分割图集成一张张小图

出处：http://tieba.baidu.com/p/3217039693

using UnityEngine;

using UnityEditor;
using System.Collections.Generic;
using System.IO;


public static class SpriteSheetPackerImport
{
[MenuItem("Assets/Sprite Sheet Packer/Process to Sprites")]
static void ProcessToSprite()
{
Texture2D image = Selection.activeObject as Texture2D;//获取旋转的对象
string rootPath = Path.GetDirectoryName(AssetDatabase.GetAssetPath(image));//获取路径名称
string path = rootPath + "/" + image.name + ".PNG";//图片路径名称


TextureImporter texImp = AssetImporter.GetAtPath(path) as TextureImporter;


AssetDatabase.CreateFolder(rootPath, image.name);//创建文件夹


foreach (SpriteMetaData metaData in texImp.spritesheet)//遍历小图集
{
Texture2D myimage = new Texture2D((int)metaData.rect.width, (int)metaData.rect.height);


//abc_0:(x:2.00, y:400.00, width:103.00, height:112.00)
for (int y = (int)metaData.rect.y; y < metaData.rect.y + metaData.rect.height; y++)//Y轴像素
{
for (int x = (int)metaData.rect.x; x < metaData.rect.x + metaData.rect.width; x++)
myimage.SetPixel(x - (int)metaData.rect.x, y - (int)metaData.rect.y, image.GetPixel(x, y));
}


//转换纹理到EncodeToPNG兼容格式
if(myimage.format != TextureFormat.ARGB32 && myimage.format != TextureFormat.RGB24){
Texture2D newTexture = new Texture2D(myimage.width, myimage.height);
newTexture.SetPixels(myimage.GetPixels(0),0);
myimage = newTexture;
}
var pngData = myimage.EncodeToPNG();


//AssetDatabase.CreateAsset(myimage, rootPath + "/" + image.name + "/" + metaData.name + ".PNG");
File.WriteAllBytes(rootPath + "/" + image.name + "/" + metaData.name + ".PNG", pngData);
}
}
}