UnityUtil-Auto Sprites Batch Slicer

Intro.

* SpriteMetaData to TextureImporter.spritesheet is Obsolte.

* In the Unity Eiditor, 'Sprite Slice' is not simple. If they were many Sprites, should slice a lot of borders.

* So, I made up Texture Import Settings and Slice Settings on the Editor Window.

Setup.

1. Click the menu which is 'Window / AutoSpriteSlice', Please.

2. Drag and drop any texture of the folder to the object field or Input the path which contains textures on the path input field.

3. Input texture settings and slice settings.

3 - 1. If you want load textures of all paths, could click the button 'Load All Paths'.

3 - 2. If you want clear textures of all paths, could click the button 'Clear Loaded Textures'.

3 - 3. If you want slice textures of all paths, could click the button 'Slice Textures'.

3 - 4. If you want slice each texture of path, could set 'Setting Apply Type' to 'Only This Texture' and then click the button 'Apply Only This Texture'.

Snippet

private void Slice(){

                var factory = new SpriteDataProviderFactories();
                factory.Init();
                var dataProvider = factory.GetSpriteEditorDataProviderFromObject(obj);
                dataProvider.InitSpriteEditorDataProvider();
                var textureImporter = (dataProvider.targetObject as TextureImporter);

                textureImporter.textureType = TextureImporterType.Sprite;
                textureImporter.spritePixelsPerUnit = 100;
                textureImporter.spriteImportMode = SpriteImportMode.Single;
                textureImporter.SaveAndReimport();
                
                var textureProvider = dataProvider.GetDataProvider<ITextureDataProvider>();
                if (textureProvider != null)
                {
                    int width = 0, height = 0;
                    textureProvider.GetTextureActualWidthAndHeight(out width, out height);
                    //var rect = InternalSpriteUtility.GenerateGridSpriteRectangles(obj as Texture2D, Vector2.zero, new Vector2(64,64), Vector2.zero, true); 
                    var rect = InternalSpriteUtility.GenerateAutomaticSpriteRectangles(obj as Texture2D, width,0);
                    List<SpriteRect> rects = new List<SpriteRect>();
                    for (int i = 0; i < rect.Length; i++)
                    {
                        SpriteRect r = new SpriteRect();

                        r.rect = rect[i];
                        r.alignment = SpriteAlignment.Center;
                        // left , bottom, right, top
                        r.border = new Vector4(width / 3, height / 3, width / 3,height / 3);
                        r.name = $"{obj.name}_{i}";
                        r.pivot = new Vector2(0.5f, 0.5f);
                        r.spriteID = GUID.Generate();
                        rects.Add(r);
                    }
                    dataProvider.SetSpriteRects(rects.ToArray());
                    dataProvider.Apply();
                }

                textureImporter.SaveAndReimport();
}

explain by gif.