GraphPoints

VTKExamples/Cxx/InfoVis/GraphPoints


Other Languages

See (Java)

Code

GraphPoints.cxx

#include <vtkMutableUndirectedGraph.h>
#include <vtkPoints.h>
#include <vtkSmartPointer.h>
#include <vtkGraphLayoutView.h>
#include <vtkRenderWindowInteractor.h>

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

  // Create 3 vertices
  vtkIdType v1 = g->AddVertex();
  vtkIdType v2 = g->AddVertex();
  vtkIdType v3 = g->AddVertex();
  g->AddEdge(v1, v2);
  g->AddEdge(v1, v3);

  vtkSmartPointer<vtkPoints> points =
    vtkSmartPointer<vtkPoints>::New();
  points->InsertNextPoint(0.0, 0.0, 0.0);
  points->InsertNextPoint(1.0, 0.0, 0.0);
  points->InsertNextPoint(0.0, 1.0, 0.0);

  g->SetPoints(points);

  std::cout << "Number of output points: " << g->GetPoints()->GetNumberOfPoints() << std::endl;

  vtkSmartPointer<vtkGraphLayoutView> graphLayoutView =
    vtkSmartPointer<vtkGraphLayoutView>::New();
  graphLayoutView->AddRepresentationFromInput(g);
  graphLayoutView->SetLayoutStrategy("Pass Through");
  graphLayoutView->ResetCamera();
  graphLayoutView->Render();
  graphLayoutView->GetInteractor()->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(GraphPoints)

find_package(VTK COMPONENTS 
  vtkCommonCore
  vtkCommonDataModel
  vtkInteractionStyle
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingOpenGL2
  vtkViewsInfovis QUIET)
if (NOT VTK_FOUND)
  message("Skipping GraphPoints: ${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(GraphPoints MACOSX_BUNDLE GraphPoints.cxx )
  target_link_libraries(GraphPoints PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(GraphPoints MACOSX_BUNDLE GraphPoints.cxx )
  target_link_libraries(GraphPoints PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS GraphPoints
    MODULES ${VTK_LIBRARIES}
    )
endif () 

Download and Build GraphPoints

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

cd GraphPoints/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:

./GraphPoints

WINDOWS USERS

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