BoostBreadthFirstSearchTree

VTKExamples/Cxx/Graphs/BoostBreadthFirstSearchTree


Code

BoostBreadthFirstSearchTree.cxx

#include <vtkSmartPointer.h>

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

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

  // 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);

  vtkSmartPointer<vtkBoostBreadthFirstSearchTree> bfsTree = 
    vtkSmartPointer<vtkBoostBreadthFirstSearchTree>::New();
  bfsTree->SetOriginVertex(v5);
  bfsTree->SetInput(g);
  bfsTree->Update();

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

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

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(BoostBreadthFirstSearchTree)

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

add_executable(BoostBreadthFirstSearchTree MACOSX_BUNDLE BoostBreadthFirstSearchTree.cxx )

target_link_libraries(BoostBreadthFirstSearchTree ${VTK_LIBRARIES})

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.