Method ImageViewer

visualization/src/image_viewer.cpp:56–115

/////////////////////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////////////////////////
pcl::visualization::ImageViewer::ImageViewer (const std::string& window_title)
  : interactor_ (vtkSmartPointer <vtkRenderWindowInteractor>::Take (vtkRenderWindowInteractorFixNew ()))
  , mouse_command_ (vtkSmartPointer<vtkCallbackCommand>::New ())
  , keyboard_command_ (vtkSmartPointer<vtkCallbackCommand>::New ())
  , win_ (vtkSmartPointer<vtkRenderWindow>::New ())
  , ren_ (vtkSmartPointer<vtkRenderer>::New ())
  , slice_ (vtkSmartPointer<vtkImageSlice>::New ())
  , interactor_style_ (vtkSmartPointer<ImageViewerInteractorStyle>::New ())
  , 
   algo_ (vtkSmartPointer<vtkImageFlip>::New ())
{
  // Prepare for image flip
  algo_->SetInterpolationModeToCubic ();
  algo_->PreserveImageExtentOn ();
  algo_->FlipAboutOriginOn ();
  algo_->SetFilteredAxis (1);

  // blend_->SetBlendModeToNormal ();
  // blend_->SetNumberOfThreads (1);

  // Set the mouse/keyboard callbacks
  mouse_command_->SetClientData (this);
  mouse_command_->SetCallback (ImageViewer::MouseCallback);

  keyboard_command_->SetClientData (this);
  keyboard_command_->SetCallback (ImageViewer::KeyboardCallback);

  // Create our own  interactor and set the window title
  win_->SetSize (640, 480);
  win_->AddRenderer (ren_);
  win_->SetWindowName (window_title.c_str ());
  interactor_->SetRenderWindow (win_);

  vtkSmartPointer<vtkImageData> empty_image = vtkSmartPointer<vtkImageData>::New ();
  vtkSmartPointer<vtkImageSliceMapper> map = vtkSmartPointer<vtkImageSliceMapper>::New ();
  map->SetInputData (empty_image);
  slice_->SetMapper (map);
  ren_->AddViewProp (slice_);
  ren_->GetActiveCamera ()->ParallelProjectionOn ();
  interactor_->SetInteractorStyle (interactor_style_);

  // Initialize and create timer
  interactor_->Initialize ();
  timer_id_ = interactor_->CreateRepeatingTimer (0);

  // Set the exit callbacks
  exit_main_loop_timer_callback_ = vtkSmartPointer<ExitMainLoopTimerCallback>::New ();
  exit_main_loop_timer_callback_->window = this;
  exit_main_loop_timer_callback_->right_timer_id = -1;
  interactor_->AddObserver (vtkCommand::TimerEvent, exit_main_loop_timer_callback_);

  exit_callback_ = vtkSmartPointer<ExitCallback>::New ();
  exit_callback_->window = this;
  interactor_->AddObserver (vtkCommand::ExitEvent, exit_callback_);

  // Reset camera (flip it vertically)
  resetStoppedFlag ();