unity3D中 material中tiling和offset屬性解釋

貼圖有可能是多行多列的一些圖案組成的。當我們需要一幀，一幀的播放時候。也就是幀序列動畫，

我們就需要用到tiling和offset兩個屬性，

默認圖片的左下角為坐標圓點即：（0,0）

tiling是圖片的大小，offset是偏移量

來看看一些例子：

 

using UnityEngine;
using System.Collections;

public class animspite : MonoBehaviour
{


    public int totolFrame;//總幀數，即多少幀
    public int fbs;//幀速度 即 1秒運行多少幀
    public int rowNumber; //幾行
    public int colNumber; //幾列
    public bool isDes = false; //是否播放一次就銷毀對象
    // Use this for initialization
    void Start()
    {
        //判斷當前平台
        #if UNITY_EDITOR
                Debug.Log("Unity Editor");
        #endif

        #if UNITY_IPHONE
                Debug.Log("Iphone");
        #endif

        #if UNITY_STANDALONE_OSX
                Debug.Log("Stand Alone OSX");
        #endif

        #if UNITY_STANDALONE_WIN
                Debug.Log("Stand Alone Windows");
        #endif
    }

    // Update is called once per frame
    void Update()
    {
        int index = (int)(Time.time * fbs);

        index = index % totolFrame;

        float sizeX = 1.0f / colNumber;
        float sizeY = 1.0f / rowNumber;
        Vector2 size = new Vector2(sizeX, sizeY);

        float uIndex = index % colNumber;
        float vIndex = index / colNumber;
　　　　　　 //int vIndex = index % rowNumber;

        float offsetX = uIndex * size.x;
        float offsetY = (1.0f - size.y) - (vIndex * size.y);
        //offsetY = 1.0f * vIndex / rowNumber;

        Vector2 offset = new Vector2(offsetX, offsetY);

        transform.renderer.material.mainTextureScale = size;
        transform.renderer.material.mainTextureOffset = offset;


        if (isDes)
        {
            if (Time.time > 1)
            {
                Destroy(this.gameObject);
            }
        }
    }
}

 

 //--------------更直觀的分割線----------------------
        int currentFame = (int)(Time.time * fbs); //算出當前幀
　　　　　　if (assing != 0) currentFame = assing;//當指定assing值時，即只播放指定幀的動畫

        Vector2 size = new Vector2(); //算出當前幀，圖片的坐標
        size.x = 1.0f / colNumber;
        size.y = 1.0f / rowNumber;

        //算出當前幀，圖片分別在x。y軸上的坐標
        float xFrame = currentFame % colNumber;
        float yFrmae = currentFame / colNumber;

        Vector2 offset = new Vector2(); //算出當前幀，圖片的偏移量
        offset.x = xFrame * size.x;
        offset.y = 1.0f - size.y - (yFrmae * size.y);

        //賦值
        transform.renderer.material.mainTextureScale = size;
        transform.renderer.material.mainTextureOffset = offset;

 

/*參考自網絡*/
    public int rowCount = 4; //圖片的中幀圖片的行數
    public int colCount = 4; //圖片的中幀圖片的列數
    public int rowStart = 0; //開始播放的行下標
    public int colStart = 0; //開始播放的列下標
    public int totalCells = 4; //幀圖片的總數
    public int fps = 10;  //播放速度
    //Update
    void Update()
    {
        SetSpriteAnimation(colCount, rowCount, rowStart, colStart, totalCells, fps);
    }

    //SetSpriteAnimation
    void SetSpriteAnimation(int colCount, int rowCount, int rowStart, int colStart, int totalCells, int fps)
    {
        //因為Time.time的為游戲運行的時間，所以index=1,2,3,4...
        int index = (int)(Time.time * fps);
        index = index % totalCells;
        float sizeX = 1.0f / colCount;
        float sizeY = 1.0f / rowCount;
        Vector2 size = new Vector2(sizeX, sizeY);
        var uIndex = index % colCount;
        var vIndex = index / colCount;
        float offsetX = (uIndex + colStart) * size.x;
        //V軸位於圖片的下方，因此V要翻轉下
        float offsetY = (1.0f - size.y) - (vIndex + rowStart) * size.y; 
        Vector2 offset = new Vector2(offsetX, offsetY);
        renderer.material.SetTextureOffset("_MainTex", offset);
        renderer.material.SetTextureScale("_MainTex", size);
    }