algorithms/tracking/TrackSeeding.h

0001 // SPDX-License-Identifier: LGPL-3.0-or-later
0002 // Copyright (C) 2023  - 2025 Joe Osborn, Dmitry Romanov, Wouter Deconinck// Created by Dmitry Romanov
0003
0004 #pragma once
0005
0006 #include <Acts/EventData/Seed.hpp>
0007 #include <Acts/EventData/SpacePointContainer.hpp>
0008 #include <Acts/Seeding/SeedFilterConfig.hpp>
0009 #include <Acts/Seeding/SeedFinderConfig.hpp>
0010 #include <Acts/Seeding/SeedFinderOrthogonalConfig.hpp>
0011 #include <Acts/Utilities/HashedString.hpp>
0012 #include <Acts/Utilities/Holders.hpp>
0013 #if __has_include(<ActsExamples/EventData/SpacePointContainer.hpp>)
0014 #include <ActsExamples/EventData/SpacePointContainer.hpp>
0015 #else
0016 #include <any>
0017 #include <stdexcept>
0018 #endif
0019 #include <algorithms/algorithm.h>
0020 #include <edm4eic/TrackParametersCollection.h>
0021 #include <edm4eic/TrackSeedCollection.h>
0022 #include <edm4eic/TrackerHitCollection.h>
0023 #include <cmath>
0024 #include <iterator>
0025 #include <memory>
0026 #include <optional>
0027 #include <string>
0028 #include <string_view>
0029 #include <tuple>
0030 #include <utility>
0031 #include <variant>
0032 #include <vector>
0033
0034 #include "ActsGeometryProvider.h"
0035 #include "OrthogonalTrackSeedingConfig.h"
0036 #include "SpacePoint.h"
0037 #include "algorithms/interfaces/ActsSvc.h"
0038 #include "algorithms/interfaces/WithPodConfig.h"
0039
0040 namespace eicrecon {
0041
0042 #if !__has_include(<ActsExamples/EventData/SpacePointContainer.hpp>)
0043 /// Adapter to wrap a collection of space points for use with Acts::SpacePointContainer.
0044 /// This replaces ActsExamples::SpacePointContainer<T>, which was removed in Acts >= 46
0045 /// (see https://github.com/acts-project/acts/pull/5088).
0046 template <typename collection_t> class SpacePointContainerAdapter {
0047 public:
0048   using CollectionType = collection_t;
0049   using ValueType      = typename CollectionType::value_type;
0050
0051   friend class Acts::SpacePointContainer<SpacePointContainerAdapter<collection_t>,
0052                                          Acts::detail::RefHolder>;
0053
0054   SpacePointContainerAdapter() = delete;
0055   explicit SpacePointContainerAdapter(CollectionType& container) : m_storage(container) {}
0056
0057 private:
0058   std::size_t size_impl() const { return storage().size(); }
0059   float x_impl(std::size_t idx) const { return storage()[idx]->x(); }
0060   float y_impl(std::size_t idx) const { return storage()[idx]->y(); }
0061   float z_impl(std::size_t idx) const { return storage()[idx]->z(); }
0062   float varianceR_impl(std::size_t idx) const { return storage()[idx]->varianceR(); }
0063   float varianceZ_impl(std::size_t idx) const { return storage()[idx]->varianceZ(); }
0064   const ValueType& get_impl(std::size_t idx) const { return storage()[idx]; }
0065   std::any component_impl(Acts::HashedString /*key*/, std::size_t /*n*/) const {
0066     throw std::runtime_error(
0067         "SpacePointContainerAdapter does not support detailed double measurement "
0068         "information (useDetailedDoubleMeasurementInfo). Use Acts::SpacePointContainer2 "
0069         "if this feature is required.");
0070   }
0071
0072   const CollectionType& storage() const { return *m_storage; }
0073
0074   Acts::detail::RefHolder<CollectionType> m_storage;
0075 };
0076 #endif
0077
0078 using TrackSeedingAlgorithm = algorithms::Algorithm<
0079     algorithms::Input<edm4eic::TrackerHitCollection>,
0080     algorithms::Output<edm4eic::TrackSeedCollection, edm4eic::TrackParametersCollection>>;
0081
0082 class TrackSeeding : public TrackSeedingAlgorithm,
0083                      public WithPodConfig<OrthogonalTrackSeedingConfig> {
0084 public:
0085 #if __has_include(<ActsExamples/EventData/SpacePointContainer.hpp>)
0086   using SpacePointContainerType = ActsExamples::SpacePointContainer<std::vector<const SpacePoint*>>;
0087 #else
0088   using SpacePointContainerType = SpacePointContainerAdapter<std::vector<const SpacePoint*>>;
0089 #endif
0090   using proxy_type =
0091       typename Acts::SpacePointContainer<SpacePointContainerType,
0092                                          Acts::detail::RefHolder>::SpacePointProxyType;
0093
0094   TrackSeeding(std::string_view name)
0095       : TrackSeedingAlgorithm{name,
0096                               {"inputTrackerHits"},
0097                               {"outputTrackParameters"},
0098                               "create track seeds from tracker hits"} {}
0099
0100   void init() final;
0101   void process(const Input&, const Output&) const final;
0102
0103 private:
0104   const algorithms::ActsSvc& m_actsSvc{algorithms::ActsSvc::instance()};
0105   const std::shared_ptr<const ActsGeometryProvider> m_geoSvc{m_actsSvc.acts_geometry_provider()};
0106
0107   Acts::SeedFilterConfig m_seedFilterConfig;
0108   Acts::SeedFinderOptions m_seedFinderOptions;
0109   Acts::SeedFinderOrthogonalConfig<proxy_type> m_seedFinderConfig;
0110
0111   static int determineCharge(std::vector<std::pair<float, float>>& positions,
0112                              const std::pair<float, float>& PCA,
0113                              std::tuple<float, float, float>& RX0Y0);
0114   static std::pair<float, float> findPCA(std::tuple<float, float, float>& circleParams);
0115   static std::vector<const eicrecon::SpacePoint*>
0116   getSpacePoints(const edm4eic::TrackerHitCollection& trk_hits);
0117   std::optional<edm4eic::MutableTrackParameters>
0118   estimateTrackParamsFromSeed(const Acts::Seed<SpacePoint>& seed) const;
0119
0120   static std::tuple<float, float, float> circleFit(std::vector<std::pair<float, float>>& positions);
0121   static std::tuple<float, float> lineFit(std::vector<std::pair<float, float>>& positions);
0122 };
0123 } // namespace eicrecon