sequential example chain - acts-project/traccc GitHub Wiki

Sequential example

A first sequential example chain can be found as examples/seq_example.cpp. It reads in data produced with the ActsExamplessetup and itsCsvWriter/Reader` reader infrastructure.

The program flow is as follows:

- loop over events:
-- loop over modules:
     - run connect component labeling (ccl) per module 
     - run measurement (mc) creation on output sets of (ccl) per module
     - run spacepoint (sp) formation on output measuremetns of mc 
-- run seeing (not yet implemented)

The algorithmic code is concentrated in the following three lines:

            // The algorithmic code part: start
            auto clusters = cc(cells);
            auto measurements = mt(clusters);
            auto spacepoints = sp(measurements);
            // The algorithmnic code part: end

TrackML Pixel detector

The data of the trackml pixel detector and the detector description itself is located in data/tml_pixels and data/tml_detector, respectively. There are 10 events with an average of 200 pile-up interactions.

To execute the full dataset, one needs to run

./seq_example tml_detector/trackml-detector.csv tml_pixels 10
Running ./seq_exammple tml_detector/trackml-detector.csv tml_pixels 10
==> Statistics ...
- read    2041344 cells from 38784 modules
- created 380554 clusters.
- created 380554 measurements.
- created 380554 space points.

It will create output files with measurements and space points, a nice visual validation is that the created measurements are nicely contained with the dimensions of the TrackML pixel modules:

Finally, a visual view of the TrackML pixel barrel in xy: