GunSystem/Assets/Script/Menu/Menu.cs

 using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.UI;

//首先判断手和头部之间的距离,距离到一定距离时,在头部发出一条射线,射线碰到的菜单的按钮变成hover状态


public class Menu : MonoBehaviour {
    public GameObject leftHand;
    public GameObject head;
    public GameObject mouseIcon;
    public Image mouseIcon_Image;
    public Collider menuCollider;
    public float y;
    public UnityEvent shakeEvent;
    private Button menuButton;
    private RaycastHit menuMouse;
    //每隔0.3秒进行一次震动长度检测，超过一定的数值便触发该事件
    private Vector3 shakePoint;
    private float shakeDistance;
    private int shakeTimer;

    // Use this for initialization
    void Start () {
        shakeTimer = 30;
        shakeDistance = 0f;
	}
	
	// Update is called once per frame
	void Update () {
        lookMenu();
	}

    void lookMenu() {
        Vector3 startRayPoint = head.transform.position - new Vector3(0f, y, 0f);
        if (Physics.Raycast(startRayPoint, head.transform.forward,out menuMouse, 1)) {
            //print(menuMouse.collider);
            Debug.DrawRay(startRayPoint, head.transform.forward * 1f, Color.red);
            if (menuMouse.collider == menuCollider)
            {
                mouseIcon_Image.transform.position = menuMouse.point;
                //print("target on");
            }else
            {
                //print("target lost");
            }
        }
        //甩手方法
        if (shakeTimer > 0)
        {
            shakeTimer -= 1;
            shakeDistance = shakeDistance + Mathf.Abs(shakePoint.x - leftHand.transform.position.x) + Mathf.Abs(shakePoint.y - leftHand.transform.position.y) + Mathf.Abs(shakePoint.y - leftHand.transform.position.y);
            shakePoint = leftHand.transform.position;
        }
        else {
            shakeTimer = 30;
            shakeDistance = 0f;
        }
        if (shakeDistance > 1.5f) {
            shakeEvent.Invoke();
            shakeDistance = 0f;
        }
    }

    void clickMenu() {

    }

    void onPressMenu() {

    }

    void onReleaseMenu() {

    }

    public void shakeMenu() {
        print("shakeEvent!!!");
    }
}