TGeoSurfaceConverter.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2020 CERN for the benefit of the Acts project
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#pragma once

#include "Acts/Definitions/Algebra.hpp"

#include <cmath>
#include <memory>
#include <string>
#include <tuple>

#include "RtypesCore.h"

class TGeoShape;
class TGeoMatrix;

namespace Acts {

class CylinderBounds;
class DiscBounds;
class PlanarBounds;
class Surface;
class TGeoDetectorElement;

struct TGeoSurfaceConverter {
  static std::tuple<std::shared_ptr<const CylinderBounds>, const Transform3,
                    double>
  cylinderComponents(const TGeoShape& tgShape, const Double_t* rotation,
                     const Double_t* translation, const std::string& axes,
                     double scalor = 10.) noexcept(false);

  static std::tuple<std::shared_ptr<const DiscBounds>, const Transform3, double>
  discComponents(const TGeoShape& tgShape, const Double_t* rotation,
                 const Double_t* translation, const std::string& axes,
                 double scalor = 10.) noexcept(false);

  static std::tuple<std::shared_ptr<const PlanarBounds>, const Transform3,
                    double>
  planeComponents(const TGeoShape& tgShape, const Double_t* rotation,
                  const Double_t* translation, const std::string& axes,
                  double scalor = 10.) noexcept(false);

  static std::tuple<std::shared_ptr<Surface>, ActsScalar> toSurface(
      const TGeoShape& tgShape, const TGeoMatrix& tgMatrix,
      const std::string& axes, double scalor = 10.) noexcept(false);

  static double toRadian(double degree) {
    if (degree > 180. and degree < 360.) {
      degree -= 360.;
    }
    return degree / 180. * M_PI;
  }
};

}  // namespace Acts