# ImageDataToPointSet

VTKExamples/Cxx/ImageData/ImageDataToPointSet

### Code

ImageDataToPointSet.cxx

    #include <vtkVersion.h>
    #include <vtkImageData.h>
    #include <vtkPoints.h>
    #include <vtkImageDataToPointSet.h>
    #include <vtkSmartPointer.h>
    #include <vtkXMLStructuredGridWriter.h>
    #include <vtkStructuredGrid.h>

    static void CreateImage(vtkImageData* image);

    int main(int, char *[])
    {
      vtkSmartPointer<vtkImageData> image =
        vtkSmartPointer<vtkImageData>::New();
      CreateImage(image);

      vtkSmartPointer<vtkImageDataToPointSet> imageDataToPointSet =
        vtkSmartPointer<vtkImageDataToPointSet>::New();
    #if VTK_MAJOR_VERSION <= 5
      imageDataToPointSet->SetInputConnection(image->GetProducerPort());
    #else
      imageDataToPointSet->SetInputData(image);
    #endif
      imageDataToPointSet->Update();

      vtkSmartPointer<vtkXMLStructuredGridWriter> writer =
        vtkSmartPointer<vtkXMLStructuredGridWriter>::New();
      writer->SetInputConnection(imageDataToPointSet->GetOutputPort());
      writer->SetFileName("Test.vts");
      writer->Write();

      return EXIT_SUCCESS;
    }

    void CreateImage(vtkImageData* image)
    {
      // Create an image
      image->SetDimensions(3,3,1);
    #if VTK_MAJOR_VERSION <= 5
      image->SetNumberOfScalarComponents(1);
      image->SetScalarTypeToUnsignedChar();
    #else
      image->AllocateScalars(VTK_UNSIGNED_CHAR,1);
    #endif

      int dims[3];
      image->GetDimensions(dims);
      for(int i = 0; i < dims[0]; i++)
      {
        for(int j = 0; j < dims[1]; j++)
        {
          unsigned char* pixel = static_cast<unsigned char*>(image->GetScalarPointer(i,j,0));
          pixel[0] = 1;
        }
      }
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(ImageDataToPointSet)

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

    add_executable(ImageDataToPointSet MACOSX_BUNDLE ImageDataToPointSet.cxx )

    target_link_libraries(ImageDataToPointSet ${VTK_LIBRARIES})

### Download and Build ImageDataToPointSet

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

    cd ImageDataToPointSet/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:

    ./ImageDataToPointSet

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.