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MutableGraphHelper

vtk-examples/Cxx/InfoVis/MutableGraphHelper

Question

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Code

MutableGraphHelper.cxx

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

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

  vtkNew<vtkMutableGraphHelper> graphHelper;
  graphHelper->SetGraph(g);
  vtkIdType v0 = graphHelper->AddVertex();
  vtkIdType v1 = graphHelper->AddVertex();

  graphHelper->AddEdge(v0, v1);

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

  vtkNew<vtkGraphLayoutView> treeLayoutView;
  treeLayoutView->AddRepresentationFromInput(graphHelper->GetGraph());
  treeLayoutView->SetLayoutStrategyToTree();
  treeLayoutView->ResetCamera();
  treeLayoutView->Render();
  treeLayoutView->GetInteractor()->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.12 FATAL_ERROR)

project(MutableGraphHelper)

find_package(VTK COMPONENTS 
  vtkCommonCore
  vtkCommonDataModel
  vtkInfovisCore
  vtkInteractionStyle
  vtkRenderingContextOpenGL2
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingGL2PSOpenGL2
  vtkRenderingOpenGL2
  vtkViewsInfovis
  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()
  # 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(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.