Unity学习-优化_图集归类以及Unity和texturepackter的动态批处理

 Selection.GetFiltered(typeof(Object), SelectionMode.Assets)

using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;
using System.IO;
using System.Threading;
using System.Diagnostics;

public class BuildAtlas : MonoBehaviour
{
    static string path;
    static object wwwLoad;
    [MenuItem("打包图集/打包")]
    static void CreatTexturePacker()
    {
        
        Object[] arrayList = Selection.GetFiltered(typeof(Object), SelectionMode.Assets);//获取用户选择的物体
        for (int i = 0; i < arrayList.Length; i++)
        {

            //用户如果选择多个文件夹路径则进行多次处理
            path = AssetDatabase.GetAssetPath(arrayList[i]);
            CallTexturePacker("test", path);
            if (path != "")
            {
                float offest = GetTextureHeight(path + "/json.png");
                TextureImporter textureImporter = AssetImporter.GetAtPath(path + "/json.png") as TextureImporter;
                textureImporter.textureType = TextureImporterType.Sprite;
                textureImporter.spriteImportMode = SpriteImportMode.Multiple;
                textureImporter.GetDefaultPlatformTextureSettings();
                WirteSpriteJsonToSheet(textureImporter, path + "/json.txt", offest);
                textureImporter.SaveAndReimport();
            }
        }
    }


    /// <summary>
    /// 获取目标texture的高度做偏移
    /// </summary>
    /// <param name="path"></param>
    /// <returns></returns>
    static float GetTextureHeight(string path)
    {

        UnityEngine.Debug.Log(path);
        Texture2D texture2D = AssetDatabase.LoadAssetAtPath<Texture2D>(path);
        return texture2D.width;
    }

    /// <summary>
    /// 读取json文件
    /// </summary>
    /// <param name="path"></param>
    /// <returns></returns>
    static string GetJson(string path)
    {
        FileStream stream = new FileStream(path, FileMode.Open);

        StreamReader sr = new StreamReader(stream);

        string str = sr.ReadToEnd();
        sr.Dispose();
        sr.Close();
        return str;


    }

    /// <summary>
    /// 将TextureImprot按文本位置切分
    /// </summary>
    /// <param name="TIP"></param>
    /// <param name="txtPath"></param>
    /// <param name="offset"></param>
    static void WirteSpriteJsonToSheet(TextureImporter TIP, string txtPath, float offset)
    {
        string spriteInfoArry = GetJson(txtPath);
        Hashtable hashInfo = spriteInfoArry.hashtableFromJson();//转换成哈希表（很奇怪，转成arryList会返回空，可能是不太会用吧）
     
        Hashtable frames = (Hashtable)hashInfo["frames"];
        List<SpriteMetaData> Sprites = new List<SpriteMetaData>();
        foreach (DictionaryEntry item in frames)
        {
            SpriteMetaData sprite = new SpriteMetaData();
            Hashtable mTable = (Hashtable)item.Value; //每一步都要转成hashtable才能进行取值操作，得到的结果也要转成hashtable
            Hashtable frame = (Hashtable)mTable["frame"];//取到位置信息
            sprite.name = item.Key.ToString();

            //这里要注意，json提供的坐标文件 坐标系是左上角为原点 UNITY的gui坐标系是左下角为原点，所以我们要做坐标转换，左上和左下，只需要做Y轴的转换即可
            //转换的偏移量要和实际的texture对应，所以我们需要获取实际的Texture大小
            sprite.rect = new Rect((float)frame["x"], offset - (float)frame["y"] - (float)frame["h"], (float)frame["w"], (float)frame["h"]);//位置信息赋值
            Hashtable spriteSourceSize = (Hashtable)mTable["spriteSourceSize"];
            Hashtable pviot = (Hashtable)mTable["sourceSize"];
            sprite.border = new Vector4((float)spriteSourceSize["x"], (float)spriteSourceSize["y"], (float)spriteSourceSize["w"], (float)spriteSourceSize["h"]); //边框大小
            sprite.alignment = 6;//Center = 0, TopLeft = 1, TopCenter = 2, TopRight = 3, LeftCenter = 4, RightCenter = 5, BottomLeft = 6, BottomCenter = 7, BottomRight = 8, Custom = 9.
            sprite.pivot = new Vector2((float)pviot["w"], (float)pviot["h"]);
            Sprites.Add(sprite);
        }
        TIP.spritesheet = Sprites.ToArray();
        TIP.SaveAndReimport();
        UnityEngine.Debug.Log("转换成功");
    }



    static void CallTexturePacker(string selecteFileName,string path)
    {
        
        Process process = new Process();
        ProcessStartInfo info = new ProcessStartInfo("texturepacker");     
        string arguments = "Assets/Test/";
        arguments += " --sheet " + path + "/"+selecteFileName+".png";
        arguments += " --data "  + path+ "/"+selecteFileName+".txt";        
        arguments += " --format unity";
        arguments += " --pack-mode Best";
        arguments += " --algorithm MaxRects";
        arguments += " --max-size 1024";
        arguments += " --trim-mode None";
        arguments += " --disable-rotation";
        arguments += " --size-constraints  POT";
        info.Arguments = arguments;
        info.CreateNoWindow = false;
        UnityEngine.Debug.Log(info.Arguments);
        Process.Start(info);
    }
}