LineRenderer组建实现激光效果

1 using UnityEngine;
2 using System.Collections;
3
4 public class ttw : MonoBehaviour
5 {
6     LineRenderer reader;
7     RaycastHit hit;
8     Ray ray;
9     void Awake()
10     {
11         reader = GetComponent<LineRenderer>();
12     }
13
14     // Use this for initialization
15     void Start()
16     {
17         reader.SetVertexCount(2);//设置顶点
18         reader.SetWidth(0.1f, 0.1f); //设置开始和结束的宽
19         reader.SetColors(Color.red, Color.yellow); //设置开始和结束的颜色
20         reader.SetPosition(0, transform.position);//设置开始坐标
21     }
22
23     // Update is called once per frame
24     void Update()
25     {
26         ray = Camera.main.ScreenPointToRay(Input.mousePosition);
27         if (Physics.Raycast(ray, out hit)) //当射线碰到物体
28         {
29             reader.SetPosition(1, hit.point);
30         }
31         else
32         {
33             //以下效果相同，
34             //reader.SetPosition(1, ray.GetPoint(1000));
35             reader.SetPosition(1, ray.direction * 1000 - transform.position);
36         }
37     }
38 }