# EdgeListIterator

VTKExamples/Cxx/Graphs/EdgeListIterator

### Code

EdgeListIterator.cxx

    #include <vtkMutableUndirectedGraph.h>
    #include <vtkSmartPointer.h>
    #include <vtkEdgeListIterator.h>

    int main(int, char *[])
    {
      vtkSmartPointer<vtkMutableUndirectedGraph> g =
        vtkSmartPointer<vtkMutableUndirectedGraph>::New();

      // Create a graph
      vtkIdType v0 = g->AddVertex();
      vtkIdType v1 = g->AddVertex();
      vtkIdType v2 = g->AddVertex();

      g->AddEdge(v0, v1);
      g->AddEdge(v1, v2);
      g->AddEdge(v0, v2);

      vtkSmartPointer<vtkEdgeListIterator> edgeListIterator =
          vtkSmartPointer<vtkEdgeListIterator>::New();
      g->GetEdges(edgeListIterator);

      while(edgeListIterator->HasNext())
      {
        vtkEdgeType edge = edgeListIterator->Next();
        std::cout << "Edge: " << edge.Id << " is from "
              << "Source: " << edge.Source << " to Target: " << edge.Target << std::endl;
      }

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(EdgeListIterator)

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

    add_executable(EdgeListIterator MACOSX_BUNDLE EdgeListIterator.cxx)

    target_link_libraries(EdgeListIterator ${VTK_LIBRARIES})

### Download and Build EdgeListIterator

Danger

The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.

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

    cd EdgeListIterator/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:

    ./EdgeListIterator

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.