# Hull

VTKExamples/Cxx/PolyData/Hull

### Code

Hull.cxx

    #include <vtkPoints.h>
    #include <vtkXMLPolyDataReader.h>
    #include <vtkXMLPolyDataWriter.h>
    #include <vtkSmartPointer.h>
    #include <vtkHull.h>

    int main(int argc, char *argv[])
    {
      // Parse command line arguments
      if(argc != 2)
      {
        std::cout << "Required arguments: Filename" << std::endl;
        return EXIT_FAILURE;
      }

      vtkSmartPointer<vtkXMLPolyDataReader> reader =
        vtkSmartPointer<vtkXMLPolyDataReader>::New();
      reader->SetFileName(argv[1]);
      reader->Update();

      vtkSmartPointer<vtkHull> hullFilter =
        vtkSmartPointer<vtkHull>::New();
      hullFilter->SetInputConnection(reader->GetOutputPort());
      hullFilter->AddCubeFacePlanes ();
      hullFilter->Update();

      vtkSmartPointer<vtkXMLPolyDataWriter> writer =
        vtkSmartPointer<vtkXMLPolyDataWriter>::New();
      writer->SetInputConnection(hullFilter->GetOutputPort());
      writer->SetFileName("hull.vtp");
      writer->Write();

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(Hull)

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

    add_executable(Hull MACOSX_BUNDLE Hull.cxx)

    target_link_libraries(Hull ${VTK_LIBRARIES})

### Download and Build Hull

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

    cd Hull/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:

    ./Hull

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.