The PANORAMIX Project

This page contains technical information about data visualization in LHCb, including documentation for developers and expert users of the LHCb event display (Panoramix).

Tutorial and Examples

 A nice page for first time users of Panoramix, maintained by Thomas Ruf, is available here. It includes an introductory tutorial ( .pdf, only for IE .html) and a picture gallery. See also the Panoramix FAQ. The old reconstruction pages with lots of Panoramix pictures are here TREC (scroll down, right side).

Latest Additions

• Database tags, condition & DDDB & simulation yes/no, are directly extracted from the Rec/Header of the first event by using directly ROOT and then used to configure Panoramix. Works for DST and uDST.
• Interesting for CPV studies, acceptance asymmetries: Virtual track trajectory drawn of charge conjugated state, via pull down menu by clicking on a track object or by setting session().setParameter('modeling.what','ChargeConjugate')
• "--BareConfig 1" option can be used to speed up initialization in case no reconstruction should run later on
• If datatype given, then database tags should be provided in user opts file to be loaded with -v. Or add F at end of datatype to force latest tag, enter -D 2011L
• List of input files can be given with option -f, need to be separated by comma : python $myPanoramix -f fileA,fileB,fileC,... NOTE: a new file can also be opened at any time while Panoramix is running. No need to quit, and start again with new file as input, via File / Open in the top menu bar.

Known issues

• None

Data Visualization

The LHCb model for data visualization is described in some detail in the Data Visualization chapter of the Gaudi User Guide. You can refer to it to get an overview of how data visualization (and user interactivity) is added to the Gaudi Framework.  In the current implementation, data visualization is provided by a number of  Gaudi services (OnXSvc, SoLHCb, etc.)

Python

• A lot of the functionality of Panoramix is inside (Gaudi)python scripts. More information about GaudiPython can be found in this basic tutorial.

The Gaudi Visualization services

The visualization set of services are based on the OnX package for interactivity and Open Inventor (SoFree implementation) for the graphics . The design of the services and the technologies on which it is based is described  here.

• General Installation instructions

Project History

The history of dependencies and included packages can be viewed for any tagged version (including the ones that have been removed) from the SVN web interface. Check for the versions with the relevant SVN tags. For project dependencies see the PANORAMIX_vXrY/cmt/project.cmt file. For the versions of the packages included in the PANORAMIX project see the PanoramixSys/vXrY/cmt/requirements file. Some more dependencies can be read from the Vis/Panoramix/vXrY/cmt/requirements file.