Re: TGeoXtru class in VMC

 Hi Emil,

 I will have a look at supporting this shape in VGM;  as it can be decomposed into set of general trapezoids,  there should not be a principal problem to pass it  to Geant4.  

 Best regards,

 Ivana

-- 
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e-mail:  Ivana.Hrivnacova_at_cern.ch
address: Institut Physique Nucleaire, 91406 Orsay, France
phone:   (33) 01 69 15 65 94
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On Fri, 24 Mar 2006, Emil Frlez wrote:



> 

>  Hello VMCtalkers,

> 

>  I have a question for ROOT/VMC developers.

>  I am re-writing my groups detector simulation

>  from Geant3 into Geant4. The best/most readable

>  option would be to use the TGeoXtru class that

>  is available in the current Root release.

>  (Our detector is a geodesic break-down

>  of sphere with regular pentagons and irregular

>  hexagons, that can be modelled as extruded polygons.

>  The alternative is more cumbersome - making

>  a single irregular hex out of 6 general

>  trapeziods.)

> 

>  But, as I can see, TGeoXtru geometry is not

>  yet included in root/vmc/src/TGeoMCGeometry.cxx

>  nor in vgm.2.07/packages//RootGM/source/solids -

>  when I try to interface my detector.root with

>  geant4, error results:

> 

> VGM info:   Importing shape: TGeoXtru

>     RootGM::Factory::ImportSolid: 

>     Unsupported shape type (shape 'TGeoXtru")

> *** Error: Aborting execution  ***

> 

>  So, my question: are the additions of new

>  primitive solid shapes coming soon to VMC?

> 

>                      Best Regards,

>                      Emil Frlez

> 

>