sPHENIX tracking discussion

[Anthony Frawley <afrawley AT fsu.edu>]

Hello David,

You can get the global position from the ActsGeometry utility class:

     m_tGeometry = findNode::getClass<ActsGeometry>(topNode, "ActsGeometry");

     Acts::Vector3 global  = m_tGeometry->getGlobalPosition(key, cluster);

Tony

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From: sPHENIX-tracking-l <sphenix-tracking-l-bounces AT lists.bnl.gov> on behalf of David Stewart via sPHENIX-tracking-l <sphenix-tracking-l AT lists.bnl.gov>
Sent: Thursday, December 1, 2022 7:04 AM
To: sphenix-tracking-l AT lists.bnl.gov <sphenix-tracking-l AT lists.bnl.gov>
Subject: [Sphenix-tracking-l] RE displaying hits in the TPC

 

Hi all,

I have a node tree with TrkrCluster's, which have their data according to local geometry. For diagnostic purposes, I should plot them with global geometry. Is there an easy way or existing utility to convert the phi coordinates (perhaps using the HitSetKey) from local to global? (TrkrDefs:: has functions like getPhiElement....)

Thanks, Christof, for pointing me to /phenix/u/bogui/data/Display. The macro prints from a tuple in global coordinates. The location also has a layer_info.text file. Is there a way to use this file to convert the TrkrCluster information (perhaps with the hitsetkey value) to convert phi to global? I'm ok for radius (given that hitsetkey gives the layer id), and Z because the binning is all from the same point for all Clusters.

Thanks very much,

 

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David Stewart

Postdoctoral Fellow | Department of Physics, Wayne State University