我的对象在 Unity 中取消捕捉对象的错误答案

【问题标题】：Bug with my object un-snapping objects in Unity我的对象在 Unity 中取消捕捉对象的错误
【发布时间】：2019-03-06 07:38:00
【问题描述】：

我在测试场景中有基本的对象捕捉，但是当我取消捕捉对象时，捕捉的对象将重新捕捉，除非我很快将其移开。对于场景设置的上下文，我想在 VR 中实现捕捉对象，因此我在要移动的对象内有一个较小的父对象，以表示该对象将在 VR 中作为父对象的手。此外，我将捕捉脚本（下面的第一个）附加到“手”对象，并在手上使用触发对撞机和它附加到的方形 obj。

有什么办法可以解决这个问题，这样我就不需要快速拉动来解耦对象了吗？

Video of the bug happening

下面是我用来实现这个的脚本

    public class snap : MonoBehaviour, collider_helper.collider_help_reciever
{
    public Transform snapObj;
    public Transform SnapTarget;
    bool snapped = false;

    // Use this for initialization
    void Start () {

    }

    // Update is called once per frame
    void Update () {

    }

    public void OnTriggerEnter (Collider other)
    {
        Debug.Log("enter");
        if (snapped == false && other.transform.GetInstanceID() == SnapTarget.GetInstanceID())
        {
            snapObj.position = SnapTarget.position;
            snapObj.rotation = SnapTarget.rotation;
            snapObj.parent = SnapTarget;
            snapped = true;
        }
    }
    public void OnTriggerExit(Collider other)
    {

        Debug.Log("exit");
        if (snapped == true && other.transform.GetInstanceID() == SnapTarget.GetInstanceID())
        {
            snapObj.position = transform.position;
            snapObj.rotation = transform.rotation;
            snapObj.parent = transform;
            snapped = false;
            StartCoroutine(noSnap);
        }
    }
}

    public class collider_helper : MonoBehaviour {
    public GameObject recieving;
    collider_help_reciever reciever;
    // Use this for initialization
    void Start () {
        reciever = recieving.GetComponent<collider_help_reciever>();
    }

    // Update is called once per frame
    void Update () {

    }

    void OnTriggerStay (Collider other)
    {
        reciever.OnTriggerEnter(other);
    }
    public interface collider_help_reciever
    {
        void OnTriggerEnter(Collider other);
    }

}

【问题讨论】：

标签： c# unity3d scripting

【解决方案1】：

答案是添加一个浮点数 (lastSnapTime) 来存储对象上次解耦的时间，并且仅在自上次解耦后经过一段时间后才允许发生捕捉：

    public void OnTriggerEnter(Collider other)
{
    Debug.Log("enter");
    if (other.transform.GetInstanceID() == SnapTarget.GetInstanceID())
    {
        if (lastSnapTime + 0.1f < Time.time)
        {
            snapObj.position = SnapTarget.position;
            snapObj.rotation = SnapTarget.rotation;
            snapObj.parent = SnapTarget;
        }
    }
}
public void OnTriggerExit(Collider other)
{

    Debug.Log("exit");
    if (other.transform.GetInstanceID() == SnapTarget.GetInstanceID())
    {
        lastSnapTime = Time.time;
        snapObj.position = transform.position;
        snapObj.rotation = transform.rotation;
        snapObj.parent = transform;
        //StartCoroutine(noSnap);
    }
}

【讨论】：