Bool_t FindPhotCkov (Double_t cluX,Double_t cluY,Double_t &thetaCer,Double_t &phiCer ); //find ckov angle for single photon candidate
Double_t FindRingCkov (Int_t iNclus ); //best ckov for ring formed by found photon candidates
void FindRingGeom (Double_t ckovAng,Int_t level=1 ); //estimated area of ring in cm^2 and portion accepted by geometry
TVector2 IntWithEdge (TVector2 p1,TVector2 p2 )const;//find intercection between plane and lines of 2 thetaC
Bool_t FindPhotCkov (Double_t cluX,Double_t cluY,Double_t &thetaCer,Double_t &phiCer ); //find ckov angle for single photon candidate
Double_t FindRingCkov (Int_t iNclus ); //best ckov for ring formed by found photon candidates
void FindRingGeom (Double_t ckovAng,Int_t level=1 ); //estimated area of ring in cm^2 and portion accepted by geometry
TVector2 IntWithEdge (TVector2 p1,TVector2 p2 )const;//find intercection between plane and lines of 2 thetaC