koobas.hobune.stream
Update vs FixedUpdate - Ruby2D and Jitter
Hi, I am new to unity and I am going through the Ruby project on Unity Learn. I've been following along with the but been noticing an issue with jitter in regards to moving both the bot and ruby.
I've taken a video which can be seen here: Link
The movement function for ruby is as follows
void Update() { float horizontal = Input.GetAxis("Horizontal"); float vertical = Input.GetAxis("Vertical"); Vector2 position = rigidbody2d.position; position.x = position.x + speed * horizontal * Time.deltaTime; position.y = position.y + speed * vertical * Time.deltaTime; rigidbody2d.MovePosition(position); if (isInvincible) { invincibleTimer -= Time.deltaTime; if (invincibleTimer < 0) { isInvincible = false; } } }
A solution I found was changing the update method to the fixed update. Doing this I end up with much smoother input as can be seen here: Link
As I am new to unity I am unsure whether the solution is correct. While it seems to work am I just applying a band-aid to fix a more serious underlying issue? Or is the tutorial incorrect with regards to rigidbody movement? If it is incorrect why is it wrong to use motion in update() method?
Any help would be greatly appreciated!
