VTK 实现MarchingCube Activiz

   public partial class Form1 : Form
    {

        #region 私有成员
        private string _fileName = null;
        private vtkRenderer render = null;
        private vtkRenderWindow renwin = null;
        private vtkRenderWindowInteractor iren = null;
        private vtkDICOMImageReader reader = null;
        private vtkContourFilter skinExtractor = null;
      
        #endregion

        #region
        public string FileName
        {
            get { return _fileName; }
            set { _fileName=value;}
        }
        #endregion


        public Form1()
        {
            InitializeComponent();
        }

        private void renderWindowControl1_Load(object sender, EventArgs e)
        {
             render = renderWindowControl1.RenderWindow.GetRenderers().GetFirstRenderer();
             renwin = renderWindowControl1.RenderWindow;
             iren = renderWindowControl1.RenderWindow.GetInteractor();
        
            
        }

        private void button1_Click(object sender, EventArgs e)
        {
            btn_render.Enabled = false;
            _fileName = null;
            FolderBrowserDialog dlg = new FolderBrowserDialog();
            if (dlg.ShowDialog() == DialogResult.OK)
            {
                _fileName= dlg.SelectedPath;
            }
            dlg.Dispose();
            btn_render.Enabled = true;
        }

        private void btn_render_Click(object sender, EventArgs e)
        {       


            if(String.IsNullOrEmpty(_fileName))
            {
                MessageBox.Show("请先指定文件夹路径！");
                return;
            }
            //还需要修改，可以将这一部分抽取出来做一个单独的方法。
            if (reader != null)
            {
                reader.Dispose();
                skinExtractor.Dispose();//需要修正
                render.RemoveAllViewProps();
                render.ResetCamera();

            }
            
            reader = new vtkDICOMImageReader();
            reader.SetDataByteOrderToLittleEndian();
            //reader.SetDirectoryName(@"E:\decompress");
            reader.SetDirectoryName(_fileName);
            reader.Update();


            skinExtractor = vtkContourFilter.New();
            skinExtractor.SetInputConnection(reader.GetOutputPort());
            skinExtractor.SetValue(0, 200);//200
            //skinExtractor.Modified();
            //skinExtractor.SetValue(1, 500);

            vtkPolyDataNormals skinNormals = vtkPolyDataNormals.New();
            skinNormals.SetInputConnection(skinExtractor.GetOutputPort());
            skinNormals.SetFeatureAngle(60.0);//?

            vtkPolyDataMapper skinmapper = vtkPolyDataMapper.New();
            skinmapper.SetInputConnection(skinNormals.GetOutputPort());

            skinmapper.ScalarVisibilityOff();
            vtkActor skin = new vtkActor();
            skin.SetMapper(skinmapper);

            vtkOutlineFilter outLineData = vtkOutlineFilter.New();
            outLineData.SetInputConnection(reader.GetOutputPort());
            vtkPolyDataMapper outlinemapper = vtkPolyDataMapper.New();

            outlinemapper.SetInputConnection(outLineData.GetOutputPort());

            vtkActor outline = vtkActor.New();
            outline.SetMapper(outlinemapper);
            outline.GetProperty().SetColor(0, 0, 0);

            vtkCamera acamera = render.GetActiveCamera();
            acamera.SetViewUp(0, 0, -1);
            acamera.SetPosition(0, 1, 0);
            acamera.SetFocalPoint(0, 0, 0);
            acamera.ComputeViewPlaneNormal();

            render.AddActor(outline);
            render.AddActor(skin);
            render.ResetCamera();
            acamera.Dolly(1.5);

            render.SetBackground(1, 1, 1);

            render.ResetCameraClippingRange();
            renwin.Render();
            iren.Initialize();
            iren.Start();
            
        }


    }