# ParametricSuperEllipsoidDemo

VTKExamples/Cxx/GeometricObjects/ParametricSuperEllipsoidDemo

### Code

ParametricSuperEllipsoidDemo.cxx

    #include <vtkSmartPointer.h>

    #include <vtkParametricSuperEllipsoid.h>
    #include <vtkParametricFunctionSource.h>

    #include <vtkCamera.h>
    #include <vtkPolyDataMapper.h>
    #include <vtkActor.h>
    #include <vtkActor2D.h>
    #include <vtkProperty.h>
    #include <vtkRenderWindow.h>
    #include <vtkRenderer.h>
    #include <vtkRenderWindowInteractor.h>
    #include <vtkMath.h>

    #include <vtkCommand.h>
    #include <vtkSliderWidget.h>
    #include <vtkSliderRepresentation2D.h>

    // These callbacks do the actual work.
    // Callbacks for the interactions
    class SliderCallbackN1 : public vtkCommand
    {
    public:
      static SliderCallbackN1 *New()
      {
        return new SliderCallbackN1;
      }
      virtual void Execute(vtkObject *caller, unsigned long, void*)
      {
        vtkSliderWidget *sliderWidget =
          reinterpret_cast<vtkSliderWidget*>(caller);
        double value = static_cast<vtkSliderRepresentation2D *>(sliderWidget->GetRepresentation())->GetValue();
        this->SuperEllipsoid->SetN1(value);
      }
      SliderCallbackN1():SuperEllipsoid(0) {}
      vtkParametricSuperEllipsoid *SuperEllipsoid;
    };

    class SliderCallbackN2 : public vtkCommand
    {
    public:
      static SliderCallbackN2 *New()
      {
        return new SliderCallbackN2;
      }
      virtual void Execute(vtkObject *caller, unsigned long, void*)
      {
        vtkSliderWidget *sliderWidget =
          reinterpret_cast<vtkSliderWidget*>(caller);
        double value = static_cast<vtkSliderRepresentation2D *>(sliderWidget->GetRepresentation())->GetValue();
        this->SuperEllipsoid->SetN2(value);
      }
      SliderCallbackN2():SuperEllipsoid(0) {}
      vtkParametricSuperEllipsoid *SuperEllipsoid;
    };

    int main(int, char *[])
    {
      vtkSmartPointer<vtkParametricSuperEllipsoid> surface =
        vtkSmartPointer<vtkParametricSuperEllipsoid>::New();
      vtkSmartPointer<vtkParametricFunctionSource> source =
        vtkSmartPointer<vtkParametricFunctionSource>::New();

      vtkSmartPointer<vtkRenderer> renderer =
        vtkSmartPointer<vtkRenderer>::New();
      vtkSmartPointer<vtkPolyDataMapper> mapper =
        vtkSmartPointer<vtkPolyDataMapper>::New();
      vtkSmartPointer<vtkActor> actor =
        vtkSmartPointer<vtkActor>::New();

      vtkSmartPointer<vtkProperty> backProperty =
        vtkSmartPointer<vtkProperty>::New();
      backProperty->SetColor(1.0000, 0.3882, 0.2784);

      // Create a parametric function source, renderer, mapper, and actor
      source->SetParametricFunction(surface);

      mapper->SetInputConnection(source->GetOutputPort());

      actor->SetMapper(mapper);
      actor->SetBackfaceProperty(backProperty);
      actor->GetProperty()->SetDiffuseColor(0.8900, 0.8100, 0.3400);

      vtkSmartPointer<vtkRenderWindow> renderWindow =
        vtkSmartPointer<vtkRenderWindow>::New();
      renderWindow->AddRenderer(renderer);
      renderWindow->SetSize(640,480);
      renderer->AddActor(actor);
      renderer->SetBackground(.2, .3, .4);
      renderer->ResetCamera();
      renderer->GetActiveCamera()->Azimuth(30);
      renderer->GetActiveCamera()->Elevation(-30);
      renderer->GetActiveCamera()->Zoom(0.9);
      renderer->ResetCameraClippingRange();

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

      // Setup a slider widget for each varying parameter
      double tubeWidth(.004);
      double sliderLength(.004);
      double titleHeight(.02);
      double labelHeight(.02);

      vtkSmartPointer<vtkSliderRepresentation2D> sliderRepN1 =
        vtkSmartPointer<vtkSliderRepresentation2D>::New();

      sliderRepN1->SetMinimumValue(0.0);
      sliderRepN1->SetMaximumValue(4.0);
      sliderRepN1->SetValue(1.0);
      sliderRepN1->SetTitleText("Z squareness");

      sliderRepN1->GetPoint1Coordinate()->SetCoordinateSystemToNormalizedDisplay();
      sliderRepN1->GetPoint1Coordinate()->SetValue(.1, .1);
      sliderRepN1->GetPoint2Coordinate()->SetCoordinateSystemToNormalizedDisplay();
      sliderRepN1->GetPoint2Coordinate()->SetValue(.9, .1);

