Another problem

ArDanZ11

extends Area2D

@onready var blue_streak: CharacterBody2D = $"."


# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	pass # Replace with function body.


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	pass


func _on_body_entered(body: Node2D) -> void:
	blue_streak.die()

I don't know what is happening, this is a die thing for this node and I don't know what is happening 😭😭😭

By the way, this is the error: Trying to assign value of type 'Area2D' to variable of type 'CharacterBody2D'.

DaveTheCoder

ArDanZ11 this is the error

The error message is self-explanatory. The variable blue_streak's type is CharacterBody2D, but the script extends a node of type Area2D.

But what's the point of $"." ?

Use:

func _on_body_entered(body: Node2D) -> void:
	self.die()

Or:

func _on_body_entered(body: Node2D) -> void:
	die()

ArDanZ11

DaveTheCoder

Here is the problem:

I was using a function from blue_streak, which is the plane. I used to do this, I don't know why it is not working, I am probably doing it wrong or leaving something out. The reason I couldn't figure it out is because I was trying to state a function from another node.

Edit: I think there was a confusion, this Area2D is an obstacle that is meant to kill the player when it is run into. It is separate from the player, which uses a CharacterBody2D.

MikeCL

ArDanZ11 Do you actually have a function named func die():?

if you are trying to remove the node when body entered, use queue_free()

I also wonder what this line is @onready var blue_streak: CharacterBody2D = $"."

DaveTheCoder

ArDanZ11

You have to provide the function "die" in your script. It's not a built-in function.

ArDanZ11

MikeCL

MikeCL I also wonder what this line is @onready var blue_streak: CharacterBody2D = $"."

That is the character.

MikeCL if you are trying to remove the node when body entered, use queue_free()

That is not what I am trying to do, This is an obstacle. When the character runs into it, I want the obstacle to trigger a function in the character's script die(). I have done similar things before, I don't know if it was updated or just deprecated.

MikeCL

ArDanZ11 Ah.. I see. Would it be possible to share a small minimal project with the issue? Easier to help debug that way.

ArDanZ11

DaveTheCoder You have to provide the function "die" in your script. It's not a built-in function.

I did provide on in another node, the way this works is that I have a function in a node, that node is stated in an @export variable, just like a label or a timer, and when you say timer.start() as a function in the node's built in script, it is like saying blue_streak.die().

I realize that I prabably should have included that information from the start of this topic, I'm sorry for causing this confusion, but I intend to fix it right here.

So you can understand the problem more, here are both scripts:

Obstacle:

extends Area2D

@onready var blue_streak: CharacterBody2D = $"."


# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	pass # Replace with function body.


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	pass


func _on_body_entered(body: Node2D) -> void:
	blue_streak.die()

Character:

extends CharacterBody2D

@onready var time_display: Label = $"time-display"
@onready var throttle_display: Label = $"throttle-display"
@onready var stopwatch: Timer = $stopwatch
@onready var explosion: AnimatedSprite2D = $explosion
@onready var death_message_timer: Timer = $"death-message-timer"
@onready var reset_timer: Timer = $"reset-timer"
@onready var death_message: Label = $"death-message"

var throttle = 0
var time=0
@onready var started=false

func _ready() -> void:
	explosion.hide()
	death_message.hide()

func _process(delta: float) -> void:
	
	if Input.is_action_just_pressed("throttle_up") and (started==false):
		stopwatch.start()
		started=true
	
	#throttle-handlers
	if Input.is_action_pressed("throttle_up"):
		throttle +=10
		started=true
	elif Input.is_action_pressed("throttle_down"):
		throttle-=10
	if(throttle < 0):
		throttle=0
	if(throttle > 500):
		throttle=500
	throttle_display.text="Speed: "+str(throttle)
	time_display.text="Time: "+str(time)
		

func _physics_process(delta: float) -> void:
	#speed-handler
	velocity.y=throttle
	
	move_and_slide()


func _on_time_timeout() -> void:
	time+=.5
	stopwatch.start()
	
func die():
	explosion.show()
	death_message_timer.start()


func _on_deathmessagetimer_timeout() -> void:
	death_message.show()
	reset_timer.start()


func _on_resettimer_timeout() -> void:
	get_tree().reload()

I hope this clears up any confusion.

DaveTheCoder

ArDanZ11 @onready var blue_streak: CharacterBody2D = $"."

Are you saying that statement is intended for the Area2D node to reference the CharacterBody2D node, so that the Area2D's script can call the CharacterBody2D's die() function?

