u3d 2d序列动画代码

using UnityEngine;
using System.Collections;

public class AniSprite : MonoBehaviour {

    private float myTime = 0;
    private bool isPlay = true;
    //anisprit.Sprite(4, 6, 0, 0, 20, 24, 1f);的意思是：改图是一个4列6行的动画图，图以坐标（0,0）开始，总帧数给定20帧，帧速率24，总用时1秒
    public bool Sprite(int columnSize,int rowSize, float colFrameStart, float rowFrameStart, int totalFrames, int framesPerSecond, float totalTime)
    {
        myTime += Time.deltaTime;
        if (totalTime != 0 && myTime > totalTime)
        {
            isPlay = false;
            myTime = 0;
            return isPlay;
        }
        int index = (int)(Time.time * framesPerSecond)% totalFrames;

        Vector2 size = new Vector2(1.0f/columnSize,1.0f/rowSize);

        int u = index % columnSize;
        int v = index / columnSize;

        Vector2 offset = new Vector2((u + colFrameStart) * size.x, (1.0f - size.y) - (v + rowFrameStart) * size.y);
        renderer.material.mainTextureScale = size;
        renderer.material.mainTextureOffset = offset;
        return true;
    }
}