unity2d 中的 WASD 运动

Question

I'm new to unity and wanted to know how can i set the A and D keys to move me right and left with Rigidbody2D . I found this script on a forum but it doesn't seem to work:

public float speed = 5f;
private float movement = 0f;
private Rigidbody2D rigidBody;
// Use this for initialization
void Start()
{
    rigidBody = GetComponent<Rigidbody2D>();
}

// Update is called once per frame
void Update()
{
    movement = Input.GetAxis("Horizontal");
    if (movement > 0f)
    {
        rigidBody.velocity = new Vector2(movement * speed, rigidBody.velocity.y);
    }
    else if (movement < 0f)
    {
        rigidBody.velocity = new Vector2(movement * speed, rigidBody.velocity.y);
    }
    else
    {
        rigidBody.velocity = new Vector2(0, rigidBody.velocity.y);
    }
}

Answer 1

Is there an error being thrown?
First thing to check is that whatever you have attached this script to actually has a Rigidbody2D .

Physics, ie setting rigidbody speeds, should be done in FixedUpdate rather than Update , if you look that up and it seems too confusing right now don't worry, you can get away with this for now.

Perhaps you should try using rb.AddForce(movement * speed, ForceMode2D.Impluse); .

Since the var movement will actually be positive or negative depending on what key you press, the first two bits of the if statements don't have any use.

Try out looking at this for a single tutorial about moving the player.