If so, the statement is wrong, because "." is the path to the current node (the Area2D node), not the CharacterBody2D node.

I can't give you the correct path, because I don't know what your scene tree looks like.

MikeCL

ArDanZ11 Looking at the code. Seems that it should work (assuming blue_streak CharacterBody2D is a child of your Area2D node?).

Are you still getting the following error Trying to assign value of type 'Area2D' to variable of type 'CharacterBody2D'. ? Or is there something else?

DaveTheCoder If so, the statement is wrong, because "." is the path to the current node (the Area2D node), not the CharacterBody2D node.

Aah, you mean it's looking at the local base path instead of a node named . ... In that case, that variable is probably returning null? Never actually looked for a node named . . So, not sure what the behavior would be. But it makes sense that Godot would treat it like starting looking at the local base path from that node instead of a node itself.

ArDanZ11

DaveTheCoder Thanks, I will see what that does.

MikeCL Thanks.

DaveTheCoder

MikeCL Never actually looked for a node named .

"." is a valid node path. It's analogous to a file system reference using the current directory:
cd ./subdir

But it's usually redundant, since relative paths start at the current location anyway, so you don't need to use it explicitly. And in GDScript, in the rare cases where you need to reference the current node, you can use "self".

And in this case, it makes no sense, since the die() function is in a different node's script.

MikeCL

DaveTheCoder

DaveTheCoder "." is a valid node path

Yes, this is what I meant 🙂

ArDanZ11

DaveTheCoder Ok, how do I connect it to the node? I put @onready var blue_streak: CharacterBody2D = $"blue_streak" instead of @onready var blue_streak: CharacterBody2D = $".", now I get the error 'Cannot call function 'die' in base 'Null Instance' on a null instance', and I know what this means, it cannot connect the variable to the character, and I don't really know what the proper way to connect the two nodes is.

DaveTheCoder

ArDanZ11 I don't really know what the proper way to connect the two nodes is.

Until you reveal where your Area2D and CharacterBody2D nodes are in the scene tree, we're stuck. Is it a secret?

This is what a Scene Tree looks like:
https://docs.godotengine.org/en/4.6/getting_started/step_by_step/nodes_and_scenes.html#scenes

ArDanZ11

DaveTheCoder I figured it out, I have them both in the same test scene, so I just dragged the character into the script, and it worked fine.

I have another problem. This is what my character code looks like:

extends CharacterBody2D

@onready var time_display: Label = $"time-display"
@onready var throttle_display: Label = $"throttle-display"
@onready var stopwatch: Timer = $stopwatch
@onready var explosion: AnimatedSprite2D = $explosion
@onready var death_message_timer: Timer = $"death-message-timer"
@onready var reset_timer: Timer = $"reset-timer"
@onready var death_message: Label = $"death-message"
@onready var go: Label = $go

var throttle = 0
var time=0
var dead=false
@onready var started=false

func _ready() -> void:
	explosion.hide()
	death_message.hide()

func _process(delta: float) -> void:
	
	if Input.is_action_just_pressed("throttle_up") and (started==false):
		stopwatch.start()
		started=true
	if (dead==true) and (throttle>0) or (throttle==10) and (dead==true):
		throttle=0
	
	#throttle-handlers
	if Input.is_action_pressed("throttle_up"):
		throttle +=10
		started=true
	elif Input.is_action_pressed("throttle_down"):
		throttle-=10
	if(throttle < 0):
		throttle=0
	if(throttle > 500):
		throttle=500
	throttle_display.text="Speed: "+str(throttle)
	time_display.text="Time: "+str(time)
		

func _physics_process(delta: float) -> void:
	#speed-handler
	velocity.y=-throttle
	
	move_and_slide()


func _on_time_timeout() -> void:
	time+=.5
	stopwatch.start()
	
func die():
	explosion.show()
	death_message_timer.start()
	stopwatch.stop()
	dead=true


func _on_deathmessagetimer_timeout() -> void:
	death_message.show()
	reset_timer.start()
	go.text="go"





func _on_resettimer_timeout() -> void:
	get_tree().reload()
	go.text="you did die, restart"

This is what my scene-tree looks like:

The last timer either isn't firing when the second death timer says start() or it is not running the functions. I don't know which, I am about to run a test with labels and matching it to the timer.

Edit:

Nevermind, I don't need the timer, I just make both the explosion and death message show up at the same time and use the death message timer to reload the scene. The other time is useless, I am getting rid of it.