VTK/Examples/Cxx/Graphs/ConstructGraph

This example shows how to construct a simple graph.

ConstructGraph.cxx

#include <vtkSmartPointer.h>
#include <vtkMutableUndirectedGraph.h>
#include <vtkCircularLayoutStrategy.h>
#include <vtkDataSetAttributes.h>
#include <vtkDoubleArray.h>
#include <vtkGraphLayoutView.h>
#include <vtkIntArray.h>
#include <vtkMutableUndirectedGraph.h>
#include <vtkRenderWindowInteractor.h>

int main(int, char *[])
{
  vtkSmartPointer<vtkMutableUndirectedGraph> g = 
    vtkSmartPointer<vtkMutableUndirectedGraph>::New();
 
  vtkIdType v1 = g->AddVertex();
  vtkIdType v2 = g->AddVertex();
 
  g->AddEdge ( v1, v2 );
 
  std::cout << "Number of vertices: "
            << g->GetNumberOfVertices() << std::endl;
  std::cout << "Number of edges: "
            << g->GetNumberOfEdges() << std::endl;
 
  g->AddEdge ( v1, v2 );
 
  std::cout << "Number of vertices: "
            << g->GetNumberOfVertices() << std::endl;
  std::cout << "Number of edges: "
            << g->GetNumberOfEdges() << std::endl;
 
  vtkSmartPointer<vtkGraphLayoutView> graphLayoutView = 
    vtkSmartPointer<vtkGraphLayoutView>::New();
  graphLayoutView->AddRepresentationFromInput(g);
  graphLayoutView->ResetCamera();
  graphLayoutView->Render();
  graphLayoutView->GetInteractor()->Start();
  
  return EXIT_SUCCESS;
}

Please try the new VTKExamples website.

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(ConstructGraph)

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

add_executable(ConstructGraph MACOSX_BUNDLE ConstructGraph.cxx)

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

Download and Build ConstructGraph

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

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

cd ConstructGraph/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:

./ConstructGraph

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.