extends NinePatchRect

var max_displacement : float = 50
var speed : float = 10
var move_dir : Vector2
var start_position : Vector2


func _ready() -> void:
	start_position = position
	move_dir = Vector2.UP.rotated(randf() * 2 * PI)

func _process(delta: float) -> void:
	var offset = (position - start_position).length() / max_displacement
	var turn = randf_range(-PI / 6.0, PI / 6.0) * offset 
	var a_dir = move_dir.rotated(turn)
	var b_dir = move_dir.rotated(-turn)
	var ap = position + speed * delta * a_dir
	var bp = position + speed * delta * b_dir
	var mpsq = max_displacement * max_displacement
	if ap.distance_squared_to(start_position) < mpsq:
		position = ap
		move_dir = a_dir
	else:
		position = bp
		move_dir = b_dir