Godot Version
4.1
Question
im getting an error on a piece of code
the piece of code navigation_area_2d.target_position = movement_targets.at_home_targets[0].position gets an error saying “Invalid get index ‘0’ (on base: ‘Array[Node2D]’).”
here are the relating scripts incase you need it to fix it
the script that the piece of code is in
extends Area2D
class_name Ghost
enum GhostState {
SCATTER,
CHASE,
RUN_AWAY,
EATEN
}
signal direction_change(current_direction: String)
var current_scatter_index = 0
var direction = null
var current_state: GhostState
var is_blinking = false
@export var speed = 65
@export var movement_targets: Resource
@export var tile_map: MazeTileMap
@export var image: CompressedTexture2D
@export var chasing_target: Node2D
@export var points_manager: PointsManager
@onready var update_chasing_target_position_timer = $updateChasingTargetPositionTimer
@onready var body_sprite = $theghost as BodySprite
@onready var eyes_sprite = $ghosteyes as EyesSprite
@onready var navigation_area_2d = $NavigationAgent2D
@onready var scatter_timer = $scatterTimer
@onready var run_away_timer = $runAwayTimer
@onready var points_label = $pointsLabel
func _ready():
navigation_area_2d.path_desired_distance = 4.0
navigation_area_2d.target_desired_distance = 4.0
navigation_area_2d.target_reached.connect(on_position_reached)
call_deferred("setup")
func _process(delta):
if !run_away_timer.is_stopped() && run_away_timer.time_left < run_away_timer.wait_time / 4 && !is_blinking:
start_blinking()
move_ghost(navigation_area_2d.get_next_path_position(), delta)
func move_ghost(next_position: Vector2, delta: float):
var current_ghost_position = global_position
var new_velocity = (next_position - current_ghost_position).normalized() * speed * delta
caculate_direction(new_velocity)
position += new_velocity
func caculate_direction(new_velocity: Vector2):
var current_direction
if new_velocity.x > 1:
current_direction = "right"
elif new_velocity.x < -1:
current_direction = "left"
elif new_velocity.y > 1:
current_direction = "up"
elif new_velocity.y < -1:
current_direction = "down"
if current_direction != direction:
direction = current_direction
direction_change.emit(direction)
func setup():
print(tile_map.get_navigation_map(0))
navigation_area_2d.set_navigation_map(tile_map.get_navigation_map(0))
NavigationServer2D.agent_set_map(navigation_area_2d.get_rid(), tile_map.get_navigation_map(0))
scatter()
func scatter():
scatter_timer.start()
current_state = GhostState.SCATTER
navigation_area_2d.target_position = movement_targets.scatter_targets[current_scatter_index].position
func on_position_reached():
if current_state == GhostState.SCATTER:
scatter_position_reached()
speed = 65
elif current_state == GhostState.CHASE:
chase_position_reached()
elif current_state == GhostState.RUN_AWAY:
run_away_from_pacman()
func chase_position_reached():
print("kill pacman")
func scatter_position_reached():
if current_scatter_index < 3:
current_scatter_index += 1
else:
current_scatter_index = 0
navigation_area_2d.target_position = movement_targets.scatter_targets[current_scatter_index].position
func _on_scatter_timer_timeout():
starting_chasing_pacman()
func starting_chasing_pacman():
if chasing_target == null:
print("no chasing target, chasing wont work obviously lol")
current_state = GhostState.CHASE
update_chasing_target_position_timer.start()
navigation_area_2d.target_position = chasing_target.position
func _on_update_chasing_target_position_timer_timeout():
navigation_area_2d.target_position = chasing_target.position
func run_away_from_pacman():
if run_away_timer.is_stopped():
body_sprite.run_away()
eyes_sprite.hide_eyes()
run_away_timer.start()
speed = 60
current_state = GhostState.RUN_AWAY
# stop timers
update_chasing_target_position_timer.stop()
scatter_timer.stop()
var empty_cell_position = tile_map.get_random_empty_cell_position()
navigation_area_2d.target_position = empty_cell_position
func start_blinking():
body_sprite.start_blinking()
func _on_run_away_timer_timeout():
is_blinking = false
eyes_sprite.show_eyes()
body_sprite.move()
starting_chasing_pacman()
speed = 75
func get_eaten():
body_sprite.hide()
eyes_sprite.show_eyes()
points_label.show()
await points_manager.pause_ghost()
points_label.hide()
run_away_timer.stop()
current_state = GhostState.EATEN
navigation_area_2d.target_position = movement_targets.at_home_targets[0].position
speed = 100
func _on_body_entered(body):
var player = body as Player
if current_state == GhostState.RUN_AWAY:
get_eaten()
elif current_state == GhostState.CHASE || current_state == GhostState.SCATTER:
set_collision_mask_value(1, false)
update_chasing_target_position_timer.stop()
await points_manager.pause_ghost()
player.die()
body_sprite.hide()
eyes_sprite.hide_eyes()
scatter_timer.wait_time = 20
scatter()
the script where the code is built from:
extends Resource
@export var scatter_targets: Array[Node2D]
@export var at_home_targets: Array[Node2D]
thank you
