Difference: VisuDet (3 vs. 4)

Revision 42014-06-24 - DanProtopopescu

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META TOPICPARENT	name="WebHome"

Visualising a detector geometry

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There are various formats used to describe a detector geometry. The info in the compact.xml is not enough to describe the detector - drivers are needed to expand info from the XML and create all the volumes. Mokka or SLIC for example create ways of inputting objects in Geant4 without programming volumes in Geant4.

Changed:

<
<

GDML (Geant4, Root)

>
>

GDML (Geant4, ROOT)

LCDD (GeomConverter) - LCDD is GDML augmented by sensitive detector info including cell id specs.
HEPREP
XML - all of the above are XML formats

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geoConverter -compact2lcdd -input compact.xml -output dd4hep.lcdd gGeoManager->Export(“clic-crr.gdml”)

Changed:

<
< or use Export(“clic-crr.root”) to export in root format.

>
> or use Export(“clic-crr.root”) to export in ROOT format.

From Mokka, one can create a GDML file with

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Visualisation

Changed:

<
< To visualise a GDML file in Root: open Root, then

>
> To visualise a GDML file in ROOT: open ROOT, then

TGeoManager::Import(“myclic.gdml”);
gGeoManager->GetTopVolume()->Draw(“ogl”);

Changed:

<
< where ogl selects the OpenGL engine.

>
> where ogl selects the OpenGL engine. All figures from this section were produced like that.

From SLIC, do

Added:

>
> source ~/ilc_soft/slic/v03-01-06/init_ilcsoft.sh

slic -g clic-sid_cdr.lcdd -n

Changed:

<
< to get a Geant4 prompt, i.e. a Geant4 interface with the geometry loaded; use commands like /vis/open OGL ... etc. to visualise the geometry.

>
>

to get a Geant4 prompt, i.e. a Geant4 interface with the geometry loaded; use Geant4 commands like to visualise the geometry:

Idle> /vis/open OGL
Idle> /vis/scene/create 
Idle> /vis/drawVolume
Idle> /vis/viewer/set/viewpointThetaPhi 60 45
Idle> /vis/viewer/set/background white

which, with this

geometry, will display something like this:

From Mokka, one can visualise the DB geometry via Geant4 as above. See this example.

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java -jar GeomConverter-2.4-bin.jar

Added:

>
>

META FILEATTACHMENT	attachment="slic-view.png" attr="" comment="SLIC/Geant4 view of the clic_sid_cdr geometry" date="1403618263" name="slic-view.png" path="slic-view.png" size="43781" user="DanProtopopescu" version="1"

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