unity pico开发 五 UI交互

添加画布

创建一个新画布，添加一个Button，将画布改为world space，然后缩放改为0.001，调整到合适的位置

添加交互组件

1 为画布添加Tracked Device Graphic Raycaster

2 找到eventSystem，删除自带的输入模块

然后添加XR UI Input Modeule

此时即可进行交互，triiger键是鼠标左键，注意画布本身不受interactionToolkit的layer影响，任何射线都可以控制他

取消传送射线对UI的控制

取消勾选这个

解决按扳机键会传送的冲突

由于我设置的传送按键是扳机键，在点击UI时会同时触发传送
解决思路是，当抓取射线在UI上时，禁用传送射线，用抓取射线进行UI交互
编写脚本

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.XR.Interaction.Toolkit;public class ActivateTeleportationRay : MonoBehaviour
{public GameObject leftTeletportation;public GameObject rightTeletportation;public InputActionProperty leftActivate;public InputActionProperty rightActivate;public InputActionProperty leftCancel;public InputActionProperty rightCancel;public XRRayInteractor leftRay;public XRRayInteractor rightRay;private void Update(){leftRay.TryGetHitInfo(out Vector3 leftPos,out Vector3 leftNormal,out int leftNumber,out bool leftValid);//抓取射线指向了交互物体（UI或可抓取物体），没有按下抓取键，已经扣动了扳机，才激活传送射线leftTeletportation.SetActive(!leftValid&&leftCancel.action.ReadValue<float>() == 0&&leftActivate.action.ReadValue<float>() > 0.1f);rightRay.TryGetHitInfo(out Vector3 rightPos, out Vector3 rightNormal, out int rightNumber, out bool rightValid);rightTeletportation.SetActive(!rightValid&&rightCancel.action.ReadValue<float>() == 0&&rightActivate.action.ReadValue<float>() > 0.1f);}
}

按下按键呼出菜单，并让菜单出现在头的前方

编写如下脚本

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.InputSystem;public class GameMenuManager : MonoBehaviour
{public GameObject menu;public InputActionProperty showButton;public Transform head;public float spawnDistance = 2;void Update(){if (showButton.action.WasPressedThisFrame()){menu.SetActive(!menu.activeSelf);menu.transform.position = head.position + new Vector3(head.forward.x,0,head.forward.z).normalized*spawnDistance;}menu.transform.LookAt(new Vector3(head.position.x, menu.transform.position.y, head.position.z));menu.transform.forward *= -1;}
}

新建一个物体“游戏菜单”，挂载脚本
将菜单的画布设置为游戏菜单的子物体

设置脚本的参数