# OpenVRTessellatedBoxSource

VTKExamples/Cxx/GeometricObjects/OpenVRTessellatedBoxSource

VTK + OpenVR TessellatedBoxSource example.

### Code

OpenVRTessellatedBoxSource.cxx

    #include <vtkActor.h>
    #include <vtkCamera.h>
    #include <vtkDataSetMapper.h>
    #include <vtkNamedColors.h>
    #include <vtkProperty.h>
    #include <vtkOpenVRRenderWindow.h>
    #include <vtkOpenVRRenderer.h>
    #include <vtkOpenVRRenderWindowInteractor.h>
    #include <vtkShrinkFilter.h>
    #include <vtkSmartPointer.h>
    #include <vtkTessellatedBoxSource.h>

    int main(int /* argc */, char * /* argv */[])
    {
      double bounds[6];
      bounds[0] = -10.0; bounds[1] = 10.0;
      bounds[2] = 10.0; bounds[3] = 20.0;
      bounds[4] = -5.0; bounds[5] = 5.0;

      vtkSmartPointer<vtkTessellatedBoxSource> boxSource =
        vtkSmartPointer<vtkTessellatedBoxSource>::New();
      boxSource->SetLevel(3);
      boxSource->QuadsOn();
      boxSource->SetBounds(bounds);
      boxSource->SetOutputPointsPrecision(vtkAlgorithm::SINGLE_PRECISION);

      vtkSmartPointer<vtkShrinkFilter> shrink =
        vtkSmartPointer<vtkShrinkFilter>::New();
      shrink->SetInputConnection(boxSource->GetOutputPort());
      shrink->SetShrinkFactor(.8);

      //Create a mapper and actor
      vtkSmartPointer<vtkNamedColors> colors =
        vtkSmartPointer<vtkNamedColors>::New();

      vtkSmartPointer<vtkDataSetMapper> mapper =
        vtkSmartPointer<vtkDataSetMapper>::New();
      mapper->SetInputConnection(shrink->GetOutputPort());

      vtkSmartPointer<vtkProperty> back =
        vtkSmartPointer<vtkProperty>::New();
      back->SetColor(colors->GetColor3d("Tomato").GetData());

      vtkSmartPointer<vtkActor> actor =
        vtkSmartPointer<vtkActor>::New();
      actor->SetMapper(mapper);
      actor->GetProperty()->EdgeVisibilityOn();
      actor->GetProperty()->SetColor(colors->GetColor3d("Banana").GetData());
      actor->SetBackfaceProperty(back);

      //Create a renderer, render window, and interactor
      vtkSmartPointer<vtkOpenVRRenderer> renderer =
        vtkSmartPointer<vtkOpenVRRenderer>::New();
      vtkSmartPointer<vtkOpenVRRenderWindow> renderWindow =
        vtkSmartPointer<vtkOpenVRRenderWindow>::New();
      renderWindow->AddRenderer(renderer);
      vtkSmartPointer<vtkOpenVRRenderWindowInteractor> renderWindowInteractor =
        vtkSmartPointer<vtkOpenVRRenderWindowInteractor>::New();
      renderWindowInteractor->SetRenderWindow(renderWindow);

      //Add the actors to the scene
      renderer->AddActor(actor);
      renderer->SetBackground(colors->GetColor3d("Silver").GetData());

      renderer->ResetCamera();
      renderer->GetActiveCamera()->Azimuth(30);
      renderer->GetActiveCamera()->Elevation(30);
      renderer->ResetCameraClippingRange();

      //Render and interact
      renderWindow->SetSize(640, 480);
      renderWindow->Render();
      renderWindowInteractor->Start();

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

    project(OpenVRTessellatedBoxSource)

    find_package(VTK COMPONENTS
      vtkCommonColor
      vtkCommonCore
      vtkFiltersGeneral
      vtkFiltersSources
      vtkInteractionStyle
      vtkRenderingCore
      vtkRenderingFreeType
      vtkRenderingOpenGL2
      vtkRenderingOpenVR QUIET)
    if (NOT VTK_FOUND)
      message("Skipping OpenVRTessellatedBoxSource: ${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(OpenVRTessellatedBoxSource MACOSX_BUNDLE OpenVRTessellatedBoxSource.cxx )
      target_link_libraries(OpenVRTessellatedBoxSource PRIVATE ${VTK_LIBRARIES})
    else ()
      # include all components
      add_executable(OpenVRTessellatedBoxSource MACOSX_BUNDLE OpenVRTessellatedBoxSource.cxx )
      target_link_libraries(OpenVRTessellatedBoxSource PRIVATE ${VTK_LIBRARIES})
      # vtk_module_autoinit is needed
      vtk_module_autoinit(
        TARGETS OpenVRTessellatedBoxSource
        MODULES ${VTK_LIBRARIES}
        )
    endif ()

### Download and Build OpenVRTessellatedBoxSource

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

    cd OpenVRTessellatedBoxSource/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:

    ./OpenVRTessellatedBoxSource

WINDOWS USERS

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