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| − | When a cube is created, it has 24 vertices (4 for each face). This is done because
| + | = '''See [https://lorensen.github.io/VTKExamples/site/Cxx/PolyData/CleanPolyData CleanPolyData] on the new [https://lorensen.github.io/VTKExamples/site/ VTKExamples website].''' = |
| − | the normal at each face is very different. Often we would want a cube to only have 8 vertices. The vtkCleanPolyData filter removes coincident points, resulting in the cube we would expect.
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| − | ==CleanPolyData.cxx== | |
| − | <source lang="cpp">
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| − | #include <vtkSmartPointer.h>
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| − | #include <vtkCubeSource.h>
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| − | #include <vtkPolyData.h>
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| − | #include <vtkCleanPolyData.h>
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| − | | |
| − | int main(int, char *[])
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| − | {
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| − | vtkSmartPointer<vtkCubeSource> cubeSource =
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| − | vtkSmartPointer<vtkCubeSource>::New();
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| − | cubeSource->Update();
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| − |
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| − | std::cout << "Input cube has " << cubeSource->GetOutput()->GetNumberOfPoints()
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| − | << " vertices." << std::endl;
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| − |
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| − | vtkSmartPointer<vtkCleanPolyData> cleanPolyData =
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| − | vtkSmartPointer<vtkCleanPolyData>::New();
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| − | cleanPolyData->SetInputConnection(cubeSource->GetOutputPort());
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| − | cleanPolyData->Update();
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| − |
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| − | std::cout << "Cleaned cube has " << cleanPolyData->GetOutput()->GetNumberOfPoints()
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| − | << " vertices." << std::endl;
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| − |
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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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| − | | |
| − | Show the normals - this will show that there is more than one normal at each point before, and exactly one after.
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| − | [[Category:VTKAddVisualization]] | |
