[Image processing] [Reproduced] Test code after VTK installation

#include "vtkConeSource.h"
#include "vtkPolyDataMapper.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkCamera.h"
#include "vtkActor.h"
#include "vtkRenderer.h"
#include "vtkCommand.h"
#include "vtkBoxWidget.h"
#include "vtkTransform.h"
#include "vtkInteractorStyleTrackballCamera.h"

#include <vtkAutoInit.h>
VTK_MODULE_INIT(vtkRenderingOpenGL2);
VTK_MODULE_INIT(vtkInteractionStyle);

class vtkMyCallback : public vtkCommand
{
public:
    static vtkMyCallback* New()
    {
        return new vtkMyCallback;
    }
    void Execute(vtkObject* caller, unsigned long, void*) VTK_OVERRIDE
    {
        vtkTransform* t = vtkTransform::New();
        vtkBoxWidget* widget = reinterpret_cast<vtkBoxWidget*>(caller);
        widget->GetTransform(t);
        widget->GetProp3D()->SetUserTransform(t);
        t->Delete();
    }
};

int main ()
{

    vtkConeSource* cone = vtkConeSource::New();
    cone->SetHeight(3.0);
    cone->SetRadius(1.0);
    cone->SetResolution(10);
    vtkPolyDataMapper* coneMapper = vtkPolyDataMapper::New();
    coneMapper->SetInputConnection(cone->GetOutputPort());

    vtkActor* coneActor = vtkActor::New();
    coneActor->SetMapper(coneMapper);

    vtkRenderer* ren1 = vtkRenderer::New();
    ren1->AddActor(coneActor);
    ren1->SetBackground(0.1, 0.2, 0.4);

    vtkRenderWindow* renWin = vtkRenderWindow::New();
    renWin->AddRenderer(ren1);
    renWin->SetSize(300, 300);

    vtkRenderWindowInteractor * iren = vtkRenderWindowInteractor :: New ();
    iren-> SetRenderWindow (renWin);

    vtkInteractorStyleTrackballCamera* style =
        vtkInteractorStyleTrackballCamera::New();
    iren->SetInteractorStyle(style);

    vtkBoxWidget* boxWidget = vtkBoxWidget::New();
    boxWidget->SetInteractor(iren);
    boxWidget->SetPlaceFactor(1.25);
    boxWidget->SetProp3D(coneActor);
    boxWidget->PlaceWidget();
    vtkMyCallback* callback = vtkMyCallback::New();
    boxWidget->AddObserver(vtkCommand::InteractionEvent, callback);

    
    boxWidget->On();

    
    iren-> Initialize ();
    iren-> Start ();

    
    cone->Delete();
    coneMapper->Delete();
    coneActor->Delete();
    callback->Delete();
    boxWidget->Delete();
    ren1->Delete();
    renWin->Delete();
    iren->Delete();
    style->Delete();

    return 0;
}

The results show that:

See: https://blog.csdn.net/GENGXINGGUANG/article/details/106820207