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| − | <div class="floatright">[[File:VTK_Examples_Baseline_Meshes_TestQuadricDecimation.png|300px]]</div>
| + | = '''See [https://lorensen.github.io/VTKExamples/site/Cxx/Meshes/QuadricDecimation QuadricDecimation] on the new [https://lorensen.github.io/VTKExamples/site/ VTKExamples website].''' = |
| − | ==QuadricDecimation.cxx==
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| − | <source lang="cpp">
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| − | #include <vtkVersion.h>
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| − | #include <vtkPolyData.h>
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| − | #include <vtkSphereSource.h>
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| − | #include <vtkQuadricDecimation.h>
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| − | #include <vtkXMLPolyDataReader.h>
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| − | #include <vtkSmartPointer.h>
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| − | #include <vtkPolyDataMapper.h>
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| − | #include <vtkProperty.h>
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| − | #include <vtkRenderWindow.h>
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| − | #include <vtkRenderWindowInteractor.h>
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| − | #include <vtkRenderer.h>
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| − | #include <vtkCamera.h>
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| − | | |
| − | int main(int argc, char *argv[])
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| − | {
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| − | vtkSmartPointer<vtkPolyData> inputPolyData;
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| − | if(argc > 1)
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| − | {
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| − | vtkSmartPointer<vtkXMLPolyDataReader> reader =
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| − | vtkSmartPointer<vtkXMLPolyDataReader>::New();
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| − | reader->SetFileName(argv[1]);
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| − | reader->Update();
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| − | inputPolyData = reader->GetOutput();
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| − | }
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| − | else
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| − | {
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| − | vtkSmartPointer<vtkSphereSource> sphereSource =
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| − | vtkSmartPointer<vtkSphereSource>::New();
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| − | sphereSource->SetThetaResolution(30);
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| − | sphereSource->SetPhiResolution(15);
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| − | sphereSource->Update();
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| − | inputPolyData = sphereSource->GetOutput();
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| − | }
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| − | | |
| − | std::cout << "Before decimation" << std::endl << "------------" << std::endl;
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| − | std::cout << "There are "
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| − | << inputPolyData->GetNumberOfPoints() << " points." << std::endl;
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| − | std::cout << "There are "
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| − | << inputPolyData->GetNumberOfPolys() << " polygons." << std::endl;
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| − | | |
| − | vtkSmartPointer<vtkQuadricDecimation> decimate =
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| − | vtkSmartPointer<vtkQuadricDecimation>::New();
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| − | #if VTK_MAJOR_VERSION <= 5
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| − | decimate->SetInputConnection(inputPolyData->GetProducerPort());
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| − | #else
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| − | decimate->SetInputData(inputPolyData);
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| − | #endif
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| − | decimate->Update();
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| − | | |
| − | vtkSmartPointer<vtkPolyData> decimated =
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| − | vtkSmartPointer<vtkPolyData>::New();
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| − | decimated->ShallowCopy(decimate->GetOutput());
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| − | | |
| − | std::cout << "After decimation" << std::endl << "------------" << std::endl;
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| − | | |
| − | std::cout << "There are "
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| − | << decimated->GetNumberOfPoints() << " points." << std::endl;
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| − | std::cout << "There are "
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| − | << decimated->GetNumberOfPolys() << " polygons." << std::endl;
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| − | | |
| − | vtkSmartPointer<vtkPolyDataMapper> inputMapper =
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| − | vtkSmartPointer<vtkPolyDataMapper>::New();
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| − | #if VTK_MAJOR_VERSION <= 5
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| − | inputMapper->SetInputConnection(inputPolyData->GetProducerPort());
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| − | #else
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| − | inputMapper->SetInputData(inputPolyData);
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| − | #endif
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| − | vtkSmartPointer<vtkActor> inputActor =
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| − | vtkSmartPointer<vtkActor>::New();
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| − | inputActor->SetMapper(inputMapper);
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| − | inputActor->GetProperty()->SetInterpolationToFlat();
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| − | | |
| − | vtkSmartPointer<vtkPolyDataMapper> decimatedMapper =
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| − | vtkSmartPointer<vtkPolyDataMapper>::New();
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| − | #if VTK_MAJOR_VERSION <= 5
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| − | decimatedMapper->SetInputConnection(decimated->GetProducerPort());
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| − | #else
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| − | decimatedMapper->SetInputData(decimated);
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| − | #endif
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| − | vtkSmartPointer<vtkActor> decimatedActor =
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| − | vtkSmartPointer<vtkActor>::New();
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| − | decimatedActor->SetMapper(decimatedMapper);
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| − | | |
| − | // There will be one render window
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| − | vtkSmartPointer<vtkRenderWindow> renderWindow =
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| − | vtkSmartPointer<vtkRenderWindow>::New();
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| − | renderWindow->SetSize(600, 300);
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| − | | |
| − | // And one interactor
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| − | vtkSmartPointer<vtkRenderWindowInteractor> interactor =
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| − | vtkSmartPointer<vtkRenderWindowInteractor>::New();
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| − | interactor->SetRenderWindow(renderWindow);
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| − | | |
| − | // Define viewport ranges
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| − | // (xmin, ymin, xmax, ymax)
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| − | double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
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| − | double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};
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| − | | |
| − | // Setup both renderers
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| − | vtkSmartPointer<vtkRenderer> leftRenderer =
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| − | vtkSmartPointer<vtkRenderer>::New();
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| − | renderWindow->AddRenderer(leftRenderer);
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| − | leftRenderer->SetViewport(leftViewport);
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| − | leftRenderer->SetBackground(.6, .5, .4);
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| − | | |
| − | vtkSmartPointer<vtkRenderer> rightRenderer =
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| − | vtkSmartPointer<vtkRenderer>::New();
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| − | renderWindow->AddRenderer(rightRenderer);
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| − | rightRenderer->SetViewport(rightViewport);
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| − | rightRenderer->SetBackground(.4, .5, .6);
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| − | | |
| − | // Add the sphere to the left and the cube to the right
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| − | leftRenderer->AddActor(inputActor);
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| − | rightRenderer->AddActor(decimatedActor);
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| − | | |
| − | vtkSmartPointer<vtkCamera> camera =
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| − | vtkSmartPointer<vtkCamera>::New();
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| − | leftRenderer->SetActiveCamera(camera);
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| − | rightRenderer->SetActiveCamera(camera);
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| − | | |
| − | leftRenderer->ResetCamera();
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| − | | |
| − | renderWindow->Render();
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| − | interactor->Start();
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| − | | |
| − | return EXIT_SUCCESS;
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| − | }
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| − | </source>
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| − | | |
| − | {{VTKCMakeLists|{{SUBPAGENAME}}}}
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