class AliITSAlignMille: public TObject

 main constructor that takes input from configuration file

 Destructor

 return 0 if success
        1 if error in module index or voluid

 set minimum number of points in specific detector or layer
 where = LAYER or DETECTOR
 ndet = detector number: 1-6 for LAYER and 1-3 for DETECTOR (SPD=1, SDD=2, SSD=3)
 updw = 1 for Y>0, -1 for Y<0, 0 if not specified
 nreqpts = minimum number of points of that type

 index from symname

 index from volume ID

 volume ID from symname
 works for sensitive volumes only

 volume ID from index

 initialize geometry

 Initialization of AliMillepede. Fix parameters, define constraints ...

 Constrain equation defined by par to value

 Initialize global parameters with par array

 Parameter iPar is encourage to vary in [-value;value].
 If value == 0, parameter is fixed

 Reset the derivative vectors

 apply starting realignment to ideal geometry

 works for sensitive volumes

 create a new AliTrackPointArray keeping only defined modules
 move points according to a given prealignment, if any
 sort alitrackpoints w.r.t. global Y direction, if selected

 sort alitrackpoints w.r.t. global Y direction

 initialize geometry parameters for a given detector
 for current cluster (fCluster)
 fGlobalInitParam[] is set as:
    [tx,ty,tz,psi,theta,phi]

 return 0 if success

 set as current the SuperModule that contains the 'index' sens.vol.

 set as current the SuperModule that contains the 'index' sens.vol.

 print infos

 return pointer to a define supermodule
 return NULL if error

 Initialize Riemann Fitter for current track
 return kFALSE if error

 initialize local parameters with different methods
 for current track (fTrack)

 checks if supermodule 'voluid' is defined and return the internal index
 return -1 if error

 checks if the sensitive module 'voluid' is contained inside a supermodule and return the internal index of the last identified supermodule
 return -1 if error

 check if a sensitive volume is contained inside one of the defined supermodules

 checks if AliTrackPoints belongs to defined modules
 return number of good poins
 return 0 if not enough points

 Process track; Loop over hits and set local equations
 here 'track' is a AliTrackPointArray
 return 0 if success;

 calculate intersection point of track with current module in local coordinates
 according with a given set of parameters (local(4/5) and global(6))
 and fill fPintLoc/Glo
    local are:   pgx0, pgz0, ugx, ugz   OR   riemann fitters pars
    global are:  tx,ty,tz,psi,theta,phi (Raff's delta angles in deg.)
 return 0 if success

 calculate numerically (ROOT's style) the derivatives for
 local X intersection  and local Z intersection
 parlist: local  (islpar=kTRUE)  pgx0, pgz0, ugx0, ugz0  OR riemann's params
          global (islpar=kFALSE) tx, ty, tz, psi, theta, phi (Raf's angles in deg)
 return 0 if success

 Define local equation for current cluster in X and Z coor.
 and store them to memory
 return 0 if success

 Set local equations with data stored in m
 return 0 if success

 Call local fit for this track

 Call global fit; Global parameters are stored in parameters

 Get error of parameter iPar

 Print global parameters

 load definitions of supermodules from a root file
 return 0 if success

 configuration methods

 fitting methods

 fitting stuffs

 geometry stuffs

 debug stuffs