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Pythia8.cpp
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1 // This file is part of the Acts project.
2 //
3 // Copyright (C) 2019 CERN for the benefit of the Acts project
4 //
5 // This Source Code Form is subject to the terms of the Mozilla Public
6 // License, v. 2.0. If a copy of the MPL was not distributed with this
7 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 
18 #include <Acts/Utilities/Units.hpp>
19 
20 #include <cstdlib>
21 #include <memory>
22 
23 using namespace Acts::UnitLiterals;
24 using namespace ActsExamples;
25 
26 int main(int argc, char* argv[]) {
27  // setup and parse options
28  auto desc = Options::makeDefaultOptions();
33  auto vm = Options::parse(desc, argc, argv);
34  if (vm.empty()) {
35  return EXIT_FAILURE;
36  }
37 
38  auto logLevel = Options::readLogLevel(vm);
40  Sequencer sequencer(sequencerCfg);
41 
42  // basic services
43  auto rnd =
44  std::make_shared<RandomNumbers>(Options::readRandomNumbersConfig(vm));
45 
46  // event generation w/ internal pythia8 instance
48  evgen.outputParticles = "particles";
49  evgen.randomNumbers = rnd;
50  sequencer.addReader(std::make_shared<EventGenerator>(evgen, logLevel));
51 
52  // print generated particles
53  if ((logLevel == Acts::Logging::VERBOSE) or
54  (logLevel == Acts::Logging::DEBUG)) {
56  print.inputParticles = evgen.outputParticles;
57  sequencer.addAlgorithm(std::make_shared<PrintParticles>(print, logLevel));
58  }
59 
60  // different output modes
61  auto outputDir = ensureWritableDirectory(vm["output-dir"].as<std::string>());
62  if (vm["output-csv"].as<bool>()) {
63  CsvParticleWriter::Config csvWriter;
64  csvWriter.inputParticles = evgen.outputParticles;
65  csvWriter.outputDir = outputDir;
66  csvWriter.outputStem = "particles";
67  sequencer.addWriter(
68  std::make_shared<CsvParticleWriter>(csvWriter, logLevel));
69  }
70  if (vm["output-root"].as<bool>()) {
71  RootParticleWriter::Config rootWriter;
72  rootWriter.inputParticles = evgen.outputParticles;
73  rootWriter.filePath = joinPaths(outputDir, "particles.root");
74  sequencer.addWriter(
75  std::make_shared<RootParticleWriter>(rootWriter, logLevel));
76  }
77 
78  return sequencer.run();
79 }