Snap 2D Transforms to Pixel causes one-time jitter on first movement

[EntirePegasus]

Godot Version

4.2.1

Question

In this clip, the character snaps to the left after moving for the first time and then does not jitter anymore afterwards. Any ideas how to fix this?

Godot

[wchc]

It looks like it’s moving 1 pixel to the left.
Can you show your code? Do you have any snapping methods implemented? Is your character placed correctly? What if you move it a few pixels into the air, maybe it’s clipping the floor?

[EntirePegasus]

@wchc

Here is a simplified version of the code (the problem still occurs with this code)

extends CharacterBody2D

const MAX_SPEED : float = 200

var gravity : float = 400

var acceleration: float = 1
var deceleration: float = 20

var character_direction : int = 0

enum State {Idle, Run, Jump, Vault}
var current_state : State = State.Idle

@onready var sprite : Sprite2D = $Sprite

func _physics_process(delta : float):
	if !is_on_floor():
		velocity.y += gravity * delta
		
	var direction = Input.get_axis("left", "right")
	
	if direction:
		current_state = State.Run
		if direction == sign(velocity.x):
			velocity.x = move_toward(velocity.x, MAX_SPEED * direction, acceleration)
		else: 
			velocity.x = move_toward(velocity.x, MAX_SPEED * direction, deceleration)
			
		flip_character(direction)
	else:
		velocity.x = move_toward(velocity.x, MAX_SPEED * direction, deceleration)

	move_and_slide()
	
	
func flip_character(direction : int):
	sprite.flip_h = false if direction > 0 else true
	character_direction = 1 if not sprite.flip_h else -1

I have not implemented any snapping methods myself, I’m just using the setting “Snap 2D Transforms to Pixel” and the problem does go away when I disable that (I do want to keep it enabled though)

I also did what you said and moved the character in the air and set gravity to 0 to see if the floor is causing it but the problem still happened even when moving in the air

Here’s more context just in case:
Viewport Width: 320
Viewport Height: 180
Window Width Override: 1280
Window Height Override: 720
Stretch Mode: viewport
Scale Mode: integer
Character Collision Size: 7 x 14

[wchc]

Maybe you can try the workaround mentioned in this vid?

Camera Jittering with Godot 4.3 using the "Snap 2D Transforms to Pixel" option, includes workaround

[EntirePegasus]

I updated to the latest version of Godot (4.4.1) and I’m not having the problem anymore. Thanks for the help though @wchc !