在void中用Vector2.MoveTowards向下移动对象。

Question

所以，我的这段代码有点问题。

private void ReDeal()
{
    if (!userInput.first)
    {
        userInput.FirstSelected(GameObject.Find(bottoms[0][0]));
        bottoms[0].Remove(userInput.slot1.name);
        GameObject cardToDestroy = GameObject.Find(userInput.slot1.name);

        //Move card down before destroy

        Destroy(cardToDestroy);



        bottoms[0].Add(deck.Last<string>());
        deck.RemoveAt(deck.Count - 1);
    }
}

目前，它的工作原理是这样的，游戏对象（cardToDestroy）被摧毁了。我想做的是将Gameobject按Y轴向下移动，使其从屏幕上 "滑落"，然后将其销毁。尝试用while循环和Vector2.MoveTowards或Vector2.Lerp来实现，但没有成功。我似乎无法让MoveTowards在VOID中工作。

Answer 1

好吧，我实际上解决了这个问题，我用while循环创建了一个IEnumerator。

IEnumerator MoveCard(GameObject card, int cardIndex)
{
    Vector2 startPosition = card.transform.position;
    Vector3 stopPOsition = new Vector2(startPosition.x, startPosition.y - 4);
    while(Vector2.Distance(card.transform.position, stopPOsition) > 0.1f)
    {
        float step = 10f * Time.deltaTime;
        card.transform.position = Vector2.MoveTowards(card.transform.position, stopPOsition, step);
        yield return null;
    }

    Destroy(card);


}

然后我在ReDeal()void中调用这个IEnumerator作为Coroutine。

private void ReDeal()
{
    if (!userInput.first)
    {
        userInput.FirstSelected(GameObject.Find(bottoms[0][0]));
        bottoms[0].Remove(userInput.slot1.name);
        GameObject cardToDestroy = GameObject.Find(userInput.slot1.name);

        StartCoroutine(MoveCard(cardToDestroy, 0));


    }
}

Answer 2

你可以通过使用coroutine来实现这个效果。

private void ReDeal()
{
    if (!userInput.first)
        {
            userInput.FirstSelected(GameObject.Find(bottoms[0][0]));
            bottoms[0].Remove(userInput.slot1.name);
            GameObject cardToDestroy = GameObject.Find(userInput.slot1.name);
        //Move card down before destroy
        StartCoroutine(Destroy());

        bottoms[0].Add(deck.Last<string>());
        deck.RemoveAt(deck.Count - 1);
    }
}

private float movementFactor = 1.0f;
private float maximumDistance = 15f;        

private IEnumerator Destroy(GameObject go, float distance)
        {
            float accumulatedDistance = 0;
            float go_x = go.transform.position.x;
            float go_z = go.transform.position.z;
            if (accumulatedDistance < distance)
            {
                go.transform.position -= new Vector3(0,movementFactor,0);
                yield return null;
            }

        Destroy(go);
    }

Answer 3

对于这种事情，你最好的朋友就是Coroutine。

IEnumerator SlideAndDestroy(Card cardToDestroy)
{
    float velocity = -1;
    while(transform.position.y > offscreenDistance)
    {
        transform.position += new Vector3(0, velocity * Time.deltaTime, 0);
        yield return new WaitForSeconds(Time.deltaTime);
    }
    Destroy(cardToDestroy);
    yield return null;
}

然后在你想销毁你的卡的地方

StartCoroutine(SlideAndDestroy(cardToDestroy));