3.4.3 Fireworks Geometry

• Producing Geometry File
• Viewing with cmsShow
  • Browsing detector geometry
  • CmsShow Help
• Presentations

Introduction

This document is a user guide how to produce and efficiently visualize cms geometries in a Fireworks. With first step DDD geometry is converted to TGeo format and then display in Geometry Table View. Note, this is not the geometry format which is used for drawing rec hits and detectors in projected views.

Producing TGeo files

Geometry files can be produced with cmsRun. The configuration script scrips take an argument which specifies geometry configuration. Output of cmsRun is cmsSimGeo<tag>.root and cmsTGeoRecoGeom<tag>.root for simulation and reconstruction geometry.

• Simulation Geometry

   cmsRun Fireworks/Geometry/python/dumpSimGeometry_cfg.py tag=<prod>

• Reconstruction Geometry
  

   cmsRun Fireworks/Geometry/python/dumpRecoGeometry_cfg.py tag=<prod>

Viewing with cmsShow

Fireworks can display the simulation geometry and flag any overlaps. By default cmsShow takes cmsSimGeom-14.root from a tarball or CMSSW project area to display the geometry. If you want to use another file, use the --sim-geom-file <file-name> command-line option.
You can display the geometry by running cmsShow, creating a geometry table view, and selecting 3D view from the table view menu. Alternatively you can use pre-prepared configurations available in the CMSSW project area and cmsShow tarball.

./cmsShow -c simGeo.fwc --sim-geom-file <geometry-file>

Moving over node hierarchy

In the default configuration all nodes are drawn up to specified visibility depth. Instead of swiching visibility off for the subtestectors which can clutter a view, you can move top node to the subdetector yoou want to investigate. Top node setting is saved and restored in Fireworks configuration file.

All children visibility On/Off

Geometry table popup menu has an option for switching visibility of all child nodes. This is in particular useful for volumes with large number of daughter nodes.

Visibility depth

Value of default visibility depth level in cmsShow is 3. It is intentionally set low to prevent rendering of too many nodes.

Filter Material

Fireworks also has an option to draw nodes which match given material or shape. In simulation geometry it is large variety of materials. In TGeo reco geometry material is set only to define color and has a name matching a detector name.

Checking overlaps

Overlaps can be displayed with Overlap table view. It makes sense to trace overlaps only in simulation geometry since reco geometry no concept of mother volumes.

./cmsShow -c overlaps.fwc 

Presentations

The Fireworks geometry capability was presented at the 2012 CHEP conference:

• Displaying of simulation geometry in Fireworks (CHEP 2012)
• poster (CHEP 2012)

Review status

Reviewer/Editor and Date (copy from screen)	Comments
AntonioMorelosPineda - 16 Apr 2013	Upgrade to workbook style
AljaMrakTadel -11 Jul 2012	Created.

Responsible: AljaMrakTadel
Last reviewed by: AntonioMorelosPineda - 16 Apr 2013