# EmbedPointsIntoVolume

VTKExamples/Cxx/PolyData/EmbedPointsIntoVolume

### Code

EmbedPointsIntoVolume.cxx

    #include <vtkPolyData.h>
    #include <vtkImageData.h>
    #include <vtkSmartPointer.h>
    #include <vtkXMLPolyDataReader.h>
    #include <vtkXMLImageDataWriter.h>
    #include <vtkGaussianSplatter.h>
    #include <vtkSphereSource.h>
    #include <vtkRenderer.h>
    #include <vtkRenderWindow.h>
    #include <vtkRenderWindowInteractor.h>
    #include <vtkContourFilter.h>
    #include <vtkPolyDataMapper.h>
    #include <vtkActor.h>
    #include <vtkProperty.h>

    int main(int argc, char *argv[])
    {
      vtkSmartPointer<vtkPolyData> input =
        vtkSmartPointer<vtkPolyData>::New();

      if(argc == 1) // Generate the data
      {
        vtkSmartPointer<vtkSphereSource> sphereSource =
          vtkSmartPointer<vtkSphereSource>::New();
        sphereSource->SetRadius(.01);
        sphereSource->Update();
        input->ShallowCopy(sphereSource->GetOutput());
      }
      else // Read the data from a file
      {
        vtkSmartPointer<vtkXMLPolyDataReader> reader =
          vtkSmartPointer<vtkXMLPolyDataReader>::New();
        reader->SetFileName(argv[1]);
        reader->Update();

        input->ShallowCopy(reader->GetOutput());

      }

      vtkSmartPointer<vtkGaussianSplatter> splatter =
        vtkSmartPointer<vtkGaussianSplatter>::New();
      splatter->SetInputData(input);

      unsigned int n = 200;
      splatter->SetSampleDimensions(n,n,n);
      splatter->SetRadius(.02);
      splatter->SetExponentFactor(-10);
      splatter->SetEccentricity(2);
      splatter->Update();

      vtkSmartPointer<vtkContourFilter> isoSurface =
        vtkSmartPointer<vtkContourFilter>::New();
      isoSurface->SetInputConnection(splatter->GetOutputPort());
      isoSurface->SetValue(0, .95 * splatter->GetRadius());

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

      vtkSmartPointer<vtkActor> actor =
        vtkSmartPointer<vtkActor>::New();
      actor->SetMapper(mapper);
      actor->GetProperty()->SetColor(1.0, 0.3882, 0.2784);

      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(.2, .3, .4);

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

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

    project(EmbedPointsIntoVolume)

    find_package(VTK COMPONENTS
      vtkCommonCore
      vtkCommonDataModel
      vtkFiltersCore
      vtkFiltersSources
      vtkIOXML
      vtkImagingHybrid
      vtkInteractionStyle
      vtkRenderingCore
      vtkRenderingFreeType
      vtkRenderingOpenGL2 QUIET)
    if (NOT VTK_FOUND)
      message("Skipping EmbedPointsIntoVolume: ${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(EmbedPointsIntoVolume MACOSX_BUNDLE EmbedPointsIntoVolume.cxx )
      target_link_libraries(EmbedPointsIntoVolume PRIVATE ${VTK_LIBRARIES})
    else ()
      # include all components
      add_executable(EmbedPointsIntoVolume MACOSX_BUNDLE EmbedPointsIntoVolume.cxx )
      target_link_libraries(EmbedPointsIntoVolume PRIVATE ${VTK_LIBRARIES})
      # vtk_module_autoinit is needed
      vtk_module_autoinit(
        TARGETS EmbedPointsIntoVolume
        MODULES ${VTK_LIBRARIES}
        )
    endif ()

### Download and Build EmbedPointsIntoVolume

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

    cd EmbedPointsIntoVolume/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:

    ./EmbedPointsIntoVolume

WINDOWS USERS

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