LCDSwimTraj

class LCDSwimTraj : public TObject

    private:

                           void CalcTrackParameters(Double_t fld)
                         Bool_t CheckInside(LCDDetectorVolume* pCur)
                          Int_t CircleIntersect(Double_t rv, TVector3& p1, TVector3& p2)
                       Double_t PhaseChange(TVector2 newP)
                static Double_t QuadRoot(const Double_t a, const Double_t b, const Double_t c, Bool_t* status)
      LCDSwimTraj::PropagateRet ShortestPath(Double_t sEnd, Double_t sIn, Double_t sOut, Double_t* pS)

    protected:


    public:

                    LCDSwimTraj LCDSwimTraj()
                    LCDSwimTraj LCDSwimTraj(LCDSwimTraj&)
                   virtual void ~LCDSwimTraj()
                 static TClass* Class()
                          Int_t GetCharge()
                       TVector3 GetIniMom()
                      TVector3* GetIniMomPtr()
                       TVector3 GetIniPos()
                      TVector3* GetIniPosPtr()
                       TVector3 GetNewMom()
                      TVector3* GetNewMomPtr()
                       TVector3 GetNewPos()
                      TVector3* GetNewPosPtr()
                       Double_t GetS()
      LCDSwimTraj::PropagateRet HelixPath(Double_t fld, Double_t s)
      LCDSwimTraj::PropagateRet HelixPath(Double_t s)
      LCDSwimTraj::PropagateRet HelixToCyl(LCDDetectorVolume* pCur, Double_t* pS)
                virtual TClass* IsA() const
      LCDSwimTraj::PropagateRet LinePath(Double_t s)
      LCDSwimTraj::PropagateRet LineToCyl(LCDDetectorVolume* pCur, Double_t* pS)
                           void SetParticleParams(const TVector3& pos, const TVector3& mom, Int_t charge)
                   virtual void ShowMembers(TMemberInspector& insp, char* parent)
                   virtual void Streamer(TBuffer& b)
                           void StreamerNVirtual(TBuffer& b)
                           void Update()

  Data Members
    private:

         Int_t q           charge
      TVector3 xtrj        position vector
      TVector3 ptrj        momentum vector
      TVector3 xnew        new position vector
      TVector3 pnew        new momentum vector
      Double_t m_tkpar[5]  helix parameter vector...
      Double_t deltaS      delta path length for last piece of propagation
      Double_t totalS      (geometrical) path length traversed by particle

    protected:


    public:

      static const LCDSwimTraj::PropagateRet INTERSECT_CYLIN      
      static const LCDSwimTraj::PropagateRet INTERSECT_ZMINUS     
      static const LCDSwimTraj::PropagateRet INTERSECT_NONE       
      static const LCDSwimTraj::PropagateRet INTERSECT_ZPLUS      
      static const LCDSwimTraj::PropagateRet INTERSECT_CYLOUT     
      static const LCDSwimTraj::PropagateRet INTERSECT_XYMOM      
      static const LCDSwimTraj::PropagateRet INTERSECT_UNCHARGED  
      static const LCDSwimTraj::PropagateRet INTERSECT_PATHOK     
      static const LCDSwimTraj::PropagateRet INTERSECT_ERROR      

Class Description

 SwimTraj

 This class does the work of propagating particles.

 This utility is used by SwimTraj::HelixToCy.

 Given two circles, one centered about the origin, find their points of
 intersection.  The return value is the number of solutions found.
 In this application, one circle is the (xy-projection) of a volume
 boundary, always centered about the origin.  The other the helix which
 is typically not centered about the origin.
 This algorithm is due to Rasmus Munk Larsen.

 Return change in phase needed to get to (newX, newY) from
 initial position

 Utility used when swimming linearly to cylinder.  Return
 Smallest positive root, if any.

 Compute and cache some information about this particle

 Invoke this routine when the result of the last request to propagate is
 is deemed OK.

Inline Functions

        LCDSwimTraj::PropagateRet HelixToCyl(LCDDetectorVolume* pCur, Double_t* pS)
        LCDSwimTraj::PropagateRet HelixPath(Double_t fld, Double_t s)
        LCDSwimTraj::PropagateRet HelixPath(Double_t s)
        LCDSwimTraj::PropagateRet LinePath(Double_t s)
        LCDSwimTraj::PropagateRet LineToCyl(LCDDetectorVolume* pCur, Double_t* pS)
                         TVector3 GetNewPos()
                        TVector3* GetNewPosPtr()
                         TVector3 GetNewMom()
                        TVector3* GetNewMomPtr()
                         TVector3 GetIniPos()
                        TVector3* GetIniPosPtr()
                         TVector3 GetIniMom()
                        TVector3* GetIniMomPtr()
                            Int_t GetCharge()
                         Double_t GetS()
                           Bool_t CheckInside(LCDDetectorVolume* pCur)
        LCDSwimTraj::PropagateRet ShortestPath(Double_t sEnd, Double_t sIn, Double_t sOut, Double_t* pS)
                          TClass* Class()
                          TClass* IsA() const
                             void ShowMembers(TMemberInspector& insp, char* parent)
                             void Streamer(TBuffer& b)
                             void StreamerNVirtual(TBuffer& b)
                      LCDSwimTraj LCDSwimTraj(LCDSwimTraj&)
                             void ~LCDSwimTraj()