class AliITSsimulationSSD: public AliITSsimulation

fDCS(0),
default Constructor
Inputs:
 none.
 Outputs:
 none.
 Return:
  A default construction AliITSsimulationSSD class

fDCS(0),
 Constructor
 Input:
   AliITSDetTypeSim    Pointer to the SSD dettype to be used
 Outputs:
   none.
 Return
   A standard constructed AliITSsimulationSSD class

 Inilizer, Inilizes all of the variable as needed in a standard place.
 Input:
   AliITSsegmentationSSD *seg  Pointer to the SSD segmentation to be used
   AliITSCalibrationSSD   *resp Pointer to the SSD responce class to be used
 Outputs:
   none.
 Return
   none.

 This function set the Tangent of the Lorentz angles.
 output: Bool_t : kTRUE in case of success

 Operator =

 copy constructor

 destructor

 Creates maps to build the list of tracks for each sumable digit
 Inputs:
   Int_t module    // Module number to be simulated
   Int_t event     // Event number to be simulated
 Outputs:
   none.
 Return
    none.

 Does the Sdigits to Digits work
 Inputs:
   none.
 Outputs:
   none.
 Return:
   none.

 Digitizes hits for one SSD module

 Produces Summable/Analog digits and writes them to the SDigit tree.

 Takes the pList and finishes the digitization.

 Loops over all hits to produce Analog/floating point digits. This
 is also the first task in producing standard digits.

 hit to digit conversion
 Turns hits in SSD module into one or more digits.
Float_t tang[2] = {0.0,0.0};
seg->Angles(tang[0], tang[1]);//stereo<<->tan(stereo)~=stereo

 Apply Noise.

 Apply the effect of electronic coupling between channels

 Kill dead channels setting gain to zero

 Computes the integral of a gaussian using Error Function

 integrate the diffusion gaussian
 remind: inf and sup are w-3sigma and w+3sigma
         we could define them here instead of passing them
         this way we are free to introduce asimmetry

 number of steps
 it also returns steps for each coord
AliITSsegmentationSSD *seg = new AliITSsegmentationSSD();
step = (Double_t) seg->GetStepSize();  // step size (cm)

 loop over nonzero digits

 charge to signal

 Fills the Summable digits Tree

 Fills fMap2A from the pList of Summable digits

Standard output format for this class

 Standard output streaming function.

 Get a pointer to the segmentation object

 set pointer to segmentation objec

returns a pointer to the SSD segmentation.
AliITSsegmentationSSD *GetSegmentation() {
	return (AliITSsegmentationSSD*) fSegmentation;}

Returns the ionization energy for Si in GeV.

Sets the ionization energy for Si in GeV.

Returns the Diffusion constant h in cm**2/sec

Sets the Diffusion constant h in cm**2/sec

Returns the Drift velocity for the side i

Sets the Drift velocity for the P and N sides

  Decide whether to use or not the Lorentz drift

 Getter for the Lorentz angles

 Standard ascii class print function

 Standard ascii class read function

 returns, from the segmentation, the number of stips

 returns, from the segmentation, the strip pitch