//Zlevel where overmap objects should be
#define OVERMAP_ZLEVEL 1
//How far from the edge of overmap zlevel could randomly placed objects spawn
#define OVERMAP_EDGE 7

//list used to track which zlevels are being 'moved' by the proc below
var/list/moving_levels = list()
//Proc to 'move' stars in spess
//yes it looks ugly, but it should only fire when state actually change.
//null direction stops movement
proc/toggle_move_stars(zlevel, direction)
	if(!zlevel)
		return

	var/gen_dir = null
	if(direction & (NORTH|SOUTH))
		gen_dir += "ns"
	else if(direction & (EAST|WEST))
		gen_dir += "ew"
	if(!direction)
		gen_dir = null

	if (moving_levels["zlevel"] != gen_dir)
		moving_levels["zlevel"] = gen_dir
		for(var/turf/space/S in world)
			if(S.z == zlevel)
				spawn(0)
					var/turf/T = S
					if(!gen_dir)
						T.icon_state = "[((T.x + T.y) ^ ~(T.x * T.y) + T.z) % 25]"
					else
						T.icon_state = "speedspace_[gen_dir]_[rand(1,15)]"
						for(var/atom/movable/AM in T)
							if (!AM.anchored)
								AM.throw_at(get_step(T,reverse_direction(direction)), 5, 1)