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Forum: Geometry
Re: None Local to Global... again (Nathaniel Tagg)
Re: None Re: Local to Global... again (John Allison)
Re: None Re: Local to Global... again (Nathaniel Tagg)
Re: None Re: Local to Global... again (Vladimir IVANTCHENKO )
Date: 02 Apr, 2007
From: Nathaniel Tagg <tagg@minos.phy.tufts.edu>

Hi,
If you're referring to http://geant4.web.cern.ch/geant4/support/ 
faq.shtml#a-geom-4
I've looked at it, but it applies only to backtracking coordinates as  
you are tracking a particle.

I want to go from local to global at detector construction time, so I  
can place a field.

---Nathaniel

On Apr 2, 2007, at 8:30 AM, Vladimir IVANTCHENKO wrote:

> On Mon, 2 Apr 2007, Nathaniel Tagg wrote:
>
>> *** Discussion title: Geometry
>> Email replies to PublicHyperNews@slac.stanford.edu must include:
>>   In-Reply-To: <"/geometry/706/3/1"@geant4-hn.slac.stanford.edu>
>>   Subject: ...change this to be about your reply.
>>
>> OK, can someone briefly tell me why this doesn't work/isn't a good  
>> idea?
>>
>> myLogicalVol->GetPhysicalVolume()->GetTransfomration()
>>
>> myLogicalVol->GetMother()->GetPhysicalVolume()->GetTransformation()
>>
>> ... etc until the world volume ...
>>
>> and then add the transformations?
>>
>> This crazy; what I'm hearing is that the only way to navigate the
>> geometry at construction time is to build my own geometry manager to
>> track the placements of objects myself. Is this right? If so, isn't
>> there a need for a generic tool of this kind?
>>
>> --Nathaniel
>>
>
> Please, visit FAQ page of Geant4.
>
> VI

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