# ConcatenateArray

VTKExamples/Cxx/TextAnalysis/ConcatenateArray

### Code

ConcatenateArray.cxx

    #include <vtkSmartPointer.h>
    #include <vtkConcatenateArray.h>
    #include <vtkDenseArray.h>

    int main(int, char *[])
    {
      vtkSmartPointer<vtkDenseArray<double> > array0 =
        vtkSmartPointer<vtkDenseArray<double> >::New();
      array0->Resize(2);
      array0->SetValue(0, 0);
      array0->SetValue(1, 1);

      vtkSmartPointer<vtkDenseArray<double> > array1 =
        vtkSmartPointer<vtkDenseArray<double> >::New();
      array1->Resize(2);
      array1->SetValue(0, 2);
      array1->SetValue(1, 3);

      vtkSmartPointer<vtkArrayData> arrayData0 =
        vtkSmartPointer<vtkArrayData>::New();
      arrayData0->AddArray(array0);
      arrayData0->Update();

      vtkSmartPointer<vtkArrayData> arrayData1 =
        vtkSmartPointer<vtkArrayData>::New();
      arrayData1->AddArray(array1);
      arrayData1->Update();

      vtkSmartPointer<vtkConcatenateArray> concatenateArray =
        vtkSmartPointer<vtkConcatenateArray>::New();
      concatenateArray->SetInput(0, arrayData0);
      concatenateArray->SetInput(1, arrayData1);
      concatenateArray->Update();

      vtkSmartPointer<vtkArrayData> outputArrayData = concatenateArray->GetOutput();
      vtkSmartPointer<vtkDenseArray<double> > outputArray = vtkDenseArray<double>::SafeDownCast(outputArrayData->GetArray(0));

      std::cout << outputArray->GetValue(0) << std::endl;
      std::cout << outputArray->GetValue(1) << std::endl;
      std::cout << outputArray->GetValue(2) << std::endl;
      std::cout << outputArray->GetValue(3) << std::endl;

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(ConcatenateArray)

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

    add_executable(ConcatenateArray MACOSX_BUNDLE ConcatenateArray.cxx )

    target_link_libraries(ConcatenateArray ${VTK_LIBRARIES})

### Download and Build ConcatenateArray

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

    cd ConcatenateArray/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:

    ./ConcatenateArray

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.