Surface.h

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#ifndef SURFACE_H
#define SURFACE_H

#include <ostream>
#include "lardata/RecoObjects/KalmanLinearAlgebra.h"

namespace trkf {

  class Surface
  {
  public:

    enum TrackDirection {FORWARD, BACKWARD, UNKNOWN};

    Surface();

    virtual ~Surface();

    // Virtual methods.

    virtual Surface* clone() const = 0;

    virtual bool isTrackValid(const TrackVector& vec) const = 0;

    virtual void toLocal(const double xyz[3], double uvw[3]) const = 0;

    virtual void toGlobal(const double uvw[3], double xyz[3]) const = 0;

    virtual TrackVector getDiff(const TrackVector& vec1, const TrackVector& vec2) const;

    virtual void getPosition(const TrackVector& vec, double xyz[3]) const = 0;

    virtual TrackDirection getDirection(const TrackVector& /* vec */,
                                        TrackDirection dir=UNKNOWN) const {return dir;}

    virtual void getMomentum(const TrackVector& vec, double mom[3], 
                             TrackDirection dir=UNKNOWN) const = 0;

    virtual double PointingError(const TrackVector& vec, const TrackError& err) const = 0;

    virtual void getStartingError(TrackError& err) const = 0;

    virtual bool isParallel(const Surface& surf) const = 0;

    virtual double distanceTo(const Surface& surf) const = 0;

    virtual bool isEqual(const Surface& surf) const = 0;

    virtual std::ostream& Print(std::ostream& out) const = 0;
  };

  std::ostream& operator<<(std::ostream& out, const Surface& surf);
}

#endif