TrajectoryStateTransform.h

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#ifndef TrajectoryStateTransform_H
#define TrajectoryStateTransform_H

#include "DataFormats/TrajectoryState/interface/PTrajectoryStateOnDet.h"
#include "DataFormats/TrackReco/interface/TrackFwd.h" 

class TrajectoryStateOnSurface;
class FreeTrajectoryState;
class TrackingGeometry;
class Surface;
class MagneticField;

namespace trajectoryStateTransform {

  PTrajectoryStateOnDet persistentState( const TrajectoryStateOnSurface& ts,
                      unsigned int detid);

  TrajectoryStateOnSurface transientState( const PTrajectoryStateOnDet& ts,
                       const Surface* surface,
                       const MagneticField* field);

  FreeTrajectoryState initialFreeState( const reco::Track& tk,
                    const MagneticField* field);

  FreeTrajectoryState innerFreeState( const reco::Track& tk,
                      const MagneticField* field);
  FreeTrajectoryState outerFreeState( const reco::Track& tk,
                      const MagneticField* field);

  TrajectoryStateOnSurface innerStateOnSurface( const reco::Track& tk, 
                        const TrackingGeometry& geom,
                        const MagneticField* field);
  TrajectoryStateOnSurface outerStateOnSurface( const reco::Track& tk, 
                        const TrackingGeometry& geom,
                        const MagneticField* field);

}

// backward compatibility
struct TrajectoryStateTransform {};


#endif