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Propagator.h
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// Copyright 2019-2020 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 Propagator
/// \brief Singleton class for track propagation routines
/// \author ruben.shahoyan@cern.ch
#ifndef ALICEO2_BASE_PROPAGATOR_
#define ALICEO2_BASE_PROPAGATOR_
#include "GPUCommonRtypes.h"
#include "CommonConstants/PhysicsConstants.h"
#include "ReconstructionDataFormats/Track.h"
#include "ReconstructionDataFormats/DCA.h"
#include "ReconstructionDataFormats/TrackLTIntegral.h"
#include "DetectorsBase/MatLayerCylSet.h"
#ifndef GPUCA_GPUCODE
#include <array>
#include <string>
#endif
namespace o2
{
namespace parameters
{
class GRPObject;
class GRPMagField;
} // namespace parameters
namespace dataformats
{
class VertexBase;
}
namespace field
{
class MagFieldFast;
class MagneticField;
} // namespace field
namespace gpu
{
class GPUTPCGMPolynomialField;
}
namespace base
{
template <typename value_T>
class PropagatorImpl
{
public:
using value_type = value_T;
using TrackPar_t = track::TrackParametrization<value_type>;
using TrackParCov_t = track::TrackParametrizationWithError<value_type>;
enum class MatCorrType : int {
USEMatCorrNONE, // flag to not use material corrections
USEMatCorrTGeo, // flag to use TGeo for material queries
USEMatCorrLUT
}; // flag to use LUT for material queries (user must provide a pointer
static constexpr float MAX_SIN_PHI = 0.85f;
static constexpr float MAX_STEP = 2.0f;
GPUd() bool PropagateToXBxByBz(TrackParCov_t& track, value_type x,
value_type maxSnp = MAX_SIN_PHI, value_type maxStep = MAX_STEP, MatCorrType matCorr = MatCorrType::USEMatCorrLUT,
track::TrackLTIntegral* tofInfo = nullptr, int signCorr = 0) const;
GPUd() bool PropagateToXBxByBz(TrackParCov_t& track, TrackPar_t& linRef, value_type x,
value_type maxSnp = MAX_SIN_PHI, value_type maxStep = MAX_STEP, MatCorrType matCorr = MatCorrType::USEMatCorrLUT,
track::TrackLTIntegral* tofInfo = nullptr, int signCorr = 0) const;
GPUd() bool PropagateToXBxByBz(TrackPar_t& track, value_type x,
value_type maxSnp = MAX_SIN_PHI, value_type maxStep = MAX_STEP, MatCorrType matCorr = MatCorrType::USEMatCorrLUT,
track::TrackLTIntegral* tofInfo = nullptr, int signCorr = 0) const;
GPUd() bool propagateToX(TrackParCov_t& track, value_type x, value_type bZ,
value_type maxSnp = MAX_SIN_PHI, value_type maxStep = MAX_STEP, MatCorrType matCorr = MatCorrType::USEMatCorrLUT,
track::TrackLTIntegral* tofInfo = nullptr, int signCorr = 0) const;
GPUd() bool propagateToX(TrackParCov_t& track, TrackPar_t& linRef, value_type x, value_type bZ,
value_type maxSnp = MAX_SIN_PHI, value_type maxStep = MAX_STEP, MatCorrType matCorr = MatCorrType::USEMatCorrLUT,
track::TrackLTIntegral* tofInfo = nullptr, int signCorr = 0) const;
GPUd() bool propagateToX(TrackPar_t& track, value_type x, value_type bZ,
value_type maxSnp = MAX_SIN_PHI, value_type maxStep = MAX_STEP, MatCorrType matCorr = MatCorrType::USEMatCorrLUT,
track::TrackLTIntegral* tofInfo = nullptr, int signCorr = 0) const;
template <typename track_T>
GPUd() bool propagateTo(track_T& track, value_type x, bool bzOnly = false, value_type maxSnp = MAX_SIN_PHI, value_type maxStep = MAX_STEP,
MatCorrType matCorr = MatCorrType::USEMatCorrLUT, track::TrackLTIntegral* tofInfo = nullptr, int signCorr = 0) const
{
return bzOnly ? propagateToX(track, x, getBz(track.getXYZGlo()), maxSnp, maxStep, matCorr, tofInfo, signCorr) : PropagateToXBxByBz(track, x, maxSnp, maxStep, matCorr, tofInfo, signCorr);
