# ReadPLY

VTKExamples/Cxx/IO/ReadPLY

### Code

ReadPLY.cxx

    #include <vtkPolyData.h>
    #include <vtkPLYReader.h>
    #include <vtkSmartPointer.h>
    #include <vtkPolyDataMapper.h>
    #include <vtkActor.h>
    #include <vtkRenderWindow.h>
    #include <vtkRenderer.h>
    #include <vtkRenderWindowInteractor.h>

    int main ( int argc, char *argv[] )
    {
      if(argc != 2)
      {
        std::cout << "Usage: " << argv[0] << "  Filename(.ply)" << std::endl;
        return EXIT_FAILURE;
      }

      std::string inputFilename = argv[1];

      vtkSmartPointer<vtkPLYReader> reader =
        vtkSmartPointer<vtkPLYReader>::New();
      reader->SetFileName ( inputFilename.c_str() );

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

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

      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(0.1804,0.5451,0.3412); // Sea green

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

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(ReadPLY)

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

    add_executable(ReadPLY MACOSX_BUNDLE ReadPLY.cxx )

    target_link_libraries(ReadPLY ${VTK_LIBRARIES})

### Download and Build ReadPLY

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

    cd ReadPLY/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:

    ./ReadPLY

WINDOWS USERS

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