MutableGraphHelper

VTKEx/Cxx/InfoVis/MutableGraphHelper

Question

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Code

MutableGraphHelper.cxx

#include <vtkSmartPointer.h>
#include <vtkMutableDirectedGraph.h>
#include <vtkMutableUndirectedGraph.h>
#include <vtkMutableGraphHelper.h>
#include <vtkGraphLayoutView.h>
#include <vtkRenderWindowInteractor.h>

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

  vtkSmartPointer<vtkMutableGraphHelper> graphHelper =
    vtkSmartPointer<vtkMutableGraphHelper>::New();
  graphHelper->SetGraph(g);
  vtkIdType v0 = graphHelper->AddVertex();
  vtkIdType v1 = graphHelper->AddVertex();

  graphHelper->AddEdge(v0, v1);

  // Can also do this:
  graphHelper->RemoveEdge(0);

  vtkSmartPointer<vtkGraphLayoutView> treeLayoutView =
    vtkSmartPointer<vtkGraphLayoutView>::New();
  treeLayoutView->AddRepresentationFromInput(graphHelper->GetGraph());
  treeLayoutView->SetLayoutStrategyToTree();
  treeLayoutView->ResetCamera();
  treeLayoutView->Render();
  treeLayoutView->GetInteractor()->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(MutableGraphHelper)

find_package(VTK COMPONENTS 
  vtkvtkCommonCore
  vtkvtkCommonDataModel
  vtkvtkInfovisCore
  vtkvtkInteractionStyle
  vtkvtkRenderingContextOpenGL2
  vtkvtkRenderingCore
  vtkvtkRenderingFreeType
  vtkvtkRenderingGL2PSOpenGL2
  vtkvtkRenderingOpenGL2
  vtkvtkViewsInfovis QUIET)
if (NOT VTK_FOUND)
  message("Skipping MutableGraphHelper: ${VTK_NOT_FOUND_MESSAGE}")
  return ()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
  # old system
  include(${VTK_USE_FILE})
  add_executable(MutableGraphHelper MACOSX_BUNDLE MutableGraphHelper.cxx )
  target_link_libraries(MutableGraphHelper PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(MutableGraphHelper MACOSX_BUNDLE MutableGraphHelper.cxx )
  target_link_libraries(MutableGraphHelper PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS MutableGraphHelper
    MODULES ${VTK_LIBRARIES}
    )
endif ()

Download and Build MutableGraphHelper

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

cd MutableGraphHelper/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:

./MutableGraphHelper

WINDOWS USERS

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