REST_ValidateGeometry tool to check geometry of GDML files

RESTFramework
1

Hi everyone,

For simplicity I am using the basic example found here.
I want to check this geometry for possible overlaps, using the macro ‘REST_ValidateGeometry’.

But I got the following error

root [0] REST_ValidateGeometry("box.gdml")
Info in <TGeoManager::Import>: Reading geometry from file: box.gdml
Info in <TGeoManager::TGeoManager>: Geometry GDMLImport, Geometry imported from GDML created
Error in <TXMLEngine::ParseFile>: Unexpected end of xml file
Error in <TXMLEngine::ParseFile>: Error include external XML file at line 27
Error in <TGeoManager::Import>: Cannot open file
Error in <TGeoManager::CheckOverlaps>: Top node not set
(int) 0

The line 27 corresponds to the beginning of the <solid> section in the box.gdml file.
I tested with other geometries and had the same problem, each time TXMLEngine::ParseFile pointing to the line corresponding to solid definitions.

I opened the REST_ValidateGeometry.C file which is rather simple, but I couldn’t say if the problem comes from here.

Usually, do you use this macro to validate your geometry or do you use another tool?

Thanks for your help,
Cloe

2

Actually the macro you are trying to use was obsolete.

The reason is that before we were just reading plain GDML files, while now we do a re-interpretation of the GDML that allows us to introduce system variables such as ${GDML_PRESSURE} or include files that are placed at remote locations such as the https://rest-for-physics.github.io/materials/rest.xml that we use in our geometry definitions.

In the following PR REST_ValidateGeometry.C. Updating to new GDML REST format by jgalan · Pull Request #383 · rest-for-physics/framework · GitHub you will see the additional change is a class TRestGDMLParser that is responsible to parse the GDML file and interpret system and download http files. The result file is placed at HOME/.rest/ which is the final GDML file interpreted by ROOT.

Plz, could you approve the PR?

3

I am not sure if there are other interesting tests that can be done. Perhaps @lobis or @juanan318 know a bit more about.

4

Hi,
Thanks for your explanation, it makes more sense now.
Concerning the geometry check, I found some nice package written in Python as pyg4ometry, but maybe there is something in REST that could be interesting.

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