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SideBySideGraphs

vtk-examples/Cxx/Graphs/SideBySideGraphs


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See (Python)

Question

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Code

SideBySideGraphs.cxx

#include <vtkDataSetAttributes.h>
#include <vtkForceDirectedLayoutStrategy.h>
#include <vtkGraphLayoutView.h>
#include <vtkGraphToPolyData.h>
#include <vtkMutableUndirectedGraph.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>

int main(int, char*[])
{
  vtkNew<vtkNamedColors> colors;

  // Create the first graph
  vtkNew<vtkMutableUndirectedGraph> g0;
  {
    vtkIdType v1 = g0->AddVertex();
    vtkIdType v2 = g0->AddVertex();
    vtkIdType v3 = g0->AddVertex();

    g0->AddEdge(v1, v2);
    g0->AddEdge(v2, v3);
    g0->AddEdge(v1, v3);

    // Create points
    vtkNew<vtkPoints> points;
    points->InsertNextPoint(0.0, 0.0, 0.0);
    points->InsertNextPoint(1.0, 0.0, 0.0);
    points->InsertNextPoint(0.0, 1.0, 0.0);

    // Add the coordinates of the points to the graph
    g0->SetPoints(points);
  }

  // Create the second graph
  vtkNew<vtkMutableUndirectedGraph> g1;

  vtkIdType v1 = g1->AddVertex();
  vtkIdType v2 = g1->AddVertex();

  g1->AddEdge(v1, v2);

  // Create points
  vtkNew<vtkPoints> points;
  points->InsertNextPoint(0.0, 0.0, 0.0);
  points->InsertNextPoint(1.0, 0.0, 0.0);

  // Add the coordinates of the points to the graph
  g1->SetPoints(points);

  // There will be one render window
  vtkNew<vtkRenderWindow> renderWindow;
  renderWindow->SetSize(600, 300);
  renderWindow->SetWindowName("SideBySideGraphs");

  vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;

  // Define viewport ranges
  // (xmin, ymin, xmax, ymax)
  double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
  double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};

  vtkNew<vtkForceDirectedLayoutStrategy> forceDirected;

  vtkNew<vtkGraphLayoutView> graphLayoutView0;
  // If we create a layout object directly, just set the pointer to this method.
  // graphLayoutView0->SetLayoutStrategy(forceDirected);
  graphLayoutView0->SetLayoutStrategyToForceDirected();
  graphLayoutView0->SetRenderWindow(renderWindow);
  graphLayoutView0->SetInteractor(renderWindowInteractor);
  graphLayoutView0->GetRenderer()->SetViewport(leftViewport);
  graphLayoutView0->AddRepresentationFromInput(g0);
  graphLayoutView0->GetRenderer()->SetBackground(
      colors->GetColor3d("Navy").GetData());
  graphLayoutView0->GetRenderer()->SetBackground2(
      colors->GetColor3d("MidnightBlue").GetData());
  graphLayoutView0->Render();
  graphLayoutView0->ResetCamera();

  vtkNew<vtkGraphLayoutView> graphLayoutView1;
  // If we create a layout object directly, just set the pointer to this method.
  // graphLayoutView1->SetLayoutStrategy(forceDirected);
  graphLayoutView1->SetLayoutStrategyToForceDirected();
  graphLayoutView1->SetRenderWindow(renderWindow);
  graphLayoutView1->SetInteractor(renderWindowInteractor);
  graphLayoutView1->GetRenderer()->SetViewport(rightViewport);
  graphLayoutView1->AddRepresentationFromInput(g1);
  graphLayoutView1->GetRenderer()->SetBackground(
      colors->GetColor3d("DarkGreen").GetData());
  graphLayoutView1->GetRenderer()->SetBackground2(
      colors->GetColor3d("ForestGreen").GetData());
  graphLayoutView1->Render();
  graphLayoutView1->ResetCamera();

  // graphLayoutView0->GetInteractor()->Start();
  renderWindowInteractor->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(SideBySideGraphs)

find_package(VTK COMPONENTS 
  vtkCommonColor
  vtkCommonCore
  vtkCommonDataModel
  vtkFiltersSources
  vtkInfovisLayout
  vtkInteractionStyle
  vtkRenderingContextOpenGL2
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingGL2PSOpenGL2
  vtkRenderingOpenGL2
  vtkViewsInfovis
  QUIET
)

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

Download and Build SideBySideGraphs

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

cd SideBySideGraphs/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:

./SideBySideGraphs

WINDOWS USERS

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