I cant get the player to face the direction moving

Unity Engine
,
1

I have a simple top-down game, with the use of the new Input system I allow the player to move but when I try to make him face the direction his is moving, for some reason the player never looks at the right direction no matter what values I had put in.

public float moveSpeed;
private Vector2 move;

public void OnMove(InputAction.CallbackContext context) {
    move = context.ReadValue<Vector2>();
}

private void Update() {
    // This is the movement which works fine
    Vector3 movement = new Vector3(move.x, move.y, 0f);
    transform.Translate(movement * moveSpeed * Time.deltaTime, Space.World);
 
    // This doesnt want to work
    transform.rotation = Quaternion.Slerp(transform.rotation, Quaternion.LookRotation(movement, Vector3.up),0.01f);
}

LookRotation needs a “forward” and a “up” arguments. The default is intended for 3D but I do it in 2D. When I press “D” the movement is equal (1, 0, 0) which is the +X direction, if I put +Z for the up direction, shouldnt it rotate on the Z axis. No.
No matter what I tried, It rotated on the other X and Y axis instead of the Z.

SOLUTION

This is what I did and It works fine:

if(movement.magnitude > 0)
            transform.rotation = Quaternion.LookRotation(Vector3.forward, movement) * Quaternion.Euler(0f, 0f, 90f);

And to smooth it I added Quaternion.Slerp(), like this:

Quaternion.Slerp(transform.rotation, Quaternion.LookRotation(Vector3.forward, movement) * Quaternion.Euler(0f, 0f, 90f), 0.1f);
2

In 2D, ‘up’ is generally into the screen, which us usually Vector3.forward (or the reverse).

Though the use of Quaternion.Slerp isn’t ideal. You might want to use Quaternion.RotateTowards instead.

3

I have put Vector3.forwards for the up direction, but it still rotated on the other axis. Quaternion.RotateTowards takes 2 Quaternions as arguments and in this case the movement is done with Vector3 “movement” that points to the moving direction. How could I write it with RotateTowards?

4

Quaternion.LookRotation returns a Quaternion. Just use that.