GraphPoints

Other languages

See (Java)

Question

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Code¶

GraphPoints.cxx

#include <vtkGraphLayoutView.h>
#include <vtkMutableUndirectedGraph.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPoints.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>

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

  vtkNew<vtkMutableUndirectedGraph> g;

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

  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);

  g->SetPoints(points);

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

  vtkNew<vtkGraphLayoutView> graphLayoutView;
  graphLayoutView->AddRepresentationFromInput(g);
  graphLayoutView->SetLayoutStrategy("Pass Through");
  graphLayoutView->ResetCamera();
  graphLayoutView->GetRenderer()->GradientBackgroundOn();
  graphLayoutView->GetRenderer()->SetBackground2(
      colors->GetColor3d("RoyalBlue").GetData());
  graphLayoutView->GetRenderer()->SetBackground(
      colors->GetColor3d("MidnightBlue").GetData());

  graphLayoutView->GetRenderWindow()->SetWindowName("GraphPoints");
  graphLayoutView->Render();
  graphLayoutView->GetInteractor()->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt¶

cmake_minimum_required(VERSION 3.12 FATAL_ERROR)

project(GraphPoints)

find_package(VTK COMPONENTS 
)

if (NOT VTK_FOUND)
  message(FATAL_ERROR "GraphPoints: Unable to find the VTK build folder.")
endif()

# Prevent a "command line is too long" failure in Windows.
set(CMAKE_NINJA_FORCE_RESPONSE_FILE "ON" CACHE BOOL "Force Ninja to use response files.")
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}
)

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.