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BoostBreadthFirstSearchTree

vtk-examples/Cxx/Graphs/BoostBreadthFirstSearchTree


Question

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Code

BoostBreadthFirstSearchTree.cxx

#include <vtkBoostBreadthFirstSearchTree.h>
#include <vtkDataSetAttributes.h>
#include <vtkDoubleArray.h>
#include <vtkGraphLayoutView.h>
#include <vtkIntArray.h>
#include <vtkMutableUndirectedGraph.h>
#include <vtkNew.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkTree.h>

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

  // Create 5 vertices
  vtkIdType v1 = g->AddVertex();
  vtkIdType v2 = g->AddVertex();
  vtkIdType v3 = g->AddVertex();
  vtkIdType v4 = g->AddVertex();
  vtkIdType v5 = g->AddVertex();

  // Create a graph
  g->AddEdge(v1, v2);
  g->AddEdge(v1, v3);
  g->AddEdge(v2, v4);
  g->AddEdge(v4, v5);

  vtkNew<vtkBoostBreadthFirstSearchTree> bfsTree;
  bfsTree->SetOriginVertex(v5);
  bfsTree->SetInput(g);
  bfsTree->Update();

  {
    // Original graph
    vtkNew<vtkGraphLayoutView> graphLayoutView;
    graphLayoutView->AddRepresentationFromInput(g);
    graphLayoutView->SetLayoutStrategyToTree();
    graphLayoutView->ResetCamera();
    graphLayoutView->Render();
    graphLayoutView->GetInteractor()->Start();
  }

  {
    // BFS tree
    vtkNew<vtkGraphLayoutView> graphLayoutView;
    graphLayoutView->SetLayoutStrategyToTree();
    graphLayoutView->AddRepresentationFromInput(bfsTree->GetOutput());
    graphLayoutView->ResetCamera();
    graphLayoutView->Render();
    graphLayoutView->GetInteractor()->Start();
  }

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(BoostBreadthFirstSearchTree)

find_package(VTK COMPONENTS 
  vtkCommonCore
  vtkCommonDataModel
  vtkInfovisBoostGraphAlgorithms
  vtkInteractionStyle
  vtkRenderingContextOpenGL2
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingGL2PSOpenGL2
  vtkRenderingOpenGL2
  vtkViewsInfovis
  QUIET
)

if (NOT VTK_FOUND)
  message("Skipping BoostBreadthFirstSearchTree: ${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(BoostBreadthFirstSearchTree MACOSX_BUNDLE BoostBreadthFirstSearchTree.cxx )
  target_link_libraries(BoostBreadthFirstSearchTree PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(BoostBreadthFirstSearchTree MACOSX_BUNDLE BoostBreadthFirstSearchTree.cxx )
  target_link_libraries(BoostBreadthFirstSearchTree PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS BoostBreadthFirstSearchTree
    MODULES ${VTK_LIBRARIES}
    )
endif ()

Download and Build BoostBreadthFirstSearchTree

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

cd BoostBreadthFirstSearchTree/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:

./BoostBreadthFirstSearchTree

WINDOWS USERS

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