Unity-layermask的问题

 1 using UnityEngine;
 2 using System.Collections;
 3 
 4 public class NewBehaviourScript : MonoBehaviour {
 5     private RaycastHit info;
 6     LayerMask M1 = 1<<8;
 7     LayerMask M2 = 9<<10;
 8     // Use this for initialization
 9     void Start () {
10         if (Physics.Raycast(this.transform.position, new Vector3(0, 0, 1), out info,M1))
11         {
12             
13             print(info.collider.gameObject.name); }
14     }
15     
16     // Update is called once per frame
17     void Update () {
18         Debug.DrawLine(transform.position, info.point, Color.red);
19     }