如何获得物体被抓取多长时间的时间？

Question

目前我正在使用 Unity 和虚拟现实工具包 (VRTK) 开发一个项目。我想记录抓取对象的时间（用户抓取对象的时间）。

到目前为止我得到了这个：

using System;
using System.Linq;
using System.Text;
using System.IO;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using VRTK;

public class System_2_Script_Slider_X : MonoBehaviour
{
    float Timer;

    void Start()

    {
        Timer = 0;

        if (GetComponent<VRTK_InteractableObject>() == null)
        {
            Debug.LogError("Team3_Interactable_Object_Extension is required to be attached to an Object that has the VRTK_InteractableObject script attached to it");

            return;
        }

        GetComponent<VRTK_InteractableObject>().InteractableObjectGrabbed += new InteractableObjectEventHandler(ObjectGrabbed);

        GetComponent<VRTK_InteractableObject>().InteractableObjectUngrabbed += new InteractableObjectEventHandler(ObjectUngrabbed);
    }

    private void ObjectGrabbed(object sender, InteractableObjectEventArgs e)

    {
        //Some Code

        Timer += Time.deltaTime;
    }

    private void ObjectUngrabbed(object sender, InteractableObjectEventArgs e)

    {
        //Some Code

        File.AppendAllText("PATH/Timer.txt", Timer.ToString());

        Timer = 0;
    }
}

不幸的是，这不起作用，因为我得到了大约 2 毫秒的时间，即使我抓住物体的时间更长。所以看起来 ObjectGrabbed() 函数启动计时器但立即停止它。

我该如何解决这个问题？

Answer 1

对象抓取函数可能只调用一次（当您抓取时）。它不会启动计时器，它只是将自上一帧以来的时间添加到您的变量中。如果只调用一次，只会将一帧的时间加到Time变量中。

你应该做的是记录物体被抓取的时间，这样你就可以在它被释放时计算总长度：

using System;
using System.Linq;
using System.Text;
using System.IO;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using VRTK;

public class System_2_Script_Slider_X : MonoBehaviour
{
    private float _timeWhenGrabbed;

    void Start()
    {
        if (GetComponent<VRTK_InteractableObject>() == null)
        {
            Debug.LogError("Team3_Interactable_Object_Extension is required to be attached to an Object that has the VRTK_InteractableObject script attached to it");

            return;
        }

        GetComponent<VRTK_InteractableObject>().InteractableObjectGrabbed += new InteractableObjectEventHandler(ObjectGrabbed);

        GetComponent<VRTK_InteractableObject>().InteractableObjectUngrabbed += new InteractableObjectEventHandler(ObjectUngrabbed);
    }

    private void ObjectGrabbed(object sender, InteractableObjectEventArgs e)

    {
        //Some Code

        _timeWhenGrabbed = Time.time;
    }

    private void ObjectUngrabbed(object sender, InteractableObjectEventArgs e)

    {
        //Some Code
        var grabDuration = Time.time - _timeWhenGrabbed;
        File.AppendAllText("PATH/Timer.txt", grabDuration.ToString());
    }
}

Answer 2

可能 ObjectGrabbed 方法仅在 Grab 动作发生时触发，而不是对象被抓取的每一帧。因此，您可能应该使用一些 Timer 或 StopWatch 来设置您的代码（秒表具有更高的精度）。通过启动定时器进入ObjectGrabbed方法，停止定时器进入ObjectUngrabbed方法。
像这样：

using System.Diagnostic.Stopwatch;
...
private StopWatch Watcher = new StopWatch();
...
private void ObjectGrabbed(object sender, InteractableObjectEventArgs e)
{
    Watcher.Start();
}

private void ObjectUngrabbed(object sender, InteractableObjectEventArgs e)
{
    Watcher.Stop();
    long millis = Watcher.ElapsedMilliseconds;
    Watcher.Reset();
    File.AppendAllText("PATH/Timer.txt", millis.ToString());
}

如何获得物体被抓取多长时间的时间？

How to get time of how long an object is grabbed?

c#

unity3d

vrtk