using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class Anim_SequenceFrame : MonoBehaviour
{
    public Material material;
    public int rowNum,//ÐÐ
        columnNum;//ÁÐ
    public float fps = 2;

    float timer = 0;
    int currentIndex = 0;

    float xSize, ySize;

    int texId = Shader.PropertyToID("_MainTex");

    private void Awake()
    {
        var r = GetComponent<Renderer>();
        if (r)
        {
            material = r.material;
        }
        else
        {
            var g = GetComponent<Graphic>();
            if (g)
                material = g.material;

        }


        ySize = 1f / rowNum;
        xSize = 1f / columnNum;

        material.SetTextureScale(texId, new Vector2(xSize, ySize));

    }

    // Start is called before the first frame update
    void Start()
    {
    }

    // Update is called once per frame
    void Update()
    {
        float time = 1 / fps;
        timer += Time.deltaTime;
        if(timer >= time)
        {
            currentIndex += 1;
            currentIndex %= rowNum * columnNum;
            timer -= time;
        }

        int row = currentIndex % columnNum;
        int column = currentIndex % rowNum;

        material.SetTextureOffset(texId, new Vector2((column - 1) * xSize, (row - 1) * ySize));
    }
}