Makes a PhysicsBody2D fall through a platform

dropdown.gd

extends Area2D

const DOULBE_TAP_MAX_TIME = 0.25
const MAX_NAV_DISABLE = 0.4

var double_tap_timer = 0

signal nav_enable

func _ready():
	set_physics_process(true)

func _physics_process(delta):
	if get_overlapping_bodies().size() == 0:
		emit_signal("nav_enable")

	var double_tap_down = false
	if double_tap_timer > 0:
		double_tap_timer -= delta
		if Input.is_action_just_pressed("ui_down"):
			double_tap_down = true
		if double_tap_timer < 0:
			double_tap_timer = 0
	else:
		if Input.is_action_just_pressed("ui_down"):
			double_tap_timer = DOULBE_TAP_MAX_TIME

	if double_tap_down:
		for body in get_overlapping_bodies():
			disable_until_separated(body)

func disable_until_separated(collider):
	get_parent().add_collision_exception_with(collider)
	yield(self, "nav_enable")
	get_parent().remove_collision_exception_with(collider)