1 / 5

Status of GDML support in ROOT

Status of GDML support in ROOT. A.Gheata SFT group meeting, June 2, 2014. What iS GDML?. Geometry Description Markup Language A pplication - independent geometry description format based on XML GEANT4 geometry persistent format Evolved in parallel with G4 geometry

roman
Télécharger la présentation

Status of GDML support in ROOT

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Status of GDML support in ROOT A.Gheata SFT group meeting, June 2, 2014

  2. What iS GDML? • Geometry Description Markup Language • Application-independent geometry description format based on XML • GEANT4 geometry persistent format • Evolved in parallel with G4 geometry • Latest release: GDML_3_1_0 from December 2013 • Initially developed by several people (mainly R. Chytracek and W. Pokorsky), now maintained by Witold • XML schema + bindings with GEANT4 and ROOT • G4 binding integrated in the toolkit since version 9.2 • Built optionally: XERCESROOT variable pointing to XercesC parser library, G4LIB_BUILD_GDML=1 • ROOT binding integrated in $ROOTSYS/geom/gdml • Automatic TGeoManager::Export(“.gdml”), but requires configuring with: --enable-gdml

  3. Support in ROOT • GDML as exchange format between GEANT4 and ROOT geometries • Geometries are alike, the common denominator schema to be supported • GDML parser (C++) + writer (Python script) • Ben Lloyd + Witold, end 2006 • TGDMLWrite C++ class re-written • Anton Pytel, Nov. 2011 • Including several fixes and improvements • Other contributors • D. Kruse, A.Gheata – ellipsoid support • A. Gheata – support for isotopes • Several people cotributed with fixes

  4. Missing features • Usage of constants and variables </define> • <constant> and <variable> keywords ignored <entity> not understood • Usage of loops, used to make geometry definition readable and less tedious • <loop for> • Usage of xml nodes across different files (ENTITY statement) • E.g. materials definition or different detectors in separate file • Some of the geometry solids or features which are not supported by ROOT • Would require the development of the ROOT correspondents • User requests • Long-standing ROOT-3347: GDML - constants, multiple files, fraction, unexpected end of file & ENTITY • Recent requests on roottalk

  5. Open to discussion • Approach • To fix: start from existing G4GDMLParser and introduce support for existing GDML schema in TGDMLParse (where possible) • To continue: synchronize adoption of new developments in ROOT • Coordination between ROOT and GEANT4 projects • Timeline • This is rather urgent since it blocks several people in using ROOT geometry features (graphics, checker, event display, …) when starting from a more advanced GDML description. • 1-2 months ? • Resources • I can contribute only partially due to priorities in other projects • Summer student (rather late now), part of the work of a technical student?

More Related