HelixLineExtrapolation.h

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#ifndef HelixLineExtrapolation_H
#define HelixLineExtrapolation_H
 
#include "DataFormats/GeometryVector/interface/GlobalPoint.h"
#include "DataFormats/GeometryVector/interface/GlobalVector.h"
 
#include <utility>
 
class Line;
 
class HelixLineExtrapolation {
public:
  typedef Basic3DVector<float> PositionType;
  typedef Basic3DVector<float> DirectionType;
  typedef Basic3DVector<double> PositionTypeDouble;
  typedef Basic3DVector<double> DirectionTypeDouble;
 
public:
  virtual ~HelixLineExtrapolation() = default;
  //
  // the helix is passed to the constructor and does not appear in the interface
  //
 
  virtual std::pair<bool, double> pathLength(const GlobalPoint& point) const = 0;
 
  virtual std::pair<bool, double> pathLength(const Line& line) const = 0;
 
  virtual PositionType position(double s) const = 0;
 
  virtual DirectionType direction(double s) const = 0;
};
 
#endif