Automatic conversion via Regex

code/game/objects/effects/effect_system/effects_other.dm

@@ -38,7 +38,7 @@
 		if(number < 3)
 			var/obj/effect/particle_effect/steam/I = PoolOrNew(/obj/effect/particle_effect/steam, oldposition)
 			number++
-			I.dir = holder.dir
+			I.setDir(holder.dir)
 			oldposition = get_turf(holder)
 			spawn(10)
 				qdel(I)
@@ -68,7 +68,7 @@
 		if(T != oldposition)
 			if(!has_gravity(T))
 				var/obj/effect/particle_effect/ion_trails/I = PoolOrNew(effect_type, oldposition)
-				I.dir = holder.dir
+				I.setDir(holder.dir)
 				flick("ion_fade", I)
 				I.icon_state = ""
 				spawn(20)

code/game/objects/effects/effect_system/effects_smoke.dm

@@ -79,7 +79,7 @@
 			smoke_mob(L)
 		var/obj/effect/particle_effect/smoke/S = new type(T)
 		reagents.copy_to(S, reagents.total_volume)
-		S.dir = pick(cardinal)
+		S.setDir(pick(cardinal))
 		S.amount = amount-1
 		S.color = color
 		S.lifetime = lifetime