如何循环列表中的下一项？

Question

我正在为一个统一项目构建墙放置脚本，您可以在其中放置 posts，如果 post 离另一个 post 足够近，墙将在两者之间实例化他们。我遇到的问题是循环列表中的对象以找到确定距离的 2 个对象，currentPost 和 previousPost。

[SerializeField]
private GameObject wall;
[SerializeField]
private GameObject post;

public GameObject currentPost;
public GameObject previousPost;

private List<GameObject> posts = new List<GameObject>();

private void Update()
{
    GetInput();
    Debug.Log(posts.Count);
    Debug.Log("Distance" + Distance());
}

private void AdjustWalls()
{   

    previousPost = posts[0]; //here is where I'm hoping to make the cycling change
    if(Distance() > 10)
    {
        Debug.Log("wall Placed");
    }
}

private void AddPosts()
{
    currentPost = ((GameObject)Instantiate(post, gridSnap(getWorldPoint()), Quaternion.identity));
    posts.Add(currentPost);
    AdjustWalls();       
}

private void GetInput()
{
    if (Input.GetKeyDown("q"))
    {
        AddPosts();
        currentPost.transform.parent = transform;
    }
}

public float Distance()
{
    return Vector3.Distance(currentPost.transform.position, previousPost.transform.position);
}

感谢任何帮助。

Answer 1

您不能在 AddPost 中执行此操作，而是执行以下操作并从 AdjustWalls() 中删除 previousPost = posts[0]; 行吗？:

private void AddPosts()
{
    if(currentPost != null)
    {
       previousPost = currentPost;
    }
    currentPost = ((GameObject)Instantiate(post, gridSnap(getWorldPoint()), Quaternion.identity));
    posts.Add(currentPost);
    AdjustWalls();       
}

如何循环列表中的下一项？

How can I cycle the next item in my list?

c#

unity3d

unity5