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I am using Godot 4.3, it is giving me this error and when I change 0 to 0.0, the character stops moving. If I change the last parameter to an integer also it still shoots an error:

extends CharacterBody3D


var myVelocity = Vector3(0,0,0)
const SPEED = 6

func _ready() -> void:
    pass # Replace with function body.

func _physics_process(delta: float) -> void:
    
    if Input.is_action_pressed("ui_right") and Input.is_action_pressed("ui_left"):
        velocity.x = 0
    elif Input.is_action_pressed("ui_right"):
        myVelocity.x = SPEED
    elif Input.is_action_pressed("ui_left"):
        myVelocity.x = -SPEED
    else:
        myVelocity.z = lerp(myVelocity.z,0,0.1)

        
    if Input.is_action_pressed("ui_up") and Input.is_action_pressed("ui_down"):
        velocity.z = 0
    elif Input.is_action_pressed("ui_up"):
        myVelocity.z = -SPEED
    elif Input.is_action_pressed("ui_down"):
        myVelocity.z = SPEED
    else:
        myVelocity.z = lerp(myVelocity.z,0,0.1)

        
    velocity = myVelocity
    move_and_slide()
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  • \$\begingroup\$ I copy-pasted your code in a sample project and (after fixing the errors by replacing 0 with 0.0) it seems to work and the character moves fine. \$\endgroup\$ Commented Dec 2, 2024 at 15:46
  • \$\begingroup\$ Instead of lerping velocity.z to 0, How to Lerp Correctly explains why you probably want to use 1.0 - pow(0.5, delta * lerp_speed) instead of 0.1 as the last argument to lerp(). \$\endgroup\$ Commented Jan 3 at 2:07

1 Answer 1

Reset to default
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From the docs:

Both from and to must be the same type.

Since a Vector3's components are of type float the second argument to lerp also has to be a float: lerp(myVelocity.z, 0.0, 0.1).

As for this:

when i change 0 to 0.0, the character stops moving

If your character stops moving even when you are pressing a movement key that is probably due to some other bug. Try removing one piece of code at a time and see which piece of code is responsible for this behaviour.

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  • \$\begingroup\$ Thanks. I'll try it out \$\endgroup\$ Commented Dec 1, 2024 at 9:11
  • \$\begingroup\$ @zikorachimnefefredrick Did this answer solve your issue? If so, you should mark it as accepted. \$\endgroup\$ Commented Jan 4 at 16:13

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