Hello !

I'm trying to make a 3d game with smooth movement (friction and acceleration) and so I need the player to "move less" when he is in the air. So I tried to make it like this :

if not is_on_floor():
		velocity.y -= gravity * delta
		friction = 0.025
		acceleration = 0.01
	else:
		friction = 0.1
		acceleration = 0.25

I do it the same way in 2D for having smooth jump / movement
But sadly it's not working realy well :
https://youtu.be/5c7FrkIIUwE

It's the first time i'm doing a game in 3d so I don't how to take/fix the issue
Thx for helping me

Here is the whole code by the way

extends CharacterBody3D

@onready var main_camera = $MainCamera

#Movement var
var SPEED = 0
var MAX_SPEED = 10
const JUMP_VELOCITY = 4.5
const gravity = 10
var acceleration = 0.25
var friction = 0.1

#Camera var
var camera_rotation = Vector2(0,0)
var mouse_sensitivity = 0.0025

func _ready():
	Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)

func _physics_process(delta):
	## MOVEMENT
	# Add the gravity.
	if not is_on_floor():
		velocity.y -= gravity * delta
		friction = 0.025
		acceleration = 0.01
	else:
		friction = 0.1
		acceleration = 0.25

	# Handle jump.
	if Input.is_action_just_pressed("jump") 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("move_left", "move_right", "move_forward", "move_back")
	var direction = (transform.basis * Vector3(input_dir.x, 0, input_dir.y)).normalized()
	if direction:
		SPEED += acceleration
		if SPEED > MAX_SPEED:
			SPEED = MAX_SPEED
		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)
		velocity.x = lerp(velocity.x, 0.0, friction)
		velocity.z = lerp(velocity.z, 0.0, friction)
		SPEED = 0

	move_and_slide()
	
	
func _input(event):
	if Input.is_action_just_pressed("echap"):
		Input.set_mouse_mode(Input.MOUSE_MODE_VISIBLE)
		
	##CAMERA
	if event is InputEventMouseMotion:
		var mouse_event = event.relative * mouse_sensitivity
		camera_look(mouse_event)
		
	
	
func camera_look(Movement: Vector2):
	camera_rotation += Movement
	camera_rotation.y = clamp(camera_rotation.y,-1.5,1.2)
	
	transform.basis = Basis()
	main_camera.transform.basis = Basis()
	
	rotate_object_local(Vector3(0,1,0), - camera_rotation.x) #first rotate y
	main_camera.rotate_object_local(Vector3(1,0,0), - camera_rotation.y) #rotate x
  • Toxe replied to this.

    TheMikega You set SPEED immediately to zero when you release a movement key when in the air.

        Toxe
        MB I missed some context : In the video im not releasing the key but pressing "S" (move_back) in the middle of the air.
        When i release all keys it work proprely and my speed start decreasing.
        It also stop movement mid air when I press "A" or "D"

        • Toxe replied to this.

            TheMikega Check in the following line if input_dir.y shouldn't be input_dir.z:

            var direction = (transform.basis * Vector3(input_dir.x, 0, input_dir.y)).normalized()

                Toxe OK ITS MY FAULT

                else:
		velocity.x = lerp(velocity.x, 0.0, friction)
		velocity.z = lerp(velocity.z, 0.0, friction)
		if is_on_floor():
			SPEED = 0

                I thought it was not a issue cause it work perfecly fine on ground
                you were right, the speed was reset to 0 when I release all keys, i'm sorry
                But, I still have no clue to how to make moving harder in air