[VMC] VMC update

From: Ivana Hrivnacova (Ivana.Hrivnacova@cern.ch)
Date: Wed Jul 23 2003 - 10:33:14 MEST


 Dear colleagues,

 See below a short description of the update
 of VMC in the last release of root (3.05/06)
 and the geant3+_vmc and geant4_vmc modules.
 The new versions are available from:
 http://root.cern.ch/root/vmc/VirtualMC.html

 Best regards,

 Ivana

 -----

 VMC 
  - new abstract class TVirtualMCGeometry
    - defines only VMC functions for building/accesing geometry
  - new class TGeoMCGeometry - implementation of VMC functions for
    building/accesing geometry for TGeo
  - renaming of functions in TVirtualMCStack
    (backward incompatible)

 Examples
  - stack classes updated for changes of  TVirtualMCStack (update to 
    root 3.05/06)
  - E01 example - added functions for building geometry via TGeo
  
 Geant3
  - pro version (0.3) - update to root 3.05/06 
  - development version (0.4) of geant3 with TGeo geometry - provided 
    in tar file
 
 Geant4 VMC 
  - version 1.0
  - update to root 3.05/06, geant4 5.2
  - included roottog4 convertor - enables to define G4 geometry via TGeo
  - g4toxml convertor classes in separated library
  
 Status of root->g4 geometry convertor:
 The first released version of convertor has the following
 limitations:
 - divided volumes are converted via simple G4PVPlacements
   - can be memory consuming in case of huge use of divisions
 - Boolean volumes are not yet supported
 - MANY positions of volumes are not supported
 
 The divisions will be improved with G4 6.0 release (in december),
 when divisions should be directly supported by G4;
 the support for Boolean volumes is just a question of priorities
 and MANY positions are not going to be supported (as G4 itself
 does not support this option).  
 
==============================================================
e-mail:  Ivana.Hrivnacova@cern.ch
address: Institut Physique Nucleaire, 91406 Orsay, France
phone:   (33) 01 69 15 65 94
==============================================================



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