1 #include <vtkAutoInit.h>
2 VTK_MODULE_INIT(vtkRenderingOpenGL2);
3 VTK_MODULE_INIT(vtkRenderingFreeType);
4 VTK_MODULE_INIT(vtkInteractionStyle);
5
6 #include <vtkSmartPointer.h>
7 #include <vtkSphereSource.h>
8 #include <vtkConeSource.h>
9 #include <vtkPolyDataConnectivityFilter.h>
10 #include <vtkPolyDataMapper.h>
11 #include <vtkActor.h>
12 #include <vtkProperty.h>
13 #include <vtkRenderer.h>
14 #include <vtkRenderWindow.h>
15 #include <vtkRenderWindowInteractor.h>
16 #include <vtkAppendPolyData.h>
17
18 int main(int, char *[])
19 {
20 vtkSmartPointer<vtkSphereSource> sphereSource =
21 vtkSmartPointer<vtkSphereSource>::New();
22 sphereSource->SetRadius(10);
23 sphereSource->SetThetaResolution(10);
24 sphereSource->SetPhiResolution(10);
25 sphereSource->Update();
26
27 vtkSmartPointer<vtkConeSource> coneSource =
28 vtkSmartPointer<vtkConeSource>::New();
29 coneSource->SetRadius(5);
30 coneSource->SetHeight(10);
31 coneSource->SetCenter(25,0,0);
32 coneSource->Update();
33
34 vtkSmartPointer<vtkAppendPolyData> appendFilter =
35 vtkSmartPointer<vtkAppendPolyData>::New();
36 appendFilter->AddInputData(sphereSource->GetOutput());
37 appendFilter->AddInputData(coneSource->GetOutput());
38 appendFilter->Update();
39
40 vtkSmartPointer<vtkPolyDataConnectivityFilter> connectivityFilter =
41 vtkSmartPointer<vtkPolyDataConnectivityFilter>::New();
42 connectivityFilter->SetInputData(appendFilter->GetOutput());
43 connectivityFilter->SetExtractionModeToCellSeededRegions();
44 connectivityFilter->AddSeed(100);
45 connectivityFilter->Update();
46
47 vtkSmartPointer<vtkPolyDataMapper> originalMapper =
48 vtkSmartPointer<vtkPolyDataMapper>::New();
49 originalMapper->SetInputConnection(appendFilter->GetOutputPort());
50 originalMapper->Update();
51
52 vtkSmartPointer<vtkActor> originalActor =
53 vtkSmartPointer<vtkActor>::New();
54 originalActor->SetMapper(originalMapper);
55
56 vtkSmartPointer<vtkPolyDataMapper> extractedMapper =
57 vtkSmartPointer<vtkPolyDataMapper>::New();
58 extractedMapper->SetInputConnection(connectivityFilter->GetOutputPort());
59 extractedMapper->Update();
60
61 vtkSmartPointer<vtkActor> extractedActor =
62 vtkSmartPointer<vtkActor>::New();
63 extractedActor->SetMapper(extractedMapper);
64
65 double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
66 double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};
67
68 vtkSmartPointer<vtkRenderer> leftRenderer =
69 vtkSmartPointer<vtkRenderer>::New();
70 leftRenderer->SetViewport(leftViewport);
71 leftRenderer->AddActor(originalActor);
72 leftRenderer->SetBackground(0.8, 0.8, 0.8);
73
74 vtkSmartPointer<vtkRenderer> rightRenderer =
75 vtkSmartPointer<vtkRenderer>::New();
76 rightRenderer->SetViewport(rightViewport);
77 rightRenderer->AddActor(extractedActor);
78 rightRenderer->SetBackground(1.0, 1.0, 1.0);
79
80 vtkSmartPointer<vtkRenderWindow> renderWindow =
81 vtkSmartPointer<vtkRenderWindow>::New();
82 renderWindow->AddRenderer(leftRenderer);
83 renderWindow->AddRenderer(rightRenderer);
84 renderWindow->SetSize(640, 320);
85 renderWindow->Render();
86 renderWindow->SetWindowName("PolyDataConnectedCompExtract");
87
88 leftRenderer->ResetCamera();
89 rightRenderer->SetActiveCamera(leftRenderer->GetActiveCamera());
90
91 vtkSmartPointer<vtkRenderWindowInteractor> interactor =
92 vtkSmartPointer<vtkRenderWindowInteractor>::New();
93 interactor->SetRenderWindow(renderWindow);
94 interactor->Initialize();
95 interactor->Start();
96
97 return EXIT_SUCCESS;
98 }
SetExtractionModeToLargestRegion()：用于提取具有最多点数的连通区域；
SetExtractionModeToAllRegions()：该模式主要用于连通区域标记，配合函数ColorRegionsOn()使用，在连通区域像是的同时，生成一个名为RegionId的点属性数据。
SetExtractionModeToSpecifiedRegions()：该模式用于提取一个或多个连通区域，在该模式下，需要通过AddSpecifiedRegion()来添加西药提取的区域号，区域号从零开始。
SetExtractionModeToClosestPointRegion()：该模式需要使用SetClosestPoint()函数设置一个空间点坐标，执行结果为离该点最近的连通区域。
SetExtractionModeToPointSeededRegions()：该模式下需要使用AddSeed()函数添加种子点，提取种子点所在的区域。
SetExtractionModeToCellSeededRegions()：该模式下需要使用AddSeed()函数调价种子单元，提取种子单元所在的区域。
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