Camera3D shake code

extends Camera2D

var time = 0
var period = 0.3
var magnitude = 0.2

func _ready():
	set_process(true)

# Shake with decreasing intensity while there's time remaining.
func _process(delta):
	pass

func shake(duration, frequency, amplitude):
	var campos = get_camera_screen_center()
	while time < period:
		time += get_process_delta_time()
		time = min (time, period)

		#shake
		var offset = Vector2()
		offset.x = rand_range(-magnitude, magnitude)
		offset.y = rand_range(-period, magnitude)

		var newcampos = campos
		newcampos += offset
		set_camera_screen_center(newcampos)

		yield(get_tree(), "idle_frame")
		pass
	set_camera_screen_center(campos)
	pass