[Fwd: Re: Re-positioning volumes in geometry]

Sorry, I forgot to reply all.
Andrei

attached mail follows:

Hi Andre,

You can do this as a patch to the initial geometry. Suppose you have this in a file:

    TGeoManager *geom = TGeoManager::Import("orig.root");    // Supposing you know the geomety path to the node representing your positioned tube:

    TGeoPhysicalNode * phnode =
geom->MakePhysicalNode("/TOP_1/.../MyTUBE_1");

    TGeoTube *new_tube = new TGeoTube("newTUBE", new_params...);     TGeoMatrix *new_matrix = new ... // define the new local positioning matrix for your tube (with respect to its mother)

    pnode->Align(new_matrix, new_tube);

You are done...

Andrei

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.
>
> Thanks,
> Andre.
>
>
Received on Thu Nov 16 2006 - 13:47:20 MET