Needing help with this

[Mark_Caliwa_Velasco]

Godot Version

4.7.2

Question

Was following a tutorial about state machines by chris tutorials and fond a comment that provided a solution for the problem with switching states when going downhill, I applied it and it got me an error:

@export var raycast_2d: RayCast2D


func state_process(_delta):
	if raycast_2d.get_collider()==null:
		playback.travel(jump())
		next_state = charairstate

[tibaverus]

Since it’s an @export variable, you need to go to the inspector in Godot and actually select your RayCast2D node, otherwise it’s going to be null.

[Mark_Caliwa_Velasco]

got it but it still wont work

[gertkeno]

Maybe you want to use "jump" or your variable jump_animation instead of calling the function jump()

[Mark_Caliwa_Velasco]

got it, but got this error

[gertkeno]

You haven’t shown us any code using current_state, chances are you need to fill in another @export variable through the editor.

---

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[Mark_Caliwa_Velasco]

extends State



class_name groundstate

@export var jump_velocity : float = -150.0
@export var charairstate : State
@export var jump_animation : String = "jump"

@export var raycast_2d: RayCast2D


func state_process(_delta):
	if raycast_2d.get_collider()==null:
		playback.travel(jump_animation)
		next_state = charairstate
		
#this is how you write when programming a state
func state_input(event : InputEvent):
	if(event.is_action_pressed("ui_accept")):
		jump()
		
func jump():
	character.velocity.y = jump_velocity
	next_state = charairstate
	playback.travel("jump")

extends Node


# Called when the node enters the scene tree for the first time.
class_name charstatemachine



@export var current_state : State
@export var character : CharacterBody2D
@export var animation_tree : AnimationTree

var states : Array[State]


func _ready():
	for child in get_children():
		if(child is State):
			states.append(child)
			
			#get states that are need to function
			
			child.character = character
			child.playback = animation_tree["parameters/playback"]
			
		else:
			push_warning("Child" + child.name + "is not a state for charstatemachine")
			
func _physics_process(_delta):
	if(current_state.next_state != null):
		switch_states(current_state.next_state)
		
		
	current_state.state_process(_delta)

func check_if_can_move():
	return current_state.can_move

func switch_states(new_state : State):
	if (current_state != null):
		current_state.on_exit()
		current_state.next_state = null
	
	current_state = new_state
	
	current_state.on_enter()


func _input(event: InputEvent):
	current_state.state_input(event)

heres my code

[Mark_Caliwa_Velasco]

extends Label


@export var state_machine : charstatemachine

func _process(_delta):
	text = "state:" + state_machine.current_state.name

have to repeat this, got a problem

[tibaverus]

Your state machine is null, you didn’t set it in the inspector. Please show your inspector with that node selected.