sPHENIX tracking discussion

[Christof E Roland <cer AT mit.edu>]

Hi Everybody,

thanks a lot for the fix. 

Everything works again. 

Cheers

   Christof

On 29.03.2017, at 20:09, Frawley, Anthony <afrawley AT fsu.edu> wrote:

Hi Christof,

This is fixed in the latest build (new.4) that was completed at around 1:30 pm today.

Cheers

Tony

---

From: sPHENIX-tracking-l <sphenix-tracking-l-bounces AT lists.bnl.gov> on behalf of Christof E Roland <cer AT mit.edu>
Sent: Wednesday, March 29, 2017 12:46 AM
To: sphenix-tracking-l AT lists.bnl.gov
Subject: [Sphenix-tracking-l] How to access G4CELL_SVTX ?

 

Hi Everybody, 

I just updated to the latest master version of coresoftware and the 
PHG4TrackKalmanFitter is broken. It exits with the following error:
PHG4TrackKalmanFitter.C:783: ERROR: Can't find node G4CELL_SVTX

I assume this is related to the recent retooling of the PHG4CylinderCell
classes. In the KalmanFitter and the Combinatorial Track finding
the CylinderCellMaps were used to access the sensor positions
and angles for a given hit. See code snippet below. 
Could someone remind me what the replacement code with the 
new PHG4Cell model is supposed to look like?

Thanks a lot

   Christof

code that needs to be replaced: 

        PHG4CylinderCell_MAPS* cell =
                                        (PHG4CylinderCell_MAPS*) cells_maps->findCylinderCell(
                                                        hit->get_cellid());
                        int stave_index = cell->get_stave_index();
                        int half_stave_index = cell->get_half_stave_index();
                        int module_index = cell->get_module_index();
                        int chip_index = cell->get_chip_index();

                        double ladder_location[3] = { 0.0, 0.0, 0.0 };
                        PHG4CylinderGeom_MAPS *geom =
                                        (PHG4CylinderGeom_MAPS*) geom_container_maps->GetLayerGeom(
                                                        layer);
                        // returns the center of the sensor in world coordinates - used to get the ladder phi location
                        geom->find_sensor_center(stave_index, half_stave_index,
                                        module_index, chip_index, ladder_location);
                        //n.Print();
                        n.SetXYZ(ladder_location[0], ladder_location[1], 0);
                        n.RotateZ(phi_tilt[layer]);
 
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