koobas.hobune.stream
2D: Why does my character stutter if I add deltaTime to moveSpeed?
So I'm following a tutorial on youtube, first time Unity user, but been making games in other frameweorks before. In the tutorial he does not use deltaTime for movement, which has always been the standard for me, so I added it my self, but it makes my character "stutter/lag" really weirdly (does not stutter without deltaTime). Should I not use deltaTime for movement in Unity?
Script for Player movement:
void Update () {
playerMoving = false;
if (!playerAttacking) {
Vector2 direction = new Vector2();
if (Mathf.Abs (Input.GetAxisRaw ("Horizontal")) > 0.5f) {
Debug.Log ("Moving on X");
playerMoving = true;
direction.x = Input.GetAxisRaw ("Horizontal");
lastMove.x = direction.x;
lastMove.y = 0;
}
if (Mathf.Abs (Input.GetAxisRaw ("Vertical")) > 0.5f) {
Debug.Log ("Moving on Y");
playerMoving = true;
direction.y = Input.GetAxisRaw ("Vertical");
lastMove.y = direction.y;
lastMove.x = 0;
}
if (playerMoving) {
myRigidBody.velocity = direction.normalized * moveSpeed * Time.deltaTime;
} else {
myRigidBody.velocity = Vector2.zero;
}
}
Physics in games should generally happen in FixedUpdate.
Basically, create a new function titled FixedUpdate, cut your m_Rigidbody.velocity setting into FixedUpdate, swap Time.deltaTime out for Time.fixedDeltaTime, and keep the deciding of the velocity (i.e. the calculations to determine direction) in Update.
