Unity3D-射线效果

基于airplane_02 下面新建 Line Renderer

将上面的几个地方设置下

添加Script脚本：

脚本代码为：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class AirPlane : MonoBehaviour
{
    public LineRenderer lineRender;

    public Transform gunPoint;
    // Start is called before the first frame update
    void Start()
    {
        lineRender = GetComponent<LineRenderer>();
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetMouseButton(0))
        {
            lineRender.enabled = true;
            lineRender.SetPosition(0, gunPoint.position);
            Ray ray = Camera.main.ScreenPointToPay(Input.mousePosition);
            RaycastHit hit;
            if (Physics.Raycast(ray, out hit))
            {
                lineRender.SetPosition(1, hit.point);
            }
        }
        else
        {
            lineRender.enabled = false;
        }

    }
}

在airplane_02下 Create Empty ，gunPoint

运行可看到效果：