ClosestApproachOnHelices.h

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#ifndef _ClosestApproachOnHelices_H_
#define _ClosestApproachOnHelices_H_

#include "DataFormats/GeometryVector/interface/GlobalPoint.h"
#include <utility>

class FreeTrajectoryState;
class TrajectoryStateOnSurface;

class ClosestApproachOnHelices {
public:
  ClosestApproachOnHelices() {}

  virtual ~ClosestApproachOnHelices() {}

  virtual bool calculate(const TrajectoryStateOnSurface& sta, const TrajectoryStateOnSurface& stb) = 0;

  virtual bool calculate(const FreeTrajectoryState& sta, const FreeTrajectoryState& stb) = 0;

  virtual bool status() const = 0;

  virtual std::pair<GlobalPoint, GlobalPoint> points() const = 0;

  virtual GlobalPoint crossingPoint() const = 0;

  virtual float distance() const = 0;

  virtual ClosestApproachOnHelices* clone() const = 0;
};

#endif