Question

目前我正在使用Unity和虚拟现实工具包（VRTK）开展项目。我想记录抓取对象的时间（用户抓取对象多长时间）。

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，即使我抓住对象的时间更长，这也不会有大约2毫秒的时间。所以似乎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

对象抓取功能可能只调用一次（当你抓住时）。它不启动计时器，只是将自上一帧以来的时间添加到变量中。如果仅调用一次，则只会将一帧的时间添加到Time变量。

你应该做的是在抓取对象>时注册，这样你就可以计算释放它时的总长度：

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

ObjectGrabbed方法可能仅在Grab操作发生时被触发，而不是每个帧都被抓取。因此，您应该使用一些Timer或StopWatch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());
}

如何获取抓取物体的时间？

2 个答案: