using rb.MovePosition bugs the y position

Questions & Answers
1

I have a ball that has a rigidbody and a circle collider on it. I have the following script applied to it:

public class PlayerController : MonoBehaviour
{
    [SerializeField] float speed = 400f;

    Rigidbody2D rb;

    void Start()
    {
        rb = GetComponent<Rigidbody2D>();
    }

    void Update()
    {
        float move = Input.GetAxis("Horizontal") * Time.deltaTime * speed;

        rb.MovePosition(rb.position + new Vector2(move, 0f));
    }
}

The ball is in mid air in the scene. When I hit play, the ball falls but it doesn’t fall quickly like it did without me writing “rb.MovePosition” method. What’s the problem and how can I fix this?

Thanks

2

Try this

void FixedUpdate()
{
    float move = Input.GetAxis("Horizontal") * speed;

    rb.velocity = new Vector2(move, rb.velocity.y);
}

Since you’re using a rigidbody operation, you don’t need delta time. Also, you can now lower your speed to something much less, like 20f.