VisualizeGraph

VTKExamples/Cxx/Graphs/VisualizeGraph


Description

This example shows how to construct a graph and visualize it. You can select edges and vertices with the mouse.

Code

VisualizeGraph.cxx

#include <vtkSmartPointer.h>

#include <vtkGraphLayoutStrategy.h>
#include <vtkGraphLayoutView.h>
#include <vtkGraphWriter.h>
#include <vtkMutableUndirectedGraph.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSimple2DLayoutStrategy.h>

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

  vtkIdType v1 = g->AddVertex();
  vtkIdType v2 = g->AddVertex();

  g->AddEdge(v1, v2);
  g->AddEdge(v1, v2);

  vtkSmartPointer<vtkGraphLayoutView> graphLayoutView = 
    vtkSmartPointer<vtkGraphLayoutView>::New();
  graphLayoutView->AddRepresentationFromInput(g);
  graphLayoutView->SetLayoutStrategy("Simple 2D");
  graphLayoutView->ResetCamera();
  graphLayoutView->Render();

  vtkSimple2DLayoutStrategy::SafeDownCast(graphLayoutView->GetLayoutStrategy())->SetRandomSeed(0);
  graphLayoutView->GetInteractor()->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(VisualizeGraph)

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

add_executable(VisualizeGraph MACOSX_BUNDLE VisualizeGraph.cxx )

target_link_libraries(VisualizeGraph ${VTK_LIBRARIES})

Download and Build VisualizeGraph

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

cd VisualizeGraph/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:

./VisualizeGraph

WINDOWS USERS

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