void OnGUI()
    {
        GUILayout.Label("Base Settings", EditorStyles.boldLabel);


        GUILayout.BeginHorizontal();
        mMateiralDir = EditorGUILayout.TextField("材质目录", mMateiralDir);
        if (GUILayout.Button("选择"))
        {
            string path = EditorUtility.OpenFolderPanel("材质所在目录", mMateiralDir, "");
            if (path.Length > 0)
            {
                int len = System.Environment.CurrentDirectory.Length;


                mMateiralDir = path.Substring(len + 1);
            }
        }
        GUILayout.EndHorizontal();
        saveAsMatDir = GUILayout.Toggle(saveAsMatDir, "资源查找目录与材质目录一致");
        if (!saveAsMatDir)
        {
            GUILayout.BeginHorizontal();
            mResource = EditorGUILayout.TextField("资源目录", mResource);
            if (GUILayout.Button("选择"))
            {
                string path = EditorUtility.OpenFolderPanel("资源所在目录", mResource, "");
                if (path.Length > 0)
                {
                    int len = System.Environment.CurrentDirectory.Length;
                    mResource = path.Substring(len + 1);
                }
            }
            GUILayout.EndHorizontal();
        }



        if (GUILayout.Button("恢复"))
        {
            if (saveAsMatDir)
            {
                mResource = mMateiralDir;
            }
            int           len      = System.Environment.CurrentDirectory.Length + 1;
            List <string> mats     = DirHelper.GetAllFiles(mMateiralDir, "*.mat");
            int           matCount = mats.Count;
            if (matCount > 0)
            {
                List <string> mates = DirHelper.GetAllFiles(mResource, "*.meta");
                Dictionary <string, string> guids = new Dictionary <string, string>();
                foreach (var l in mates)
                {
                    if (l.EndsWith(".png.meta") || l.EndsWith(".tga.meta"))
                    {
                        string guid = MetaHelper.GetGuid(l);
                        string path = l.Substring(len, l.Length - 5 - len);
                        guids[guid] = path;
                    }
                    //DirHelper.Contains(l, ".png.meta",System.StringComparison.OrdinalIgnoreCase);
                }
                for (int k = 0; k < matCount; k++)
                //foreach (var l in mats)
                {
                    string l = mats[k];
                    EditorUtility.DisplayProgressBar("恢复材质", l, ((float)k) / matCount);
                    string path0 = l.Substring(len, l.Length - len);

                    if (!System.IO.File.Exists(path0))
                    {
                        Debug.LogError("file not found " + path0);
                        continue;
                    }

                    Material mat0 = (Material)AssetDatabase.LoadAssetAtPath <Material>(path0);
                    Debug.LogError("mat0 = " + mat0);
                    Dictionary <string, string> dict = MaterialHelper.GetTextureInformations(l);


                    if (dict.Count == 0)
                    {
                        continue;
                        Debug.LogError("非文本材质" + path0 + "跳过");
                    }

                    foreach (string name in dict.Keys)
                    {
                        string guid = dict[name];
                        string path;
                        if (guids.TryGetValue(guid, out path))
                        {
                            Texture2D tex = AssetDatabase.LoadAssetAtPath <Texture2D> (path);
                            mat0.SetTexture(name, tex);
                            //mat1.SetTexture (name, tex);

                            /*Debug.LogError ("set property[" + name + "]=" + tex + " "+name.Length);
                             * for (int i = 0; i < name.Length; i++) {
                             *
                             *      Debug.LogWarning (name[i]);
                             * }*/
                        }
                        else
                        {
                            //Debug.LogError ("texture not found["+name+"]"+guid);
                        }
                    }

                    EditorUtility.SetDirty(mat0);
                    AssetDatabase.SaveAssets();


                    AssetDatabase.Refresh();
                }
            }

            EditorUtility.ClearProgressBar();
        }
    }