VR开发中尝试使用Coroutine激活和去激活场景中的物体

Question

我正在设计一款 VR 游戏，并尝试制作一个附加到左侧控制器的菜单。我有两个按钮，一个用于激活场景中的一些对象，另一个用于将玩家带到不同的场景。

我一直在查看 SteamVR 交互式示例，并试图模仿他们在示例场景中使用的按钮。除了在示例中，他们使用协程在控制器上启动不同的提示，因此他们使用 Hand 类。我只是想用它来激活和停用对象以及更多到不同的场景。

为了说明清楚，这些是我想要实现的目标：

1. 当用户点击第一个按钮时，激活通过 Unity 中的 Inspector 选项卡指定的对象 (obj1)。
2. 当用户点击第二个按钮时，停用对象 (obj1) 并移动到不同的场景。

这是示例场景中的 C# 代码。它有三个按钮，它们可以激活“按钮提示”或“文本提示”：

//======= Copyright (c) Valve Corporation, All rights reserved. ===============
//
// Purpose: Demonstrates the use of the controller hint system
//
//=============================================================================

using UnityEngine;
using System.Collections;
using Valve.VR;

namespace Valve.VR.InteractionSystem
{
    //-------------------------------------------------------------------------
    public class ControllerHintsExample : MonoBehaviour
    {
        private Coroutine buttonHintCoroutine;
        private Coroutine textHintCoroutine;

        //-------------------------------------------------
        public void ShowButtonHints( Hand hand )
        {
            if ( buttonHintCoroutine != null )
            {
                StopCoroutine( buttonHintCoroutine );
            }
            buttonHintCoroutine = StartCoroutine( TestButtonHints( hand ) );
        }


        //-------------------------------------------------
        public void ShowTextHints( Hand hand )
        {
            if ( textHintCoroutine != null )
            {
                StopCoroutine( textHintCoroutine );
            }
            textHintCoroutine = StartCoroutine( TestTextHints( hand ) );
        }


        //-------------------------------------------------
        public void DisableHints()
        {
            if ( buttonHintCoroutine != null )
            {
                StopCoroutine( buttonHintCoroutine );
                buttonHintCoroutine = null;
            }

            if ( textHintCoroutine != null )
            {
                StopCoroutine( textHintCoroutine );
                textHintCoroutine = null;
            }

            foreach ( Hand hand in Player.instance.hands )
            {
                ControllerButtonHints.HideAllButtonHints( hand );
                ControllerButtonHints.HideAllTextHints( hand );
            }
        }


        //-------------------------------------------------
        // Cycles through all the button hints on the controller
        //-------------------------------------------------
        private IEnumerator TestButtonHints( Hand hand )
        {
            ControllerButtonHints.HideAllButtonHints( hand );

            while ( true )
            {
                ControllerButtonHints.ShowButtonHint( hand, EVRButtonId.k_EButton_ApplicationMenu );
                yield return new WaitForSeconds( 1.0f );
                ControllerButtonHints.ShowButtonHint( hand, EVRButtonId.k_EButton_System );
                yield return new WaitForSeconds( 1.0f );
                ControllerButtonHints.ShowButtonHint( hand, EVRButtonId.k_EButton_Grip );
                yield return new WaitForSeconds( 1.0f );
                ControllerButtonHints.ShowButtonHint( hand, EVRButtonId.k_EButton_SteamVR_Trigger );
                yield return new WaitForSeconds( 1.0f );
                ControllerButtonHints.ShowButtonHint( hand, EVRButtonId.k_EButton_SteamVR_Touchpad );
                yield return new WaitForSeconds( 1.0f );

                ControllerButtonHints.HideAllButtonHints( hand );
                yield return new WaitForSeconds( 1.0f );
            }
        }


        //-------------------------------------------------
        // Cycles through all the text hints on the controller
        //-------------------------------------------------
        private IEnumerator TestTextHints( Hand hand )
        {
            ControllerButtonHints.HideAllTextHints( hand );

            while ( true )
            {
                ControllerButtonHints.ShowTextHint( hand, EVRButtonId.k_EButton_ApplicationMenu, "Application" );
                yield return new WaitForSeconds( 3.0f );
                ControllerButtonHints.ShowTextHint( hand, EVRButtonId.k_EButton_System, "System" );
                yield return new WaitForSeconds( 3.0f );
                ControllerButtonHints.ShowTextHint( hand, EVRButtonId.k_EButton_Grip, "Grip" );
                yield return new WaitForSeconds( 3.0f );
                ControllerButtonHints.ShowTextHint( hand, EVRButtonId.k_EButton_SteamVR_Trigger, "Trigger" );
                yield return new WaitForSeconds( 3.0f );
                ControllerButtonHints.ShowTextHint( hand, EVRButtonId.k_EButton_SteamVR_Touchpad, "Touchpad" );
                yield return new WaitForSeconds( 3.0f );

