# PolyDataRIB

VTKExamples/Cxx/RenderMan/PolyDataRIB

### Description

To see the RenderMan results for this example, download and install the non-commercial version of RenderMan.

### Code

PolyDataRIB.cxx

    #include <vtkXMLPolyDataReader.h>
    #include <vtkSmartPointer.h>
    #include <vtkPolyDataMapper.h>
    #include <vtkPolyDataNormals.h>
    #include <vtkActor.h>
    #include <vtkRenderWindow.h>
    #include <vtkRenderer.h>
    #include <vtkRenderWindowInteractor.h>

    #include <vtkRIBExporter.h>
    #include <vtkRIBProperty.h>

    #include <vtksys/SystemTools.hxx>

    // static vtkSmartPointer<vtkRIBProperty> spatter(const char *sizes,
    //                                                const char *specksize,
    //                                                const char *spattercolor,
    //                                                const char *basecolor);
    static vtkSmartPointer<vtkRIBProperty> rmarble(const char *veining);

    int main ( int argc, char *argv[] )
    {
      // Parse command line arguments
      if(argc < 2)
      {
        std::cerr << "Usage: " << argv[0]
                  << " Filename(.vtp) [freqency]" << std::endl;
        return EXIT_FAILURE;
      }
      const char *freq = "1";
      if (argc > 2)
      {
        freq = argv[2];
      }

      std::string filename = argv[1];
      std::string prefix = vtksys::SystemTools::GetFilenameWithoutExtension(filename);

      // Read all the data from the file
      vtkSmartPointer<vtkXMLPolyDataReader> reader =
        vtkSmartPointer<vtkXMLPolyDataReader>::New();
      reader->SetFileName(filename.c_str());
      reader->Update();

      vtkSmartPointer<vtkPolyDataNormals> normals =
        vtkSmartPointer<vtkPolyDataNormals>::New();
      normals->SetInputConnection(reader->GetOutputPort());

      // Visualize
      vtkSmartPointer<vtkPolyDataMapper> mapper =
        vtkSmartPointer<vtkPolyDataMapper>::New();
      mapper->SetInputConnection(normals->GetOutputPort());

      vtkSmartPointer<vtkActor> actor =
        vtkSmartPointer<vtkActor>::New();
      actor->SetMapper(mapper);
      actor->SetProperty(rmarble(freq));

      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(.1, .3, .5); // Background color green

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

      prefix = prefix + "_" + freq;
      vtkSmartPointer<vtkRIBExporter> aRib =
        vtkSmartPointer<vtkRIBExporter>::New();
      aRib->BackgroundOn();
      aRib->SetInput(renderWindow);
      aRib->SetFilePrefix(prefix.c_str());
      aRib->Write();
      std::cout << "Exported RIB file is: " << prefix << ".rib" << std::endl;
      if (getenv("RMANTREE") == NULL)
      {
        std::cout << "To render the generated rib file, set the environment variable RMANTREE to the base of your RenderMan install" << std::endl;
      }
      else
      {
        std::string rmantree = getenv("RMANTREE");
        std::cout << "To create a tif file run: " << std::endl;
        std::cout << rmantree << "bin/prman " << prefix << ".rib " << std::endl;
      }
      return EXIT_SUCCESS;
    }

    // vtkSmartPointer<vtkRIBProperty> spatter(const char *sizes,
    //                                         const char *specksize,
    //                                         const char *spattercolor,
    //                                         const char *basecolor)
    // {
    //   vtkSmartPointer<vtkRIBProperty> spatterProp =
    //     vtkSmartPointer<vtkRIBProperty>::New ();
    //   spatterProp->SetVariable("sizes", "float");
    //   spatterProp->AddVariable("specksize", "float");
    //   spatterProp->AddVariable("spattercolor", "color");
    //   spatterProp->AddVariable("basecolor", "color");

    //   spatterProp->SetSurfaceShaderParameter("sizes", sizes);
    //   spatterProp->AddSurfaceShaderParameter("specksize", specksize);
    //   spatterProp->AddSurfaceShaderParameter("spattercolor", spattercolor);
    //   spatterProp->AddSurfaceShaderParameter("basecolor", basecolor);
    //   spatterProp->SetSurfaceShader("spatter");

    //   return spatterProp;
    // }

    vtkSmartPointer<vtkRIBProperty> rmarble(const char *veining)
    {
      vtkSmartPointer<vtkRIBProperty> rmarbleProp =
        vtkSmartPointer<vtkRIBProperty>::New ();
      rmarbleProp->SetVariable("veining", "float");
      rmarbleProp->SetSurfaceShaderParameter("veining", veining);
      rmarbleProp->SetSurfaceShader("rmarble");

      return rmarbleProp;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(PolyDataRIB)

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

    add_executable(PolyDataRIB MACOSX_BUNDLE PolyDataRIB.cxx )

    target_link_libraries(PolyDataRIB ${VTK_LIBRARIES})

### Download and Build PolyDataRIB

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

    cd PolyDataRIB/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:

    ./PolyDataRIB

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.