public static Texture2D GenerateThumb(AutoTileset autoTileset, SlotAon slotAON)
        {
            int       x = Mathf.RoundToInt(slotAON.AtlasRecThumb.x);
            int       y = Mathf.RoundToInt(slotAON.AtlasRecThumb.y);
            int       w = Mathf.RoundToInt(slotAON.AtlasRecThumb.width);
            int       h = Mathf.RoundToInt(slotAON.AtlasRecThumb.height);
            Texture2D tilesetTexture = new Texture2D(w, h, TextureFormat.ARGB32, false);

            tilesetTexture.filterMode = FilterMode.Point;
            // Color[] autotileColors = autoTileset.PixelsThumb( slotAON).GetPixels(x, y, w, h);
            Color[] autotileColors = autoTileset.PixelsThumb(slotAON);
            tilesetTexture.SetPixels(autotileColors);
            tilesetTexture.Apply();
            return(tilesetTexture);
        }
        private static void _FillSpritesFromRect(List <Rect> _outList, AutoTileset autoTileset, int x, int y, int width, int height)
        {
            Rect srcRect = new Rect(0, 0, autoTileset.TileWidth, autoTileset.TileHeight);

            for (srcRect.y = height - autoTileset.TileHeight; srcRect.y >= 0; srcRect.y -= autoTileset.TileHeight)
            {
                for (srcRect.x = 0; srcRect.x < width; srcRect.x += autoTileset.TileWidth)
                {
                    Rect sprRect = srcRect;
                    sprRect.x += x;
                    sprRect.y += y;
                    _outList.Add(sprRect);
                }
            }
        }