AnalyticalTrajectoryExtrapolatorToLine.h

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#ifndef AnalyticalTrajectoryExtrapolatorToLine_h_
#define AnalyticalTrajectoryExtrapolatorToLine_h_

#include "DataFormats/GeometryVector/interface/GlobalPoint.h"
#include "DataFormats/GeometryVector/interface/GlobalVector.h"
#include "DataFormats/GeometryCommonDetAlgo/interface/DeepCopyPointerByClone.h"
#include "TrackingTools/GeomPropagators/interface/Propagator.h"

#include "FWCore/Utilities/interface/Visibility.h"

class FreeTrajectoryState;
class TrajectoryStateOnSurface;
class Line;
class IterativeHelixExtrapolatorToLine;
class MagneticField;

class AnalyticalTrajectoryExtrapolatorToLine {
public:
  AnalyticalTrajectoryExtrapolatorToLine(const MagneticField* field);

  AnalyticalTrajectoryExtrapolatorToLine(const Propagator&);

  TrajectoryStateOnSurface extrapolate(const FreeTrajectoryState& fts, const Line& L) const;

  TrajectoryStateOnSurface extrapolate(const TrajectoryStateOnSurface tsos, const Line& L) const;

private:
  TrajectoryStateOnSurface extrapolateFullState(const TrajectoryStateOnSurface tsos,
                                                const Line& line) const dso_internal;
  TrajectoryStateOnSurface extrapolateSingleState(const FreeTrajectoryState& fts, const Line& line) const dso_internal;
  bool propagateWithHelix(const IterativeHelixExtrapolatorToLine& extrapolator,
                          const Line& line,
                          GlobalPoint& x,
                          GlobalVector& p,
                          double& s) const dso_internal;

private:
  DeepCopyPointerByClone<Propagator> thePropagator;
};

#endif