如何获取抓取对象的时间

Question

目前，我正在使用Unity和虚拟现实工具包(VRTK(进行一个项目。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，因为即使我抓住物体的时间更长，我也会得到大约 2 毫秒的时间。因此，似乎ObjectGrabbed()函数会启动计时器，但会立即停止它。

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(当你抓取时(。它不会启动计时器，它只是将自上一帧以来的时间添加到变量中。如果只调用一次，则只会将一帧的时间添加到Time变量中。

相反，您应该做的是记录何时抓取对象，以便您可以在释放对象时计算总长度：

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 方法仅在发生Grab操作时触发，而不是抓取对象的每一帧。因此，您可能应该使用一些Timer或StopWatch来设置代码(秒表具有更高的精度(。通过将计时器启动到 ObjectGrabbed 方法并将计时器停止到 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());
}