Difference between revisions of "VTK/Examples/Cxx/PolyData/ExtractSelectionCells"

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(Replaced content with "= '''See [https://lorensen.github.io/VTKExamples/site/Cxx/PolyData/ExtractSelectionCells ExtractSelectionCells] on the new [https://lorensen.github.io/VTKExamples/site/ VT...")
 
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<div class="floatcenter">[[File:VTK_Examples_Baseline_PolyData_TestExtractSelectionCells.png|600px]]</div>
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= '''See [https://lorensen.github.io/VTKExamples/site/Cxx/PolyData/ExtractSelectionCells ExtractSelectionCells] on the new [https://lorensen.github.io/VTKExamples/site/ VTKExamples website].''' =
==ExtractSelectionCells.cxx==
 
<source lang="cpp">
 
#include <vtkVersion.h>
 
#include <vtkSmartPointer.h>
 
 
 
#include <vtkCamera.h>
 
#include <vtkDataSetMapper.h>
 
#include <vtkExtractSelection.h>
 
#include <vtkIdTypeArray.h>
 
#include <vtkInformation.h>
 
#include <vtkPolyData.h>
 
#include <vtkProperty.h>
 
#include <vtkRenderWindow.h>
 
#include <vtkRenderWindowInteractor.h>
 
#include <vtkRenderer.h>
 
#include <vtkSelection.h>
 
#include <vtkSelectionNode.h>
 
#include <vtkSphereSource.h>
 
#include <vtkUnstructuredGrid.h>
 
 
 
int main(int, char *[])
 
{
 
  vtkSmartPointer<vtkSphereSource> sphereSource =
 
    vtkSmartPointer<vtkSphereSource>::New();
 
  sphereSource->Update();
 
 
 
  std::cout << "There are " << sphereSource->GetOutput()->GetNumberOfPoints()
 
            << " input points." << std::endl;
 
  std::cout << "There are " << sphereSource->GetOutput()->GetNumberOfCells()
 
            << " input cells." << std::endl;
 
           
 
  vtkSmartPointer<vtkIdTypeArray> ids =
 
      vtkSmartPointer<vtkIdTypeArray>::New();
 
  ids->SetNumberOfComponents(1);
 
 
 
  // Specify that we want to extract cells 10 through 19
 
  for(unsigned int i = 10; i < 20; i++)
 
    {
 
    ids->InsertNextValue(i);
 
    }
 
 
 
  vtkSmartPointer<vtkSelectionNode> selectionNode =
 
    vtkSmartPointer<vtkSelectionNode>::New();
 
  selectionNode->SetFieldType(vtkSelectionNode::CELL);
 
  selectionNode->SetContentType(vtkSelectionNode::INDICES);
 
  selectionNode->SetSelectionList(ids);
 
 
 
 
 
  vtkSmartPointer<vtkSelection> selection =
 
    vtkSmartPointer<vtkSelection>::New();
 
  selection->AddNode(selectionNode);
 
 
 
  vtkSmartPointer<vtkExtractSelection> extractSelection =
 
    vtkSmartPointer<vtkExtractSelection>::New();
 
  extractSelection->SetInputConnection(0, sphereSource->GetOutputPort());
 
#if VTK_MAJOR_VERSION <= 5
 
  extractSelection->SetInput(1, selection);
 
#else
 
  extractSelection->SetInputData(1, selection);
 
#endif
 
  extractSelection->Update();
 
 
 
  // In selection
 
  vtkSmartPointer<vtkUnstructuredGrid> selected =
 
    vtkSmartPointer<vtkUnstructuredGrid>::New();
 
  selected->ShallowCopy(extractSelection->GetOutput());
 
 
 
  std::cout << "There are " << selected->GetNumberOfPoints()
 
            << " points in the selection." << std::endl;
 
  std::cout << "There are " << selected->GetNumberOfCells()
 
            << " cells in the selection." << std::endl;
 
 
 
  // Get points that are NOT in the selection
 
  selectionNode->GetProperties()->Set(vtkSelectionNode::INVERSE(), 1); //invert the selection
 
  extractSelection->Update();
 
 
 
  vtkSmartPointer<vtkUnstructuredGrid> notSelected =
 
    vtkSmartPointer<vtkUnstructuredGrid>::New();
 
  notSelected->ShallowCopy(extractSelection->GetOutput());
 
 
 
  std::cout << "There are " << notSelected->GetNumberOfPoints()
 
            << " points NOT in the selection." << std::endl;
 
  std::cout << "There are " << notSelected->GetNumberOfCells()
 
            << " cells NOT in the selection." << std::endl;
 
