// 划分像素值，并将八方向的像素放入队列准备划分
private static void SetGather(int x, int y, int id)
{
Color color = _image.GetPixel(x, y);
TextureGather textureGather = GetGather(id);
textureGather.AddPixel(new Position(x, y), color);
PushToQueue(x + 1, y);
PushToQueue(x - 1, y);
PushToQueue(x, y + 1);
PushToQueue(x, y - 1);
PushToQueue(x + 1, y + 1);
PushToQueue(x - 1, y - 1);
PushToQueue(x + 1, y - 1);
PushToQueue(x - 1, y + 1);
}
