player.gd

extends Area2D

signal hit

@export var speed = 400 # How fast the player will move (pixels/sec).
var screen_size # Size of the game window.

# Called when the node enters the scene tree for the first time.
func _ready():
  screen_size = get_viewport_rect().size
  hide()


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta):
  var velocity = Vector2.ZERO # The player's movement vector.
  if Input.is_action_pressed("move_right"):
    velocity.x += 1
  if Input.is_action_pressed("move_left"):
    velocity.x -= 1
  if Input.is_action_pressed("move_down"):
    velocity.y += 1
  if Input.is_action_pressed("move_up"):
    velocity.y -= 1

  if velocity.length() > 0:
    velocity = velocity.normalized() * speed
    $AnimatedSprite2D.play()
  else:
    $AnimatedSprite2D.stop()

  position += velocity * delta
  position = position.clamp(Vector2.ZERO, screen_size)

  if velocity.x != 0:
    $AnimatedSprite2D.animation = "walk"
    $AnimatedSprite2D.flip_v = false
    # See the note below about boolean assignment.
    $AnimatedSprite2D.flip_h = velocity.x < 0
  elif velocity.y != 0:
    $AnimatedSprite2D.animation = "up"
    $AnimatedSprite2D.flip_v = velocity.y > 0

func start(pos):
  position = pos
  show()
  $CollisionShape2D.disabled = false

func _on_body_entered(body):
  hide() # Player disappears after being hit.
  hit.emit()
  # Must be deferred as we can't change physics properties on a physics callback.
  $CollisionShape2D.set_deferred("disabled", true)