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FastHelix.h

Go to the documentation of this file.

#ifndef TR_FastHelix_H_
#define TR_FastHelix_H_

#include "DataFormats/GeometryVector/interface/GlobalPoint.h"
#include "TrackingTools/TrajectoryState/interface/FreeTrajectoryState.h"
#include "RecoTracker/TkSeedGenerator/interface/FastCircle.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "MagneticField/Engine/interface/MagneticField.h"
// You don't really want to know why the rest does not compile on Sun 
// whthout this method, and why it compiles with it. 
inline GlobalPoint sun_bullshit( const GlobalPoint point) {
  return point;
}

class FastHelix {

private:
  
  typedef FreeTrajectoryState FTS;

public:

  FastHelix(const GlobalPoint& outerHit, 
            const GlobalPoint& middleHit,
            const GlobalPoint& aVertex,
            const edm::EventSetup& iSetup);
  
  ~FastHelix() {}
  
  bool isValid() const {return theCircle.isValid();}

  FTS stateAtVertex() const;

  FTS helixStateAtVertex() const;

  FTS straightLineStateAtVertex() const;

private:
  
  GlobalPoint theOuterHit;
  GlobalPoint theMiddleHit;
  GlobalPoint theVertex;
  FastCircle theCircle;
  edm::ESHandle<MagneticField> pSetup;
  GlobalVector tesla0;
};

#endif //TR_FastHelix_H_

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