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# VertexGlyphFilter

VTKEx/Cxx/Filtering/VertexGlyphFilter

### Description

This example creates a set of points and adds a vertex at each point using vtkVertexGlyphFilter.

Other languages

See (Python), (Java)

Question

If you have a simple question about this example contact us at VTKExProject If your question is more complex and may require extended discussion, please use the VTK Discourse Forum

### Code

VertexGlyphFilter.cxx

    #include <vtkActor.h>
    #include <vtkNamedColors.h>
    #include <vtkPolyData.h>
    #include <vtkPolyDataMapper.h>
    #include <vtkProperty.h>
    #include <vtkRenderWindow.h>
    #include <vtkRenderWindowInteractor.h>
    #include <vtkRenderer.h>
    #include <vtkSmartPointer.h>
    #include <vtkVertexGlyphFilter.h>

    int main(int, char*[])
    {
      auto namedColors = vtkSmartPointer<vtkNamedColors>::New();
      namedColors->SetColor("Bkg", 0.3, 0.6, 0.3);

      auto points = vtkSmartPointer<vtkPoints>::New();
      points->InsertNextPoint(0, 0, 0);
      points->InsertNextPoint(1, 1, 1);
      points->InsertNextPoint(2, 2, 2);

      auto polydata = vtkSmartPointer<vtkPolyData>::New();
      polydata->SetPoints(points);

      auto vertexGlyphFilter = vtkSmartPointer<vtkVertexGlyphFilter>::New();
      vertexGlyphFilter->AddInputData(polydata);
      vertexGlyphFilter->Update();

      // Create a mapper and actor
      auto mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
      mapper->SetInputConnection(vertexGlyphFilter->GetOutputPort());

      auto actor = vtkSmartPointer<vtkActor>::New();
      actor->SetMapper(mapper);
      actor->GetProperty()->SetPointSize(3);

      // Create a renderer, render window, and interactor
      auto renderer = vtkSmartPointer<vtkRenderer>::New();
      auto renderWindow = vtkSmartPointer<vtkRenderWindow>::New();
      renderWindow->AddRenderer(renderer);
      auto renderWindowInteractor =
          vtkSmartPointer<vtkRenderWindowInteractor>::New();
      renderWindowInteractor->SetRenderWindow(renderWindow);

      // Add the actor to the scene
      renderer->AddActor(actor);
      renderer->SetBackground(
          namedColors->GetColor3d("Bkg").GetData()); // Background color green

      // Render and interact
      renderWindow->Render();
      renderWindowInteractor->Start();

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

    project(VertexGlyphFilter)

    find_package(VTK COMPONENTS
      vtkvtkCommonColor
      vtkvtkCommonCore
      vtkvtkCommonDataModel
      vtkvtkFiltersGeneral
      vtkvtkInteractionStyle
      vtkvtkRenderingContextOpenGL2
      vtkvtkRenderingCore
      vtkvtkRenderingFreeType
      vtkvtkRenderingGL2PSOpenGL2
      vtkvtkRenderingOpenGL2 QUIET)
    if (NOT VTK_FOUND)
      message("Skipping VertexGlyphFilter: ${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(VertexGlyphFilter MACOSX_BUNDLE VertexGlyphFilter.cxx )
      target_link_libraries(VertexGlyphFilter PRIVATE ${VTK_LIBRARIES})
    else ()
      # include all components
      add_executable(VertexGlyphFilter MACOSX_BUNDLE VertexGlyphFilter.cxx )
      target_link_libraries(VertexGlyphFilter PRIVATE ${VTK_LIBRARIES})
      # vtk_module_autoinit is needed
      vtk_module_autoinit(
        TARGETS VertexGlyphFilter
        MODULES ${VTK_LIBRARIES}
        )
    endif ()

### Download and Build VertexGlyphFilter

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

    cd VertexGlyphFilter/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:

    ./VertexGlyphFilter

WINDOWS USERS

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