嘗試從屏幕邊緣反彈時物體卡住了，我做錯了嗎？

Question

public class AsteroidMovement : MonoBehaviour
{

public Vector2 speed;
public Vector2 direction;
private Vector2 movement;

private Vector3 TopScreenBound;
private Vector3 BottomScreenBound;

// Use this for initialization
void Start()
{
    TopScreenBound = Camera.main.ViewportToWorldPoint(new Vector3(0f, 1f, 0f));
    BottomScreenBound = Camera.main.ViewportToWorldPoint(new Vector3(0f, 0f, 0f));
}

// Update is called once per frame
void Update()
{
    if (gameObject.transform.position.y >= TopScreenBound.y)
    {
        direction.y *= -1;
    }

    if (gameObject.transform.position.y <= BottomScreenBound.y)
    {
        direction.y *= -1;
    }

    movement = new Vector2(speed.x * direction.x, speed.y * direction.y);
}

void FixedUpdate()
{

    rigidbody2D.velocity = movement;
}
}

我正在嘗試讓游戲中的小行星從屏幕邊緣彈起，並且使它運行正常，但是經過幾次彈跳，小行星/物體會“卡在”牆壁上並出現故障。

我要解決這個錯誤嗎？ 我看不到代碼在幾次反彈后卡在小行星上的原因，謝謝:)

Answer 1

您必須固定對象的位置才能在屏幕內彈起，如果您的對象已經在屏幕外並且在下一幀中沒有完全進入屏幕空間，那么您的對象將無限地改變其方向，直到它進入或離開屏幕。

更改此：

if (gameObject.transform.position.y >= TopScreenBound.y)
{
    direction.y *= -1;
}

if (gameObject.transform.position.y <= BottomScreenBound.y)
{
    direction.y *= -1;
}

對此：

if (gameObject.transform.position.y >= TopScreenBound.y)
{
    gameObject.transform.position.y = TopScreenBound.y;
    direction.y *= -1;
}

if (gameObject.transform.position.y <= BottomScreenBound.y)
{
    gameObject.transform.position.y = BottomScreenBound.y;
    direction.y *= -1;
}