# Dodecahedron

VTKExamples/Cxx/GeometricObjects/Dodecahedron

### Code

Dodecahedron.cxx

    #include <vtkSmartPointer.h>
    #include <vtkVersion.h>

    #include <vtkPolyhedron.h>
    #include <vtkPolyData.h>

    #include <vtkPolyDataMapper.h>
    #include <vtkCamera.h>
    #include <vtkActor.h>
    #include <vtkRenderWindow.h>
    #include <vtkRenderer.h>
    #include <vtkRenderWindowInteractor.h>

    vtkSmartPointer<vtkPolyhedron> MakeDodecahedron();

    int main (int, char *[])
    {
      vtkSmartPointer<vtkPolyhedron> dodecahedron = MakeDodecahedron();

      // Visualize
      vtkSmartPointer<vtkPolyDataMapper> mapper =
        vtkSmartPointer<vtkPolyDataMapper>::New();
    #if VTK_MAJOR_VERSION <= 5
      mapper->SetInput(dodecahedron->GetPolyData());
    #else
      mapper->SetInputData(dodecahedron->GetPolyData());
    #endif
      vtkSmartPointer<vtkActor> actor =
        vtkSmartPointer<vtkActor>::New();
      actor->SetMapper(mapper);

      vtkSmartPointer<vtkRenderer> renderer =
        vtkSmartPointer<vtkRenderer>::New();
      vtkSmartPointer<vtkRenderWindow> renderWindow =
        vtkSmartPointer<vtkRenderWindow>::New();
      renderWindow->AddRenderer(renderer);
      vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
        vtkSmartPointer<vtkRenderWindowInteractor>::New();
      renderWindowInteractor->SetRenderWindow(renderWindow);

      renderer->AddActor(actor);
      renderer->SetBackground(.2, .3, .4);
      renderer->GetActiveCamera()->Azimuth(30);
      renderer->GetActiveCamera()->Elevation(30);

      renderer->ResetCamera();

      renderWindow->Render();
      renderWindowInteractor->Start();

      return EXIT_SUCCESS;
    }

    vtkSmartPointer<vtkPolyhedron>MakeDodecahedron()
    {
      vtkSmartPointer<vtkPolyhedron> aDodecahedron =
        vtkSmartPointer<vtkPolyhedron>::New();

      for (int i = 0; i < 20; ++i)
      {
        aDodecahedron->GetPointIds()->InsertNextId(i);
      }

      aDodecahedron->GetPoints()->InsertNextPoint(1.21412,    0,          1.58931);
      aDodecahedron->GetPoints()->InsertNextPoint(0.375185,   1.1547,     1.58931);
      aDodecahedron->GetPoints()->InsertNextPoint(-0.982247,  0.713644,   1.58931);
      aDodecahedron->GetPoints()->InsertNextPoint(-0.982247,  -0.713644,  1.58931);
      aDodecahedron->GetPoints()->InsertNextPoint(0.375185,   -1.1547,    1.58931);
      aDodecahedron->GetPoints()->InsertNextPoint(1.96449,    0,          0.375185);
      aDodecahedron->GetPoints()->InsertNextPoint(0.607062,   1.86835,    0.375185);
      aDodecahedron->GetPoints()->InsertNextPoint(-1.58931,   1.1547,     0.375185);
      aDodecahedron->GetPoints()->InsertNextPoint(-1.58931,   -1.1547,    0.375185);
      aDodecahedron->GetPoints()->InsertNextPoint(0.607062,   -1.86835,   0.375185);
      aDodecahedron->GetPoints()->InsertNextPoint(1.58931,    1.1547,     -0.375185);
      aDodecahedron->GetPoints()->InsertNextPoint(-0.607062,  1.86835,    -0.375185);
      aDodecahedron->GetPoints()->InsertNextPoint(-1.96449,   0,          -0.375185);
      aDodecahedron->GetPoints()->InsertNextPoint(-0.607062,  -1.86835,   -0.375185);
      aDodecahedron->GetPoints()->InsertNextPoint(1.58931,    -1.1547,    -0.375185);
      aDodecahedron->GetPoints()->InsertNextPoint(0.982247,   0.713644,   -1.58931);
      aDodecahedron->GetPoints()->InsertNextPoint(-0.375185,  1.1547,     -1.58931);
      aDodecahedron->GetPoints()->InsertNextPoint(-1.21412,   0,          -1.58931);
      aDodecahedron->GetPoints()->InsertNextPoint(-0.375185,  -1.1547,    -1.58931);
      aDodecahedron->GetPoints()->InsertNextPoint(0.982247,   -0.713644,  -1.58931);

      vtkIdType faces[73] =
        {12,                   // number of faces
         5, 0, 1, 2, 3, 4,     // number of ids on face, ids
         5, 0, 5, 10, 6, 1,
         5, 1, 6, 11, 7, 2,
         5, 2, 7, 12, 8, 3,
         5, 3, 8, 13, 9, 4,
         5, 4, 9, 14, 5, 0,
         5, 15, 10, 5, 14, 19,
         5, 16, 11, 6, 10, 15,
         5, 17, 12, 7, 11, 16,
         5, 18, 13, 8, 12, 17,
         5, 19, 14, 9, 13, 18,
         5, 19, 18, 17, 16, 15};

      aDodecahedron->SetFaces(faces);
      aDodecahedron->Initialize();

      return aDodecahedron;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(Dodecahedron)

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

    add_executable(Dodecahedron MACOSX_BUNDLE Dodecahedron.cxx )

    target_link_libraries(Dodecahedron ${VTK_LIBRARIES})

### Download and Build Dodecahedron

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

    cd Dodecahedron/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:

    ./Dodecahedron

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