# ScalarBarActorColorSeries

VTKExamples/Cxx/Visualization/ScalarBarActorColorSeries

### Code

ScalarBarActorColorSeries.cxx

    #include <vtkActor.h>
    #include <vtkFloatArray.h>
    #include <vtkLookupTable.h>
    #include <vtkPointData.h>
    #include <vtkPolyData.h>
    #include <vtkPolyDataMapper.h>
    #include <vtkProperty.h>
    #include <vtkRenderer.h>
    #include <vtkRenderWindow.h>
    #include <vtkRenderWindowInteractor.h>
    #include <vtkScalarBarActor.h>
    #include <vtkSmartPointer.h>
    #include <vtkSphereSource.h>

    #include <vtkColorSeries.h>
    #include <vtkNamedColors.h>

    int main (int, char *[])
    {
      vtkSmartPointer<vtkNamedColors> colors =
        vtkSmartPointer<vtkNamedColors>::New();

      // Create a sphere fora some geometry
      vtkSmartPointer<vtkSphereSource> sphere =
        vtkSmartPointer<vtkSphereSource>::New();
      sphere->SetCenter(0,0,0);
      sphere->SetRadius(1);
      sphere->SetPhiResolution(30);
      sphere->SetThetaResolution(60);
      sphere->Update();

      // Create scalar data to associate with the vertices of the sphere
      int numPts = sphere->GetOutput()->GetPoints()->GetNumberOfPoints();
      vtkSmartPointer<vtkFloatArray> scalars =
        vtkSmartPointer<vtkFloatArray>::New();
      scalars->SetNumberOfValues( numPts );
      for( int i = 0; i < numPts; ++i )
      {
        scalars->SetValue(i,static_cast<float>(i)/numPts);
      }
      vtkSmartPointer<vtkPolyData> poly =
        vtkSmartPointer<vtkPolyData>::New();
      poly->DeepCopy(sphere->GetOutput());
      poly->GetPointData()->SetScalars(scalars);

      vtkSmartPointer<vtkPolyDataMapper> mapper =
        vtkSmartPointer<vtkPolyDataMapper>::New();
      mapper->SetInputData(poly);
      mapper->ScalarVisibilityOn();
      mapper->SetScalarModeToUsePointData();
      mapper->SetColorModeToMapScalars();

      vtkSmartPointer<vtkActor> actor =
        vtkSmartPointer<vtkActor>::New();
      actor->SetMapper(mapper);
      actor->GetProperty()->SetInterpolationToFlat();

      vtkSmartPointer<vtkScalarBarActor> scalarBar =
        vtkSmartPointer<vtkScalarBarActor>::New();
      scalarBar->SetLookupTable(mapper->GetLookupTable());
      scalarBar->SetTitle("Beachball");
      scalarBar->SetNumberOfLabels(4);

      // Create a lookup table to share between the mapper and the scalarbar
      vtkSmartPointer<vtkLookupTable> seriesLut =
        vtkSmartPointer<vtkLookupTable>::New();

      vtkSmartPointer<vtkColorSeries> series =
        vtkSmartPointer<vtkColorSeries>::New();
      int seriesEnum = series->BREWER_QUALITATIVE_SET3;
      series->SetColorScheme(seriesEnum);
      series->BuildLookupTable(seriesLut, series->ORDINAL);

      mapper->SetLookupTable(seriesLut);
      scalarBar->SetLookupTable(seriesLut);

      // Create a renderer and render window
      vtkSmartPointer<vtkRenderer> renderer =
        vtkSmartPointer<vtkRenderer>::New();

      renderer->GradientBackgroundOn();
      renderer->SetBackground2(colors->GetColor3d("NavajoWhite").GetData());
      renderer->SetBackground(colors->GetColor3d("Crimson").GetData());

      vtkSmartPointer<vtkRenderWindow> renderWindow =
        vtkSmartPointer<vtkRenderWindow>::New();
      renderWindow->AddRenderer(renderer);

      // Create an interactor
      vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
        vtkSmartPointer<vtkRenderWindowInteractor>::New();
      renderWindowInteractor->SetRenderWindow(renderWindow);

      // Add the actors to the scene
      renderer->AddActor(actor);
      renderer->AddActor2D(scalarBar);

      // Render the scene (lights and cameras are created automatically)
      renderWindow->Render();
      renderWindowInteractor->Start();

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(ScalarBarActorColorSeries)

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

    add_executable(ScalarBarActorColorSeries MACOSX_BUNDLE ScalarBarActorColorSeries.cxx )

    target_link_libraries(ScalarBarActorColorSeries ${VTK_LIBRARIES})

### Download and Build ScalarBarActorColorSeries

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

    cd ScalarBarActorColorSeries/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:

    ./ScalarBarActorColorSeries

WINDOWS USERS

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