Topology.h

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#ifndef Geometry_CommonTopologies_Topology_H
#define Geometry_CommonTopologies_Topology_H

#include "DataFormats/GeometryVector/interface/LocalPoint.h"
#include "DataFormats/GeometrySurface/interface/LocalError.h"
#include "DataFormats/GeometryCommonDetAlgo/interface/MeasurementPoint.h"
#include "DataFormats/GeometryCommonDetAlgo/interface/MeasurementError.h"
#include "DataFormats/Math/interface/AlgebraicROOTObjects.h"

class GeomDetType;

class Topology {
public:
  typedef Basic2DVector<double> Vector2D;
  typedef Vector2D::MathVector MathVector2D;
  class LocalTrackAngles : public Vector2D {
  public:
    typedef Basic2DVector<double> Base;
    LocalTrackAngles() {}
    LocalTrackAngles(const Base &v) : Base(v) {}
    LocalTrackAngles(double dxdz, double dydz) : Base(dxdz, dydz) {}
    double dxdz() const { return x(); }
    double dydz() const { return y(); }
  };
  typedef Point2DBase<double, LocalTag> Local2DPoint;
  class LocalTrackPred {
  public:
    LocalTrackPred() {}
    LocalTrackPred(double x, double y, double dxdz, double dydz) : point_(x, y), angles_(dxdz, dydz) {}
    LocalTrackPred(const AlgebraicVector5 &localTrajPar)
        : point_(localTrajPar[3], localTrajPar[4]), angles_(localTrajPar[1], localTrajPar[2]) {}
    const Local2DPoint &point() const { return point_; }
    const LocalTrackAngles &angles() const { return angles_; }

  private:
    Local2DPoint point_;       
    LocalTrackAngles angles_;  
  };

  virtual ~Topology() {}

  // Conversion between measurement (strip, pixel, ...) coordinates
  // and local cartesian coordinates

  virtual LocalPoint localPosition(const MeasurementPoint &) const = 0;

  virtual LocalError localError(const MeasurementPoint &, const MeasurementError &) const = 0;

  virtual MeasurementPoint measurementPosition(const LocalPoint &) const = 0;

  virtual MeasurementError measurementError(const LocalPoint &, const LocalError &) const = 0;

  virtual int channel(const LocalPoint &p) const = 0;

  // new sets of methods taking also an angle
  virtual LocalPoint localPosition(const MeasurementPoint &mp, const LocalTrackPred & /*trkPred*/) const {
    return localPosition(mp);
  }

  virtual LocalError localError(const MeasurementPoint &mp,
                                const MeasurementError &me,
                                const LocalTrackPred & /*trkPred*/) const {
    return localError(mp, me);
  }

  virtual MeasurementPoint measurementPosition(const LocalPoint &lp, const LocalTrackAngles & /*dir*/) const {
    return measurementPosition(lp);
  }

  virtual MeasurementError measurementError(const LocalPoint &lp,
                                            const LocalError &le,
                                            const LocalTrackAngles & /*dir*/) const {
    return measurementError(lp, le);
  }

  virtual int channel(const LocalPoint &lp, const LocalTrackAngles & /*dir*/) const { return channel(lp); }

private:
};

#endif