TrackingGeometry.h

#pragma once
 
// Acts
#include <Acts/Geometry/CuboidVolumeBuilder.hpp>
#include <Acts/Geometry/TrackingGeometry.hpp>
#include <Acts/Geometry/TrackingGeometryBuilder.hpp>
#include <Acts/Surfaces/DiamondBounds.hpp>
#include <Acts/Surfaces/PlaneSurface.hpp>
 
#include "Acts/Definitions/Units.hpp"
#include "Acts/Material/HomogeneousSurfaceMaterial.hpp"
#include "Acts/Material/HomogeneousVolumeMaterial.hpp"
 
// Visualization
#include <Acts/Visualization/GeometryView3D.hpp>
#include <Acts/Visualization/ObjVisualization3D.hpp>
#include <Acts/Visualization/ViewConfig.hpp>
 
// G4
#include <G4Box.hh>
#include <G4GDMLParser.hh>
#include <G4LogicalVolume.hh>
#include <G4Material.hh>
#include <G4Polyhedra.hh>
#include <G4Types.hh>
#include <G4VPhysicalVolume.hh>
#include <boost/filesystem.hpp>
#include <string>
 
#include "Framework/ConditionsObject.h"
#include "Framework/Configure/Parameters.h"
#include "Framework/Exception/Exception.h"
#include "Tracking/geo/DetectorElement.h"
 
namespace tracking::geo {
 
class TrackingGeometry : public framework::ConditionsObject {
 public:
  TrackingGeometry(const std::string& name, const Acts::GeometryContext& gctx,
                   const std::string& gdml, bool debug);
 
  virtual ~TrackingGeometry() = default;
 
  G4VPhysicalVolume* findDaughterByName(G4VPhysicalVolume* pvol, G4String name);
  void getAllDaughters(G4VPhysicalVolume* pvol);
 
  static bool compareZlocation(const G4VPhysicalVolume& pvol_a,
                               const G4VPhysicalVolume& pvol_b) {
    return (pvol_a.GetTranslation().z() < pvol_b.GetTranslation().z());
  };
 
  void ConvertG4Rot(const G4RotationMatrix* g4rot,
                    Acts::RotationMatrix3& rot) const;
  Acts::Vector3 ConvertG4Pos(const G4ThreeVector& g4pos) const;
 
  void dumpGeometry(const std::string& outputDir,
                    const Acts::GeometryContext& gctx) const;
 
  std::shared_ptr<const Acts::TrackingGeometry> getTG() const {
    return tGeometry_;
  };
 
  Acts::Transform3 GetTransform(const G4VPhysicalVolume& phex,
                                bool toTrackingFrame = false) const;
 
  Acts::Transform3 toTracker(const Acts::Transform3& trans) const;
 
  // Tagger tracker: vol=2 , layer = [2,4,6,8,10,12,14], sensor=[1,2]
  // Recoil tracker: vol=3 , layer = [2,4,6,8,10,12],
  // sensor=[1,2,3,4,5,6,7,8,9,10]
  void makeLayerSurfacesMap();
 
  void getSurfaces(std::vector<const Acts::Surface*>& surfaces) const;
 
  const Acts::Surface* getSurface(int layerid) const {
    return layer_surface_map_.at(layerid);
  }
 
  std::unordered_map<unsigned int, const Acts::Surface*> layer_surface_map_;
 
  // Global vector holding all the alignable detector elements of the tracking
  // geometry.
  std::vector<std::shared_ptr<DetectorElement>> detElements;
 
 protected:
  // This is not actually used anywhere
  // TODO:: Remove this.
  const Acts::GeometryContext& gctx_;
 
  std::string gdml_{""};
  bool debug_{false};
  // The rotation matrices to go from global to tracking frame.
  Acts::RotationMatrix3 x_rot_, y_rot_;
  std::shared_ptr<const Acts::TrackingGeometry> tGeometry_{nullptr};
  G4VPhysicalVolume* fWorldPhysVol_{nullptr};
};
}  // namespace tracking::geo