IPropagator.h

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/*
  Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
*/

// IPropagator.h, (c) ATLAS Detector software
 
#ifndef TRKEXINTERFACES_IPROPAGATOR_H
#define TRKEXINTERFACES_IPROPAGATOR_H
 
// Gaudi
#include "GaudiKernel/EventContext.h"
#include "GaudiKernel/IAlgTool.h"
 
// Trk
#include "TrkEventPrimitives/ParticleHypothesis.h"
#include "TrkEventPrimitives/PropDirection.h"
#include "TrkExInterfaces/HelperStructs.h"
#include "TrkExUtils/ExtrapolationCache.h"
#include "TrkExUtils/TrackSurfaceIntersection.h"
#include "TrkNeutralParameters/NeutralParameters.h"
#include "TrkParameters/ComponentParameters.h"
#include "TrkParameters/TrackParameters.h"
#include "TrkSurfaces/BoundaryCheck.h"
// STL
#include <utility>
#include <deque>
#include <optional>
 
namespace Trk {
 
class Surface;
class CylinderBounds;
class MagneticFieldProperties;
class TransportJacobian;
class TrackStateOnSurface;
class TrackingVolume;

typedef std::pair<const TrackParameters*, double> TrackParametersWithPath;

typedef std::pair<const Surface*, BoundaryCheck> DestSurf;

static const InterfaceID IID_IPropagator("IPropagator", 1, 0);

class IPropagator : virtual public IAlgTool
{
public:
  virtual ~IPropagator() = default;

  static const InterfaceID& interfaceID() { return IID_IPropagator; }

  virtual std::unique_ptr<NeutralParameters> propagate(
    const NeutralParameters& parameters,
    const Surface& sf,
    PropDirection dir,
    const BoundaryCheck& bcheck,
    bool returnCurv = false) const = 0;

  virtual std::unique_ptr<TrackParameters> propagate(
    const EventContext& ctx,
    const TrackParameters& parm,
    const Surface& sf,
    PropDirection dir,
    const BoundaryCheck& bcheck,
    const MagneticFieldProperties& mprop,
    ParticleHypothesis particle = pion,
    bool returnCurv = false,
    const TrackingVolume* tVol = nullptr) const = 0;

  virtual Trk::MultiComponentState multiStatePropagate(
    const EventContext& ctx,
    const MultiComponentState& multiComponentState,
    const Surface& surface,
    const MagneticFieldProperties& fieldProperties,
    const PropDirection direction = Trk::anyDirection,
    const BoundaryCheck& boundaryCheck = true,
    const ParticleHypothesis particleHypothesis = nonInteracting) const = 0;

  virtual std::unique_ptr<TrackParameters> propagate(
    const EventContext& ctx,
    const TrackParameters& parm,
    std::vector<DestSurf>& sfs,
    PropDirection dir,
    const MagneticFieldProperties& mprop,
    ParticleHypothesis particle,
    std::vector<unsigned int>& solutions,
    double& path,
    bool usePathLim = false,
    bool returnCurv = false,
    const TrackingVolume* tVol = nullptr) const = 0;

  virtual std::unique_ptr<TrackParameters> propagateT(
    const EventContext& ctx,
    const TrackParameters& parm,
    std::vector<DestSurf>& sfs,
    PropDirection dir,
    const MagneticFieldProperties& mprop,
    ParticleHypothesis particle,
    std::vector<unsigned int>& solutions,
    PathLimit& pathLim,
    TimeLimit& timeLim,
    bool returnCurv,
    const TrackingVolume* tVol,
    std::vector<Trk::HitInfo>*& hitVector) const = 0;

  virtual std::unique_ptr<TrackParameters> propagateM(
    const EventContext& ctx,
    const TrackParameters& parm,
    std::vector<DestSurf>& sfs,
    PropDirection dir,
    const MagneticFieldProperties& mprop,
    ParticleHypothesis particle,
    std::vector<unsigned int>& solutions,
    std::vector<const Trk::TrackStateOnSurface*>* matstates,
    std::vector<std::pair<std::unique_ptr<Trk::TrackParameters>, int>>*
      intersections,
    double& path,
    bool usePathLim = false,
    bool returnCurv = false,
    const TrackingVolume* tVol = nullptr,
    Trk::ExtrapolationCache* cache = nullptr) const = 0;

  virtual std::unique_ptr<TrackParameters> propagate(
    const EventContext& ctx,
    const TrackParameters& parm,
    const Surface& sf,
    PropDirection dir,
    const BoundaryCheck& bcheck,
    const MagneticFieldProperties& mprop,
    std::optional<TransportJacobian>& jacob,
    double& pathLength,
    ParticleHypothesis particle = pion,
    bool returnCurv = false,
    const TrackingVolume* tVol = nullptr) const = 0;

  virtual std::unique_ptr<TrackParameters> propagateParameters(
    const EventContext& ctx,
    const TrackParameters& parm,
    const Surface& sf,
    PropDirection dir,
    const BoundaryCheck& bcheck,
    const MagneticFieldProperties& mprop,
    ParticleHypothesis particle = pion,
    bool returnCurv = false,
    const TrackingVolume* tVol = nullptr) const = 0;

  virtual std::unique_ptr<TrackParameters> propagateParameters(
    const EventContext& ctx,
    const TrackParameters& parm,
    const Surface& sf,
    PropDirection dir,
    const BoundaryCheck& bcheck,
    const MagneticFieldProperties& mprop,
    std::optional<TransportJacobian>& jacob,
    ParticleHypothesis particle = pion,
    bool returnCurv = false,
    const TrackingVolume* tVol = nullptr) const = 0;

  virtual std::optional<TrackSurfaceIntersection> intersect(
    const EventContext& ctx,
    const TrackParameters& parm,
    const Surface& sf,
    const MagneticFieldProperties& mprop,
    ParticleHypothesis particle = pion,
    const TrackingVolume* tVol = nullptr) const = 0;

  virtual std::optional<TrackSurfaceIntersection> intersectSurface(
    const EventContext& ctx,
    const Surface& surface,
    const TrackSurfaceIntersection& trackIntersection,
    const double qOverP,
    const MagneticFieldProperties& mft,
    ParticleHypothesis particle) const = 0;

  virtual void globalPositions(const EventContext& ctx,
                               std::deque<Amg::Vector3D>& positionslist,
                               const TrackParameters& parm,
                               const MagneticFieldProperties& mprop,
                               const CylinderBounds& cylbo,
                               double stepSize,
                               ParticleHypothesis particle = pion,
                               const TrackingVolume* tVol = nullptr) const = 0;
 
};
 
} // end of namespace
 
#endif // TRKEXINTERFACES_PROPAGATOR_H