}
GPUd() bool propagateToX(TrackParCov_t& track, TrackPar_t* linRef, value_type x, value_type bZ,
value_type maxSnp = MAX_SIN_PHI, value_type maxStep = MAX_STEP, MatCorrType matCorr = MatCorrType::USEMatCorrLUT,
track::TrackLTIntegral* tofInfo = nullptr, int signCorr = 0) const
{
return linRef ? propagateToX(track, *linRef, x, bZ, maxSnp, maxStep, matCorr, tofInfo, signCorr) : propagateToX(track, x, bZ, maxSnp, maxStep, matCorr, tofInfo, signCorr);
}
GPUd() bool PropagateToXBxByBz(TrackParCov_t& track, TrackPar_t* linRef, value_type x,
value_type maxSnp = MAX_SIN_PHI, value_type maxStep = MAX_STEP, MatCorrType matCorr = MatCorrType::USEMatCorrLUT,
track::TrackLTIntegral* tofInfo = nullptr, int signCorr = 0) const
{
return linRef ? PropagateToXBxByBz(track, *linRef, x, maxSnp, maxStep, matCorr, tofInfo, signCorr) : PropagateToXBxByBz(track, x, maxSnp, maxStep, matCorr, tofInfo, signCorr);
}
GPUd() bool propagateTo(TrackParCov_t& track, TrackPar_t* linRef, value_type x, bool bzOnly = false, value_type maxSnp = MAX_SIN_PHI, value_type maxStep = MAX_STEP,
MatCorrType matCorr = MatCorrType::USEMatCorrLUT, track::TrackLTIntegral* tofInfo = nullptr, int signCorr = 0) const
{
return bzOnly ? propagateToX(track, linRef, x, getBz(track.getXYZGlo()), maxSnp, maxStep, matCorr, tofInfo, signCorr) : PropagateToXBxByBz(track, linRef, x, maxSnp, maxStep, matCorr, tofInfo, signCorr);
}
template <typename track_T>
GPUd() bool propagateToAlphaX(track_T& track, value_type alpha, value_type x, bool bzOnly = false, value_type maxSnp = MAX_SIN_PHI, value_type maxStep = MAX_STEP, int minSteps = 1,
MatCorrType matCorr = MatCorrType::USEMatCorrLUT, track::TrackLTIntegral* tofInfo = nullptr, int signCorr = 0) const;
GPUd() bool propagateToAlphaX(TrackParCov_t& track, TrackPar_t* linRef, value_type alpha, value_type x, bool bzOnly = false, value_type maxSnp = MAX_SIN_PHI, value_type maxStep = MAX_STEP, int minSteps = 1,
MatCorrType matCorr = MatCorrType::USEMatCorrLUT, track::TrackLTIntegral* tofInfo = nullptr, int signCorr = 0) const;
template <typename track_T>
GPUd() bool propagateToR(track_T& track, value_type r, bool bzOnly = false, value_type maxSnp = MAX_SIN_PHI, value_type maxStep = MAX_STEP,
MatCorrType matCorr = MatCorrType::USEMatCorrLUT, track::TrackLTIntegral* tofInfo = nullptr, int signCorr = 0) const;
GPUd() bool propagateToDCA(const o2::dataformats::VertexBase& vtx, o2::track::TrackParametrizationWithError<value_type>& track, value_type bZ,
value_type maxStep = MAX_STEP, MatCorrType matCorr = MatCorrType::USEMatCorrLUT,
o2::dataformats::DCA* dcaInfo = nullptr, track::TrackLTIntegral* tofInfo = nullptr,
int signCorr = 0, value_type maxD = 999.f) const;
GPUd() bool propagateToDCABxByBz(const o2::dataformats::VertexBase& vtx, o2::track::TrackParametrizationWithError<value_type>& track,
value_type maxStep = MAX_STEP, MatCorrType matCorr = MatCorrType::USEMatCorrLUT,
o2::dataformats::DCA* dcaInfo = nullptr, track::TrackLTIntegral* tofInfo = nullptr,
int signCorr = 0, value_type maxD = 999.f) const;
GPUd() bool propagateToDCA(const o2::math_utils::Point3D<value_type>& vtx, o2::track::TrackParametrization<value_type>& track, value_type bZ,
value_type maxStep = MAX_STEP, MatCorrType matCorr = MatCorrType::USEMatCorrLUT,
std::array<value_type, 2>* dca = nullptr, track::TrackLTIntegral* tofInfo = nullptr,
int signCorr = 0, value_type maxD = 999.f) const;
