Syncronize the MagicNumbers header in AtlasHepMC and in TruthUtils

Syncronize the MagicNumbers header in AtlasHepMC and in TruthUtils

Generators/TruthUtils/TruthUtils/MagicNumbers.h

@@ -3,8 +3,8 @@
 */
 /* Author: Andrii Verbytskyi andrii.verbytskyi@mpp.mpg.de */
 
-#ifndef TRUTHUTILS_MAGICNUMBERS_H
-#define TRUTHUTILS_MAGICNUMBERS_H
+#ifndef ATLASHEPMC_MAGICNUMBERS_H
+#define ATLASHEPMC_MAGICNUMBERS_H
 
 #include <limits>
 namespace HepMC {
@@ -28,6 +28,10 @@ constexpr int INVALID_PARTICLE_BARCODE = -1;
 template <class T>  inline bool is_simulation_particle(const T& p){ return (p->barcode()>SIM_BARCODE_THRESHOLD);}
 template <>  inline bool is_simulation_particle(const int& b){ return (b>SIM_BARCODE_THRESHOLD);}
 
+template <class T>  inline int generations(const T& p){ return (barcode(p)/SIM_REGENERATION_INCREMENT);}
+template <>  inline int generations(const int& b){ return (b/SIM_REGENERATION_INCREMENT);}
+
+
 template <class T>  inline bool is_simulation_vertex(const T& p){ return (p->barcode()<-SIM_BARCODE_THRESHOLD);}
 template <>  inline bool is_simulation_vertex(const int& b){ return (b<-SIM_BARCODE_THRESHOLD);}