Gravity increases when mouse moves (3D FPS)

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1

Godot Version

4.6.2.stable (steam)

Question

I’m trying to code for an FPS game but every time my character jumps, it starts flying at an extremely low gravity rate. if i move my mouse, the gravity becomes higher. How do i fix this?

extends CharacterBody3D

const SPEED = 7.0
const JUMP_VELOCITY = 8
const SENSITIVITY =0.005


@onready var head = $Node3D
@onready var camera = $Node3D/Camera3D

var doublejump = false

func _ready():
	for child in $Node3D.find_children("*", "VisualInstance3D") :
		child.set_layer_mask_value(1, false)
		child.set_layer_mask_value(2, true)
	

func _unhandled_input(event):
	if event is InputEventMouseMotion: 
		head.rotate_y(-event.relative.x * SENSITIVITY) 
		camera.rotate_x(-event.relative.y * SENSITIVITY)
		camera.rotation.x =clamp(camera.rotation.x, deg_to_rad(-90), deg_to_rad (90))
 
	
		

	
	if not is_on_floor():
		velocity += get_gravity() * 0.03
	else: doublejump = false
	
	
	if Input.is_action_just_pressed("jump") and (is_on_floor()or !doublejump):
		velocity.y = JUMP_VELOCITY
	
	
		
	
	if Input.is_action_just_pressed("jump") and !is_on_floor(): 
		doublejump = true
	


func _physics_process(_delta: float) -> void:
	var input_dir := Input.get_vector("left", "right", "forward", "backward")
	var direction = (head.transform.basis * Vector3(input_dir.x, 0, input_dir.y)).normalized()
	if direction:
		velocity.x = direction.x * SPEED
		velocity.z = direction.z * SPEED
	else:
		velocity.x = move_toward(velocity.x, 0, SPEED)
		velocity.z = move_toward(velocity.z, 0, SPEED)

	move_and_slide()
2

Apply gravity in _physics_process(), not in _unhandled_input().

Also, you should use the event parameter instead of the Input singleton inside _unhandled_input().
event.is_action_pressed("jump") instead of Input.is_action_just_pressed("jump").

3

Thank you!

The gravity is fixed but trying to change Input to event seems to make the game crash.

4

Do you get any error messages?

5

E 0:00:01:617 _unhandled_input: Invalid call. Nonexistent function ‘is_action_just_pressed’ in base ‘InputEventMouseMotion’.
character_body_3d.gd:32 @ _unhandled_input()
character_body_3d.gd:32 @ _unhandled_input()

6

Yeah, it should be

event.is_action_pressed()

and not

event.is_action_just_pressed()

Only Input has to differentiate between the action being pressed or just pressed, because it is meant to be used in functions like _physics_process().

_unhandled_input() is only callled when any input happens, so any pressed event is always just pressed.

1 Like
7

It worked, Thank you!