# ShrinkPolyData

VTKExamples/Cxx/PolyData/ShrinkPolyData

### Code

ShrinkPolyData.cxx

    #include <vtkSmartPointer.h>
    #include <vtkPolyData.h>
    #include <vtkSphereSource.h>
    #include <vtkShrinkPolyData.h>
    #include <vtkXMLPolyDataWriter.h>

    int main(int, char *[])
    {
      vtkSmartPointer<vtkSphereSource> sphereSource =
          vtkSmartPointer<vtkSphereSource>::New();
      sphereSource->SetRadius(10);
      sphereSource->SetPhiResolution(50);
      sphereSource->SetThetaResolution(50);
      sphereSource->Update();

      {
      vtkSmartPointer<vtkXMLPolyDataWriter> writer =
        vtkSmartPointer<vtkXMLPolyDataWriter>::New();
      writer->SetFileName("sphere.vtp");
      writer->SetInputConnection(sphereSource->GetOutputPort());
      writer->Write();
      }

      vtkSmartPointer<vtkShrinkPolyData> shrinkFilter =
          vtkSmartPointer<vtkShrinkPolyData>::New();
      shrinkFilter->SetInputConnection(sphereSource->GetOutputPort());
      shrinkFilter->Update();

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

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(ShrinkPolyData)

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

    add_executable(ShrinkPolyData MACOSX_BUNDLE ShrinkPolyData.cxx)

    target_link_libraries(ShrinkPolyData ${VTK_LIBRARIES})

### Download and Build ShrinkPolyData

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

    cd ShrinkPolyData/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:

    ./ShrinkPolyData

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.