移动方式

//Vector3 pos;
    public float speed = 0.25f;
    // Use this for initialization
    void Start () {
       // pos = transform.position;
    }
    
    // Update is called once per frame
    void Update () {

        float move = Time.time * speed;
        GetComponent<MeshRenderer>().material.mainTextureOffset = new Vector2(0,move);//材质移动
        //print(Time.time);
        //float t=  Mathf.Repeat(Time.time*speed,30);
        //transform.position = pos + t * Vector3.back;
    }