Unity background easing effect

   This is a very common small function. For example, when we are playing a horizontal version of the game, the background animation will move at a certain frequency, and there are many ways to realize it.

  For example, use UGUI's image+animtion animation method to realize k-frame by yourself.

  It can also be realized by using the function of the shader itself. The key functions are as follows:

 public Material material;
    public float _offset;
    private int paraId;

    void Start()
    {
        material = GetComponent<Image>().material;

        paraId = Shader.PropertyToID("factor");
    }

    // Update is called once per frame
    void Update()
    {
        material.SetTextureOffset("_MainTex", new Vector2(_offset, 0));
    }

 The matching material ball is as follows: