[FOCAL-66] ECAL geoemetry and step manager for pads (#13249)

- ECAL geometry and step manager for pads
- Split ProcessHit for ECAL and HCAL
- Split Pad and Pixels geometry
- Common sensitive volume list for HCAL, Pads Pixels.

Author: amatyja

Detectors/FOCAL/simulation/include/FOCALSimulation/Detector.h

@@ -23,6 +23,7 @@ class FairVolume;
 namespace o2::focal
 {
 
+class Hit;
 class Geometry;
 
 /// \struct Parent
@@ -39,6 +40,16 @@ struct Parent {
 /// \ingroup FOCALsimulation
 /// \author Markus Fasel <markus.fasel@cern.ch>, Oak Ridge National Laboratory
 /// \since June 6, 2024
+/// \author Adam Matyja <adam.tomasz.matyja@cern.ch>, Institute of Nuclear Physics, PAN, Cracov, Poland
+/// \since June 24, 2024
+/// class based on AliFOCALv2.h in aliroot
+/// It builds the ECAL (Adam) and HCAL (Hadi) seperately
+/// For the ECAL: it builds it tower by tower
+/// For the HCAL:
+///
+/// The detector class handles the implementation of the FOCAL detector
+/// within the virtual Monte-Carlo framework and the simulation of the
+/// FOCAL detector up to hit generation
 class Detector : public o2::base::DetImpl<Detector>
 {
  public:
@@ -139,25 +150,43 @@ class Detector : public o2::base::DetImpl<Detector>
 
   virtual void addAlignableVolumes() const override;
   void addAlignableVolumesHCAL() const;
+  void addAlignableVolumesECAL() const;
 
   void ConstructGeometry() override;
 
   virtual void CreateHCALSpaghetti();
   virtual void CreateHCALSandwich();
 
+  /// \brief Generate ECAL geometry
+  void CreateECALGeometry();
+
   /// \brief Add new superparent to the container
   /// \param trackID Track ID of the superparent
   /// \param pdg PDG code of the superparent
   /// \param energy Energy of the superparent
   Parent* AddSuperparent(int trackID, int pdg, double energy);
 
+  /// \brief Processing hit creation in the ECAL Pad sensitive volume
+  /// \param v Current sensitive volume
+  bool ProcessHitsEPad(FairVolume* v = nullptr);
+
+  /// \brief Processing hit creation in the ECAL Pixel sensitive volume
+  /// \param v Current sensitive volume
+  bool ProcessHitsEPix(FairVolume* v = nullptr);
+
+  /// \brief Processing hit creation in the HCAL sensitive volume
+  /// \param v Current sensitive volume
+  bool ProcessHitsHCAL(FairVolume* v = nullptr);
+
  private:
   /// \brief Copy constructor (used in MT)
   Detector(const Detector& rhs);
 
   Geometry* mGeometry; //!<! Geometry pointer
 
   int mMedSensHCal = 0; //!<! Sensitive Medium for HCal
+  int mMedSensECalPad = 0; //!<! Sensitive Medium for ECal Pads
+  int mMedSensECalPix = 0; //!<! Sensitive Medium for ECal Pixels
 
   std::vector<const Composition*> mGeoCompositions; //!<! list of FOCAL compositions
 
@@ -172,8 +201,8 @@ class Detector : public o2::base::DetImpl<Detector>
   Int_t mCurrentPrimaryID; //!<! ID of the current primary
   Int_t mCurrentParentID;  //!<! ID of the current parent
 
-  std::vector<std::string> mSensitiveHCAL; //!<! List of sensitive volumes
-  int mVolumeIDScintillator = -1;          //!<! Volume ID of the scintillator volume
+  std::vector<std::string> mSensitive; //!<! List of sensitive volumes
+  int mVolumeIDScintillator = -1;      //!<! Volume ID of the scintillator volume
 
   template <typename Det>
   friend class o2::base::DetImpl;
@@ -194,4 +223,4 @@ struct UseShm<o2::focal::Detector> {
 } // namespace o2
 #endif
 
-#endif // ALICEO2_FOCAL_DETECTOR_H_
+#endif // ALICEO2_FOCAL_DETECTOR_H_