private void buttonAddSeries_Click(object sender, EventArgs e)
        {
            if (VtkControl.ImageData == null || VtkControl.PolyData == null)
            {
                MessageBox.Show("Please Load Model First!");
                return;
            }

            if (vtk.IsDisposed)
            {
                vtk = new VtkForm();
            }
            vtk.Show();


            imageRect = new Rectangle()
            {
                X = (int)(((float)rectSelected.Left) / pictureBoxImage.Width * VtkControl.ImageWidth),
                Y =
                    VtkControl.ImageHeight -
                    (int)(((float)rectSelected.Bottom) / pictureBoxImage.Height * VtkControl.ImageHeight),
                Width  = (int)(((float)rectSelected.Width) / pictureBoxImage.Width * VtkControl.ImageWidth),
                Height = (int)(((float)rectSelected.Height) / pictureBoxImage.Height * VtkControl.ImageHeight),
            };


            if (imageRect.Width * imageRect.Height == 0)
            {
                imageRect = new Rectangle()
                {
                    X      = 0,
                    Y      = 0,
                    Width  = VtkControl.ImageWidth,
                    Height = VtkControl.ImageHeight
                };

                VtkControl.RectPolyData = vtkPolyData.New();
                VtkControl.RectPolyData.DeepCopy(VtkControl.PolyData);
                VtkControl.RectImageData = vtkImageData.New();
                VtkControl.RectImageData.DeepCopy(VtkControl.ImageData);

                VtkControl.SetRectModel(new Rectangle(0, 0, VtkControl.ImageWidth, VtkControl.ImageHeight));
            }
            else
            {
                VtkControl.GetRectData(VtkControl.PolyData, imageRect);

                VtkControl.SetRectModel(imageRect);
            }

            vtk.renWinControl3D.RenderWindow.Render();
        }