TEveEventDisplay

The Mu2e TEveEventDisplay

EVE is the Event Visualization Environment within ROOT. It is used extensively in HEP. EVE provides an application framework for the construction of event-display programs and is built on top of ROOT's GUI, GL and GED infrastructure allowing it to easily integrate with the existing Mu2e Framework. TEve GUI interface allows the users to view the geometry and tracks in interactively and zoom in on and rotate interesting features.

Within Mu2e a TEve based Event Display has been developed. It resides in the TEveEventDisplay directory.

The display allows 3D graphics rendering based on the Mu2e GDML. The user has control as to which aspects of Mu2e can be displayed .i.e PS, TS, DS, CRV are optional. The user can also control which data products are displayed. In addition to the 3D display, a 2D projection of the Tracker (in XZ and XY) and Calorimeter (2 disks in XY) is also provided.

Code Structure

Using The Mu2e TEveEventDisplay

The TEveEventDisplay is run using the ART module "TEveEventDisplay_module." This is an ART Analyzer and can be used in the same was as a regular ART Analyzer.

The User can select which Data Products are displayed and the Instances to display by editing the FCL parameters which are input to the Collection Filler. These are listed with default values in the TEveEventDisplay prolog.fcl.

Resources

• TEve : https://root.cern.ch/eve
• Root TEve Examples : https://root.cern.ch/root/html608/group__tutorial__eve.html
• Alice EVE - a very useful example of a nice TEve based Event Display: https://github.com/alisw/AliRoot/tree/master/EVE/EveBase