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ProtoTrackClassification.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 
10 
11 #include <algorithm>
12 
14 
16  const IndexMultimap<ActsFatras::Barcode>& hitParticlesMap,
17  const ProtoTrack& protoTrack,
18  std::vector<FW::ParticleHitCount>& particleHitCount) {
19  particleHitCount.clear();
20 
21  for (auto hitIndex : protoTrack) {
22  // find all particles that generate this hit
23  for (auto hitParticle : makeRange(hitParticlesMap.equal_range(hitIndex))) {
24  auto particleId = hitParticle.second;
25  // search for existing particle in the existing hit counts
26  auto isSameParticle = [=](const ParticleHitCount& phc) {
27  return (phc.particleId == particleId);
28  };
29  auto it = std::find_if(particleHitCount.begin(), particleHitCount.end(),
30  isSameParticle);
31  // either increase count if we saw the particle before or add it
32  if (it != particleHitCount.end()) {
33  it->hitCount += 1;
34  } else {
35  particleHitCount.push_back({particleId, 1u});
36  }
37  }
38  }
39 
40  // sort by hit count, i.e. majority particle first
41  auto compareHitCount = [](const ParticleHitCount& lhs,
42  const ParticleHitCount& rhs) {
43  return lhs.hitCount > rhs.hitCount;
44  };
45  std::sort(particleHitCount.begin(), particleHitCount.end(), compareHitCount);
46 }