Re: Re-positioning volumes in geometry

Hi Andre,

On Wed, 2006-11-15 at 14:42 -0500, Andre Lebedev wrote:
> Hello, ROOTers.
>
> Can I reposition a volume and change its dimensions in geometry after it
> has been created with
> gGeoManager->MakeTube()
> and inserted through
> TGeoVolume::AddNode(...)
>
> The issue is that I have a default geometry for the experiment and a few
> volumes are repositioned depending on the run.

A better option, is to keep the `default' geometry, and then do perturbations of that geometry by using `TGeoPhysicalNode::Align'. `TGeoPhysicalNode' is defined by `TGeoManager::MakePhysicalNode(name)'. This can also be done _after_ closing the geometry.

This approach is used by ALICE.

Yours,

-- 
 ___  |  Christian Holm Christensen 
  |_| |  -------------------------------------------------------------
    | |  Address: Sankt Hansgade 23, 1. th.  Phone:  (+45) 35 35 96 91
     _|           DK-2200 Copenhagen N       Cell:   (+45) 24 61 85 91
    _|            Denmark                    Office: (+45) 353  25 404
 ____|   Email:   cholm_at_nbi.dk               Web:    www.nbi.dk/~cholm
 | |