VTK/Examples/Broken/CellLinks

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How to use vtkCellLinks::Links class? How to know how many cells GetCells returns?

CellLinks.cxx

#include <vtkSmartPointer.h>
#include <vtkSphereSource.h>
#include <vtkProperty.h>
#include <vtkCellLinks.h>

int main(int, char *[])
{
   //create an image data
  vtkSmartPointer<vtkSphereSource> sphereSource = 
      vtkSmartPointer<vtkSphereSource>::New();
  sphereSource->Update();
  
  vtkSmartPointer<vtkCellLinks> cellLinksFilter = 
      vtkSmartPointer<vtkCellLinks>::New();
  cellLinksFilter->BuildLinks(sphereSource->GetOutput());
  
  /*
  vtkCellLinks::Link link = cellLinksFilter->GetLink(0);
  
  cout << "There are " << link.ncells << endl;
  
  cout << "Point 0 is used by cells ";
  
  for(unsigned int i = 0; i < link.ncells; i++)
    {
    cout << link.cells[i] << endl;
    }
  */  
  
  vtkIdType* cells = cellLinksFilter->GetCells(0);
  
  cout << "Point 0 is used by cells ";
  
  for(unsigned int i = 0; i < 5; i++)
    {
    cout << cells[i] << endl;
    }
  
  return EXIT_SUCCESS;
}

Please try the new VTKExamples website.

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(CellLinks)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

add_executable(CellLinks MACOSX_BUNDLE CellLinks.cxx)

if(VTK_LIBRARIES)
  target_link_libraries(CellLinks ${VTK_LIBRARIES})
else()
  target_link_libraries(CellLinks vtkHybrid vtkWidgets)
endif()

Download and Build CellLinks

Click here to download CellLinks. and its CMakeLists.txt file.

Once the tarball CellLinks.tar has been downloaded and extracted,

cd CellLinks/build 
  • If VTK is installed:
cmake ..
  • If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:
cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

Build the project:

make

and run it:

./CellLinks

WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.