1 #include <vtkAutoInit.h>
2 VTK_MODULE_INIT(vtkRenderingOpenGL2);
3 VTK_MODULE_INIT(vtkRenderingFreeType);
4 VTK_MODULE_INIT(vtkInteractionStyle);
5
6 #include <vtkPolyData.h>
7 #include <vtkSphereSource.h>
8 #include <vtkDecimatePro.h>
9 #include <vtkQuadricDecimation.h>
10 #include <vtkQuadricClustering.h>
11 #include <vtkSmartPointer.h>
12 #include <vtkPolyDataMapper.h>
13 #include <vtkProperty.h>
14 #include <vtkRenderWindow.h>
15 #include <vtkRenderWindowInteractor.h>
16 #include <vtkRenderer.h>
17 #include <vtkPolydataReader.h>
18 #include <vtkCamera.h>
19
20 //测试文件：../data/fran_cut.vtk
21 int main(int argc, char * argv[])
22 {
23 vtkSmartPointer<vtkPolyDataReader> reader =
24 vtkSmartPointer<vtkPolyDataReader>::New();
25 reader->SetFileName("C:\\Users\\Administrator\\Desktop\\VTK2\\hellovtk\\vtk_图像处理学习\\第六章_图像处理\\data\\fran_cut.vtk");
26 reader->Update();
27 vtkSmartPointer<vtkPolyData> original = reader->GetOutput();
28
29 std::cout << "抽取前：" << std::endl << "------------" << std::endl;
30 std::cout << "模型点数为： " << original->GetNumberOfPoints() << std::endl;
31 std::cout << "模型面数为： " << original->GetNumberOfPolys() << std::endl;
32
33 vtkSmartPointer<vtkDecimatePro> decimate =
34 vtkSmartPointer<vtkDecimatePro>::New();
35 decimate->SetInputData(original);
36 decimate->SetTargetReduction(.80); //80%的三角面片被移除
37 decimate->Update();
38
39 vtkSmartPointer<vtkPolyData> decimated = decimate->GetOutput();
40 std::cout << "抽取后" << std::endl << "------------" << std::endl;
41 std::cout << "模型点数为：" << decimated->GetNumberOfPoints()<< std::endl;
42 std::cout << "模型面数为：" << decimated->GetNumberOfPolys()<< std::endl;
43
44 vtkSmartPointer<vtkPolyDataMapper> origianlMapper =
45 vtkSmartPointer<vtkPolyDataMapper>::New();
46 origianlMapper->SetInputData(original);
47
48 vtkSmartPointer<vtkActor> origianlActor =
49 vtkSmartPointer<vtkActor>::New();
50 origianlActor->SetMapper(origianlMapper);
51
52 vtkSmartPointer<vtkPolyDataMapper> decimatedMapper =
53 vtkSmartPointer<vtkPolyDataMapper>::New();
54 decimatedMapper->SetInputData(decimated);
55
56 vtkSmartPointer<vtkActor> decimatedActor =
57 vtkSmartPointer<vtkActor>::New();
58 decimatedActor->SetMapper(decimatedMapper);
59
60 double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
61 double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};
62
63 vtkSmartPointer<vtkRenderer> leftRenderer =
64 vtkSmartPointer<vtkRenderer>::New();
65 leftRenderer->SetViewport(leftViewport);
66 leftRenderer->AddActor(origianlActor);
67 leftRenderer->SetBackground(1.0, 1.0, 1.0);
68
69 vtkSmartPointer<vtkRenderer> rightRenderer =
70 vtkSmartPointer<vtkRenderer>::New();
71 rightRenderer->SetViewport(rightViewport);
72 rightRenderer->AddActor(decimatedActor);
73 rightRenderer->SetBackground(1.0, 1.0, 1.0);
74
75 leftRenderer->GetActiveCamera()->SetPosition(0, -1, 0);
76 leftRenderer->GetActiveCamera()->SetFocalPoint(0, 0, 0);
77 leftRenderer->GetActiveCamera()->SetViewUp(0, 0, 1);
78 leftRenderer->GetActiveCamera()->Azimuth(30);
79 leftRenderer->GetActiveCamera()->Elevation(30);
80 leftRenderer->ResetCamera();
81 rightRenderer->SetActiveCamera(leftRenderer->GetActiveCamera());
82
83 vtkSmartPointer<vtkRenderWindow> renderWindow =
84 vtkSmartPointer<vtkRenderWindow>::New();
85 renderWindow->AddRenderer(leftRenderer);
86 renderWindow->AddRenderer(rightRenderer);
87 renderWindow->SetSize(640, 320);
88 renderWindow->Render();
89 renderWindow->SetWindowName("PolyDataDecimation");
90
91 vtkSmartPointer<vtkRenderWindowInteractor> interactor =
92 vtkSmartPointer<vtkRenderWindowInteractor>::New();
93 interactor->SetRenderWindow(renderWindow);
94
95 renderWindow->Render();
96 interactor->Start();
97
98 return EXIT_SUCCESS;
99 }
