class AliITSUGeomTGeo: public TObject

 default c-tor

 copy c-tor

d-tor

 cp op.

 This routine computes the chip index number from the layer,
 stave, and chip number in stave.
 Inputs:
    Int_t lay  The layer number. Starting from 0.
    Int_t sta  The stave number. Starting from 0
    Int_t chipInStave  The chip number in the stave. Starting from 0

 This routine computes the chip index number from the layer,
 stave, substave and chip number in substave.
 Inputs:
    Int_t lay  The layer number. Starting from 0.
    Int_t sta  The stave number. Starting from 0
    Int_t substa  The substave number. Starting from 0
    Int_t chipInSStave  The chip number in the sub stave. Starting from 0

 This routine computes the chip index number from the layer,
 stave, substave module and chip number in module.
 Inputs:
    Int_t lay  The layer number. Starting from 0.
    Int_t sta  The stave number. Starting from 0
    Int_t substa  The substave number. Starting from 0
    Int_t module  The module number ...
    Int_t chipInSStave  The chip number in the module. Starting from 0

 This routine computes the layer number a
 given the chip index. The
 Inputs:
     Int_t index  The chip index number, starting from zero.
 Outputs:
     Int_t indexInLr The chip index inside a layer, starting from zero.
     Int_t lay    The layer number. Starting from 0.

 Get chip layer, from 0

 Get chip stave, from 0

 Get chip substave id in stave, from 0

 Get chip module id in substave, from 0

 Get chip number within layer, from 0

 Get chip number within stave, from 0

 Get chip number within stave, from 0

 Get chip number within module, from 0

 This routine computes the layer, stave, substave, module and chip number
 given the chip index number.
 Inputs:
     Int_t index  The chip index number, starting from zero.
 Outputs:
     Int_t lay    The layer number. Starting from 0
     Int_t sta    The stave number. Starting from 0
     Int_t ssta   The halfstave number. Starting from 0
     Int_t mod    The module number. Starting from 0
     Int_t chip   The detector number. Starting from 0

 Get the TGeoPNEntry symbolic name
 for a given chip identified by 'index'

 sym name of the layer

 sym name of the layer

 sym name of the stave at given layer

 sym name of the stave at given layer

 sym name of the substave at given layer/stave

 sym name of the chip in the given layer/stave/substave/module

 Get the transformation matrix for a given chip 'index'
 by quering the TGeoManager

 Get the translation vector for a given chip 'index'
 by quering the TGeoManager

 Get the rotation matrix for a given chip 'index'
 by quering the TGeoManager

 Get the original (ideal geometry) TGeo matrix for
 a given chip identified by 'index'.
 The method is slow, so it should be used
 with great care.

 Get the original translation vector (ideal geometry)
 for a given chip 'index' by quering the TGeoManager

 Get the original rotation matrix (ideal geometry)
 for a given chip 'index' by quering the TGeoManager

 Get the matrix which transforms from the tracking to local r.s.
 The method queries directly the TGeoPNEntry

 Get the matrix which transforms from the tracking r.s. to
 the global one.
 Returns kFALSE in case of error.

 Get the transformation matrix of the SENSOR (not necessary the same as the chip)
 for a given chip 'index' by quering the TGeoManager

 Get a pointer to the TGeoPNEntry of a chip
 identified by 'index'
 Returns NULL in case of invalid index,
 missing TGeoManager or invalid symbolic name

 exract upg ITS parameters from TGeo

 Determines the number of layers in the Upgrade Geometry

 Determines the number of layers in the Upgrade Geometry

 Inputs:
   lay: layer number, starting from 0

 MS

 Determines the number of substaves in the stave of the layer

 Inputs:
   lay: layer number, starting from 0

 MS

 Determines the number of modules in substave in the stave of the layer

 Inputs:
   lay: layer number, starting from 0

 for the setup w/o modules defined the module and the stave or the substave is the same thing

 Determines the number of chips per module on the (sub)stave in the Upgrade Geometry
 Also extract the layout: span of module centers in Z and X
 Inputs:
   lay: layer number from 0
 MS

 Determines the layer detector type the Upgrade Geometry

 Inputs:
   lay: layer number from 0
 Outputs:
   none
 Return:
   detector type id for the layer
 MS

 print

 store pointer on often used matrices for faster access

 create tracking to local (Sensor!) matrices

 extract Number following the prefix in the name string

 hack to avoid using AliGeomManager