Unity射线

　//射线原点

　[SerializField] Transform tr;

//射线长度
    [SerializField] float dis = 5;

//射线停留时间

[SerializField] float t=0.1f
    // Use this for initialization
    void Start () {
        
    }
    
    // Update is called once per frame
    void Update () {
        //显示射线
        Ray ray = new Ray(tr.position,tr.forward) ;
        RaycastHit hit;
        Debug.DrawRay(tr.position, tr.forward * dis, Color.black, t);
        if (Physics.Raycast(ray,out hit,100)) {

//检测特定名称对象
            if (hit.collider.name== "Cube (1)") {
                print("被射到了");
            }
            
        }
    }