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# ReadPLOT3D

VTKEx/Cxx/IO/ReadPLOT3D

Other languages

See (Java), (CSharp)

Question

If you have a simple question about this example contact us at VTKExProject If your question is more complex and may require extended discussion, please use the VTK Discourse Forum

### Code

ReadPLOT3D.cxx

    #include <vtkPolyData.h>
    #include <vtkMultiBlockPLOT3DReader.h>
    #include <vtkMultiBlockDataSet.h>
    #include <vtkSmartPointer.h>
    #include <vtkPolyDataMapper.h>
    #include <vtkActor.h>
    #include <vtkRenderWindow.h>
    #include <vtkRenderer.h>
    #include <vtkRenderWindowInteractor.h>
    #include <vtkStructuredGridGeometryFilter.h>

    int main ( int argc, char *argv[] )
    {
      if(argc < 3)
      {
        std::cout << "Required parameters: XYZFilename.bin QFileName.bin e.g combxyz.bin combq.bin" << std::endl;
        return EXIT_FAILURE;
      }

      std::string xyzFilename = argv[1];
      std::string qFilename = argv[2];

      vtkSmartPointer<vtkMultiBlockPLOT3DReader> reader =
        vtkSmartPointer<vtkMultiBlockPLOT3DReader>::New();
      reader->SetXYZFileName(xyzFilename.c_str());
      reader->SetQFileName(qFilename.c_str());
      reader->SetScalarFunctionNumber(100);
      reader->SetVectorFunctionNumber(202);
      reader->Update();

      vtkSmartPointer<vtkStructuredGridGeometryFilter> geometryFilter =
        vtkSmartPointer<vtkStructuredGridGeometryFilter>::New();
      geometryFilter->SetInputData(reader->GetOutput()->GetBlock(0));
      geometryFilter->Update();

      // Visualize
      vtkSmartPointer<vtkPolyDataMapper> mapper =
        vtkSmartPointer<vtkPolyDataMapper>::New();
      mapper->SetInputConnection(geometryFilter->GetOutputPort());
      mapper->ScalarVisibilityOff();

      vtkSmartPointer<vtkActor> actor =
        vtkSmartPointer<vtkActor>::New();
      actor->SetMapper(mapper);

      vtkSmartPointer<vtkRenderer> renderer =
        vtkSmartPointer<vtkRenderer>::New();
      vtkSmartPointer<vtkRenderWindow> renderWindow =
        vtkSmartPointer<vtkRenderWindow>::New();
      renderWindow->AddRenderer(renderer);
      vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
        vtkSmartPointer<vtkRenderWindowInteractor>::New();
      renderWindowInteractor->SetRenderWindow(renderWindow);

      renderer->AddActor(actor);
      renderer->SetBackground(.3, .6, .3); // Background color green

      renderWindow->Render();
      renderWindowInteractor->Start();

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

    project(ReadPLOT3D)

    find_package(VTK COMPONENTS
      vtkvtkCommonCore
      vtkvtkCommonDataModel
      vtkvtkFiltersGeometry
      vtkvtkIOParallel
      vtkvtkInteractionStyle
      vtkvtkRenderingContextOpenGL2
      vtkvtkRenderingCore
      vtkvtkRenderingFreeType
      vtkvtkRenderingGL2PSOpenGL2
      vtkvtkRenderingOpenGL2 QUIET)
    if (NOT VTK_FOUND)
      message("Skipping ReadPLOT3D: ${VTK_NOT_FOUND_MESSAGE}")
      return ()
    endif()
    message (STATUS "VTK_VERSION: ${VTK_VERSION}")
    if (VTK_VERSION VERSION_LESS "8.90.0")
      # old system
      include(${VTK_USE_FILE})
      add_executable(ReadPLOT3D MACOSX_BUNDLE ReadPLOT3D.cxx )
      target_link_libraries(ReadPLOT3D PRIVATE ${VTK_LIBRARIES})
    else ()
      # include all components
      add_executable(ReadPLOT3D MACOSX_BUNDLE ReadPLOT3D.cxx )
      target_link_libraries(ReadPLOT3D PRIVATE ${VTK_LIBRARIES})
      # vtk_module_autoinit is needed
      vtk_module_autoinit(
        TARGETS ReadPLOT3D
        MODULES ${VTK_LIBRARIES}
        )
    endif ()

### Download and Build ReadPLOT3D

Click here to download ReadPLOT3D and its CMakeLists.txt file. Once the tarball ReadPLOT3D.tar has been downloaded and extracted,

    cd ReadPLOT3D/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:

    ./ReadPLOT3D

WINDOWS USERS

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