Invalid access to property or key '_mouse_input' on a base object of type 'Nil'.

R4L2E1

I don't know why my code is returning a null/nil value when the object its talking about is present and assigned somewhere:

mouse capture script:


@export var debug:bool = true
@export_category("Mouse Capture Settings")
@export var current_mouse_mode : Input.MouseMode = Input.MOUSE_MODE_CAPTURED
@export var mouse_sensitivity : float = 0.005
@export var camera_controller : CameraController
@export var _capture_mouse : bool
@export var _mouse_input : Vector2

func _unhandled_input(event: InputEvent) -> void:

	_capture_mouse = event is InputEventMouseMotion and Input.mouse_mode == Input.MOUSE_MODE_CAPTURED
	
	if _capture_mouse:
		_mouse_input.x += -event.screen_relative.x * mouse_sensitivity
		_mouse_input.y += -event.screen_relative.y * mouse_sensitivity
		
	if debug:
		print(_mouse_input)

func _ready() -> void:
	Input.mouse_mode = current_mouse_mode

func _process(_delta:float) -> void:
	_mouse_input= Vector2.ZERO

Camera controller script:


@export var debug :bool = true
@export_category("References")
@export var player_controller : PlayerController
@export var component_mouse_capture : MouseCaptureComponent
@export_category("Camera Settings")
@export_group("Camera Tilt")
@export_range(-90,-60) var tilt_lower_limit : int = -90
@export_range(60,90) var tilt_upper_limit : int = 90

var _rotation : Vector3

func _process(_delta: float) -> void:
	update_camera_rotation(component_mouse_capture._mouse_input)
	
func update_camera_rotation(input:Vector2) -> void:
	_rotation.x += input.y
	_rotation.y += input.x
	_rotation.x = clamp(_rotation.x, deg_to_rad(tilt_lower_limit),deg_to_rad(tilt_upper_limit))
	
	var _player_rotation = Vector3(0.0,_rotation.y,0.0)
	var _camera_rotation = Vector3(rotation.x,0.0,0.0)
	
	transform.basis = Basis.from_euler((_camera_rotation))
	player_controller.update_rotation(_player_rotation)
	
	_rotation.z = 0.0

could anyone maybe point me to the problem in my code?
also god damn adding the code here isn't working properly? (Now fixed, I'm dumb)

Toxe

R4L2E1 could anyone maybe point me to the problem in my code?

Where in your code does it return null? What's the exact error?

R4L2E1 also god damn adding the code here isn't working properly

It's just Markdown. Put your code inside ``` tags, like this:

```
# your code here
```

kuligs2

R4L2E1 func process(delta:float) -> void:
_mouse_input= Vector2.ZERO

where is logic behind this?

In the _unhandled you set the _mouse_input but then reset to zero in the _process function

R4L2E1

Toxe
Thanks for telling me how to properly add the code in, I'll fix that in a min
In the camera controller script, it's telling me that the _mouse_input in the upsate_camera_rotation function is pointing to an object type nil but it's defined in the mouse script.
I also tried removing the export function from the _mouse_input variable but it's not working with that either

Toxe

R4L2E1 Are you sure that the error is in update_camera_rotation and not in _process, and that component_mouse_capture isn't the thing that is null?

In _process, what is the output of a simple prints(component_mouse_capture, component_mouse_capture._mouse_input)?

It would be useful if you could show us the exact error message.

R4L2E1

Toxe
Thats the current error message, and when I try the print operation, the bug is the same but on the print operation instead, both of the errors calling _mouse_input on a base object of type nil

Toxe

R4L2E1 both of the errors calling _mouse_input on a base object of type nil

That base object is component_mouse_capture. That's the one that is null. You didn't assign a value to your export variable.

R4L2E1

Toxe
Do you have any suggestions on what I make it equal to, I'm quite new to this so I was following a tutorial and it just didn't work so I was confused.
Also thanks for bearing with me

Toxe

R4L2E1 Click on you camera controller node in your scene tree. Find the "Component Mouse Capture" property in the inspector and drag your MouseCaptureComponent node from your scene tree onto it. Now your export variable is connected and no longer null.

R4L2E1

Toxe
Thanks for the help! The y axis still isn't working but that was a different problem to this.