VTK vtkSplineWidget

#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSmartPointer.h>
#include <vtkSplineWidget2.h>

int main(int, char* [])
{
     
    vtkSmartPointer<vtkRenderer> renderer =
        vtkSmartPointer<vtkRenderer>::New();
    vtkSmartPointer<vtkRenderWindow> renderWindow =
        vtkSmartPointer<vtkRenderWindow>::New();
    renderWindow->AddRenderer(renderer);

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

    vtkSmartPointer<vtkSplineWidget2> splineWidget =
        vtkSmartPointer<vtkSplineWidget2>::New();
    splineWidget->SetInteractor(renderWindowInteractor);

    renderWindowInteractor->Initialize();
    renderWindow->Render();
    splineWidget->On();
    renderer->ResetCamera();
    renderWindowInteractor->Start();

    return EXIT_SUCCESS;
}