Geometry extract

[matevz]

Hey Rok!

I think you need ExpandIntoListTreesRecursively() otherwise it will only load top-levels as Eve objects.
https://root.cern/doc/v612/classTEveGeoNode.html#ac3fb5e4164d598e037476d91298b71b9

You are getting me worried with the ALICE geometry there, this will probably get huge. There are ways of extracting geo shapes and matrices for specific geo paths on the fly, out of TGeo geometry – there was a post here about that here, let me dig it up (see the test2.C macro there):

Looking for better Eve examples using TGeoNode

I’m looking for some more complex examples of TGeoNode usage within an Eve application, and the ROOT tutorials don’t seem to provide very much in this area. All I find in tutorials/eve from ROOT 6.18 is the following: $ grep TGeoNode * geom_alice_its.C:#include "TGeoNode.h" geom_alice_its.C: TGeoNode* node = gGeoManager->GetTopVolume()->FindNode("ITSV_1"); geom_alice_its.C:TEveGeoNode* descend_extract(TGeoNode* node) geom_default.C: TGeoNode* node1 = gGeoManager->GetTopVolume()->FindNode("…

Cheers,
Matevz