通过手柄发射射线与UI按钮进行交互
在Button上需要添加的两个脚本和组件
手柄需要准备的内容
在手柄控制器上添加脚本SteamVR_LaserPointer，使得手柄可以发射射线，在创建脚本LaserInteraction实现UI交互功能
//为射线移入移出或点击Button时的三个事件添加监听事件，即UGUI中Button的移入、移出、点击事件using System;using System.Collections;using System.Collections.Generic;using UnityEngine;using UnityEngine.EventSystems;using Valve.VR.Extras;public class LaserInteraction : MonoBehaviour{// LaserPointer组件private SteamVR_LaserPointer _laser;// 当前交互的UI元素private GameObject _uGUIElement;// 是否开启激光指针交互public bool isEnabled = true;private void Awake(){// 获取到LaserPointer组件_laser = GetComponent<SteamVR_LaserPointer>();// 如果不为空if (_laser != null){// 如果不开启激光指针交互if (!isEnabled){// 激光指针不显示_laser.enabled = false;return;}else // 如果开启激光指针交互{_laser.PointerIn += LaserOnPointerIn;_laser.PointerOut += LaserOnPointerOut;_laser.PointerClick += LaserOnPointerClick;}}}private void LaserOnPointerIn(object sender, PointerEventArgs e){IPointerEnterHandler _pointerEnterHandler = e.target.gameObject.GetComponent<IPointerEnterHandler>();if (_pointerEnterHandler != null){_pointerEnterHandler.OnPointerEnter(new PointerEventData(EventSystem.current));}}private void LaserOnPointerOut(object sender, PointerEventArgs e){IPointerExitHandler _pointerExitHandler = e.target.gameObject.GetComponent<IPointerExitHandler>();if (_pointerExitHandler != null){_pointerExitHandler.OnPointerExit(new PointerEventData(EventSystem.current));}}private void LaserOnPointerClick(object sender, PointerEventArgs e){IPointerClickHandler _pointerClickHandler = e.target.gameObject.GetComponent<IPointerClickHandler>();if (_pointerClickHandler != null){_pointerClickHandler.OnPointerClick(new PointerEventData(EventSystem.current));}}}
另一种更简单的方式
首先手柄只需要挂上射线脚本Steam VR_Laser Pointer
然后对于UI元素，我们只需要在其上挂上碰撞器BoxCollider即可
最后也是最核心的就是我们需要为手柄射线移入移出点击 添加事件（上诉一样添加的是UGUI的按钮点击事件，这里是我们自身需要的逻辑函数）
using System;using System.Collections;using System.Collections.Generic;using UnityEngine;using UnityEngine.UI;using Valve.VR.Extras;public class UIManager : MonoBehaviour{//将挂载了Steam VR_Laser Pointer的物体赋值给Hand，若两只手都需要请多定义一个并赋值和添加监听[SerializeField] public GameObject Hand; private void Start(){//为Hand的射线移入移出点击 绑定需要的函数Hand.GetComponent<SteamVR_LaserPointer>().PointerIn += SceneOneUI_PointerIn;Hand.GetComponent<SteamVR_LaserPointer>().PointerOut += SceneOneUI_PointerOut;Hand.GetComponent<SteamVR_LaserPointer>().PointerClick += SceneOneUI_PointerClick;}private void SceneOneUI_PointerClick(object sender, PointerEventArgs e){if (e.target.name == "Btn1"){Debug.log("挂载了碰撞体并且命为 Btn1 的物体被点击了");}//....扩展，若有其他UI元素需要交互，请为它添加BoxCollider组件，并命名//例如下/* if (e.target.name == "Btn2"){Debug.log("挂载了碰撞体并且命为 Btn1 的物体被点击了");}*/}private void SceneOneUI_PointerOut(object sender, PointerEventArgs e){if (e.target.name == "Btn1"){Debug.log("射线移出 挂载了碰撞体并且命为 Btn1 的物体");}}private void SceneOneUI_PointerIn(object sender, PointerEventArgs e){if (e.target.name == "Btn1"){Debug.log("射线移入 挂载了碰撞体并且命为 Btn1 的物体");}}IEnumerator Btn1OnClick(){//点击后的游戏逻辑}}
如果我们还有其他UI 也可以在UIManager中扩展，只需要区别碰撞体不同的名字即可，当UI元素比较少时可以这么做，简单方便。