                ControllerButtonHints.HideAllTextHints( hand );
                yield return new WaitForSeconds( 3.0f );
            }
        }
    }
}

这就是我所拥有的示例代码的类似副本。我一直在搞清楚对象激活，还没有接触到场景变化：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
using Valve.VR;

namespace Valve.VR.InteractionSystem
{
    //................................................
    public class HandMenueActions : MonoBehaviour
    {
        public GameObject AllProducts;

        private Coroutine allProductsCoroutine;
        private Coroutine aboutUsCoroutine;

        //............................................
        public void ShowAllProducts(GameObject AllProducts)
        {
            if (allProductsCoroutine != null)
            {
                StopCoroutine(allProductsCoroutine);
            }
            allProductsCoroutine = StartCoroutine(TestAllProducts);
        }


        //............................................
        //Turns on all products in the scene
        //............................................
        private IEnumerable TestAllProducts()
        {
            AllProducts.SetActive(true);
        }
    }

我没有那么有经验，我尝试编写代码以实现统一，并在旁边打开文档，但我仍然在这里。

Answer 1

我不知道你为什么要使用协程而不是简单的方法..

说实话我不知道具体Valve.VR.InteractionSystem

但我只会做一些简单的方法，比如：

public GameObject obj1;

private void Update()
{
    if(Input.GetButton("Button1") // or however you access your button 1
    {
        obj1.SetActive(true);
    } else if (Input.GetButton("Button2") // or however you access your button2
    {
        obj1.SetActive(false);
    }
}

我在那里使用 else ，所以同时只执行一个按钮。

---

在快速搜索中，我现在还找到了Unity manual for SteamVr controler input。

他们有一个使用事件处理程序/回调的完整示例。这是一个简短的，应该满足您的需要（他们也很好地解释了它是如何工作的）

using UnityEngine; 

public class ObjectEnabler : MonoBehaviour
{   
    private SteamVR_TrackedController _controller;  

    public GameObject obj1;

    private void OnEnable() 
    {       
        // Get the controller this component is attached to
        _controller = GetComponent<SteamVR_TrackedController>();    

        // Register callbacks to your buttons
        // I've left this on the ones from the example .. if you need others 
        // You have to look them up
        // In the example there is also a complete list of all button events
        RegisterCallbacks();
    }   

    private void OnDisable()    
    {       
        UnregisterCallbacks();
    }

    // Register callbacks for controler events
    private void RegisterCallbacks()
    {
        // It is always save to remove callbacks 
        // So just to be sure we only register once so methods are not executed twice
        // I personaly always first unregister callbacks:
        UnregisterCallbacks();

        // now I register the callback that means e.g.
        // Everytime the event TriggerClicked is 
        // invoked anywhere in the Scene I want to execute HandleTrickerClicked
        // hint the method can be called as you like .. could also simply be EnableObject e.g.
        _controller.TriggerClicked += HandleTriggerClicked;     
        _controller.PadClicked += HandlePadClicked; 
        // For more information how the callbacks work
        // see the link I provided
    }

    // Unregister callbacks for events
    private void UnregisterCallbacks()
    {
        _controller.TriggerClicked -= HandleTriggerClicked;     
        _controller.PadClicked -= HandlePadClicked; 
    }

    // Called on TriggerClicked
    // Enables the obj1
    private void HandleTriggerClicked() 
    {
        obj1.SetActive(true);
    }   

    // Called on PadClicked
    // Disables the obj1
    private void HandlePadClicked()
    {
        obj1.SetActive(false);
    } 
}

您现在只需将此脚本附加到控制器（在 SteamVR_TrackedController 组件旁边），它应该会执行您想要的操作。

（我现在不确定，因为我从未使用过它，而且我在移动设备上，但他们的脚本最终可能会错过一些 using 命名空间，例如从整个 using Valve.VR; 内容开始，但我不知道如何就是这样实现的）