extends Particles2D

var owner
var owner_ptr

func _ready(): set_fixed_process(true)

const FADE_OUT_TIME = 1.4

var fade_timer = 0.0

var timer = 0.0
var duration = 0.0


func _fixed_process(delta):

	if(duration > 0.0): timer += delta

	if(owner_ptr.get_ref() == null or (duration > 0.0 and timer >= duration)):

		set_emitting(false)

		if(fade_timer >= FADE_OUT_TIME):
			set_opacity(0)
			queue_free()

		else:
			fade_timer += delta
			set_opacity(1 - fade_timer / FADE_OUT_TIME)

	elif(owner_ptr.get_ref() != null):
		set_global_pos(owner.get_global_pos())


func follow(drone_body):

	owner = drone_body
	owner_ptr = weakref(owner)