void Propagate (const TVector3 dir, TVector3 &pos,Double_t z )const;//propagate photon alogn the line
void Refract ( TVector3 &dir, Double_t n1, Double_t n2)const;//refract photon on the boundary
TVector2 TracePhot (Double_t ckovTh,Double_t ckovPh )const;//trace photon created by track to PC
+ void AddObjectToFriends(TClonesArray *pCluLst, Int_t photonIndex, AliESDtrack *pTrk ); // Add AliHMPIDCluster object to ESD friends
TVector2 TraceForward (TVector3 dirCkov )const;//tracing forward a photon from (x,y) to PC
void Lors2Trs (TVector3 dirCkov,Double_t &thetaCer,Double_t &phiCer )const;//LORS to TRS
void Trs2Lors (TVector3 dirCkov,Double_t &thetaCer,Double_t &phiCer )const;//TRS to LORS