# lerp() function not working

Attention Topic was automatically imported from the old Question2Answer platform.

I was trying to make the car movement a bit smother because now at the moment all it does is stops immediately. So I used the `lerp()` function but it doesn’t work? I have no clue as to what causes this but your help would be heavily appreciated.

``````extends KinematicBody2D

export var rotation_speed = 0.5

var shift = false
var rotation_dir = 0
var velocity = Vector2()

func _physics_process(delta):

rotation_dir = 0
velocity = Vector2()

if Input.is_action_pressed("shift up"):
speed = 500
elif Input.is_action_pressed("shift down"):
speed = 200

if Input.is_action_pressed("forward"):
velocity += Vector2(-speed, 0).rotated(rotation)
elif Input.is_action_pressed("back"):
velocity += Vector2(speed, 0).rotated(rotation)
else:
speed = 200
velocity.y = 0
#velocity = lerp(velocity.y, 0, 0.2)

if Input.is_action_pressed("left"):
rotation_dir -= 10
if Input.is_action_pressed("right"):
rotation_dir += 10

if velocity.y == 0:
rotation_speed = 0
else:
rotation_speed = 0.5

rotation += rotation_dir * rotation_speed * delta

move_and_slide(velocity)

velocity.y = lerp(velocity.y, 0, 0.2)
``````