render_window.cpp

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#include <pcl/apps/modeler/render_window.h>
#include <pcl/apps/modeler/render_window_item.h>
#include <pcl/apps/modeler/scene_tree.h>
#include <pcl/apps/modeler/dock_widget.h>
#include <pcl/apps/modeler/main_window.h>
#include <vtkProp.h>
#include <vtkRenderer.h>
#include <vtkBoundingBox.h>
#include <vtkSmartPointer.h>
#include <vtkRenderWindow.h>
#include <vtkCubeAxesActor.h>
#include <vtkRendererCollection.h>


pcl::modeler::RenderWindow::RenderWindow(RenderWindowItem* render_window_item, QWidget *parent, Qt::WFlags flags)
  : QVTKWidget(parent, flags),
  axes_(vtkSmartPointer<vtkCubeAxesActor>::New()),
  render_window_item_(render_window_item)
{
  setFocusPolicy(Qt::StrongFocus);
  initRenderer();
  updateAxes();
  setShowAxes(true);
}

pcl::modeler::RenderWindow::~RenderWindow()
{
  DockWidget* dock_widget = dynamic_cast<DockWidget*>(parent());
  if (dock_widget != NULL)
  {
    MainWindow::getInstance().removeDockWidget(dock_widget);
    dock_widget->deleteLater();
  }

  return;
}

void
pcl::modeler::RenderWindow::initRenderer()
{
  vtkSmartPointer<vtkRenderWindow> win = GetRenderWindow();
  vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
  win->AddRenderer(renderer);

  // FPS callback
  //vtkSmartPointer<vtkTextActor> txt = vtkSmartPointer<vtkTextActor>::New ();
  //typedef pcl::visualization::FPSCallback FPSCallback;
  //vtkSmartPointer<FPSCallback> update_fps = vtkSmartPointer<FPSCallback>::New ();
  //update_fps->setTextActor (txt);
  //renderer->AddObserver (vtkCommand::EndEvent, update_fps);
  //renderer->AddActor (txt);

  // Set up render window
  win->AlphaBitPlanesOff ();
  win->PointSmoothingOff ();
  win->LineSmoothingOff ();
  win->PolygonSmoothingOff ();
  win->SwapBuffersOn ();
  win->SetStereoTypeToAnaglyph ();
  win->GetInteractor()->SetDesiredUpdateRate (30.0);

  return;
}

void
pcl::modeler::RenderWindow::focusInEvent(QFocusEvent * event)
{
  dynamic_cast<SceneTree*>(render_window_item_->treeWidget())->selectRenderWindowItem(render_window_item_);

  QVTKWidget::focusInEvent(event);
}

void
pcl::modeler::RenderWindow::setActive(bool flag)
{
  DockWidget* dock_widget = dynamic_cast<DockWidget*>(parent());
  if (dock_widget != NULL)
    dock_widget->setFocusBasedStyle(flag);

  return;
}

void
pcl::modeler::RenderWindow::setTitle(const QString& title)
{
  DockWidget* dock_widget = dynamic_cast<DockWidget*>(parent());
  if (dock_widget != NULL)
    dock_widget->setWindowTitle(title);

  return;
}

void
pcl::modeler::RenderWindow::render()
{
  GetRenderWindow()->Render();
}

void
pcl::modeler::RenderWindow::resetCamera()
{
  double bounds[6];
  GetRenderWindow()->GetRenderers()->GetFirstRenderer()->ComputeVisiblePropBounds(bounds);
  GetRenderWindow()->GetRenderers()->GetFirstRenderer()->ResetCamera(bounds);
  render();
}

void
pcl::modeler::RenderWindow::getBackground(double& r, double& g, double& b)
{
  GetRenderWindow()->GetRenderers()->GetFirstRenderer()->GetBackground(r, g, b);
}

void
pcl::modeler::RenderWindow::setBackground(double r, double g, double b)
{
  GetRenderWindow()->GetRenderers()->GetFirstRenderer()->SetBackground(r, g, b);
}


void
pcl::modeler::RenderWindow::updateAxes()
{
  vtkBoundingBox bb;

  vtkActorCollection* actors = GetRenderWindow()->GetRenderers()->GetFirstRenderer()->GetActors();

  actors->InitTraversal();
  for (int i = 0, i_end = actors->GetNumberOfItems(); i < i_end; ++ i)
  {
    vtkActor* actor = actors->GetNextActor();
    if (actor == axes_.GetPointer())
      continue;

    double actor_bounds[6];
    actor->GetBounds(actor_bounds);
    bb.AddBounds(actor_bounds);
  }

  double bounds[6];
  bb.GetBounds(bounds);
  axes_->SetBounds(bounds);
  axes_->SetCamera(GetRenderWindow()->GetRenderers()->GetFirstRenderer()->GetActiveCamera());
}

void
pcl::modeler::RenderWindow::setShowAxes(bool flag)
{
  if (flag)
    GetRenderWindow()->GetRenderers()->GetFirstRenderer()->AddActor(axes_);
  else
    GetRenderWindow()->GetRenderers()->GetFirstRenderer()->RemoveActor(axes_);

  return;
}