# Glyph2D

VTKExamples/Cxx/Filtering/Glyph2D

### Description

Copy a polydata to every point in the input set. We use a hexagon for the demo.

### Code

Glyph2D.cxx

    #include <vtkVersion.h>
    #include <vtkSmartPointer.h>
    #include <vtkRegularPolygonSource.h>
    #include <vtkPolyData.h>
    #include <vtkPoints.h>
    #include <vtkGlyph2D.h>
    #include <vtkCellArray.h>
    #include <vtkActor.h>
    #include <vtkRenderWindow.h>
    #include <vtkRenderer.h>
    #include <vtkPolyDataMapper.h>
    #include <vtkRenderWindowInteractor.h>
    #include <vtkInteractorStyleImage.h>

    int main(int, char *[])
    {
      vtkSmartPointer<vtkPoints> points =
        vtkSmartPointer<vtkPoints>::New();
      points->InsertNextPoint(0,0,0);
      points->InsertNextPoint(1,1,0);
      points->InsertNextPoint(2,2,0);

      vtkSmartPointer<vtkPolyData> polydata =
        vtkSmartPointer<vtkPolyData>::New();
      polydata->SetPoints(points);

      // Create anything you want here, we will use a polygon for the demo.
      vtkSmartPointer<vtkRegularPolygonSource> polygonSource =
          vtkSmartPointer<vtkRegularPolygonSource>::New(); //default is 6 sides

      vtkSmartPointer<vtkGlyph2D> glyph2D =
        vtkSmartPointer<vtkGlyph2D>::New();
      glyph2D->SetSourceConnection(polygonSource->GetOutputPort());
    #if VTK_MAJOR_VERSION <= 5
      glyph2D->SetInput(polydata);
    #else
      glyph2D->SetInputData(polydata);
    #endif
      glyph2D->Update();

      vtkSmartPointer<vtkPolyDataMapper> mapper =
        vtkSmartPointer<vtkPolyDataMapper>::New();
      mapper->SetInputConnection(glyph2D->GetOutputPort());
      mapper->Update();

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

      // Visualize
      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);

      vtkSmartPointer<vtkInteractorStyleImage> style =
        vtkSmartPointer<vtkInteractorStyleImage>::New();
      renderWindowInteractor->SetInteractorStyle( style );

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

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(Glyph2D)

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

    add_executable(Glyph2D MACOSX_BUNDLE Glyph2D.cxx)

    target_link_libraries(Glyph2D ${VTK_LIBRARIES})

### Download and Build Glyph2D

Click here to download Glyph2D and its CMakeLists.txt file. Once the tarball Glyph2D.tar has been downloaded and extracted,

    cd Glyph2D/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:

    ./Glyph2D

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.