Detector Geometry Description

• Number of detector subsystems : 19 (not all necessarily included in a particular configuration)

• Custom macro “geometry language” (*.g files)

  • based on the obscure Fortran preprocessor called Mortran
  • ideally suited for application-specific Fortran code structuring
  • in many cases, helps circumvent limitations of Fortran
  • can be of help with the GEANT learning curve
  • has been successfully used in a number of projects

• 11+ k lines of geometry code, largely user maintained

• volume numbering maps (not part of the geometry per se) are maintained separately in “g2t” files.

  • Difficult to version and maintain.

Notes: