# Reflection

VTKExamples/Cxx/PolyData/Reflection

### Description

Note

This example uses vtkReflectionFilter, which outputs a vtkDataObject. For an example that returns a vtkPolyData, see TransformPolyData.

### Code

Reflection.cxx

    #include <vtkSmartPointer.h>
    #include <vtkReflectionFilter.h>

    #include <vtkDataSetMapper.h>
    #include <vtkProperty.h>
    #include <vtkPolyData.h>
    #include <vtkConeSource.h>
    #include <vtkPolyDataMapper.h>
    #include <vtkActor.h>
    #include <vtkRenderWindow.h>
    #include <vtkRenderer.h>
    #include <vtkRenderWindowInteractor.h>
    #include <vtkNamedColors.h>

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

      vtkSmartPointer<vtkConeSource> coneSource =
        vtkSmartPointer<vtkConeSource>::New();
      coneSource->Update();

      vtkSmartPointer<vtkPolyDataMapper> coneMapper =
        vtkSmartPointer<vtkPolyDataMapper>::New();
      coneMapper->SetInputConnection(coneSource->GetOutputPort());
      vtkSmartPointer<vtkActor> coneActor =
          vtkSmartPointer<vtkActor>::New();
      coneActor->SetMapper(coneMapper);
      coneActor->GetProperty()->SetColor(colors->GetColor3d("Mint").GetData());

      // Reflection
      vtkSmartPointer<vtkReflectionFilter> reflectionFilter =
        vtkSmartPointer<vtkReflectionFilter>::New();
      reflectionFilter->SetInputConnection(coneSource->GetOutputPort());
      reflectionFilter->CopyInputOff();
      reflectionFilter->Update();

      vtkSmartPointer<vtkDataSetMapper> reflectionMapper =
        vtkSmartPointer<vtkDataSetMapper>::New();
      reflectionMapper->SetInputConnection(reflectionFilter->GetOutputPort());
      vtkSmartPointer<vtkActor> reflectionActor =
        vtkSmartPointer<vtkActor>::New();
      reflectionActor->SetMapper(reflectionMapper);
      reflectionActor->GetProperty()->SetColor(colors->GetColor3d("Tomato").GetData());

      // Create a renderer, render window, and interactor
      vtkSmartPointer<vtkRenderer> renderer =
        vtkSmartPointer<vtkRenderer>::New();
      vtkSmartPointer<vtkRenderWindow> renderWindow =
        vtkSmartPointer<vtkRenderWindow>::New();
      renderWindow->SetSize(640, 480);
      renderWindow->AddRenderer(renderer);

      vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
        vtkSmartPointer<vtkRenderWindowInteractor>::New();
      renderWindowInteractor->SetRenderWindow(renderWindow);

      // Add the actor to the scene
      renderer->AddActor(coneActor);
      renderer->AddActor(reflectionActor);
      renderer->SetBackground(colors->GetColor3d("Burlywood").GetData());

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

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(Reflection)

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

    add_executable(Reflection MACOSX_BUNDLE Reflection.cxx )

    target_link_libraries(Reflection ${VTK_LIBRARIES})

### Download and Build Reflection

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

    cd Reflection/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:

    ./Reflection

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.