VTK/Examples/Cxx/Broken/Graphs/Conversions/MutableUndirectedGraphToMutableDirectedGraph

This conversion should be possible and simply use a default directedness for the new edges.

MutableUndirectedGraphToMutableDirectedGraph.cxx

#include <vtkSmartPointer.h>
#include <vtkPoints.h>
#include <vtkMutableDirectedGraph.h>
#include <vtkMutableUndirectedGraph.h>

int main (int, char *[])
{
  
  //create a graph
  vtkSmartPointer<vtkMutableUndirectedGraph> mug =
    vtkSmartPointer<vtkMutableUndirectedGraph>::New();

  //add 4 vertices to the graph
  vtkIdType v1 = mug->AddVertex();
  vtkIdType v2 = mug->AddVertex();
  vtkIdType v3 = mug->AddVertex();
  vtkIdType v4 = mug->AddVertex();

  //add 3 edges to the graph
  mug->AddEdge ( v1, v2 );
  mug->AddEdge ( v1, v3 );
  mug->AddEdge ( v1, v4 );

  //create 4 points - one for each vertex
  vtkSmartPointer<vtkPoints> points =
      vtkSmartPointer<vtkPoints>::New();
  points->InsertNextPoint(0.0, 0.0, 0.0);
  points->InsertNextPoint(1.0, 0.0, 0.0);
  points->InsertNextPoint(0.0, 1.0, 0.0);
  points->InsertNextPoint(0.0, 0.0, 2.0);

  //add the coordinates of the points to the graph
  mug->SetPoints(points);

  std::cout << "MUG: " << std::endl;
  std::cout << "Type: " << mug->GetClassName() << std::endl;
  std::cout << "Vertices: " << mug->GetNumberOfVertices() << std::endl;
  std::cout << "Edges: " << mug->GetNumberOfEdges() << std::endl;

  vtkSmartPointer<vtkMutableDirectedGraph> mdg =
      vtkSmartPointer<vtkMutableDirectedGraph>::New();
  if(!mdg->CheckedShallowCopy(mug))
    {
    std::cerr << "Could not convert!" << std::endl;
    return EXIT_FAILURE;
    }

  std::cout << "MDG: " << std::endl;
  std::cout << "Type: " << mdg->GetClassName() << std::endl;
  std::cout << "Vertices: " << mdg->GetNumberOfVertices() << std::endl;
  std::cout << "Edges: " << mdg->GetNumberOfEdges() << std::endl;


  return EXIT_SUCCESS;
}

Please try the new VTKExamples website.

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(MutableUndirectedGraphToMutableDirectedGraph)

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

add_executable(MutableUndirectedGraphToMutableDirectedGraph MACOSX_BUNDLE MutableUndirectedGraphToMutableDirectedGraph.cxx)

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

Download and Build MutableUndirectedGraphToMutableDirectedGraph

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

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

cd MutableUndirectedGraphToMutableDirectedGraph/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:

./MutableUndirectedGraphToMutableDirectedGraph

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.