Method RotateObject

Modules/DataTypesExt/src/mitkClippingPlaneInteractor3D.cpp:207–285

}

void mitk::ClippingPlaneInteractor3D::RotateObject(StateMachineAction *, InteractionEvent *interactionEvent)
{
  auto *positionEvent = dynamic_cast<InteractionPositionEvent *>(interactionEvent);
  if (positionEvent == nullptr)
    return;

  double currentWorldPoint[4];
  Point2D currentPickedDisplayPoint = positionEvent->GetPointerPositionOnScreen();
  vtkInteractorObserver::ComputeDisplayToWorld(interactionEvent->GetSender()->GetVtkRenderer(),
                                               currentPickedDisplayPoint[0],
                                               currentPickedDisplayPoint[1],
                                               0.0, // m_InitialInteractionPickedPoint[2],
                                               currentWorldPoint);

  vtkCamera *camera = nullptr;
  vtkRenderer *currentVtkRenderer = nullptr;

  if ((interactionEvent->GetSender()) != nullptr)
  {
    vtkRenderWindow *renderWindow = interactionEvent->GetSender()->GetRenderWindow();
    if (renderWindow != nullptr)
    {
      vtkRenderWindowInteractor *renderWindowInteractor = renderWindow->GetInteractor();
      if (renderWindowInteractor != nullptr)
      {
        currentVtkRenderer = renderWindowInteractor->GetInteractorStyle()->GetCurrentRenderer();
        if (currentVtkRenderer != nullptr)
          camera = currentVtkRenderer->GetActiveCamera();
      }
    }
  }
  if (camera)
  {
    double vpn[3];
    camera->GetViewPlaneNormal(vpn);

    Vector3D viewPlaneNormal;
    viewPlaneNormal[0] = vpn[0];
    viewPlaneNormal[1] = vpn[1];
    viewPlaneNormal[2] = vpn[2];

    Vector3D interactionMove;
    interactionMove[0] = currentWorldPoint[0] - m_InitialPickedWorldPoint[0];
    interactionMove[1] = currentWorldPoint[1] - m_InitialPickedWorldPoint[1];
    interactionMove[2] = currentWorldPoint[2] - m_InitialPickedWorldPoint[2];

    if (interactionMove[0] == 0 && interactionMove[1] == 0 && interactionMove[2] == 0)
      return;

    Vector3D rotationAxis = itk::CrossProduct(viewPlaneNormal, interactionMove);
    rotationAxis.Normalize();

    int *size = currentVtkRenderer->GetSize();
    double l2 = (currentPickedDisplayPoint[0] - m_InitialPickedDisplayPoint[0]) *
                  (currentPickedDisplayPoint[0] - m_InitialPickedDisplayPoint[0]) +
                (currentPickedDisplayPoint[1] - m_InitialPickedDisplayPoint[1]) *
                  (currentPickedDisplayPoint[1] - m_InitialPickedDisplayPoint[1]);