refactor 'dir = ' into 'set_dir()'

This should have little/no gameplay effect right now, just paving the
 way for directional lights.
Replaced handle_rotation() on buckly things with this.

Signed-off-by: Mloc-Argent <colmohici@gmail.com>

code/modules/power/singularity/emitter.dm

@@ -33,7 +33,7 @@
 	if (src.anchored || usr:stat)
 		usr << "It is fastened to the floor!"
 		return 0
-	src.dir = turn(src.dir, 90)
+	src.set_dir(turn(src.dir, 90))
 	return 1
 
 /obj/machinery/power/emitter/initialize()
@@ -137,7 +137,7 @@
 			var/datum/effect/effect/system/spark_spread/s = new /datum/effect/effect/system/spark_spread
 			s.set_up(5, 1, src)
 			s.start()
-		A.dir = src.dir
+		A.set_dir(src.dir)
 		switch(dir)
 			if(NORTH)
 				A.yo = 20

code/modules/power/singularity/field_generator.dm

@@ -299,7 +299,7 @@ field_generator power level display
 			fields += CF
 			G.fields += CF
 			CF.loc = T
-			CF.dir = field_dir
+			CF.set_dir(field_dir)
 	var/listcheck = 0
 	for(var/obj/machinery/field_generator/FG in connected_gens)
 		if (isnull(FG))

code/modules/power/singularity/particle_accelerator/particle.dm

@@ -29,7 +29,7 @@
 
 /obj/effect/accelerated_particle/New(loc, dir = 2)
 	src.loc = loc
-	src.dir = dir
+	src.set_dir(dir)
 	if(movement_range > 20)
 		movement_range = 20
 	spawn(0)

code/modules/power/singularity/particle_accelerator/particle_accelerator.dm

@@ -91,7 +91,7 @@ So, hopefully this is helpful if any more icons are to be added/changed/wonderin
 	if (src.anchored || usr:stat)
 		usr << "It is fastened to the floor!"
 		return 0
-	src.dir = turn(src.dir, 270)
+	src.set_dir(turn(src.dir, 270))
 	return 1
 
 /obj/structure/particle_accelerator/verb/rotateccw()
@@ -102,7 +102,7 @@ So, hopefully this is helpful if any more icons are to be added/changed/wonderin
 	if (src.anchored || usr:stat)
 		usr << "It is fastened to the floor!"
 		return 0
-	src.dir = turn(src.dir, 90)
+	src.set_dir(turn(src.dir, 90))
 	return 1
 
 /obj/structure/particle_accelerator/examine(mob/user)
@@ -282,7 +282,7 @@ So, hopefully this is helpful if any more icons are to be added/changed/wonderin
 	if (src.anchored || usr:stat)
 		usr << "It is fastened to the floor!"
 		return 0
-	src.dir = turn(src.dir, 270)
+	src.set_dir(turn(src.dir, 270))
 	return 1
 
 /obj/machinery/particle_accelerator/verb/rotateccw()
@@ -293,7 +293,7 @@ So, hopefully this is helpful if any more icons are to be added/changed/wonderin
 	if (src.anchored || usr:stat)
 		usr << "It is fastened to the floor!"
 		return 0
-	src.dir = turn(src.dir, 90)
+	src.set_dir(turn(src.dir, 90))
 	return 1
 
 /obj/machinery/particle_accelerator/update_icon()

code/modules/power/singularity/particle_accelerator/particle_control.dm

@@ -157,7 +157,7 @@
 
 /obj/machinery/particle_accelerator/control_box/proc/part_scan()
 	for(var/obj/structure/particle_accelerator/fuel_chamber/F in orange(1,src))
-		src.dir = F.dir
+		src.set_dir(F.dir)
 	connected_parts = list()
 	var/tally = 0
 	var/ldir = turn(dir,-90)

code/modules/power/singularity/particle_accelerator/particle_emitter.dm

@@ -44,6 +44,6 @@
 			if(2)
 				A = new/obj/effect/accelerated_particle/strong(T, dir)
 		if(A)
-			A.dir = src.dir
+			A.set_dir(src.dir)
 			return 1
 	return 0