2D Movement unintentionally drifting

Help
,
1

Godot Version

4.3

Question

Hi guys

need a bit help here, my character’s movement behaviour is very weird here

in the video, I always only press one button at a time (W, A, S, D) but as seen in the vid, somehow if I change direction (from vertical to horizontal) it will kind of ‘drift’ a little bit

anyone know the solution to the issue?

this is the recording of that weird movement
this is the link to the project

this is the code controlling the movement


func get_movement_vector() -> Vector2:
    var x_movement = Input.get_action_strength("move_right") - Input.get_action_strength("move_left")
    var y_movement = Input.get_action_strength("move_down") - Input.get_action_strength("move_up")
    
    return Vector2(x_movement, y_movement)

and this is where the movement take place

func physics_update(delta: float) -> void:
    # get movement direction
    var movement_vector = movement_component.get_movement_vector()
    var direction = movement_vector.normalized()
    
    # Apply movement direction
    var target_velocity = direction * MAX_SPEED
    parent.velocity = parent.velocity.lerp(target_velocity, 1 - exp(-delta * ACCELERATION_SMOOTHING))
    
    parent.move_and_slide()
    
    # check if should transition to other state
    if movement_vector.x == 0 and movement_vector.y == 0:
        transaitioned.emit(self, Constants.State.IDLE)
2

My guess is Lerp is a percentage change so it will go really slow when the difference is small. Alternatives is parent.velocity.move_towards() with a Curve class.

2 Likes