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[ALICE3] TRK: allow ACTS clustering #15174

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[ALICE3] TRK: allow ACTS clustering #15174

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[ALICE3] TRK: allow ACTS clustering
njacazio Mar 17, 2026
b306caf
Add ACTS clusterer
njacazio Mar 17, 2026
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22 changes: 20 additions & 2 deletions Detectors/Upgrades/ALICE3/TRK/reconstruction/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -9,10 +9,16 @@
# granted to it by virtue of its status as an Intergovernmental Organization
# or submit itself to any jurisdiction.

if(Acts_FOUND)
set(actsTarget Acts::Core)
endif()

o2_add_library(TRKReconstruction
TARGETVARNAME targetName
SOURCES src/TimeFrame.cxx
src/Clusterer.cxx
$<$<BOOL:${Acts_FOUND}>:src/ClustererACTS.cxx>
$<$<BOOL:${Acts_FOUND}>:src/TrackerACTS.cxx>
PUBLIC_LINK_LIBRARIES
O2::ITStracking
O2::GPUCommon
Expand All @@ -27,11 +33,23 @@ o2_add_library(TRKReconstruction
O2::DataFormatsITS
O2::TRKSimulation
nlohmann_json::nlohmann_json
${actsTarget}
PRIVATE_LINK_LIBRARIES
O2::Steer
TBB::tbb)

if(Acts_FOUND)
target_compile_definitions(${targetName} PUBLIC O2_WITH_ACTS)
endif()

set(dictHeaders include/TRKReconstruction/TimeFrame.h
include/TRKReconstruction/Clusterer.h)

if(Acts_FOUND)
list(APPEND dictHeaders include/TRKReconstruction/ClustererACTS.h
include/TRKReconstruction/TrackerACTS.h)
endif()

o2_target_root_dictionary(TRKReconstruction
HEADERS include/TRKReconstruction/TimeFrame.h
include/TRKReconstruction/Clusterer.h
HEADERS ${dictHeaders}
LINKDEF src/TRKReconstructionLinkDef.h)
22 changes: 11 additions & 11 deletions Detectors/Upgrades/ALICE3/TRK/reconstruction/include/TRKReconstruction/Clusterer.h
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Original file line number Diff line number Diff line change
Expand Up @@ -161,17 +161,17 @@ class Clusterer
};
//----------------------------------------------

void process(gsl::span<const Digit> digits,
gsl::span<const DigROFRecord> digitROFs,
std::vector<o2::trk::Cluster>& clusters,
std::vector<unsigned char>& patterns,
std::vector<o2::trk::ROFRecord>& clusterROFs,
const ConstDigitTruth* digitLabels = nullptr,
ClusterTruth* clusterLabels = nullptr,
gsl::span<const DigMC2ROFRecord> digMC2ROFs = {},
std::vector<o2::trk::MC2ROFRecord>* clusterMC2ROFs = nullptr);

private:
virtual void process(gsl::span<const Digit> digits,
gsl::span<const DigROFRecord> digitROFs,
std::vector<o2::trk::Cluster>& clusters,
std::vector<unsigned char>& patterns,
std::vector<o2::trk::ROFRecord>& clusterROFs,
const ConstDigitTruth* digitLabels = nullptr,
ClusterTruth* clusterLabels = nullptr,
gsl::span<const DigMC2ROFRecord> digMC2ROFs = {},
std::vector<o2::trk::MC2ROFRecord>* clusterMC2ROFs = nullptr);

protected:
int mNHugeClus = 0;
std::unique_ptr<ClustererThread> mThread;
std::vector<int> mSortIdx; ///< reusable per-ROF sort buffer
Expand Down
43 changes: 43 additions & 0 deletions Detectors/Upgrades/ALICE3/TRK/reconstruction/include/TRKReconstruction/ClustererACTS.h
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Original file line number Diff line number Diff line change
@@ -0,0 +1,43 @@
// Copyright 2019-2026 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.

/// \file ClustererACTS.h
/// \brief Definition of the TRK cluster finder

#ifndef ALICEO2_TRK_CLUSTERERACTS_H
#define ALICEO2_TRK_CLUSTERERACTS_H

#include "TRKReconstruction/Clusterer.h"

namespace o2::trk
{

class GeometryTGeo;

class ClustererACTS : public Clusterer
{
public:
void process(gsl::span<const Digit> digits,
gsl::span<const DigROFRecord> digitROFs,
std::vector<o2::trk::Cluster>& clusters,
std::vector<unsigned char>& patterns,
std::vector<o2::trk::ROFRecord>& clusterROFs,
const ConstDigitTruth* digitLabels = nullptr,
ClusterTruth* clusterLabels = nullptr,
gsl::span<const DigMC2ROFRecord> digMC2ROFs = {},
std::vector<o2::trk::MC2ROFRecord>* clusterMC2ROFs = nullptr) override;

private:
};

} // namespace o2::trk

#endif
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