# ClosedSurface

VTKExamples/Cxx/PolyData/ClosedSurface

### Code

ClosedSurface.cxx

    #include <vtkSmartPointer.h>
    #include <vtkSphereSource.h>
    #include <vtkFeatureEdges.h>

    int main(int, char *[])
    {
      // Create a sphere
      vtkSmartPointer<vtkSphereSource> sphereSource =
        vtkSmartPointer<vtkSphereSource>::New();
      sphereSource->Update();

      vtkSmartPointer<vtkFeatureEdges> featureEdges =
        vtkSmartPointer<vtkFeatureEdges>::New();
      featureEdges->FeatureEdgesOff();
      featureEdges->BoundaryEdgesOn();
      featureEdges->NonManifoldEdgesOn();
      featureEdges->SetInputConnection(sphereSource->GetOutputPort());
      featureEdges->Update();

      int numberOfOpenEdges = featureEdges->GetOutput()->GetNumberOfCells();

      if(numberOfOpenEdges > 0)
      {
        std::cout << "Surface is not closed" << std::endl;
      }
      else
      {
        std::cout << "Surface is closed" << std::endl;
      }

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(ClosedSurface)

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

    add_executable(ClosedSurface MACOSX_BUNDLE ClosedSurface.cxx )

    target_link_libraries(ClosedSurface ${VTK_LIBRARIES})

### Download and Build ClosedSurface

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

    cd ClosedSurface/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:

    ./ClosedSurface

WINDOWS USERS

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