Add annotation in the 3D view to display run parameters

Author: pnwkw

EventVisualisation/View/include/EventVisualisationView/MultiView.h

@@ -18,6 +18,7 @@
 #ifndef ALICE_O2_EVENTVISUALISATION_VIEW_MULTIVIEW_H
 #define ALICE_O2_EVENTVISUALISATION_VIEW_MULTIVIEW_H
 
+#include <TGLAnnotation.h>
 #include <TGLViewer.h>
 #include <TEveGeoShape.h>
 #include <TEveScene.h>
@@ -90,6 +91,9 @@ class MultiView
   /// Registers an element to be drawn
   void registerElement(TEveElement* event); // override;
 
+  /// Get annotation pointer
+  TGLAnnotation* getAnnotation() { return mAnnotation.get(); }
+
   ///
   void registerEvent(TEveElement* event) { return registerElement(event); }
   /// Removes all shapes representing current event
@@ -108,6 +112,7 @@ class MultiView
   TEveScene* mScenes[NumberOfScenes];                       ///< Array of all geometry and event scenes
   TEveProjectionManager* mProjections[NumberOfProjections]; ///< Array of all projection managers
   std::vector<TEveGeoShape*> mDetectors;                    ///< Vector of detector geometries
+  std::unique_ptr<TGLAnnotation> mAnnotation;               ///< 3D view annotation
 
   std::string mSceneNames[NumberOfScenes];        ///< Names of event and geometry scenes
   std::string mSceneDescriptions[NumberOfScenes]; ///< Descriptions of event and geometry scenes

EventVisualisation/View/src/EventManager.cxx

@@ -75,6 +75,8 @@ void EventManager::displayCurrentEvent()
     for (int i = 0; i < EVisualisationDataType::NdataTypes; ++i) {
       MultiView::getInstance()->registerElement(dataTypeLists[i]);
     }
+
+    MultiView::getInstance()->getAnnotation()->SetText(TString::Format("Run: %d", displayList[0].first.getRunNumber()));
   }
   MultiView::getInstance()->redraw3D();
 }
@@ -169,12 +171,12 @@ void EventManager::displayVisualisationEvent(VisualisationEvent& event, const st
   for (size_t i = 0; i < trackCount; ++i) {
     VisualisationTrack track = event.getTrack(i);
     TEveRecTrackD t;
-    //double* p = track.getMomentum();
-    //t.fP = {p[0], p[1], p[2]};
+    // double* p = track.getMomentum();
+    // t.fP = {p[0], p[1], p[2]};
     t.fSign = track.getCharge() > 0 ? 1 : -1;
     auto* vistrack = new TEveTrack(&t, &TEveTrackPropagator::fgDefault);
     vistrack->SetLineColor(kMagenta);
-    //vistrack->SetName(detectorName + " track: " + i);
+    // vistrack->SetName(detectorName + " track: " + i);
     vistrack->SetName(track.getGIDAsString().c_str());
     size_t pointCount = track.getPointCount();
     vistrack->Reset(pointCount);

EventVisualisation/View/src/EventManagerFrame.cxx

@@ -250,7 +250,10 @@ void EventManagerFrame::DoScreenshot()
   TASImage image(width, height);
   image.FillRectangle(backgroundColor, 0, 0, width, height);
 
+  auto annotationState = MultiView::getInstance()->getAnnotation()->GetState();
+  MultiView::getInstance()->getAnnotation()->SetState(TGLOverlayElement::kInvisible);
   TImage* view3dImage = MultiView::getInstance()->getView(MultiView::EViews::View3d)->GetGLViewer()->GetPictureUsingBB();
+  MultiView::getInstance()->getAnnotation()->SetState(annotationState);
   scaledImage = ScaleImage((TASImage*)view3dImage, width * 0.65, height * 0.95);
   if (scaledImage) {
     CopyImage(&image, scaledImage, width * 0.015, height * 0.025, 0, 0, scaledImage->GetWidth(), scaledImage->GetHeight());

EventVisualisation/View/src/MultiView.cxx

@@ -143,6 +143,12 @@ void MultiView::setupMultiview()
   mViews[ViewZrho]->GetGLViewer()->SetCurrentCamera(TGLViewer::kCameraOrthoXOY);
   mViews[ViewZrho]->AddScene(mScenes[SceneZrhoGeom]);
   mViews[ViewZrho]->AddScene(mScenes[SceneZrhoEvent]);
+
+  mAnnotation = std::make_unique<TGLAnnotation>(mViews[View3d]->GetGLViewer(), "", 0, 1.0);
+  mAnnotation->SetState(TGLOverlayElement::kDisabled); // make the annotation non-interactive
+  mAnnotation->SetUseColorSet(false);                  // make the colors individually changeable
+  mAnnotation->SetTextColor(0);                        // default color white
+  mAnnotation->SetTextSize(0.06f);
 }
 
 MultiView::EScenes MultiView::getSceneOfProjection(EProjections projection)