EventDisplay¶

Contents:

The event display is a visualization tool which displays the detector geometry and the data objects of the different reconstruction stages within PandaRoot.

It is based on the FairEventDisplay which delivers most of the functionality. Within PandaRoot only a few extensions for PANDA specific data types are done.

Start via macro¶

The event display is started via the macro macro/tools/eventDisplay.C. The only parameter is the prefix for the data files to be displayed. If no prefix is given the default string ../data/evtcomplete is taken. The macro automatically tries to include the sim, digi and reco file and visualizes the data objects therein. If only specific data objects should be displayed the other objects have to be commented out in the macro.

Usage of the event display¶

The startup of the event display shows a side view of the detector.

The view of the detector model can be controlled either via the mouse or the keyboard:

Detector model inside event view¶
action	mouse	mouse + keyboard	keyboard
rotate	left button	shift (fast), control (slow)
zoom	right button or scroll wheel		in (+, j), out (-, k)
shift	middle button	command	arrow keys
wire frame			w
solid			r
solid + boundaries			t
toggle background			e

In addition three other views are available: RPhi View, RhoZ View and Multi View. They can be accessed via the tabs on top of the page.

TIP Underneath the Hide tab is a hidden menu bar with File and Camera (see red arrow). Here you can save screenshots of the display or change the perspective of the view. Especially the Orthographic (XOY) is very useful to look along the beam axis onto the detector.