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gGeoManager existing? [message #5241]

Thu, 18 October 2007 09:50

Tobias Stockmanns
Messages: 489
Registered: May 2007

first-grade participant

From: *ikp.kfa-juelich.de

Dear pandaRooters,

I am looking for a way to figure out if a GeoManager is existing in a root session or not without crashing the program.

Unfortunately I have not found anything up to now, so I wonder if one of you can help me?

Looking forward for a positive reply,

Tobias

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Re: gGeoManager existing? [message #5249 is a reply to message #5241]

Thu, 18 October 2007 13:33

Mohammad Al-Turany
Messages: 518
Registered: April 2004
Location: GSI, Germany

first-grade participant

From: *gsi.de

Hallo Tobias,
There is two ways to do this:

1. if you know the name of the TGeoManager object, you can use:

gROOT->FindObjectAny("ObjectName")

this will return a pointer to TGeo if it exist or a zero if not.
in case of PandaRoot it is always created with the default name "CBMGeom".

2. In case you do not no the name, you can call:

gROOT->GetListOfGeometries()

which will return you a TSeqCollection of existing geometries (TGeoManager objects) which you can check if it is empty or has some entries which will be the existing geometries.

regards

Mohammad

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Re: gGeoManager existing? [message #5250 is a reply to message #5249]

Thu, 18 October 2007 14:11

Tobias Stockmanns
Messages: 489
Registered: May 2007

first-grade participant

From: *ikp.kfa-juelich.de

Dear Mohammad,

thank you for your fast reply. I will try the options.

Cheers,

Tobias

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