# MultiBlockMergeFilter

VTKExamples/Cxx/PolyData/MultiBlockMergeFilter

### Code

MultiBlockMergeFilter.cxx

    #include <vtkVersion.h>
    #include <vtkSmartPointer.h>
    #include <vtkPoints.h>
    #include <vtkPolyData.h>
    #include <vtkSphereSource.h>
    #include <vtkMultiBlockMergeFilter.h>
    #include <vtkMultiBlockDataSet.h>

    int main(int, char *[])
    {

      vtkSmartPointer<vtkSphereSource> sphereSource1 =
        vtkSmartPointer<vtkSphereSource>::New();
      sphereSource1->Update();

      vtkSmartPointer<vtkSphereSource> sphereSource2 =
        vtkSmartPointer<vtkSphereSource>::New();
      sphereSource2->SetCenter(10,10,10);
      sphereSource2->Update();

      vtkSmartPointer<vtkMultiBlockDataSet> multiBlockDataSet1 =
        vtkSmartPointer<vtkMultiBlockDataSet>::New();
      multiBlockDataSet1->SetNumberOfBlocks(1);
      multiBlockDataSet1->SetBlock(0, sphereSource1->GetOutput());
    #if VTK_MAJOR_VERSION <= 5
      multiBlockDataSet1->Update();
    #endif

      vtkSmartPointer<vtkMultiBlockDataSet> multiBlockDataSet2 =
        vtkSmartPointer<vtkMultiBlockDataSet>::New();
      multiBlockDataSet2->SetNumberOfBlocks(1);
      multiBlockDataSet2->SetBlock(0, sphereSource2->GetOutput());
    #if VTK_MAJOR_VERSION <= 5
      multiBlockDataSet2->Update();
    #endif

      vtkSmartPointer<vtkMultiBlockMergeFilter> multiBlockMergeFilter =
          vtkSmartPointer<vtkMultiBlockMergeFilter>::New();
    #if VTK_MAJOR_VERSION <= 5
      multiBlockMergeFilter->AddInput(multiBlockDataSet1);
      multiBlockMergeFilter->AddInput(multiBlockDataSet2);
    #else
      multiBlockMergeFilter->AddInputData(multiBlockDataSet1);
      multiBlockMergeFilter->AddInputData(multiBlockDataSet2);
    #endif
      multiBlockMergeFilter->Update();

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(MultiBlockMergeFilter)

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

    add_executable(MultiBlockMergeFilter MACOSX_BUNDLE MultiBlockMergeFilter.cxx )

    target_link_libraries(MultiBlockMergeFilter ${VTK_LIBRARIES})

### Download and Build MultiBlockMergeFilter

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

    cd MultiBlockMergeFilter/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:

    ./MultiBlockMergeFilter

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.