VTK系列69_VTK格式文件的读取与渲染显示

亦凉 2022-09-03 04:15 303阅读 0赞

#  **实例10：VTK格式文件的读取与渲染显示** #

#include "vtkAutoInit.h" 
    VTK_MODULE_INIT(vtkRenderingOpenGL2);
    VTK_MODULE_INIT(vtkInteractionStyle);
    
    #include "vtkRenderer.h"//绘制器
    #include "vtkRenderWindow.h"//绘制窗口
    #include "vtkRenderWindowInteractor.h"//加入交互机制类
    #include "vtkDICOMImageReader.h"//DCM医学文件读取类
    #include "vtkPolyDataMapper.h"//数据映射
    #include "vtkActor.h"//演员
    #include "vtkOutlineFilter.h"
    #include "vtkCamera.h"//照相机
    #include "vtkProperty.h"//属性设置类
    #include "vtkPolyDataNormals.h"//vtkPolyData为多边形数据
    #include "vtkContourFilter.h"//等值面提取类（可以接受任何的数据类型生成等值线或者等值面）
    
    #include "vtkPolyDataWriter.h"//保存为.vtk图像类
    #include "vtkPolyDataReader.h"//读取.vtk图像类
    
    void main()
    {
    
        // Create the renderer, the render window, and the interactor. The renderer
        // draws into the render window, the interactor enables mouse- and 
        // keyboard-based interaction with the data within the render window.
        //创建渲染器、渲染窗口和交互器。
        //绘制到渲染窗口，交互器启用，渲染窗口内的数据进行基于鼠标和键盘的交互。
        vtkRenderer* aRenderer = vtkRenderer::New();
        vtkRenderWindow* renWin = vtkRenderWindow::New();
        renWin->AddRenderer(aRenderer);
        vtkRenderWindowInteractor* iren = vtkRenderWindowInteractor::New();
        iren->SetRenderWindow(renWin);
    
        //读取vtk格式图像
        vtkPolyDataReader* v16 = vtkPolyDataReader::New();
        v16->SetFileName("spine.vtk");
    
        vtkPolyDataMapper* skinMapper = vtkPolyDataMapper::New();
        skinMapper->SetInputConnection(v16->GetOutputPort());
        skinMapper->ScalarVisibilityOff();//这样不会带颜色
        vtkActor* skin = vtkActor::New();
        skin->SetMapper(skinMapper);
    
        // An outline provides context around the data.
        vtkOutlineFilter* outlineData = vtkOutlineFilter::New();
        outlineData->SetInputConnection(v16->GetOutputPort());
        vtkPolyDataMapper* mapOutline = vtkPolyDataMapper::New();
        mapOutline->SetInputConnection(outlineData->GetOutputPort());
        vtkActor* outline = vtkActor::New();
        outline->SetMapper(mapOutline);
        outline->GetProperty()->SetColor(0, 0, 0);
    
        // It is convenient to create an initial view of the data. The FocalPoint
        // and Position form a vector direction. Later on (ResetCamera() method)
        // this vector is used to position the camera to look at the data in
        // this direction.
        //相机设置
        vtkCamera* aCamera = vtkCamera::New();
        aCamera->SetViewUp(0, 0, -1);
        aCamera->SetPosition(0, 1, 0);
        aCamera->SetFocalPoint(0, 0, 0);
        aCamera->ComputeViewPlaneNormal();
    
        // Actors are added to the renderer. An initial camera view is created.
        // The Dolly() method moves the camera towards the FocalPoint,
        // thereby enlarging the image.
        //渲染
        aRenderer->AddActor(outline);
        aRenderer->AddActor(skin);
        aRenderer->SetActiveCamera(aCamera);
        aRenderer->ResetCamera();
        aCamera->Dolly(1.5);
    
        // Set a background color for the renderer and set the size of the
        // render window (expressed in pixels).
        //设置背景色和窗口大小
        aRenderer->SetBackground(1, 1, 1);
        renWin->SetSize(640, 480);
    
        // Note that when camera movement occurs (as it does in the Dolly()
        // method), the clipping planes often need adjusting. Clipping planes
        // consist of two planes: near and far along the view direction. The 
        // near plane clips out objects in front of the plane; the far plane
        // clips out objects behind the plane. This way only what is drawn
        // between the planes is actually rendered.
        aRenderer->ResetCameraClippingRange();
    
        // Initialize the event loop and then start it.
        iren->Initialize();
        iren->Start();
    
        // It is important to delete all objects created previously to prevent
        // memory leaks. In this case, since the program is on its way to
        // exiting, it is not so important. But in applications it is
        // essential.
        //释放内存
        v16->Delete();
        /*skinExtractor->Delete();
        skinNormals->Delete();*/
        skinMapper->Delete();
        skin->Delete();
        outlineData->Delete();
        mapOutline->Delete();
        outline->Delete();
        aCamera->Delete();
        iren->Delete();
        renWin->Delete();
        aRenderer->Delete();
    
    }

![20210414092015156.png][]

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**[本例程配套素材见源码整理文章下载（点击进入）][Link 1]**

## **VTK系列目录：** ##

## **[1 VTK基本概念][1 VTK]** ##

## **[2 VTK图像处理][2 VTK]** ##

## **[3 VTK图形处理][3 VTK]** ##

## **[4 VTK体绘制][4 VTK]** ##

[20210414092015156.png]: /images/20220829/4e2746784e0d4e7a8df243ec3bd8106a.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20210414091924694.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20210414092110919.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz_size_16_color_FFFFFF_t_70 2]: /images/20220829/6511bd273c504750a36d7915ac5800fb.png
[Link 1]: https://blog.csdn.net/qq_32809093/article/details/115689942
[1 VTK]: https://blog.csdn.net/qq_32809093/article/details/105380666
[2 VTK]: https://blog.csdn.net/qq_32809093/article/details/107083519
[3 VTK]: https://blog.csdn.net/qq_32809093/article/details/107083554
[4 VTK]: https://blog.csdn.net/qq_32809093/article/details/107126102