EdgeListIterator

vtk-examples/Cxx/Graphs/EdgeListIterator

Question

If you have a question about this example, please use the VTK Discourse Forum

Code¶

EdgeListIterator.cxx

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

int main(int, char*[])
{
  vtkNew<vtkMutableUndirectedGraph> g;

  // 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);

  vtkNew<vtkEdgeListIterator> edgeListIterator;
  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 3.12 FATAL_ERROR)

project(EdgeListIterator)

find_package(VTK COMPONENTS 
)

if (NOT VTK_FOUND)
  message(FATAL_ERROR "EdgeListIterator: Unable to find the VTK build folder.")
endif()

# Prevent a "command line is too long" failure in Windows.
set(CMAKE_NINJA_FORCE_RESPONSE_FILE "ON" CACHE BOOL "Force Ninja to use response files.")
add_executable(EdgeListIterator MACOSX_BUNDLE EdgeListIterator.cxx )
  target_link_libraries(EdgeListIterator PRIVATE ${VTK_LIBRARIES}
)
# vtk_module_autoinit is needed
vtk_module_autoinit(
  TARGETS EdgeListIterator
  MODULES ${VTK_LIBRARIES}
)

Download and Build EdgeListIterator¶

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

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