[MIRROR] fixes an issue with disposal junctions ending with weird directions & RPD icons (#8176)

Co-authored-by: Kashargul <144968721+Kashargul@users.noreply.github.com>
Co-authored-by: CHOMPStation2 <chompsation2@gmail.com>

code/ATMOSPHERICS/atmospherics.dm

@@ -16,7 +16,7 @@ Pipelines + Other Objects -> Pipe network
 	power_channel = ENVIRON
 	var/nodealert = 0
 	var/power_rating //the maximum amount of power the machine can use to do work, affects how powerful the machine is, in Watts
-	
+
 	unacidable = TRUE
 	layer = ATMOS_LAYER
 	plane = PLATING_PLANE
@@ -171,6 +171,9 @@ Pipelines + Other Objects -> Pipe network
 	if(construction_type)
 		var/obj/item/pipe/I = new construction_type(loc, null, null, src)
 		I.setPipingLayer(piping_layer)
+		if(istype(I, /obj/item/pipe/trinary/flippable))
+			var/obj/item/pipe/trinary/flippable/flip = I
+			flip.icon_state = "[flip.icon_state][flip.mirrored ? "m" : ""]"
 		transfer_fingerprints_to(I)
 	qdel(src)
 

code/modules/recycling/disposal-construction.dm

@@ -25,15 +25,15 @@
 	// Disposals handle "bent"/"corner" strangely, handle this specially.
 	if(ptype == DISPOSAL_PIPE_STRAIGHT && (dir in cornerdirs))
 		ptype = DISPOSAL_PIPE_CORNER
-		switch(dir)
+	switch(dir)
-			if(NORTHWEST)
+		if(NORTHWEST)
-				dir = WEST
+			dir = WEST
-			if(NORTHEAST)
+		if(NORTHEAST)
-				dir = NORTH
+			dir = NORTH
-			if(SOUTHWEST)
+		if(SOUTHWEST)
-				dir = SOUTH
+			dir = SOUTH
-			if(SOUTHEAST)
+		if(SOUTHEAST)
-				dir = EAST
+			dir = EAST
 
 	switch(ptype)
 		if(DISPOSAL_PIPE_BIN, DISPOSAL_PIPE_OUTLET, DISPOSAL_PIPE_CHUTE)