Unity-layermask的问题

using UnityEngine;
using System.Collections;

public class NewBehaviourScript : MonoBehaviour {
    private RaycastHit info;
    LayerMask M1 = 1<<8;
    LayerMask M2 = 9<<10;
    // Use this for initialization
    void Start () {
        if (Physics.Raycast(this.transform.position, new Vector3(0, 0, 1), out info,M1))
        {
            
            print(info.collider.gameObject.name); }
    }
    
    // Update is called once per frame
    void Update () {
        Debug.DrawLine(transform.position, info.point, Color.red);
    }

之前就是这样写，但是发现不是m1的碰撞体还是被检测到了，今天 终于发现问题了

不知道是不是bug，就是 如果你不加distance的话 后面的mask unity是无视的

改成这样

(Physics.Raycast(this.transform.position, new Vector3(0, 0, 1), out info, Mathf.Infinity, M1))

就正常了。