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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==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">
 
#include <vtkSmartPointer.h>
 
#include <vtkInformation.h>
 
#include <vtkPointSource.h>
 
#include <vtkExtractSelection.h>
 
#include <vtkSelection.h>
 
#include <vtkSelectionNode.h>
 
#include <vtkPolyData.h>
 
#include <vtkUnstructuredGrid.h>
 
#include <vtkIdTypeArray.h>
 
 
 
int main(int, char *[])
 
{
 
  vtkSmartPointer<vtkPointSource> pointSource =
 
      vtkSmartPointer<vtkPointSource>::New();
 
  pointSource->SetNumberOfPoints(50);
 
  pointSource->Update();
 
 
 
  cout << "There are " << pointSource->GetOutput()->GetNumberOfPoints() << " input points." << endl;
 
 
 
  vtkSmartPointer<vtkIdTypeArray> ids =
 
      vtkSmartPointer<vtkIdTypeArray>::New();
 
  ids->SetNumberOfComponents(1);
 
 
 
  //set values
 
  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->SetInput(0, selection);
 
  //extractSelection->SetInput(1, pointSource->GetOutput());
 
 
 
  extractSelection->SetInput(0, pointSource->GetOutput());
 
  extractSelection->SetInput(1, selection);
 
   
 
  extractSelection->Update();
 
 
 
  //in selection
 
  vtkDataSet* ds = vtkDataSet::SafeDownCast (extractSelection->GetOutput());
 
  cout << "There are " << ds->GetNumberOfPoints() << " points in the selection." << endl;
 
  cout << "There are " << ds->GetNumberOfCells() << " cells in the selection." << endl;
 
 
 
  //not in selection
 
  selectionNode->GetProperties()->Set(vtkSelectionNode::INVERSE(), 1); //invert the selection
 
  extractSelection->Update();
 
  cout << "There are " << vtkDataSet::SafeDownCast (extractSelection->GetOutput())->GetNumberOfPoints() << " points not in the selection." << endl;
 
 
 
  return EXIT_SUCCESS;
 
}
 
 
 
</source>
 
 
 
==CMakeLists.txt==
 
<source lang="cmake">
 
cmake_minimum_required(VERSION 2.6)
 
PROJECT(ExtractSelectionCells)
 
 
 
FIND_PACKAGE(VTK REQUIRED)
 
INCLUDE(${VTK_USE_FILE})
 
 
 
ADD_EXECUTABLE(ExtractSelectionCells ExtractSelectionCells.cxx)
 
TARGET_LINK_LIBRARIES(ExtractSelectionCells vtkHybrid)
 
 
 
</source>
 

Latest revision as of 17:57, 9 September 2019