GeometryTransformer.h

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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
 
 
#ifndef O2_MID_GEOMETRYTRANSFORMER_H
#define O2_MID_GEOMETRYTRANSFORMER_H
 
#include <array>
#include "MIDBase/DetectorParameters.h"
#include "MathUtils/Cartesian.h"
 
class TGeoManager;
 
namespace o2
{
namespace mid
{
class GeometryTransformer
{
 public:
  void setMatrix(int deId, const ROOT::Math::Transform3D& matrix);
  inline const ROOT::Math::Transform3D getMatrix(int deId) { return mTransformations[deId]; }
 
  template <typename T>
  math_utils::Point3D<T> localToGlobal(int deId, const math_utils::Point3D<T>& position) const
  {
    return mTransformations[deId](position);
  }
  template <typename T>
  math_utils::Point3D<T> globalToLocal(int deId, const math_utils::Point3D<T>& position) const
  {
    return mTransformations[deId].ApplyInverse(position);
  }
  template <typename T>
  math_utils::Point3D<T> localToGlobal(int deId, T xPos, T yPos) const
  {
    return localToGlobal(deId, math_utils::Point3D<T>(xPos, yPos, 0.));
  }
  template <typename T>
  math_utils::Point3D<T> globalToLocal(int deId, T xPos, T yPos, T zPos) const
  {
    return globalToLocal(deId, math_utils::Point3D<T>(xPos, yPos, zPos));
  }
  template <typename T>
  math_utils::Vector3D<T> localToGlobal(int deId, const math_utils::Vector3D<T>& direction) const
  {
    return mTransformations[deId](direction);
  }
  template <typename T>
  math_utils::Vector3D<T> globalToLocal(int deId, const math_utils::Vector3D<T>& direction) const
  {
    return mTransformations[deId].ApplyInverse(direction);
  }
 
 private:
  std::array<o2::math_utils::Transform3D, detparams::NDetectionElements> mTransformations; 
};
 
ROOT::Math::Transform3D getDefaultChamberTransform(int ichamber);
ROOT::Math::Transform3D getDefaultRPCTransform(bool isRight, int chamber, int rpc);
GeometryTransformer createDefaultTransformer();
GeometryTransformer createTransformationFromManager(const TGeoManager* geoManager);
} // namespace mid
} // namespace o2
 
#endif /* O2_MID_GEOMETRYTRANSFORMER_H */