 
 
 
 
  vtkSmartPointer<vtkProperty> backfaces =
 
    vtkSmartPointer<vtkProperty>::New();
 
  backfaces->SetColor(1, 0, 0);
 
 
 
  vtkSmartPointer<vtkDataSetMapper> inputMapper =
 
    vtkSmartPointer<vtkDataSetMapper>::New();
 
  inputMapper->SetInputConnection(sphereSource->GetOutputPort());
 
  vtkSmartPointer<vtkActor> inputActor =
 
    vtkSmartPointer<vtkActor>::New();
 
  inputActor->SetMapper(inputMapper);
 
  inputActor->SetBackfaceProperty(backfaces);
 
 
 
  vtkSmartPointer<vtkDataSetMapper> selectedMapper =
 
    vtkSmartPointer<vtkDataSetMapper>::New();
 
#if VTK_MAJOR_VERSION <= 5
 
  selectedMapper->SetInputConnection(selected->GetProducerPort());
 
#else
 
  selectedMapper->SetInputData(selected);
 
#endif
 
  vtkSmartPointer<vtkActor> selectedActor =
 
    vtkSmartPointer<vtkActor>::New();
 
  selectedActor->SetMapper(selectedMapper);
 
  selectedActor->SetBackfaceProperty(backfaces);
 
 
 
  vtkSmartPointer<vtkDataSetMapper> notSelectedMapper =
 
    vtkSmartPointer<vtkDataSetMapper>::New();
 
#if VTK_MAJOR_VERSION <= 5
 
  notSelectedMapper->SetInputConnection(notSelected->GetProducerPort());
 
#else
 
  notSelectedMapper->SetInputData(notSelected);
 
#endif
 
  vtkSmartPointer<vtkActor> notSelectedActor =
 
    vtkSmartPointer<vtkActor>::New();
 
  notSelectedActor->SetMapper(notSelectedMapper);
 
  notSelectedActor->SetBackfaceProperty(backfaces);
 
 
 
  // There will be one render window
 
  vtkSmartPointer<vtkRenderWindow> renderWindow =
 
    vtkSmartPointer<vtkRenderWindow>::New();
 
  renderWindow->SetSize(900, 300);
 
 
 
  // And one interactor
 
  vtkSmartPointer<vtkRenderWindowInteractor> interactor =
 
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
 
  interactor->SetRenderWindow(renderWindow);
 
 
 
  // Define viewport ranges
 
  // (xmin, ymin, xmax, ymax)
 
  double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
 
  double centerViewport[4] = {0.33, 0.0, .66, 1.0};
 
  double rightViewport[4] = {0.66, 0.0, 1.0, 1.0};
 
 
 
  // Create a camera for all renderers
 
  vtkSmartPointer<vtkCamera> camera =
 
    vtkSmartPointer<vtkCamera>::New();
 
 
 
  // Setup the renderers
 
  vtkSmartPointer<vtkRenderer> leftRenderer =
 
    vtkSmartPointer<vtkRenderer>::New();
 
  renderWindow->AddRenderer(leftRenderer);
 
  leftRenderer->SetViewport(leftViewport);
 
  leftRenderer->SetBackground(.6, .5, .4);
 
  leftRenderer->SetActiveCamera(camera);
 
 
 
  vtkSmartPointer<vtkRenderer> centerRenderer =
 
    vtkSmartPointer<vtkRenderer>::New();
 
  renderWindow->AddRenderer(centerRenderer);
 
  centerRenderer->SetViewport(centerViewport);
 
  centerRenderer->SetBackground(.3, .1, .4);
 
  centerRenderer->SetActiveCamera(camera);
 
 
 
  vtkSmartPointer<vtkRenderer> rightRenderer =
 
    vtkSmartPointer<vtkRenderer>::New();
 
  renderWindow->AddRenderer(rightRenderer);
 
  rightRenderer->SetViewport(rightViewport);
 
  rightRenderer->SetBackground(.4, .5, .6);
 
  rightRenderer->SetActiveCamera(camera);
 
 
 
  leftRenderer->AddActor(inputActor);
 
  centerRenderer->AddActor(selectedActor);
 
  rightRenderer->AddActor(notSelectedActor);
 
 
 
  leftRenderer->ResetCamera();
 
 
 
  renderWindow->Render();
 
  interactor->Start();
 
 
 
  return EXIT_SUCCESS;
 
}
 
</source>
 
 
 
{{VTKCMakeLists|{{SUBPAGENAME}}}}
 

Latest revision as of 16:57, 9 September 2019

See ExtractSelectionCells on the new VTKExamples website.