# RuledSurfaceFilter

VTKExamples/Cxx/PolyData/RuledSurfaceFilter

### Code

RuledSurfaceFilter.cxx

    #include <vtkVersion.h>
    #include <vtkSmartPointer.h>

    #include <vtkRuledSurfaceFilter.h>
    #include <vtkRenderer.h>
    #include <vtkRenderWindow.h>
    #include <vtkRenderWindowInteractor.h>
    #include <vtkCellArray.h>
    #include <vtkTransform.h>
    #include <vtkTransformPolyDataFilter.h>
    #include <vtkAppendPolyData.h>
    #include <vtkPolyDataMapper.h>
    #include <vtkProperty.h>
    #include <vtkCamera.h>
    #include <vtkLine.h>

    int main(int, char *[])
    {

      // Create first line.
      vtkSmartPointer<vtkPoints> points =
        vtkSmartPointer<vtkPoints>::New();
      points->InsertPoint(0, 0, 0, 1);
      points->InsertPoint(1, 1, 0, 0);
      points->InsertPoint(2, 0, 1, 0);
      points->InsertPoint(3, 1, 1, 1);

      vtkSmartPointer<vtkLine> line1 =
        vtkSmartPointer<vtkLine>::New();
      line1->GetPointIds()->SetId(0,0);
      line1->GetPointIds()->SetId(1,1);

      vtkSmartPointer<vtkLine> line2 =
        vtkSmartPointer<vtkLine>::New();
      line2->GetPointIds()->SetId(0,2);
      line2->GetPointIds()->SetId(1,3);

      vtkSmartPointer<vtkCellArray> lines =
        vtkSmartPointer<vtkCellArray>::New();
      lines->InsertNextCell(line1);
      lines->InsertNextCell(line2);

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

      vtkSmartPointer<vtkRuledSurfaceFilter> ruledSurfaceFilter =
        vtkSmartPointer<vtkRuledSurfaceFilter>::New();
    #if VTK_MAJOR_VERSION <= 5
      ruledSurfaceFilter->SetInputConnection(polydata->GetProducerPort());
    #else
      ruledSurfaceFilter->SetInputData(polydata);
    #endif
      ruledSurfaceFilter->SetResolution(21, 21);
      ruledSurfaceFilter->SetRuledModeToResample();

      vtkSmartPointer<vtkRenderer> renderer =
        vtkSmartPointer<vtkRenderer>::New();

      vtkSmartPointer<vtkRenderWindow> renderWindow =
        vtkSmartPointer<vtkRenderWindow>::New();
      renderWindow->AddRenderer(renderer);

      vtkSmartPointer<vtkRenderWindowInteractor> interactor =
        vtkSmartPointer<vtkRenderWindowInteractor>::New();
      interactor->SetRenderWindow(renderWindow);

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

      vtkSmartPointer<vtkActor> actor =
        vtkSmartPointer<vtkActor>::New();
      actor->SetMapper(mapper);
      actor->GetProperty()->SetColor(0.89, 0.81, 0.34);

      // Add the actors to the renderer, set the background and size
      renderer->AddActor(actor);
      renderer->SetBackground(.3, .4, .5);

      renderer->ResetCamera();
      renderer->GetActiveCamera()->Azimuth(60);
      renderer->GetActiveCamera()->Elevation(60);
      renderer->GetActiveCamera()->Dolly(1.2);
      renderer->ResetCameraClippingRange();

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

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(RuledSurfaceFilter)

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

    add_executable(RuledSurfaceFilter MACOSX_BUNDLE RuledSurfaceFilter.cxx)

    target_link_libraries(RuledSurfaceFilter ${VTK_LIBRARIES})

### Download and Build RuledSurfaceFilter

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

    cd RuledSurfaceFilter/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:

    ./RuledSurfaceFilter

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.