unity3D中 material中tiling和offset属性解释

贴图有可能是多行多列的一些图案组成的。当我们需要一帧，一帧的播放时候。也就是帧序列动画，

我们就需要用到tiling和offset两个属性，

默认图片的左下角为坐标圆点即：（0,0）

tiling是图片的大小，offset是偏移量

来看看一些例子：

 using UnityEngine;

 using System.Collections;

 public class animspite : MonoBehaviour

 {

     public int totolFrame;//总帧数，即多少帧

     public int fbs;//帧速度 即 1秒运行多少帧

     public int rowNumber; //几行

     public int colNumber; //几列

     public bool isDes = false; //是否播放一次就销毁对象

     // Use this for initialization

     void Start()

     {

         //判断当前平台

         #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 > )

             {

                 Destroy(this.gameObject);

             }

         }

     }

 }

  //--------------更直观的分割线----------------------

         int currentFame = (int)(Time.time * fbs); //算出当前帧
　　　　　　if (assing != 0) currentFame = assing;//当指定assing值时，即只播放指定帧的动画

         Vector2 size = new Vector2(); //算出当前帧，图片的坐标

         size.x = 1.0f / colNumber;

         size.y = 1.0f / rowNumber;

         //算出当前帧，图片分别在x。y轴上的坐标

         float xFrame = currentFame % colNumber;

         float yFrmae = currentFame / colNumber;

         Vector2 offset = new Vector2(); //算出当前帧，图片的偏移量

         offset.x = xFrame * size.x;

         offset.y = 1.0f - size.y - (yFrmae * size.y);

         //赋值

         transform.renderer.material.mainTextureScale = size;

         transform.renderer.material.mainTextureOffset = offset;

 /*参考自网络*/

     public int rowCount = ; //图片的中帧图片的行数

     public int colCount = ; //图片的中帧图片的列数

     public int rowStart = ; //开始播放的行下标

     public int colStart = ; //开始播放的列下标

     public int totalCells = ; //帧图片的总数

     public int fps = ;  //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)

     {

         //因为Time.time的为游戏运行的时间，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轴位于图片的下方，因此V要翻转下

         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);

     }