Cant move and jump at the same time. Only every couple frames you can jump.

Questions & Answers
1

For some reason my player cannot jump up and move left and right at the same time. Its wierd. Here is the controller script. This is a 2D Platformer.

public class PlayerController : MonoBehaviour
{
// Movement Settings
[Header(“Movement Settings:”)]
[Space]
[Range(1, 10)]
public float movementSpeed;
[Range(1, 10)]
public float jumpHeight;

private bool canJump;

// Components
private Rigidbody2D rigid;

void Start()
{
    // Set Components to their Corresponding Variables
    rigid = GetComponent<Rigidbody2D>();
}

void FixedUpdate()
{
    // Jumping
    if(canJump && Input.GetKeyDown(KeyCode.W))
    {
        rigid.AddForce(Vector2.up * jumpHeight, ForceMode2D.Impulse);
    }
}

void Update()
{
    // Movement Left or Right
    Vector3 moveDirection = new Vector3(Input.GetAxisRaw("Horizontal"), 0, 0);
    transform.Translate(moveDirection * movementSpeed * Time.deltaTime);

    // Check if Player is Grounded
    Vector2 groundCheckStart = new Vector2(transform.position.x, transform.position.y - 0.55f);
    Vector2 groundCheckEnd = new Vector2(transform.position.x, transform.position.y - 0.6f);

    Debug.DrawLine(groundCheckStart, groundCheckEnd, Color.red);

    RaycastHit2D groundCheck = Physics2D.Linecast(groundCheckStart, groundCheckEnd);

    if (groundCheck.collider != null)
    {
        canJump = true;
    }
    else
    {
        canJump = false;
    }
}

}

2

Hi @jakubshark,
I think the problem is that you’re getting Input from two different Update functions. Try moving everything to the FixedUpdate function.

Good Luck and Happy Coding!

3

Input should be retrieved in the Update() as it is cleared per frame, which is the frequency of the Update() method.

You should not get Input() in the FixedUpdate() as that one is usually only called every few frames. As you are triggering physics, you can store the fact that the player pressed jump and add the force in the next FixedUpdate.

I doubt that this single AddForce for jumping would behave badly when done in the Update(), so you could try that as well.