class AliITShit: public AliHit

 Default Constructor
 Zero data member just to be safe.
 Intputs:
    none.
 Outputs:
    none.
 Return:
    A default created AliITShit class.

 Create ITS hit
     The creator of the AliITShit class. The variables shunt and
 track are passed to the creator of the AliHit class. See the AliHit
 class for a full description. In the units of the Monte Carlo
 Inputs:
    Int_t shunt   See AliHit
    Int_t track   Track number, see AliHit
    Int_t *vol     Array of integer hit data,
                     vol[0] module
                     vol[1] not used
                     vol[2] not used
                     vol[3] Set of status bits
                     vol[4] Set of status bits at start
    Float_t edep       The energy deposited GeV during the transport
                       of this step
    Float_t tof        The time of flight of this particle at this step
    TLorenzVector &x   The Global position of this step [cm]
    TLorenzVector &x0  The Global position of where this step
                       started from [cm]
    TLorenzVector &p   The Global momentum of the particle at this
                       step [GeV/c]
 Outputs:
    none.
 Return:
    A default created AliITShit class.

 Create ITS hit
     The creator of the AliITShit class. The variables shunt and
 track are passed to the creator of the AliHit class. See the AliHit
 class for a full description. the integer array *vol contains, in order,
 fLayer = vol[0], fDet = vol[1], fLadder = vol[2], fStatus = vol[3].
 The array *hits contains, in order, fX = hits[0], fY = hits[1],
 fZ = hits[2], fPx = hits[3], fPy = hits[4], fPz = hits[5],
 fDestep = hits[6], and fTof = hits[7]. In the units of the Monte Carlo
 Intputs:
    Int_t shunt   See AliHit
    Int_t track   Track number, see AliHit
    Int_t *vol     Array of integer hit data,
                     vol[0] module number
                     vol[1] not used
                     vol[2] not used
                     vol[3] Set of status bits
                     vol[4] Set of status bits at start
    Float_t *hits   Array of hit information
                     hits[0] X global position of this hit
                     hits[1] Y global position of this hit
                     hits[2] Z global position of this hit
                     hits[3] Px global position of this hit
                     hits[4] Py global position of this hit
                     hits[5] Pz global position of this hit
                     hits[6] Energy deposited by this step
                     hits[7] Time of flight of this particle at this step
                     hits[8] X0 global position of start of step
                     hits[9] Y0 global position of start of step
                     hits[10] Z0 global position of start of step
                     hits[11] Time of flight of this particle before step
 Outputs:
    none.
 Return:
    A standard created AliITShit class.

 The standard copy constructor
 Inputs:
   AliITShit   &h the sourse of this copy
 Outputs:
   none.
 Return:
  A copy of the sourse hit h

 The standard = operator
 Inputs:
   AliITShit   &h the sourse of this copy
 Outputs:
   none.
 Return:
  A copy of the sourse hit h

 Sets track flag based on shunt value. Code copied from
 AliHit standar constructor.
 Inputs:
   Int_t shunt    A flag to indecate what to do with track numbers
 Outputs:
   none.
 Return:
   none.

     Returns the position and time of flight of this hit in the local
 coordinates of this module, and in the units of the Monte Carlo.
 Inputs:
   none.
 Outputs:
   Float_t x   Global position of this hit [cm]
   Float_t y   Global position of this hit [cm]
   Float_t z   Global poistion of this hit [cm]
   Float_t tof Time of flight of particle at this hit
 Return:
   none.

     Returns the initial position and time of flight of this hit
 in the local coordinates of this module, and in the units of the
 Monte Carlo.
 Inputs:
   none.
 Outputs:
   Double_t x   Global position of this hit [cm]
   Double_t y   Global position of this hit [cm]
   Double_t z   Global poistion of this hit [cm]
   Double_t tof Time of flight of particle at this hit
 Return:
   none.

     Returns the pointer to the TParticle for the particle that created
 this hit. From the TParticle all kinds of information about this
 particle can be found. See the TParticle class.
 Inputs:
   none.
 Outputs:
   none.
 Return:
   The TParticle of the track that created this hit.

 Returns the layer ladder and detector number lables for this
 ITS module. The use of layer, ladder and detector number for
 discribing the ITS is obsoleate.
 Inputs:
   none.
 Outputs:
   Int_t   &layer   Layer lable
   Int_t   &ladder  Ladder lable
   Int_t   &det     Detector lable
 Return:
    none.

 Standard output format for this class.
 Inputs:
   ostream *os   The output stream
 Outputs:
   none.
 Return:
   none.

 Standard input format for this class.
 Inputs:
   istream *is  the input stream
 Outputs:
   none.
 Return:
   none.

 Default destructor

 Get Hit information functions.
 virtual int GetTrack() const {return fTrack;} // define in AliHit
 virtual void SetTrack(int track) const {fTrack=track;) // AliHit

 returns the position in the Global frame

 returns the position in the Global frame

 Returns particle 3 position at this hit in global coordinates.

 hit in global coordinates.

 in global coordinates.

 in global coordinates.

 in global coordinates.

 Returns particle 3 position at this hit in global coordinates.

 Returns particle 3 position at this hit in global coordinates.

 returns the initial position in the Global frame and the
 time of flight

 Returns particle 3 position at this hit in local coordinates.

 Returns particle X position at this hit in local coordinates.

 Returns particle Y position at this hit in local coordinates.

 Returns particle Z position at this hit in local coordinates.

 Get Monti Carlo information about hit.

 returns the particle momentum in the Global frame

 in global coordinates.

 this hit in global coordinates.

 this hit in global coordinates.

 Prints out the content of this class in ASCII format.

 Reads in the content of this class in the format of Print