[PWGDQ] Adding centrality to the gen distributions (#13594)

Co-authored-by: Lucamicheletti93 <luca.mike93@gmail.com>

Author: lucamicheletti93

PWGDQ/Core/VarManager.h

@@ -2007,6 +2007,7 @@ void VarManager::FillEvent(T const& event, float* values)
     values[kMCEventTime] = event.t();
     values[kMCEventWeight] = event.weight();
     values[kMCEventImpParam] = event.impactParameter();
+    values[kMCEventCentrFT0C] = event.centFT0C();
   }
 
   if constexpr ((fillMap & EventFilter) > 0 || (fillMap & RapidityGapFilter) > 0) {

PWGDQ/DataModel/ReducedInfoTables.h

@@ -221,7 +221,7 @@ DECLARE_SOA_TABLE(ReducedEventsInfo, "AOD", "REDUCEVENTINFO", //!   Main event i
 DECLARE_SOA_TABLE(ReducedMCEvents, "AOD", "REDUCEDMCEVENT", //!   Event level MC truth information
                   o2::soa::Index<>,
                   mccollision::GeneratorsID, reducedevent::MCPosX, reducedevent::MCPosY, reducedevent::MCPosZ,
-                  mccollision::T, mccollision::Weight, mccollision::ImpactParameter,
+                  mccollision::T, mccollision::Weight, mccollision::ImpactParameter, cent::CentFT0C,
                   mult::MultMCNParticlesEta05, mult::MultMCNParticlesEta08, mult::MultMCNParticlesEta10);
 
 using ReducedEvent = ReducedEvents::iterator;

PWGDQ/TableProducer/tableMakerMC.cxx

@@ -461,7 +461,7 @@ struct TableMakerMC {
       // make an entry for this MC event only if it was not already added to the table
       if (!(fEventLabels.find(mcCollision.globalIndex()) != fEventLabels.end())) {
         eventMC(mcCollision.generatorsID(), mcCollision.posX(), mcCollision.posY(), mcCollision.posZ(),
-                mcCollision.t(), mcCollision.weight(), mcCollision.impactParameter(), 1, 1, 1);
+                mcCollision.t(), mcCollision.weight(), mcCollision.impactParameter(), 1, 1, 1, 1);
         fEventLabels[mcCollision.globalIndex()] = fCounters[1];
         fCounters[1]++;
       }
@@ -1096,7 +1096,7 @@ struct TableMakerMC {
       // make an entry for this MC event only if it was not already added to the table
       if (!(fEventLabels.find(mcCollision.globalIndex()) != fEventLabels.end())) {
         eventMC(mcCollision.generatorsID(), mcCollision.posX(), mcCollision.posY(), mcCollision.posZ(),
-                mcCollision.t(), mcCollision.weight(), mcCollision.impactParameter(), 1, 1, 1);
+                mcCollision.t(), mcCollision.weight(), mcCollision.impactParameter(), 1, 1, 1, 1);
         fEventLabels[mcCollision.globalIndex()] = fCounters[1];
         fCounters[1]++;
       }

PWGDQ/TableProducer/tableMakerMC_withAssoc.cxx

@@ -469,7 +469,7 @@ struct TableMakerMC {
       fHistMan->FillHistClass("Event_MCTruth", VarManager::fgValues);
       // Create the skimmed table entry for this collision
       eventMC(mcCollision.generatorsID(), mcCollision.posX(), mcCollision.posY(), mcCollision.posZ(),
-              mcCollision.t(), mcCollision.weight(), mcCollision.impactParameter(),
+              mcCollision.t(), mcCollision.weight(), mcCollision.impactParameter(), mcCollision.bestCollisionCentFT0C(),
               mcCollision.multMCNParticlesEta05(), mcCollision.multMCNParticlesEta08(), mcCollision.multMCNParticlesEta10());
     }
   }