CellEdges

VTKExamples/Cxx/Meshes/CellEdges

Code

CellEdges.cxx

#include <vtkSmartPointer.h>
#include <vtkTriangle.h>
#include <vtkCellArray.h>
#include <vtkPolyData.h>
#include <vtkIdList.h>

int main(int, char *[])
{
  vtkSmartPointer<vtkTriangle> triangle =
    vtkSmartPointer<vtkTriangle>::New();
  triangle->GetPoints()->SetPoint(0, 1.0, 0.0, 0.0);
  triangle->GetPoints()->SetPoint(1, 0.0, 0.0, 0.0);
  triangle->GetPoints()->SetPoint(2, 0.0, 1.0, 0.0);
  triangle->GetPointIds()->SetId ( 0, 0 );
  triangle->GetPointIds()->SetId ( 1, 1 );
  triangle->GetPointIds()->SetId ( 2, 2 );

  std::cout << "The cell has " << triangle->GetNumberOfEdges()
            << " edges." << std::endl;

  for(vtkIdType i = 0; i < triangle->GetNumberOfEdges(); i++)
  {
    vtkCell* edge = triangle->GetEdge(i);

    vtkIdList* pointIdList = edge->GetPointIds();
    std::cout << "Edge " << i << " has " << pointIdList->GetNumberOfIds()
              << " points."  << std::endl;

    for(vtkIdType p = 0; p < pointIdList->GetNumberOfIds(); p++)
    {
      std::cout << "Edge " << i << " uses point " << pointIdList->GetId(p)
                << std::endl;
    }

  }


  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(CellEdges)

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

add_executable(CellEdges MACOSX_BUNDLE CellEdges.cxx )

target_link_libraries(CellEdges ${VTK_LIBRARIES})

Download and Build CellEdges

Click here to download CellEdges and its CMakeLists.txt file. Once the tarball CellEdges.tar has been downloaded and extracted,

cd CellEdges/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:

./CellEdges

WINDOWS USERS

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