confusing error message

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1

Godot Version

Godot 4.6

Question

I’m a bit new to coding, so this might be a stupid question but…

whenever I try to run the application, I get the error message

E 0:00:00:451 _physics_process: Invalid operands ‘float’ and ‘Nil’ in operator ‘*’.
player.gd:55 @ _physics_process()
player.gd:55 @ _physics_process()

even though there’s no red lines in my code, it seems to be at line 55, but the rest is baffling.

This is my code:

extends CharacterBody3D

## The movement speed in m/s. Default is 5.
#@export_range(1.0,30.0) var speed : float = 5.0
@export_range(1.0,30.0) var speed : float = 5
## The Jump Velocity in m/s- default to 6.0
@export_range(2.0,10.0) var jump_velocity : float = 6.0

## Mouse sensitivity for looking around. Default is 3.0
@export_range(1.0,5.0) var mouse_sensitivity = 3.0
var mouse_motion : Vector2 = Vector2.ZERO
var pitch = 0

## The amount of acceleration on the ground- less feels floaty, more is snappy-[br]Default is 4
@export_range(1.0,10.0) var ground_acceleration := 4.0
## the amount of acceleration when in the air. less feels more floaty more is more snappy.[br]Default is 0.5
@export_range(0.0,5.0) var air_acceleration := 0.5

# Get the gravity from the project settings to be synced with RigidBody nodes.
@export_range(5.0,25.0) var gravity : float = 15.0

# the camera pivot for head pitch movement
@onready var camera_pivot : Node3D = $CameraPivot

func _physics_process(delta):
	# Add the gravity.
	if not is_on_floor():
#		velocity.y -= gravity * delta
		velocity.y -= gravity * delta
	# Handle Jump.
#	if Input.is_action_just_pressed("ui_accept") and is_on_floor():
#		velocity.y = jump_velocity
	if Input.is_action_just_pressed("ui_accept") and is_on_floor():
		velocity.y = jump_velocity

	# Get the input direction and handle the movement/deceleration.
	# As good practice, you should replace UI actions with custom gameplay actions.
#	var input_dir = Input.get_vector("ui_left", "ui_right", "ui_up", "ui_down")
	var input_dir = Input.get_vector("ui_left", "ui_right", "ui_up", "ui_down")
	var direction = (transform.basis * Vector3(input_dir.x, 0, input_dir.y))
	var target_velocity := Vector3.ZERO
	if direction:
		target_velocity = direction
	#now apply velocity with lerp based on whether on ground or in air
	if is_on_floor():
		velocity.x = move_toward(velocity.x , target_velocity.x * speed , speed * ground_acceleration * delta)
		velocity.z = move_toward(velocity.z, target_velocity.z * speed, speed * ground_acceleration * delta)
	else:
		velocity.x = move_toward(velocity.x , target_velocity.x * speed , speed * air_acceleration * delta)
		velocity.z = move_toward(velocity.z, target_velocity.z * speed, speed * air_acceleration * delta)
	#now actually move based on velocity
	move_and_slide()
	
	#rotate the player and camera pivot based on mouse movement
	rotate_y(-mouse_motion.x * mouse_sensitivity / 1000)
	pitch -= mouse_motion.y * mouse_sensitivity / 1000
	pitch = clampf(pitch,-1.35,1.35)
	camera_pivot.rotation.x = pitch
	#reset it
	mouse_motion = Vector2.ZERO
	


#haif le and store mouse motion
func _input(event: InputEvent):
	if event is InputEventMouseMotion:
		mouse_motion = event.relative

#if you click the flag to the next level
	var d_flag = global_position.distance_to(%flag.global_position)
	if Input.is_action_just_pressed("ui_left_click") and d_flag <= 5:
		get_tree().change_scene("lvl_1.tscn")
2

Which line in your posted code is line 55?

Btw, editor can redline only the compile time errors, like obvious syntax errors and type mismatches. Some errors can only be detected at runtime though, as there’s no enough information to catch them prior to executing the problematic code.

3

For what it’s worth, I ran the code (inside an otherwise empty scene) and didn’t get the error you’re getting.

Line 55 is this code: rotate_y(-mouse_motion.x * mouse_sensitivity / 1000) and it’s quite unlikely that there’s a null reference in this multiplication. Are you changing mouse_sensitivity in some other script?

4

try this

func _physics_process(delta:float) -> void:
    pass