GPUd() bool propagateToDCABxByBz(const o2::math_utils::Point3D<value_type>& vtx, o2::track::TrackParametrization<value_type>& track,
value_type maxStep = MAX_STEP, MatCorrType matCorr = MatCorrType::USEMatCorrLUT,
std::array<value_type, 2>* dca = nullptr, track::TrackLTIntegral* tofInfo = nullptr,
int signCorr = 0, value_type maxD = 999.f) const;
PropagatorImpl(PropagatorImpl const&) = delete;
PropagatorImpl(PropagatorImpl&&) = delete;
PropagatorImpl& operator=(PropagatorImpl const&) = delete;
PropagatorImpl& operator=(PropagatorImpl&&) = delete;
// Bz at the origin
GPUd() void updateField();
GPUd() value_type getNominalBz() const { return mNominalBz; }
GPUd() void setTGeoFallBackAllowed(bool v) { mTGeoFallBackAllowed = v; }
GPUd() bool isTGeoFallBackAllowed() const { return mTGeoFallBackAllowed; }
GPUd() void setMatLUT(const o2::base::MatLayerCylSet* lut) { mMatLUT = lut; }
GPUd() const o2::base::MatLayerCylSet* getMatLUT() const { return mMatLUT; }
GPUd() void setGPUField(const o2::gpu::GPUTPCGMPolynomialField* field) { mGPUField = field; }
GPUd() const o2::gpu::GPUTPCGMPolynomialField* getGPUField() const { return mGPUField; }
GPUd() void setNominalBz(value_type bz) { mNominalBz = bz; }
GPUd() bool hasMagFieldSet() const { return mField != nullptr; }
GPUd() value_type estimateLTFast(o2::track::TrackLTIntegral& lt, const o2::track::TrackParametrization<value_type>& trc) const;
GPUd() float estimateLTIncrement(const o2::track::TrackParametrization<value_type>& trc, const o2::math_utils::Point3D<value_type>& postStart, const o2::math_utils::Point3D<value_type>& posEnd) const;
#ifndef GPUCA_GPUCODE
static PropagatorImpl* Instance(bool uninitialized = false)
{
static PropagatorImpl instance(uninitialized);
return &instance;
}
static int initFieldFromGRP(const o2::parameters::GRPMagField* grp, bool verbose = false);
static int initFieldFromGRP(const o2::parameters::GRPObject* grp, bool verbose = false);
static int initFieldFromGRP(const std::string grpFileName = "", bool verbose = false);
#endif
GPUd() MatBudget getMatBudget(MatCorrType corrType, const o2::math_utils::Point3D<value_type>& p0, const o2::math_utils::Point3D<value_type>& p1) const;
GPUd() void getFieldXYZ(const math_utils::Point3D<float> xyz, float* bxyz) const;
GPUd() void getFieldXYZ(const math_utils::Point3D<double> xyz, double* bxyz) const;
GPUd() float getBz(const math_utils::Point3D<float> xyz) const;
GPUd() double getBz(const math_utils::Point3D<double> xyz) const;
private:
#ifndef GPUCA_GPUCODE
PropagatorImpl(bool uninitialized = false);
~PropagatorImpl() = default;
#endif
static constexpr value_type Epsilon = 0.00001; // precision of propagation to X
template <typename T>
GPUd() void getFieldXYZImpl(const math_utils::Point3D<T> xyz, T* bxyz) const;
template <typename T>
GPUd() T getBzImpl(const math_utils::Point3D<T> xyz) const;
const o2::field::MagFieldFast* mFieldFast = nullptr; ///< External fast field map (barrel only for the moment)
o2::field::MagneticField* mField = nullptr; ///< External nominal field map
value_type mNominalBz = 0; ///< nominal field
bool mTGeoFallBackAllowed = true; ///< allow fall back to TGeo if requested MatLUT is not available
const o2::base::MatLayerCylSet* mMatLUT = nullptr; // externally set LUT
const o2::gpu::GPUTPCGMPolynomialField* mGPUField = nullptr; // externally set GPU Field
ClassDefNV(PropagatorImpl, 0);
};
using PropagatorF = PropagatorImpl<float>;
using PropagatorD = PropagatorImpl<double>;
using Propagator = PropagatorF;
} // namespace base
} // namespace o2
#endif