sPHENIX tracking discussion

[Anthony Frawley <afrawley AT fsu.edu>]

For Martin,

Code snippets for adding a TrkrHit to the node tree.

See examples in the HitReco modules in: offline/simulation/g4simulation/

             g4Intt, g4mvtx, g4tpc, g4micromegas

Ping me if you have questions.

Cheers

Tony

-----------------------------

Assumes the TrkrHitsetContainer is on the node tree, and that hitsetcontainer is a pointer to it.

For INTT:

     //Need ladder index in phi, sensor index in z

    TrkrDefs::hitsetkey hitsetkey = InttDefs::genHitSetKey(sphxlayer, ladder_z_index, ladder_phi_index, crossing);

      // Use existing hitset or add new one if needed

      TrkrHitSetContainer::Iterator hitsetit = hitsetcontainer->findOrAddHitSet(hitsetkey);

      // generate the key for this hit

      TrkrDefs::hitkey hitkey = InttDefs::genHitKey(zbin, phibin);

      // See if this hit already exists

      TrkrHit *hit = hitsetit->second->getHit(hitkey);

      if (!hit)

      {

        // Otherwise, create a new one

      hit = new TrkrHitv2();

        hitsetit->second->addHitSpecificKey(hitkey, hit);

      }

      // Either way, add the energy to it

      hit->addEnergy(energy);

Changes for MVTX:

      // Need stave index, chip number in stave, strobe

      TrkrDefs::hitsetkey hitsetkey = MvtxDefs::genHitSetKey(sphxlayer, stave, chip, strobe);

      TrkrDefs::hitkey = MvtxDefs::genHitKey(column, row);

Changes for TPC:

    // Need layer, sector, side

      TrkrDefs::hitsetkey hitsetkey = TpcDefs::genHitSetKey(sphxlayer, sector, side);

      TrkrDefs::hitkey = TpcDefs::genHitKey(tbin, phibin);

Changes for Micromegas:

     // layer, segmentation type (phi or z orientation), strip

     TrkrDefs::hitsetkey hitsetkey = MicromegasDefs::genHitSetKey(sphxlayer, segmentation type, tile);

      TrkrDefs::hitkey = MvtxDefs::genHitKey(strip);