yichael_smartbow/Assets/BowArrow/Scripts/Game/CrossHair.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
/* 准心对象 */
public class CrossHair : MonoBehaviour
{
    public static CrossHair ins;
    private Image image = null;
    private bool open = false; 
    private bool visiable = false;

    void Awake()
    {
        ins = this;
    }

    void Start()
    {
        this.image = this.GetComponent<Image>();
        this.open = UserSettings.ins.openCrossHair;
        this.visiable = this.image.enabled;
        this.SetVisiable(false);
    }

    void Update()
    {
        if (open) SetVisiable(ArmBow.ins && ArmBow.ins.IsCanShoot());
    }

    void SetVisiable(bool value)
    {
        if (this.visiable == value) return;
        this.visiable = value;
        this.GetComponent<Image>().enabled = this.visiable;
    }

    public RaycastHit GetRaycastHit() {
        float maxDistance = 100;
        int layerMask = 1 << 8;
        RaycastHit hit;
        Ray ray = Camera.main.ScreenPointToRay(this.transform.position, Camera.MonoOrStereoscopicEye.Mono);
        bool raycastResult = Physics.Raycast(ray.origin, ray.direction, out hit, maxDistance, layerMask);
        // if (raycastResult) return hit.point;
        return hit;
    }    
}