Three Hearts

Part of the Projects section of Coddy's Godot journey. Lesson 30 of 33.

Touching the guard should cost a heart. The three hearts in the top bar are Heart1, Heart2 and Heart3, children of $HUD/Hearts. The guard is an Area2D, so its body_entered fires when it touches the hero:

func _on_enemy_body_entered(body):
	health -= 1
	$HUD/Hearts.get_child(health).visible = false

get_child(i) gives a node's child by its place, counting from 0. After the first hit health is 2, and get_child(2) is Heart3. The hearts disappear from the right.

body_entered fires once per touch. A hero who stays in the guard's path loses a heart each time it comes back.

Challenge

Medium

In main.gd:

Add var health = 3 and connect $Enemy.body_entered.
On each touch, lower health by one, then hide $HUD/Hearts.get_child(health).

Try it yourself

extends Node2D

var has_key = false

func _ready():
	$Key.body_entered.connect(_on_key_body_entered)
	$DoorZone.body_entered.connect(_on_door_zone_body_entered)

func _on_key_body_entered(body):
	has_key = true
	$Key.queue_free()
	$HUD/KeyIcon.visible = true

func _on_door_zone_body_entered(body):
	if has_key:
		$Door.queue_free()
		$DoorZone.queue_free()