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| − | ==ExtractSelectionCells.cxx== | + | = '''See [https://lorensen.github.io/VTKExamples/site/Cxx/PolyData/ExtractSelectionCells ExtractSelectionCells] on the new [https://lorensen.github.io/VTKExamples/site/ VTKExamples website].''' = |
| − | <source lang="cpp">
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| − | #include <vtkSmartPointer.h>
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| − | #include <vtkInformation.h>
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| − | #include <vtkPointSource.h>
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| − | #include <vtkExtractSelection.h>
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| − | #include <vtkSelection.h>
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| − | #include <vtkSelectionNode.h>
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| − | #include <vtkPolyData.h>
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| − | #include <vtkUnstructuredGrid.h>
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| − | #include <vtkIdTypeArray.h>
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| − | | |
| − | int main(int argc, char *argv[])
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| − | {
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| − | vtkSmartPointer<vtkPointSource> pointSource =
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| − | vtkSmartPointer<vtkPointSource>::New();
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| − | pointSource->SetNumberOfPoints(50);
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| − | pointSource->Update();
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| − |
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| − | cout << "There are " << pointSource->GetOutput()->GetNumberOfPoints() << " input points." << endl;
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| − |
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| − | vtkSmartPointer<vtkIdTypeArray> ids =
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| − | vtkSmartPointer<vtkIdTypeArray>::New();
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| − | ids->SetNumberOfComponents(1);
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| − |
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| − | //set values
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| − | for(unsigned int i = 10; i < 20; i++)
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| − | {
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| − | ids->InsertNextValue(i);
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| − | }
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| − |
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| − | vtkSmartPointer<vtkSelectionNode> selectionNode =
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| − | vtkSmartPointer<vtkSelectionNode>::New();
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| − | selectionNode->SetFieldType(vtkSelectionNode::CELL);
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| − | selectionNode->SetContentType(vtkSelectionNode::INDICES);
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| − | selectionNode->SetSelectionList(ids);
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| − |
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| − |
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| − | vtkSmartPointer<vtkSelection> selection =
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| − | vtkSmartPointer<vtkSelection>::New();
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| − | selection->AddNode(selectionNode);
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| − |
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| − | vtkSmartPointer<vtkExtractSelection> extractSelection =
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| − | vtkSmartPointer<vtkExtractSelection>::New();
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| − |
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| − | //extractSelection->SetInput(0, selection);
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| − | //extractSelection->SetInput(1, pointSource->GetOutput());
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| − |
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| − | extractSelection->SetInput(0, pointSource->GetOutput());
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| − | extractSelection->SetInput(1, selection);
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| − |
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| − | extractSelection->Update();
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| − |
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| − | //in selection
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| − | vtkDataSet* ds = vtkDataSet::SafeDownCast (extractSelection->GetOutput());
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| − | cout << "There are " << ds->GetNumberOfPoints() << " points in the selection." << endl;
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| − | cout << "There are " << ds->GetNumberOfCells() << " cells in the selection." << endl;
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| − |
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| − | //not in selection
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| − | selectionNode->GetProperties()->Set(vtkSelectionNode::INVERSE(), 1); //invert the selection
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| − | extractSelection->Update();
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| − | cout << "There are " << vtkDataSet::SafeDownCast (extractSelection->GetOutput())->GetNumberOfPoints() << " points not in the selection." << 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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| − | | |
| − | ==CMakeLists.txt==
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| − | <source lang="cmake">
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| − | cmake_minimum_required(VERSION 2.6)
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| − | PROJECT(ExtractSelection)
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| − | | |
| − | FIND_PACKAGE(VTK REQUIRED)
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| − | INCLUDE(${VTK_USE_FILE})
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| − | | |
| − | ADD_EXECUTABLE(ExtractSelectionCells ExtractSelectionCells.cxx)
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| − | TARGET_LINK_LIBRARIES(ExtractSelectionCells vtkHybrid)
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| − | | |
| − | </source>
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