# OrientationMarkerWidget

VTKExamples/Cxx/Widgets/OrientationMarkerWidget

### Description

This example uses a polydata as an orientation icon. You can get the bunny data here.

### Code

OrientationMarkerWidget.cxx

    #include <vtkSmartPointer.h>
    #include <vtkOrientationMarkerWidget.h>

    #include <vtkXMLPolyDataReader.h>
    #include <vtkSuperquadricSource.h>
    #include <vtkRenderer.h>
    #include <vtkRenderWindow.h>
    #include <vtkRenderWindowInteractor.h>
    #include <vtkDataSetMapper.h>
    #include <vtkProperty.h>
    #include <vtkActor.h>
    #include <vtkPolyDataMapper.h>
    #include <vtkNamedColors.h>

    int main (int argc, char *argv[] )
    {
      // Parse command line arguments
      if(argc != 2)
      {
        std::cerr << "Usage: " << argv[0]
                  << " Filename(.vtp)" << std::endl;
        return EXIT_FAILURE;
      }

      vtkSmartPointer<vtkNamedColors> colors =
        vtkSmartPointer<vtkNamedColors>::New();

      // Read the polydata for the icon
      vtkSmartPointer<vtkXMLPolyDataReader> reader =
        vtkSmartPointer<vtkXMLPolyDataReader>::New();
      reader->SetFileName(argv[1]);

      vtkSmartPointer<vtkDataSetMapper> iconMapper =
        vtkSmartPointer<vtkDataSetMapper>::New();
      iconMapper->SetInputConnection(reader->GetOutputPort());

      vtkSmartPointer<vtkActor> iconActor =
        vtkSmartPointer<vtkActor>::New();
      iconActor->SetMapper(iconMapper);
      iconActor->GetProperty()->SetColor(colors->GetColor3d("Silver").GetData());

      // Set up the renderer, window, and interactor
      vtkSmartPointer<vtkRenderer> renderer =
        vtkSmartPointer<vtkRenderer>::New();
      renderer->SetBackground(colors->GetColor3d("SlateGray").GetData());

      vtkSmartPointer<vtkRenderWindow> renWin =
        vtkSmartPointer<vtkRenderWindow>::New();
      renWin->AddRenderer( renderer );
      renWin->SetSize( 400, 400 );

      vtkSmartPointer<vtkRenderWindowInteractor> iren =
        vtkSmartPointer<vtkRenderWindowInteractor>::New();
      iren->SetRenderWindow( renWin );

      // Set up the widget
      vtkSmartPointer<vtkOrientationMarkerWidget> widget =
        vtkSmartPointer<vtkOrientationMarkerWidget>::New();
      widget->SetOrientationMarker( iconActor );
      widget->SetInteractor( iren );
      widget->SetViewport( 0.0, 0.0, 0.2, 0.2 );
      widget->SetOutlineColor(colors->GetColor3d("Wheat").GetRed(),
                              colors->GetColor3d("Wheat").GetGreen(),
                              colors->GetColor3d("Wheat").GetBlue());
      widget->SetEnabled( 1 );
      widget->InteractiveOn();

      // Create a superquadric
      vtkSmartPointer<vtkSuperquadricSource> superquadricSource =
        vtkSmartPointer<vtkSuperquadricSource>::New();
      superquadricSource->SetPhiRoundness(.2);
      superquadricSource->SetThetaRoundness(.8);

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

      vtkSmartPointer<vtkActor> superquadricActor =
        vtkSmartPointer<vtkActor>::New();
      superquadricActor->SetMapper(superquadricMapper);
      superquadricActor->GetProperty()->SetInterpolationToFlat();
      superquadricActor->GetProperty()->SetDiffuseColor(colors->GetColor3d("Carrot").GetData());
      superquadricActor->GetProperty()->SetSpecularColor(1.0, 1.0, 1.0);
      superquadricActor->GetProperty()->SetDiffuse(.6);
      superquadricActor->GetProperty()->SetSpecular(.5);
      superquadricActor->GetProperty()->SetSpecularPower(5.0);

      renderer->AddActor(superquadricActor);
      renderer->ResetCamera();

      renWin->Render();

      iren->Initialize();

      iren->Start();

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(OrientationMarkerWidget)

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

    add_executable(OrientationMarkerWidget MACOSX_BUNDLE OrientationMarkerWidget.cxx )

    target_link_libraries(OrientationMarkerWidget ${VTK_LIBRARIES})

### Download and Build OrientationMarkerWidget

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

    cd OrientationMarkerWidget/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:

    ./OrientationMarkerWidget

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.