# PolyDataAlgorithmReader

VTKExamples/Cxx/Developers/PolyDataAlgorithmReader

### Description

This example demonstrates a reader that takes nothing as input and produces a vtkPolyData as output.

### Code

PolyDataAlgorithmReader.cxx

    #include <vtkSmartPointer.h>
    #include <vtkPolyData.h>

    #include "vtkTestReader.h"

    int main (int, char *[])
    {
      vtkSmartPointer<vtkTestReader> reader =
        vtkSmartPointer<vtkTestReader>::New();
      reader->Update();

      vtkPolyData* polydata = reader->GetOutput();
      polydata->Print(std::cout);

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(PolyDataAlgorithmReader)

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

    add_executable(PolyDataAlgorithmReader MACOSX_BUNDLE PolyDataAlgorithmReader.cxx)

    target_link_libraries(PolyDataAlgorithmReader ${VTK_LIBRARIES})

### Download and Build PolyDataAlgorithmReader

Danger

The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.

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

    cd PolyDataAlgorithmReader/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:

    ./PolyDataAlgorithmReader

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.