StraightLinePlaneCrossing.h

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#ifndef StraightLinePlaneCrossing_H_
#define StraightLinePlaneCrossing_H_
 
#include "DataFormats/GeometryVector/interface/Basic3DVector.h"
#include "DataFormats/TrajectorySeed/interface/PropagationDirection.h"
 
#include <utility>
 
class Plane;
 
class StraightLinePlaneCrossing {
public:
  using PositionType = Basic3DVector<float>;
  using DirectionType = Basic3DVector<float>;
 
public:
  StraightLinePlaneCrossing(const PositionType& point,
                            const DirectionType& momentum,
                            const PropagationDirection propDir = alongMomentum)
      : theX0(point), theP0(momentum.unit()), thePropDir(propDir) {}
 
  // destructor
  ~StraightLinePlaneCrossing() {}
 
  std::pair<bool, double> pathLength(const Plane& plane) const;
 
  PositionType position(float s) const { return PositionType(theX0 + s * theP0); }
 
  std::pair<bool, PositionType> position(const Plane& plane) const;
 
private:
  //
  // single precision vectors sufficient for internal use
  //
 
  const PositionType theX0;
  const PositionType theP0;
  const PropagationDirection thePropDir;
};
 
#endif