      sliderRepN1->SetTubeWidth(tubeWidth);
      sliderRepN1->SetSliderLength(sliderLength);
      sliderRepN1->SetTitleHeight(titleHeight);
      sliderRepN1->SetLabelHeight(labelHeight);

      vtkSmartPointer<vtkSliderWidget> sliderWidgetN1 =
        vtkSmartPointer<vtkSliderWidget>::New();
      sliderWidgetN1->SetInteractor(interactor);
      sliderWidgetN1->SetRepresentation(sliderRepN1);
      sliderWidgetN1->SetAnimationModeToAnimate();
      sliderWidgetN1->EnabledOn();

      vtkSmartPointer<SliderCallbackN1> callbackN1 =
        vtkSmartPointer<SliderCallbackN1>::New();
      callbackN1->SuperEllipsoid = surface;

      sliderWidgetN1->AddObserver(vtkCommand::InteractionEvent,callbackN1);

      vtkSmartPointer<vtkSliderRepresentation2D> sliderRepN2 =
        vtkSmartPointer<vtkSliderRepresentation2D>::New();

      sliderRepN2->SetMinimumValue(0.0001);
      sliderRepN2->SetMaximumValue(4.0);
      sliderRepN2->SetValue(1.0);
      sliderRepN2->SetTitleText("XY squareness");

      sliderRepN2->GetPoint1Coordinate()->SetCoordinateSystemToNormalizedDisplay();
      sliderRepN2->GetPoint1Coordinate()->SetValue(.1, .9);
      sliderRepN2->GetPoint2Coordinate()->SetCoordinateSystemToNormalizedDisplay();
      sliderRepN2->GetPoint2Coordinate()->SetValue(.9, .9);

      sliderRepN2->SetTubeWidth(tubeWidth);
      sliderRepN2->SetSliderLength(sliderLength);
      sliderRepN2->SetTitleHeight(titleHeight);
      sliderRepN2->SetLabelHeight(labelHeight);

      vtkSmartPointer<vtkSliderWidget> sliderWidgetN2 =
        vtkSmartPointer<vtkSliderWidget>::New();
      sliderWidgetN2->SetInteractor(interactor);
      sliderWidgetN2->SetRepresentation(sliderRepN2);
      sliderWidgetN2->SetAnimationModeToAnimate();
      sliderWidgetN2->EnabledOn();

      vtkSmartPointer<SliderCallbackN2> callbackN2 =
        vtkSmartPointer<SliderCallbackN2>::New();
      callbackN2->SuperEllipsoid = surface;

      sliderWidgetN2->AddObserver(vtkCommand::InteractionEvent,callbackN2);

      vtkSmartPointer<vtkSliderRepresentation2D> sliderRepMinimumV =
        vtkSmartPointer<vtkSliderRepresentation2D>::New();

      sliderRepN1->SetMinimumValue(.0001);
      sliderRepMinimumV->SetMaximumValue(.9999*vtkMath::Pi());
      sliderRepMinimumV->SetValue(.0001);
      sliderRepMinimumV->SetTitleText("V min");

      sliderRepMinimumV->GetPoint1Coordinate()->SetCoordinateSystemToNormalizedDisplay();
      sliderRepMinimumV->GetPoint1Coordinate()->SetValue(.1, .1);
      sliderRepMinimumV->GetPoint2Coordinate()->SetCoordinateSystemToNormalizedDisplay();
      sliderRepMinimumV->GetPoint2Coordinate()->SetValue(.1, .9);

      sliderRepMinimumV->SetTubeWidth(tubeWidth);
      sliderRepMinimumV->SetSliderLength(sliderLength);
      sliderRepMinimumV->SetTitleHeight(titleHeight);
      sliderRepMinimumV->SetLabelHeight(labelHeight);

      surface->SetN1(1.0);
      surface->SetN2(1.0);

      renderer->ResetCamera();
      renderer->GetActiveCamera()->Azimuth(30);
      renderer->GetActiveCamera()->Elevation(-30);
      renderer->GetActiveCamera()->Zoom(0.9);
      renderer->ResetCameraClippingRange();
      renderWindow->Render();

      interactor->Initialize();

      interactor->Start();

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(ParametricSuperEllipsoidDemo)

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

    add_executable(ParametricSuperEllipsoidDemo MACOSX_BUNDLE ParametricSuperEllipsoidDemo.cxx )

    target_link_libraries(ParametricSuperEllipsoidDemo ${VTK_LIBRARIES})

### Download and Build ParametricSuperEllipsoidDemo

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

    cd ParametricSuperEllipsoidDemo/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:

    ./ParametricSuperEllipsoidDemo

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.