@@ -117,7 +117,7 @@
 					var/turf/T = Stuff
 					if((isspaceturf(T) || isfloorturf(T)) && NewTerrainFloors)
 						var/turf/simulated/O = T.ChangeTurf(NewTerrainFloors, keep_icon = FALSE)
-						if(prob(florachance) && length(NewFlora) && !is_blocked_turf(O))
+						if(prob(florachance) && length(NewFlora) && !O.is_blocked_turf())
 							var/atom/Picked = pick(NewFlora)
 							new Picked(O)
 						continue